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Carmen Merodio - One of the best experts on this subject based on the ideXlab platform.
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effect of high carbon dioxide concentration on pal activity and phenolic contents in ripening Cherimoya fruit
Postharvest Biology and Technology, 2001Co-Authors: Joston S Assis, María I. Escribano, Teresa Muñoz, Roberto Maldonado, Carmen MerodioAbstract:Abstract Cherimoya fruit ( Annona cherimola , Mill.) were kept at 20°C in air or in 20% CO 2 for 3 days and then transferred to air, to study the effect of a high CO 2 treatment on phenolic metabolism and ripening-related changes. Total polyphenol levels remained constant while a rapid decline in lignin content was observed in Cherimoyas stored in air. However, a sharp increase in PAL activity up to the second day at 20°C was observed. The maximum ethylene production was observed 2 days later. At the end of the CO 2 treatment, ethylene production was inhibited and PAL activity was similar to that found in air-treated fruit. These data suggest that the increase in PAL activity at 20°C was not affected by high CO 2 and does not relate to ethylene. The CO 2 treatment inhibited flesh softening and maintained lignin at levels found in freshly harvested fruit. Exposure to 20% CO 2 also improved internal colour and increased the non-tannin polyphenol fraction, but prevented the decline in the tannin fraction otherwise observed upon ripening in air. We concluded that high CO 2 treatment at 20°C did not enhance PAL activity and lignin deposition although treated fruits retained more lignin after transfer to air. The possible involvement of PAL activity in the supply of important metabolic compounds for early events of ripening will be discussed.
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Phosphoenolpyruvate carboxylase from Cherimoya fruit: properties, kinetics and effects of high CO2
Phytochemistry, 2001Co-Authors: Teresa Muñoz, María I. Escribano, Carmen MerodioAbstract:Abstract Phospho enol pyruvate carboxylase (PEPC, EC 4.1.1.31) regulatory properties were studied in non-photosynthetic (mesocarp) and photosynthetic (peel) tissues from Cherimoya ( Annona cherimola Mill.) fruit stored in air, in order to gain a better understanding of in vivo enzyme regulation. Analyses were also performed with fruit treated with 20% CO 2 –20% O 2 to define the role of PEPC as part of an adaptive mechanism to high external carbon dioxide levels. The results revealed that the special kinetic characteristics of the enzyme from mesocarp—high V max and low sensibility to l -malate inhibition - are related to the active acid metabolism of these fruits and point to a high rate of reassimilation of respired CO 2 into keto-acids. With respect to fruit stored in air, PEPC in crude extracts from CO 2 -treated Cherimoyas gave a similar V max (1.12±0.03 μkat·mg −1 protein), a lower apparent K m (68±9 μM for PEP) and a higher I 50 of l -malate (5.95±0.3 mM). These kinetic values showed the increase in the affinity of this enzyme toward one of its substrate, PEP, by elevated external CO 2 concentrations. The lower K m value and lower sensitivity to l -malate are consistent with higher in vivo carboxylation reaction efficiency in CO 2 -treated Cherimoyas, while pointing to an additional enzyme regulation system via CO 2 .
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Effect of high CO2 level on the titres of γ-aminobutyric acid, total polyamines and some pathogenesis-related proteins in Cherimoya fruit stored at low temperature
Journal of Experimental Botany, 1998Co-Authors: Carmen Merodio, M. T. Muñoz, B Del Cura, D. Buitrago, María I. EscribanoAbstract:In this study the effect of treatment with 20% CO 2 plus 20% O 2 for 3 d on γ-aminobutyric acid (GABA) was analysed and total polyamine titres and the production of some pathogenesis-related proteins (PR-proteins) in Cherimoya (Annona cherimola Mill.) fruit stored at low temperature. In immunoassays with anti-PR-Q and PR-2 protein sera, high CO 2 levels were found to provoke the co-ordinated accumulation of a chitinase-like protein and 1,3-β-glucanase. Chitinase activity was higher in treated than in untreated fruit. At the end of CO 2 treatment, total polyamine and γ-aminobutyric acid content and uptake of O 2 were observed to be higher in treated compared to untreated fruit, but the accumulation of these compounds decreased when the fruit was transferred to air. Since this treatment effectively retains the fruit quality (Escribano et al., 1997), high CO 2 levels may have a direct effect on the activation of the above-mentioned specific responses that enables Cherimoya fruit to overcome chilling temperature. The relationship between the activation of the defence system and the capacity to regulate cytoplasmic pH in CO 2 -treated fruits was also addressed.
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THE EFFECT OF HIGH CARBON DIOXIDE AT LOW TEMPERATURE ON RIBULOSE 1,5-BIPHOSPHATE CARBOXYLASE AND POLYGALACTURONASE PROTEIN LEVELS IN Cherimoya FRUIT
Journal of the American Society for Horticultural Science, 1997Co-Authors: María I. Escribano, Teresa Muñoz, Begoña Del Cura, Carmen MerodioAbstract:The effect of short-term high CO2 on maintaining postharvest Cherimoya (Annona cherimola Mill.) fruit quality during storage at low temperature was analyzed. Pretreatment with an atmosphere of 20% CO2 and 20% O2 for 3 days retained fruit firmness and prevented an increase in the immunodetected levels of polygalacturonase-related protein during storage at 6 °C. Color scale values, chlorophyll content, and levels of the immunoreactive large subunit of ribulose 1,5-biphosphate carboxylase protein were higher in treated than in air-stored fruit. Short-term high CO2 treatment had a long residual effect at low temperature and improved storage life by preventing fruit softening and delaying senescence-like responses in green peel of Cherimoya fruit tissues.
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High Carbon dioxide Delays Postharvest Changes in RuBPCase and Polygalacturonase-related Protein in Cherimoya Peel
Journal of the American Society for Horticultural Science, 1996Co-Authors: Begoña Del Cura, María I. Escribano, J. P. Zamorano, Carmen MerodioAbstract:The peel of 'Fino de Jete' Cherimoya ( Annona cherimola Mill.) stored at 20 °C in air and in an atmosphere with high levels of CO 2 was analyzed for changes in protein levels, color, chlorophyll content, and firmness. The accumulation of immunoreactive proteins was studied using Rubisco and polygalacturonase antibodies. During storage in air, Cherimoya peel tissues exhibited a decrease in chlorophyll content and an immunodetected drop in the abundance of the large subunit of ribulose 1,5-biphosphate carboxylase (LSR). An immunodetected rise in polygalacturonase (PG)-related protein was quantified. High CO 2 levels delayed the softening of Cherimoya fruit, retarded the maximum accumulation of PG-related protein, and maintained LSR levels, greenness, and chlorophyll content of peel tissues.
María I. Escribano - One of the best experts on this subject based on the ideXlab platform.
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effect of high carbon dioxide concentration on pal activity and phenolic contents in ripening Cherimoya fruit
Postharvest Biology and Technology, 2001Co-Authors: Joston S Assis, María I. Escribano, Teresa Muñoz, Roberto Maldonado, Carmen MerodioAbstract:Abstract Cherimoya fruit ( Annona cherimola , Mill.) were kept at 20°C in air or in 20% CO 2 for 3 days and then transferred to air, to study the effect of a high CO 2 treatment on phenolic metabolism and ripening-related changes. Total polyphenol levels remained constant while a rapid decline in lignin content was observed in Cherimoyas stored in air. However, a sharp increase in PAL activity up to the second day at 20°C was observed. The maximum ethylene production was observed 2 days later. At the end of the CO 2 treatment, ethylene production was inhibited and PAL activity was similar to that found in air-treated fruit. These data suggest that the increase in PAL activity at 20°C was not affected by high CO 2 and does not relate to ethylene. The CO 2 treatment inhibited flesh softening and maintained lignin at levels found in freshly harvested fruit. Exposure to 20% CO 2 also improved internal colour and increased the non-tannin polyphenol fraction, but prevented the decline in the tannin fraction otherwise observed upon ripening in air. We concluded that high CO 2 treatment at 20°C did not enhance PAL activity and lignin deposition although treated fruits retained more lignin after transfer to air. The possible involvement of PAL activity in the supply of important metabolic compounds for early events of ripening will be discussed.
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Phosphoenolpyruvate carboxylase from Cherimoya fruit: properties, kinetics and effects of high CO2
Phytochemistry, 2001Co-Authors: Teresa Muñoz, María I. Escribano, Carmen MerodioAbstract:Abstract Phospho enol pyruvate carboxylase (PEPC, EC 4.1.1.31) regulatory properties were studied in non-photosynthetic (mesocarp) and photosynthetic (peel) tissues from Cherimoya ( Annona cherimola Mill.) fruit stored in air, in order to gain a better understanding of in vivo enzyme regulation. Analyses were also performed with fruit treated with 20% CO 2 –20% O 2 to define the role of PEPC as part of an adaptive mechanism to high external carbon dioxide levels. The results revealed that the special kinetic characteristics of the enzyme from mesocarp—high V max and low sensibility to l -malate inhibition - are related to the active acid metabolism of these fruits and point to a high rate of reassimilation of respired CO 2 into keto-acids. With respect to fruit stored in air, PEPC in crude extracts from CO 2 -treated Cherimoyas gave a similar V max (1.12±0.03 μkat·mg −1 protein), a lower apparent K m (68±9 μM for PEP) and a higher I 50 of l -malate (5.95±0.3 mM). These kinetic values showed the increase in the affinity of this enzyme toward one of its substrate, PEP, by elevated external CO 2 concentrations. The lower K m value and lower sensitivity to l -malate are consistent with higher in vivo carboxylation reaction efficiency in CO 2 -treated Cherimoyas, while pointing to an additional enzyme regulation system via CO 2 .
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Effect of high CO2 level on the titres of γ-aminobutyric acid, total polyamines and some pathogenesis-related proteins in Cherimoya fruit stored at low temperature
Journal of Experimental Botany, 1998Co-Authors: Carmen Merodio, M. T. Muñoz, B Del Cura, D. Buitrago, María I. EscribanoAbstract:In this study the effect of treatment with 20% CO 2 plus 20% O 2 for 3 d on γ-aminobutyric acid (GABA) was analysed and total polyamine titres and the production of some pathogenesis-related proteins (PR-proteins) in Cherimoya (Annona cherimola Mill.) fruit stored at low temperature. In immunoassays with anti-PR-Q and PR-2 protein sera, high CO 2 levels were found to provoke the co-ordinated accumulation of a chitinase-like protein and 1,3-β-glucanase. Chitinase activity was higher in treated than in untreated fruit. At the end of CO 2 treatment, total polyamine and γ-aminobutyric acid content and uptake of O 2 were observed to be higher in treated compared to untreated fruit, but the accumulation of these compounds decreased when the fruit was transferred to air. Since this treatment effectively retains the fruit quality (Escribano et al., 1997), high CO 2 levels may have a direct effect on the activation of the above-mentioned specific responses that enables Cherimoya fruit to overcome chilling temperature. The relationship between the activation of the defence system and the capacity to regulate cytoplasmic pH in CO 2 -treated fruits was also addressed.
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THE EFFECT OF HIGH CARBON DIOXIDE AT LOW TEMPERATURE ON RIBULOSE 1,5-BIPHOSPHATE CARBOXYLASE AND POLYGALACTURONASE PROTEIN LEVELS IN Cherimoya FRUIT
Journal of the American Society for Horticultural Science, 1997Co-Authors: María I. Escribano, Teresa Muñoz, Begoña Del Cura, Carmen MerodioAbstract:The effect of short-term high CO2 on maintaining postharvest Cherimoya (Annona cherimola Mill.) fruit quality during storage at low temperature was analyzed. Pretreatment with an atmosphere of 20% CO2 and 20% O2 for 3 days retained fruit firmness and prevented an increase in the immunodetected levels of polygalacturonase-related protein during storage at 6 °C. Color scale values, chlorophyll content, and levels of the immunoreactive large subunit of ribulose 1,5-biphosphate carboxylase protein were higher in treated than in air-stored fruit. Short-term high CO2 treatment had a long residual effect at low temperature and improved storage life by preventing fruit softening and delaying senescence-like responses in green peel of Cherimoya fruit tissues.
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High Carbon dioxide Delays Postharvest Changes in RuBPCase and Polygalacturonase-related Protein in Cherimoya Peel
Journal of the American Society for Horticultural Science, 1996Co-Authors: Begoña Del Cura, María I. Escribano, J. P. Zamorano, Carmen MerodioAbstract:The peel of 'Fino de Jete' Cherimoya ( Annona cherimola Mill.) stored at 20 °C in air and in an atmosphere with high levels of CO 2 was analyzed for changes in protein levels, color, chlorophyll content, and firmness. The accumulation of immunoreactive proteins was studied using Rubisco and polygalacturonase antibodies. During storage in air, Cherimoya peel tissues exhibited a decrease in chlorophyll content and an immunodetected drop in the abundance of the large subunit of ribulose 1,5-biphosphate carboxylase (LSR). An immunodetected rise in polygalacturonase (PG)-related protein was quantified. High CO 2 levels delayed the softening of Cherimoya fruit, retarded the maximum accumulation of PG-related protein, and maintained LSR levels, greenness, and chlorophyll content of peel tissues.
Zacarias Echevarria, Carol Carla - One of the best experts on this subject based on the ideXlab platform.
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Propuesta de un modelo asociativo para la mejora de la producción de chirimoya en el distrito de San Juan, valle de Jequetepeque, para la exportación de harina de chirimoya a la ciudad de Miami - Estados Unidos en el año 2017
Universidad Privada del Norte, 2018Co-Authors: Barranzuela Mamani, Kimberley Sara, Zacarias Echevarria, Carol CarlaAbstract:RESUMEN La presente investigación tiene por objetivo general proponer un modelo asociativo para mejorar la producción de chirimoya en el distrito de San Juan, Valle de Jequetepeque en la Región de Cajamarca, para la exportación de harina de chirimoya a la ciudad de Miami – EE.UU. en el año 2017. Con la finalidad de resolver el problema elaborando un diagnóstico de la situación actual de la producción de chirimoya del Valle de Jequetepeque, distrito de San Juan, realizando la evaluación de las ventajas y desventajas del modelo asociativo en la Región de Cajamarca, creando así la propuesta de implementar un modelo asociativo adecuado para los productores de dicho valle, asimismo diseñar un plan de negocios de exportación de la harina de chirimoya a la ciudad de Miami, Estados Unidos en el año 2017. Se procedió a realizar el diagnostico situacional de la producción y de los productores de chirimoya del Valle del Jequetepeque, del distrito de San Juan, al realizar dicho diagnostico situacional se logró establecer las principales características de la producción de chirimoya, determinando que no es tecnificada, que no tienen protocolos sobre el adecuado manejo de la producción de chirimoya, lo que no permite un mejor rendimiento, asimismo, no cuentan con el apoyo de las entidades del estado para mejorar dicho problema. PALABRAS CLAVE: modelo asociativo, productor, producción, chirimoya.ABSTRACT The present research has the general objective of proposing an associative model for the improvement of the production of Cherimoya in San Juan district, Valley of Jequetepeque, for the export of Cherimoya flour Cherimoya to the city of Miami - United States in the year 2017. In order to solve the problem, a diagnosis of the current situation of Cherimoya production in the Valley of Jequetepeque, San Juan district, was carried out, evaluating the advantages and disadvantages of the associative model in the Region of Cajamarca. Proposal to implement an appropriate associative model for the producers of this valley, as well as to design a business plan for the export of Cherimoya flour to the city of Miami, United States in 2017. The situational diagnosis of the production and the Cherimoya producers of the Valley of the Jequetepeque, of the district of San Juan, was carried out to carry out this situational diagnosis. It was possible to establish the main characteristics of the production of Cherimoya, determining that it is not technician, which do not have protocols on the proper management of Cherimoya production, which does not allow a better performance, also, do not have the support of the state entities to improve this problem. KEYWORDS: Associative model, producer, production, cherimoy
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Propuesta de un modelo asociativo para la mejora de la producción de chirimoya en el distrito de San Juan, valle de Jequetepeque, para la exportación de harina de chirimoya a la ciudad de Miami - Estados Unidos en el año 2017
'Dipartimento di Economia Universita di Perugia (IT)', 2018Co-Authors: Barranzuela Mamani, Kimberley Sara, Zacarias Echevarria, Carol CarlaAbstract:ABSTRACT The present research has the general objective of proposing an associative model for the improvement of the production of Cherimoya in San Juan district, Valley of Jequetepeque, for the export of Cherimoya flour Cherimoya to the city of Miami - United States in the year 2017. In order to solve the problem, a diagnosis of the current situation of Cherimoya production in the Valley of Jequetepeque, San Juan district, was carried out, evaluating the advantages and disadvantages of the associative model in the Region of Cajamarca. Proposal to implement an appropriate associative model for the producers of this valley, as well as to design a business plan for the export of Cherimoya flour to the city of Miami, United States in 2017. The situational diagnosis of the production and the Cherimoya producers of the Valley of the Jequetepeque, of the district of San Juan, was carried out to carry out this situational diagnosis. It was possible to establish the main characteristics of the production of Cherimoya, determining that it is not technician, which do not have protocols on the proper management of Cherimoya production, which does not allow a better performance, also, do not have the support of the state entities to improve this problem. Key words: associative model, producer, production, CherimoyaTesisLa presente investigación tiene por objetivo general proponer un modelo asociativo para mejorar la producción de chirimoya en el distrito de San Juan, Valle de Jequetepeque en la Región de Cajamarca, para la exportación de harina de chirimoya a la ciudad de Miami – EE.UU. en el año 2017. Con la finalidad de resolver el problema elaborando un diagnóstico de la situación actual de la producción de chirimoya del Valle de Jequetepeque, distrito de San Juan, realizando la evaluación de las ventajas y desventajas del modelo asociativo en la Región de Cajamarca, creando así la propuesta de implementar un modelo asociativo adecuado para los productores de dicho valle, asimismo diseñar un plan de negocios de exportación de la harina de chirimoya a la ciudad de Miami, Estados Unidos en el año 2017. Se procedió a realizar el diagnostico situacional de la producción y de los productores de chirimoya del Valle del Jequetepeque, del distrito de San Juan, al realizar dicho diagnostico situacional se logró establecer las principales características de la producción de chirimoya, determinando que no es tecnificada, que no tienen protocolos sobre el adecuado manejo de la producción de chirimoya, lo que no permite un mejor rendimiento, asimismo, no cuentan con el apoyo de las entidades del estado para mejorar dicho problema. Palabras clave: modelo asociativo, productor, producción, chirimoy
Barranzuela Mamani, Kimberley Sara - One of the best experts on this subject based on the ideXlab platform.
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Propuesta de un modelo asociativo para la mejora de la producción de chirimoya en el distrito de San Juan, valle de Jequetepeque, para la exportación de harina de chirimoya a la ciudad de Miami - Estados Unidos en el año 2017
Universidad Privada del Norte, 2018Co-Authors: Barranzuela Mamani, Kimberley Sara, Zacarias Echevarria, Carol CarlaAbstract:RESUMEN La presente investigación tiene por objetivo general proponer un modelo asociativo para mejorar la producción de chirimoya en el distrito de San Juan, Valle de Jequetepeque en la Región de Cajamarca, para la exportación de harina de chirimoya a la ciudad de Miami – EE.UU. en el año 2017. Con la finalidad de resolver el problema elaborando un diagnóstico de la situación actual de la producción de chirimoya del Valle de Jequetepeque, distrito de San Juan, realizando la evaluación de las ventajas y desventajas del modelo asociativo en la Región de Cajamarca, creando así la propuesta de implementar un modelo asociativo adecuado para los productores de dicho valle, asimismo diseñar un plan de negocios de exportación de la harina de chirimoya a la ciudad de Miami, Estados Unidos en el año 2017. Se procedió a realizar el diagnostico situacional de la producción y de los productores de chirimoya del Valle del Jequetepeque, del distrito de San Juan, al realizar dicho diagnostico situacional se logró establecer las principales características de la producción de chirimoya, determinando que no es tecnificada, que no tienen protocolos sobre el adecuado manejo de la producción de chirimoya, lo que no permite un mejor rendimiento, asimismo, no cuentan con el apoyo de las entidades del estado para mejorar dicho problema. PALABRAS CLAVE: modelo asociativo, productor, producción, chirimoya.ABSTRACT The present research has the general objective of proposing an associative model for the improvement of the production of Cherimoya in San Juan district, Valley of Jequetepeque, for the export of Cherimoya flour Cherimoya to the city of Miami - United States in the year 2017. In order to solve the problem, a diagnosis of the current situation of Cherimoya production in the Valley of Jequetepeque, San Juan district, was carried out, evaluating the advantages and disadvantages of the associative model in the Region of Cajamarca. Proposal to implement an appropriate associative model for the producers of this valley, as well as to design a business plan for the export of Cherimoya flour to the city of Miami, United States in 2017. The situational diagnosis of the production and the Cherimoya producers of the Valley of the Jequetepeque, of the district of San Juan, was carried out to carry out this situational diagnosis. It was possible to establish the main characteristics of the production of Cherimoya, determining that it is not technician, which do not have protocols on the proper management of Cherimoya production, which does not allow a better performance, also, do not have the support of the state entities to improve this problem. KEYWORDS: Associative model, producer, production, cherimoy
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Propuesta de un modelo asociativo para la mejora de la producción de chirimoya en el distrito de San Juan, valle de Jequetepeque, para la exportación de harina de chirimoya a la ciudad de Miami - Estados Unidos en el año 2017
'Dipartimento di Economia Universita di Perugia (IT)', 2018Co-Authors: Barranzuela Mamani, Kimberley Sara, Zacarias Echevarria, Carol CarlaAbstract:ABSTRACT The present research has the general objective of proposing an associative model for the improvement of the production of Cherimoya in San Juan district, Valley of Jequetepeque, for the export of Cherimoya flour Cherimoya to the city of Miami - United States in the year 2017. In order to solve the problem, a diagnosis of the current situation of Cherimoya production in the Valley of Jequetepeque, San Juan district, was carried out, evaluating the advantages and disadvantages of the associative model in the Region of Cajamarca. Proposal to implement an appropriate associative model for the producers of this valley, as well as to design a business plan for the export of Cherimoya flour to the city of Miami, United States in 2017. The situational diagnosis of the production and the Cherimoya producers of the Valley of the Jequetepeque, of the district of San Juan, was carried out to carry out this situational diagnosis. It was possible to establish the main characteristics of the production of Cherimoya, determining that it is not technician, which do not have protocols on the proper management of Cherimoya production, which does not allow a better performance, also, do not have the support of the state entities to improve this problem. Key words: associative model, producer, production, CherimoyaTesisLa presente investigación tiene por objetivo general proponer un modelo asociativo para mejorar la producción de chirimoya en el distrito de San Juan, Valle de Jequetepeque en la Región de Cajamarca, para la exportación de harina de chirimoya a la ciudad de Miami – EE.UU. en el año 2017. Con la finalidad de resolver el problema elaborando un diagnóstico de la situación actual de la producción de chirimoya del Valle de Jequetepeque, distrito de San Juan, realizando la evaluación de las ventajas y desventajas del modelo asociativo en la Región de Cajamarca, creando así la propuesta de implementar un modelo asociativo adecuado para los productores de dicho valle, asimismo diseñar un plan de negocios de exportación de la harina de chirimoya a la ciudad de Miami, Estados Unidos en el año 2017. Se procedió a realizar el diagnostico situacional de la producción y de los productores de chirimoya del Valle del Jequetepeque, del distrito de San Juan, al realizar dicho diagnostico situacional se logró establecer las principales características de la producción de chirimoya, determinando que no es tecnificada, que no tienen protocolos sobre el adecuado manejo de la producción de chirimoya, lo que no permite un mejor rendimiento, asimismo, no cuentan con el apoyo de las entidades del estado para mejorar dicho problema. Palabras clave: modelo asociativo, productor, producción, chirimoy
Robert Groenemans - One of the best experts on this subject based on the ideXlab platform.
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Land suitability assessment for Cherimoya in southern Ecuador using expert knowledge and GIS
Agriculture Ecosystems & Environment, 1998Co-Authors: L Bydekerke, E. Van Ranst, Luc Vanmechelen, Robert GroenemansAbstract:Abstract Cherimoya ( Annona cherimola Mill.), a wild fruit-tree growing under specific physical land conditions in southern Ecuador, has a distinct economic potential. Its natural occurrence in southern Ecuador is largely restricted to locations within the 1500–2200 m altitude range. In this study, an attempt has been made to assess the suitability of land to grow Cherimoya in the province of Loja. Attributes of the physical environment, based on expert knowledge from various regions growing Cherimoya, were collected and used for the suitability assessment. Each attribute (rainfall, Koppens' climatic classification, altitude, soil type and ecotype) was mapped with the help of a GIS and classified on the basis of predefined growth requirements. Climatic and soil requirements for Cherimoya growth were identified and a land suitability map was produced by overlaying the climatic and soil suitability maps. The climatic suitability map reveals suitable regions within the 1500–2200 m altitude range, where favourable temperature conditions prevail. About 24% of the study area is found to be suitable for Cherimoya growth, but only 2% is highly suitable. The most suitable areas are found in the south-east of the province. In the rest of the province climatic or chemical soil fertility conditions are expected to restrict Cherimoya growth. The results of this study can be used for further research on the possibilities for a large-scale commercialisation of the crop in southern Ecuador and in other regions with favourable ecological conditions.