The Experts below are selected from a list of 435 Experts worldwide ranked by ideXlab platform
Tomasz Hura - One of the best experts on this subject based on the ideXlab platform.
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activity of the photosynthetic apparatus in dehydrated leaves of a perennial shrub Rosa Rubiginosa l with different levels of drought memory
2021Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Agnieszka Ostrowska, Tomasz HuraAbstract:Abstract The aim of the study was to analyze the activity of the photosynthetic apparatus during induced dehydration of leaves harvested from perennial shrubs of Rosa Rubiginosa growing at wet and dry sites and differing in the level of drought memory. The markers of drought memory included accumulation of D1 (PsbA) protein, chaperone Cpn60, Rubisco activase (RA), and Rubisco larger subunit (RbcL). The study investigated the levels of soluble carbohydrates and phenolic compounds, of cell wall-bound phenolics, non-enzymatic antioxidants, and assimilation pigments. During induced dehydration, leaves from the dry site exhibited slower water loss and greater activity of the photosynthetic apparatus, particularly in terms of effectiveness of electron transport between PSII and PSI. They also effectively dissipated excessive excitation energy in the form of heat and far-red fluorescence. Higher level of D1 protein in the leaves collected from the dry site was accompanied by lower accumulation of Cpn60, RA and RbcL proteins and considerably higher content of soluble carbohydrates and carotenoids. Drought memory in R. Rubiginosa may be associated with a low level of proteins responsible for photosynthetic fixation of CO2 and reduced content of chlorophyll a and b, and also with enhanced accumulation of D1 protein and soluble carbohydrates and carotenoids.
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phytohormone synthesis pathways in sweet briar rose Rosa Rubiginosa l seedlings with high adaptation potential to soil drought
2020Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:The study aimed to determine the phytohormone profile of sweet briar rose (Rosa Rubiginosa L.) seedlings and privileged synthesis pathways of individual hormones including gibberellins, cytokinins and auxins in response to long-term soil drought. We detected eight gibberellins, nine auxins and fifteen cytokinins. Abscisic acid (ABA) was also detected as a sensitive indicator of water stress. Thirty days of soil drought induced significant increase of ABA content and species-specific quantitative changes of other phytohormones. We established preferred synthesis pathways for three gibberellins, six auxins and eight cytokinins. Both an increase and decrease in gibberellin and cytokinin levels may modulate sweet briar's response to soil water shortage. In the case of auxins, induction of effective adaptation mechanisms to extremely dry environments is mostly triggered by their rising levels. Under drought stress, sweet briar seedlings increased their gibberellin pool at the expense of reducing the pool of cytokinins and auxins. This may indicate a specific role of gibberellins in adaptation mechanisms to long-term soil water deficit developed by sweet briar.
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physiological traits determining high adaptation potential of sweet briar Rosa Rubiginosa l at early stage of growth to dry lands
2019Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:Little is known about mechanisms of sweet briar adaptation to dry habitats. The species is highly invasive and displaces native plants from dry lands of the southern hemisphere. This study evaluates physiological basis of Rosa Rubiginosa L. adaptation to soil drought. We performed a pot soil drought experiment and assessed water relations, water use efficiency, gas exchange and photosynthetic apparatus activity. The study also measured the content of chlorophyll, soluble carbohydrates and proline and analyzed plant biomass growth. We hypothesized that the drought stress induced an effective mechanism enabling adaptation of young sweet briar roses to soil water deficit. The study identified several adaptation mechanisms of R. Rubiginosa allowing the plant to survive soil drought. These included limiting transpiration and stomatal conductance, increasing the level of soluble sugars, reducing chlorophyll content, accumulating CO2 in intercellular spaces, and increasing the quantum yield of electron transport from QA− to the PSI end electron acceptors. As a result, young sweet briar roses limited water loss and photoinhibition damage to the photosynthetic apparatus, which translated into consumption of soluble sugars for growth purposes. This study showed that photosynthesis optimization and increased activity of the photosynthetic apparatus made it possible to avoid photoinhibition and to effectively use water and sugars to maintain growth during water stress. This mechanism is probably responsible for the invasive nature of R. Rubiginosa and its huge potential to displace native plant species from dry habitats of the southern hemisphere.
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z połnocy na południe czyli inwazyjny charakter roży rdzawej Rosa Rubiginosa l
2018Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Tomasz HuraAbstract:Sweet briar (Rosa Rubiginosa L.) is characterized by an unusual course of meiosis, resistance to fungal pathogens and high tolerance to abiotic stresses. It is native to the Northern Hemisphere (Europe, North America, and Asian part of Russia), where it forms small-scale populations. The shrub prefers sunny sites and calcium-rich soils. Rosa Rubiginosa has been introduced to the Southern Hemisphere (South America, Australia, New Zealand), where it is an invasive species capable of displacing native vegetation. In this part of the world it is considered a weed, but it is also a pioneering plant that colonizes areas degraded by ecological disasters and human activity. It protects nearby plant species by providing them with adequate soil and air humidity and light conditions. This paper discusses the huge potential of sweet briar in acclimatization to environmental stresses.
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physiological responses of Rosa Rubiginosa to saline environment
2017Co-Authors: Tomasz Hura, Katarzyna Hura, Bozena Szewczyktaranek, Krzysztof Nowak, Bozena PawlowskaAbstract:The aim of this work was to analyse the response of Rosa Rubiginosa to salinity induced by different concentrations of sodium chloride and calcium chloride (0, 25, 50, 100, 150 and 200 mM). Besides salt accumulation and pH changes, other parameters were investigated including photosynthetic activity, leaf water content, the dynamics of necrosis and chlorosis appearance and leaf drying. The study was complemented with microscopic analysis of changes in leaf anatomy. R. Rubiginosa was more sensitive to the salinity induced by calcium chloride than by sodium chloride. Plant response to salinity differed depending of the salt concentration. These differences were manifested by higher dynamics of necrosis and chlorosis appearance and leaf drying. CaCl2 showed greater inhibition of the photosynthetic apparatus and photosynthetic activity. Treatment with CaCl2 caused more visible deformation of palisade cells, reduction in their density and overall reduction in leaf thickness. The study demonstrated higher accumulation of CaCl2 in the soil, and thus greater limitations in water availability resulting in reduced leaf water content and quicker drying of leaves as compared with NaCl-treated plants.
Gladys Tapia - One of the best experts on this subject based on the ideXlab platform.
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dietary Rosa mosqueta Rosa Rubiginosa oil prevents high diet induced hepatic steatosis in mice
2015Co-Authors: Amanda Despessailles, Camila G Dossi, Alejandra Espinosa, Daniel Gonzalezmanan, Gladys TapiaAbstract:The effects of dietary Rosa mosqueta (RM, Rosa Rubiginosa) oil, rich in α-linolenic acid, in the prevention of liver steatosis were studied in mice fed a high fat diet (HFD). C57BL/6j mice were fed either a control diet or HFD with or without RM oil for 12 weeks. The results indicate that RM oil supplementation decreases fat infiltration of the liver from 43.8% to 6.2%, improving the hepatic oxidative state, insulin levels, HOMA index, and both body weight and adipose tissue weight of HFD plus RM treated animals compared to HFD without supplementation. In addition, the DHA concentration in the liver was significantly increased in HFD fed mice with RM oil compared to HFD (3 vs. 1.6 g per 100 g FAME). The n-6/n-3 ratio was not significantly modified by treatment with RM. Our findings suggest that RM oil supplementation prevents the development of hepatic steatosis and the obese phenotype observed in HFD fed mice.
Joanna Gadzinowska - One of the best experts on this subject based on the ideXlab platform.
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activity of the photosynthetic apparatus in dehydrated leaves of a perennial shrub Rosa Rubiginosa l with different levels of drought memory
2021Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Agnieszka Ostrowska, Tomasz HuraAbstract:Abstract The aim of the study was to analyze the activity of the photosynthetic apparatus during induced dehydration of leaves harvested from perennial shrubs of Rosa Rubiginosa growing at wet and dry sites and differing in the level of drought memory. The markers of drought memory included accumulation of D1 (PsbA) protein, chaperone Cpn60, Rubisco activase (RA), and Rubisco larger subunit (RbcL). The study investigated the levels of soluble carbohydrates and phenolic compounds, of cell wall-bound phenolics, non-enzymatic antioxidants, and assimilation pigments. During induced dehydration, leaves from the dry site exhibited slower water loss and greater activity of the photosynthetic apparatus, particularly in terms of effectiveness of electron transport between PSII and PSI. They also effectively dissipated excessive excitation energy in the form of heat and far-red fluorescence. Higher level of D1 protein in the leaves collected from the dry site was accompanied by lower accumulation of Cpn60, RA and RbcL proteins and considerably higher content of soluble carbohydrates and carotenoids. Drought memory in R. Rubiginosa may be associated with a low level of proteins responsible for photosynthetic fixation of CO2 and reduced content of chlorophyll a and b, and also with enhanced accumulation of D1 protein and soluble carbohydrates and carotenoids.
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phytohormone synthesis pathways in sweet briar rose Rosa Rubiginosa l seedlings with high adaptation potential to soil drought
2020Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:The study aimed to determine the phytohormone profile of sweet briar rose (Rosa Rubiginosa L.) seedlings and privileged synthesis pathways of individual hormones including gibberellins, cytokinins and auxins in response to long-term soil drought. We detected eight gibberellins, nine auxins and fifteen cytokinins. Abscisic acid (ABA) was also detected as a sensitive indicator of water stress. Thirty days of soil drought induced significant increase of ABA content and species-specific quantitative changes of other phytohormones. We established preferred synthesis pathways for three gibberellins, six auxins and eight cytokinins. Both an increase and decrease in gibberellin and cytokinin levels may modulate sweet briar's response to soil water shortage. In the case of auxins, induction of effective adaptation mechanisms to extremely dry environments is mostly triggered by their rising levels. Under drought stress, sweet briar seedlings increased their gibberellin pool at the expense of reducing the pool of cytokinins and auxins. This may indicate a specific role of gibberellins in adaptation mechanisms to long-term soil water deficit developed by sweet briar.
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physiological traits determining high adaptation potential of sweet briar Rosa Rubiginosa l at early stage of growth to dry lands
2019Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:Little is known about mechanisms of sweet briar adaptation to dry habitats. The species is highly invasive and displaces native plants from dry lands of the southern hemisphere. This study evaluates physiological basis of Rosa Rubiginosa L. adaptation to soil drought. We performed a pot soil drought experiment and assessed water relations, water use efficiency, gas exchange and photosynthetic apparatus activity. The study also measured the content of chlorophyll, soluble carbohydrates and proline and analyzed plant biomass growth. We hypothesized that the drought stress induced an effective mechanism enabling adaptation of young sweet briar roses to soil water deficit. The study identified several adaptation mechanisms of R. Rubiginosa allowing the plant to survive soil drought. These included limiting transpiration and stomatal conductance, increasing the level of soluble sugars, reducing chlorophyll content, accumulating CO2 in intercellular spaces, and increasing the quantum yield of electron transport from QA− to the PSI end electron acceptors. As a result, young sweet briar roses limited water loss and photoinhibition damage to the photosynthetic apparatus, which translated into consumption of soluble sugars for growth purposes. This study showed that photosynthesis optimization and increased activity of the photosynthetic apparatus made it possible to avoid photoinhibition and to effectively use water and sugars to maintain growth during water stress. This mechanism is probably responsible for the invasive nature of R. Rubiginosa and its huge potential to displace native plant species from dry habitats of the southern hemisphere.
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z połnocy na południe czyli inwazyjny charakter roży rdzawej Rosa Rubiginosa l
2018Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Tomasz HuraAbstract:Sweet briar (Rosa Rubiginosa L.) is characterized by an unusual course of meiosis, resistance to fungal pathogens and high tolerance to abiotic stresses. It is native to the Northern Hemisphere (Europe, North America, and Asian part of Russia), where it forms small-scale populations. The shrub prefers sunny sites and calcium-rich soils. Rosa Rubiginosa has been introduced to the Southern Hemisphere (South America, Australia, New Zealand), where it is an invasive species capable of displacing native vegetation. In this part of the world it is considered a weed, but it is also a pioneering plant that colonizes areas degraded by ecological disasters and human activity. It protects nearby plant species by providing them with adequate soil and air humidity and light conditions. This paper discusses the huge potential of sweet briar in acclimatization to environmental stresses.
Katarzyna Hura - One of the best experts on this subject based on the ideXlab platform.
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activity of the photosynthetic apparatus in dehydrated leaves of a perennial shrub Rosa Rubiginosa l with different levels of drought memory
2021Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Agnieszka Ostrowska, Tomasz HuraAbstract:Abstract The aim of the study was to analyze the activity of the photosynthetic apparatus during induced dehydration of leaves harvested from perennial shrubs of Rosa Rubiginosa growing at wet and dry sites and differing in the level of drought memory. The markers of drought memory included accumulation of D1 (PsbA) protein, chaperone Cpn60, Rubisco activase (RA), and Rubisco larger subunit (RbcL). The study investigated the levels of soluble carbohydrates and phenolic compounds, of cell wall-bound phenolics, non-enzymatic antioxidants, and assimilation pigments. During induced dehydration, leaves from the dry site exhibited slower water loss and greater activity of the photosynthetic apparatus, particularly in terms of effectiveness of electron transport between PSII and PSI. They also effectively dissipated excessive excitation energy in the form of heat and far-red fluorescence. Higher level of D1 protein in the leaves collected from the dry site was accompanied by lower accumulation of Cpn60, RA and RbcL proteins and considerably higher content of soluble carbohydrates and carotenoids. Drought memory in R. Rubiginosa may be associated with a low level of proteins responsible for photosynthetic fixation of CO2 and reduced content of chlorophyll a and b, and also with enhanced accumulation of D1 protein and soluble carbohydrates and carotenoids.
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phytohormone synthesis pathways in sweet briar rose Rosa Rubiginosa l seedlings with high adaptation potential to soil drought
2020Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:The study aimed to determine the phytohormone profile of sweet briar rose (Rosa Rubiginosa L.) seedlings and privileged synthesis pathways of individual hormones including gibberellins, cytokinins and auxins in response to long-term soil drought. We detected eight gibberellins, nine auxins and fifteen cytokinins. Abscisic acid (ABA) was also detected as a sensitive indicator of water stress. Thirty days of soil drought induced significant increase of ABA content and species-specific quantitative changes of other phytohormones. We established preferred synthesis pathways for three gibberellins, six auxins and eight cytokinins. Both an increase and decrease in gibberellin and cytokinin levels may modulate sweet briar's response to soil water shortage. In the case of auxins, induction of effective adaptation mechanisms to extremely dry environments is mostly triggered by their rising levels. Under drought stress, sweet briar seedlings increased their gibberellin pool at the expense of reducing the pool of cytokinins and auxins. This may indicate a specific role of gibberellins in adaptation mechanisms to long-term soil water deficit developed by sweet briar.
-
physiological traits determining high adaptation potential of sweet briar Rosa Rubiginosa l at early stage of growth to dry lands
2019Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Michal Dziurka, Agnieszka Ostrowska, Tomasz HuraAbstract:Little is known about mechanisms of sweet briar adaptation to dry habitats. The species is highly invasive and displaces native plants from dry lands of the southern hemisphere. This study evaluates physiological basis of Rosa Rubiginosa L. adaptation to soil drought. We performed a pot soil drought experiment and assessed water relations, water use efficiency, gas exchange and photosynthetic apparatus activity. The study also measured the content of chlorophyll, soluble carbohydrates and proline and analyzed plant biomass growth. We hypothesized that the drought stress induced an effective mechanism enabling adaptation of young sweet briar roses to soil water deficit. The study identified several adaptation mechanisms of R. Rubiginosa allowing the plant to survive soil drought. These included limiting transpiration and stomatal conductance, increasing the level of soluble sugars, reducing chlorophyll content, accumulating CO2 in intercellular spaces, and increasing the quantum yield of electron transport from QA− to the PSI end electron acceptors. As a result, young sweet briar roses limited water loss and photoinhibition damage to the photosynthetic apparatus, which translated into consumption of soluble sugars for growth purposes. This study showed that photosynthesis optimization and increased activity of the photosynthetic apparatus made it possible to avoid photoinhibition and to effectively use water and sugars to maintain growth during water stress. This mechanism is probably responsible for the invasive nature of R. Rubiginosa and its huge potential to displace native plant species from dry habitats of the southern hemisphere.
-
z połnocy na południe czyli inwazyjny charakter roży rdzawej Rosa Rubiginosa l
2018Co-Authors: Joanna Gadzinowska, Katarzyna Hura, Bozena Pawlowska, Tomasz HuraAbstract:Sweet briar (Rosa Rubiginosa L.) is characterized by an unusual course of meiosis, resistance to fungal pathogens and high tolerance to abiotic stresses. It is native to the Northern Hemisphere (Europe, North America, and Asian part of Russia), where it forms small-scale populations. The shrub prefers sunny sites and calcium-rich soils. Rosa Rubiginosa has been introduced to the Southern Hemisphere (South America, Australia, New Zealand), where it is an invasive species capable of displacing native vegetation. In this part of the world it is considered a weed, but it is also a pioneering plant that colonizes areas degraded by ecological disasters and human activity. It protects nearby plant species by providing them with adequate soil and air humidity and light conditions. This paper discusses the huge potential of sweet briar in acclimatization to environmental stresses.
-
physiological responses of Rosa Rubiginosa to saline environment
2017Co-Authors: Tomasz Hura, Katarzyna Hura, Bozena Szewczyktaranek, Krzysztof Nowak, Bozena PawlowskaAbstract:The aim of this work was to analyse the response of Rosa Rubiginosa to salinity induced by different concentrations of sodium chloride and calcium chloride (0, 25, 50, 100, 150 and 200 mM). Besides salt accumulation and pH changes, other parameters were investigated including photosynthetic activity, leaf water content, the dynamics of necrosis and chlorosis appearance and leaf drying. The study was complemented with microscopic analysis of changes in leaf anatomy. R. Rubiginosa was more sensitive to the salinity induced by calcium chloride than by sodium chloride. Plant response to salinity differed depending of the salt concentration. These differences were manifested by higher dynamics of necrosis and chlorosis appearance and leaf drying. CaCl2 showed greater inhibition of the photosynthetic apparatus and photosynthetic activity. Treatment with CaCl2 caused more visible deformation of palisade cells, reduction in their density and overall reduction in leaf thickness. The study demonstrated higher accumulation of CaCl2 in the soil, and thus greater limitations in water availability resulting in reduced leaf water content and quicker drying of leaves as compared with NaCl-treated plants.
Amanda Despessailles - One of the best experts on this subject based on the ideXlab platform.
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dietary Rosa mosqueta Rosa Rubiginosa oil prevents high diet induced hepatic steatosis in mice
2015Co-Authors: Amanda Despessailles, Camila G Dossi, Alejandra Espinosa, Daniel Gonzalezmanan, Gladys TapiaAbstract:The effects of dietary Rosa mosqueta (RM, Rosa Rubiginosa) oil, rich in α-linolenic acid, in the prevention of liver steatosis were studied in mice fed a high fat diet (HFD). C57BL/6j mice were fed either a control diet or HFD with or without RM oil for 12 weeks. The results indicate that RM oil supplementation decreases fat infiltration of the liver from 43.8% to 6.2%, improving the hepatic oxidative state, insulin levels, HOMA index, and both body weight and adipose tissue weight of HFD plus RM treated animals compared to HFD without supplementation. In addition, the DHA concentration in the liver was significantly increased in HFD fed mice with RM oil compared to HFD (3 vs. 1.6 g per 100 g FAME). The n-6/n-3 ratio was not significantly modified by treatment with RM. Our findings suggest that RM oil supplementation prevents the development of hepatic steatosis and the obese phenotype observed in HFD fed mice.
