The Experts below are selected from a list of 161340 Experts worldwide ranked by ideXlab platform
A Roldan - One of the best experts on this subject based on the ideXlab platform.
-
establishment of two ectomycorrhizal shrub species in a semiarid site after in situ amendment with sugar beet rock phosphate and aspergillus niger
Microbial Ecology, 2005Co-Authors: Francisco Caravaca, M M Alguacil, P Torres, Javier Parladé, Rosario Azcón, A RoldanAbstract:A field experiment was carried out to assess the effectiveness of the addition of sugar beet, rock phosphate, and Aspergillus niger directly into the planting hole, and the mycorrhizal inoculation of seedlings with Scleroderma verrucosum, for promotion of plant growth of Cistus albidus L. and Quercus coccifera L. and enhancement of Soil physicochemical, biochemical, and biological properties, in a degraded semiarid Mediterranean area. One year after planting, the available phosphorus content in the amended Soils of both species was about fourfold higher than in the nonamended Soil. Amendment addition increased the aggregate stability of the rhizosphere of C. albidus (by 56% with respect to control Soil) while the mycorrhizal inoculation increased only the aggregate stability of the rhizosphere of Q. coccifera (by 13% with respect to control Soil). Biomass C content and enzyme activities (dehydrogenase, urease, protease-BAA, acid phosphatase, and β-glucosidase) of the rhizosphere of C. albidus were increased by amendment addition but not by mycorrhizal inoculation. Both treatments increased enzyme activities of the rhizosphere of Q. coccifera. The mycorrhizal inoculation of the seedlings with S. verrucosum was the most effective treatment for stimulating the growth of C. albidus (by 469% with respect to control plants) and Q. coccifera (by 74% with respect to control plants). The combined treatment, involving mycorrhizal inoculation of seedlings and addition of the amendment directly into Soil, had no additive effect on the growth of either shrub species.
-
comparing the effectiveness of mycorrhizal inoculation and amendment with sugar beet rock phosphate and aspergillus niger to enhance field performance of the leguminous shrub dorycnium pentaphyllum l
Applied Soil Ecology, 2004Co-Authors: Francisco Caravaca, M M Alguacil, Rosario Azcón, Gisela Diaz, A RoldanAbstract:A field experiment was undertaken to evaluate the effectiveness of mycorrhizal inoculation with Glomus intraradices (Schenck & Smith) or Glomus deserticola (Trappe, Bloss. & Menge) and the addition of sugar beet (SB), rock phosphate and Aspergillus niger with respect to the establishment of Dorycnium pentaphyllum L. seedlings, in a semiarid Mediterranean area, and the improvement of the physical-chemical, biochemical and biological properties of the Soil. Eighteen months after planting, amended Soil had higher available phosphorus and aggregate stability levels than control Soil (165 and 157%, respectively). All assayed treatments had higher Soil total carbohydrates and water soluble C values and enzyme activities (dehydrogenase, urease, acid phosphatase and β-glucosidase), and lower Soil pH and bulk density than control Soil. Biomass C and dehydrogenase, urease and β-glucosidase activities of the rhizosphere of G. deserticola-inoculated plants were higher than those of the rhizosphere of G. intraradices-inoculated plants. Mycorrhizal inoculation treatments stimulated significantly the production of shoot Biomass, to a higher extent than the addition of the amendment alone to Soil or the combined treatment. The highest levels of mycorrhizal colonisation and of foliar N and K were recorded in the seedlings inoculated with G. deserticola. The shoot Biomass of G. deserticola-inoculated D. pentaphyllum plants was greater (about 219% with respect to control plants) than that of G. intraradices (about 116% with respect to control plants).
Francisco Caravaca - One of the best experts on this subject based on the ideXlab platform.
-
establishment of two ectomycorrhizal shrub species in a semiarid site after in situ amendment with sugar beet rock phosphate and aspergillus niger
Microbial Ecology, 2005Co-Authors: Francisco Caravaca, M M Alguacil, P Torres, Javier Parladé, Rosario Azcón, A RoldanAbstract:A field experiment was carried out to assess the effectiveness of the addition of sugar beet, rock phosphate, and Aspergillus niger directly into the planting hole, and the mycorrhizal inoculation of seedlings with Scleroderma verrucosum, for promotion of plant growth of Cistus albidus L. and Quercus coccifera L. and enhancement of Soil physicochemical, biochemical, and biological properties, in a degraded semiarid Mediterranean area. One year after planting, the available phosphorus content in the amended Soils of both species was about fourfold higher than in the nonamended Soil. Amendment addition increased the aggregate stability of the rhizosphere of C. albidus (by 56% with respect to control Soil) while the mycorrhizal inoculation increased only the aggregate stability of the rhizosphere of Q. coccifera (by 13% with respect to control Soil). Biomass C content and enzyme activities (dehydrogenase, urease, protease-BAA, acid phosphatase, and β-glucosidase) of the rhizosphere of C. albidus were increased by amendment addition but not by mycorrhizal inoculation. Both treatments increased enzyme activities of the rhizosphere of Q. coccifera. The mycorrhizal inoculation of the seedlings with S. verrucosum was the most effective treatment for stimulating the growth of C. albidus (by 469% with respect to control plants) and Q. coccifera (by 74% with respect to control plants). The combined treatment, involving mycorrhizal inoculation of seedlings and addition of the amendment directly into Soil, had no additive effect on the growth of either shrub species.
-
comparing the effectiveness of mycorrhizal inoculation and amendment with sugar beet rock phosphate and aspergillus niger to enhance field performance of the leguminous shrub dorycnium pentaphyllum l
Applied Soil Ecology, 2004Co-Authors: Francisco Caravaca, M M Alguacil, Rosario Azcón, Gisela Diaz, A RoldanAbstract:A field experiment was undertaken to evaluate the effectiveness of mycorrhizal inoculation with Glomus intraradices (Schenck & Smith) or Glomus deserticola (Trappe, Bloss. & Menge) and the addition of sugar beet (SB), rock phosphate and Aspergillus niger with respect to the establishment of Dorycnium pentaphyllum L. seedlings, in a semiarid Mediterranean area, and the improvement of the physical-chemical, biochemical and biological properties of the Soil. Eighteen months after planting, amended Soil had higher available phosphorus and aggregate stability levels than control Soil (165 and 157%, respectively). All assayed treatments had higher Soil total carbohydrates and water soluble C values and enzyme activities (dehydrogenase, urease, acid phosphatase and β-glucosidase), and lower Soil pH and bulk density than control Soil. Biomass C and dehydrogenase, urease and β-glucosidase activities of the rhizosphere of G. deserticola-inoculated plants were higher than those of the rhizosphere of G. intraradices-inoculated plants. Mycorrhizal inoculation treatments stimulated significantly the production of shoot Biomass, to a higher extent than the addition of the amendment alone to Soil or the combined treatment. The highest levels of mycorrhizal colonisation and of foliar N and K were recorded in the seedlings inoculated with G. deserticola. The shoot Biomass of G. deserticola-inoculated D. pentaphyllum plants was greater (about 219% with respect to control plants) than that of G. intraradices (about 116% with respect to control plants).
M M Alguacil - One of the best experts on this subject based on the ideXlab platform.
-
establishment of two ectomycorrhizal shrub species in a semiarid site after in situ amendment with sugar beet rock phosphate and aspergillus niger
Microbial Ecology, 2005Co-Authors: Francisco Caravaca, M M Alguacil, P Torres, Javier Parladé, Rosario Azcón, A RoldanAbstract:A field experiment was carried out to assess the effectiveness of the addition of sugar beet, rock phosphate, and Aspergillus niger directly into the planting hole, and the mycorrhizal inoculation of seedlings with Scleroderma verrucosum, for promotion of plant growth of Cistus albidus L. and Quercus coccifera L. and enhancement of Soil physicochemical, biochemical, and biological properties, in a degraded semiarid Mediterranean area. One year after planting, the available phosphorus content in the amended Soils of both species was about fourfold higher than in the nonamended Soil. Amendment addition increased the aggregate stability of the rhizosphere of C. albidus (by 56% with respect to control Soil) while the mycorrhizal inoculation increased only the aggregate stability of the rhizosphere of Q. coccifera (by 13% with respect to control Soil). Biomass C content and enzyme activities (dehydrogenase, urease, protease-BAA, acid phosphatase, and β-glucosidase) of the rhizosphere of C. albidus were increased by amendment addition but not by mycorrhizal inoculation. Both treatments increased enzyme activities of the rhizosphere of Q. coccifera. The mycorrhizal inoculation of the seedlings with S. verrucosum was the most effective treatment for stimulating the growth of C. albidus (by 469% with respect to control plants) and Q. coccifera (by 74% with respect to control plants). The combined treatment, involving mycorrhizal inoculation of seedlings and addition of the amendment directly into Soil, had no additive effect on the growth of either shrub species.
-
comparing the effectiveness of mycorrhizal inoculation and amendment with sugar beet rock phosphate and aspergillus niger to enhance field performance of the leguminous shrub dorycnium pentaphyllum l
Applied Soil Ecology, 2004Co-Authors: Francisco Caravaca, M M Alguacil, Rosario Azcón, Gisela Diaz, A RoldanAbstract:A field experiment was undertaken to evaluate the effectiveness of mycorrhizal inoculation with Glomus intraradices (Schenck & Smith) or Glomus deserticola (Trappe, Bloss. & Menge) and the addition of sugar beet (SB), rock phosphate and Aspergillus niger with respect to the establishment of Dorycnium pentaphyllum L. seedlings, in a semiarid Mediterranean area, and the improvement of the physical-chemical, biochemical and biological properties of the Soil. Eighteen months after planting, amended Soil had higher available phosphorus and aggregate stability levels than control Soil (165 and 157%, respectively). All assayed treatments had higher Soil total carbohydrates and water soluble C values and enzyme activities (dehydrogenase, urease, acid phosphatase and β-glucosidase), and lower Soil pH and bulk density than control Soil. Biomass C and dehydrogenase, urease and β-glucosidase activities of the rhizosphere of G. deserticola-inoculated plants were higher than those of the rhizosphere of G. intraradices-inoculated plants. Mycorrhizal inoculation treatments stimulated significantly the production of shoot Biomass, to a higher extent than the addition of the amendment alone to Soil or the combined treatment. The highest levels of mycorrhizal colonisation and of foliar N and K were recorded in the seedlings inoculated with G. deserticola. The shoot Biomass of G. deserticola-inoculated D. pentaphyllum plants was greater (about 219% with respect to control plants) than that of G. intraradices (about 116% with respect to control plants).
Rosario Azcón - One of the best experts on this subject based on the ideXlab platform.
-
establishment of two ectomycorrhizal shrub species in a semiarid site after in situ amendment with sugar beet rock phosphate and aspergillus niger
Microbial Ecology, 2005Co-Authors: Francisco Caravaca, M M Alguacil, P Torres, Javier Parladé, Rosario Azcón, A RoldanAbstract:A field experiment was carried out to assess the effectiveness of the addition of sugar beet, rock phosphate, and Aspergillus niger directly into the planting hole, and the mycorrhizal inoculation of seedlings with Scleroderma verrucosum, for promotion of plant growth of Cistus albidus L. and Quercus coccifera L. and enhancement of Soil physicochemical, biochemical, and biological properties, in a degraded semiarid Mediterranean area. One year after planting, the available phosphorus content in the amended Soils of both species was about fourfold higher than in the nonamended Soil. Amendment addition increased the aggregate stability of the rhizosphere of C. albidus (by 56% with respect to control Soil) while the mycorrhizal inoculation increased only the aggregate stability of the rhizosphere of Q. coccifera (by 13% with respect to control Soil). Biomass C content and enzyme activities (dehydrogenase, urease, protease-BAA, acid phosphatase, and β-glucosidase) of the rhizosphere of C. albidus were increased by amendment addition but not by mycorrhizal inoculation. Both treatments increased enzyme activities of the rhizosphere of Q. coccifera. The mycorrhizal inoculation of the seedlings with S. verrucosum was the most effective treatment for stimulating the growth of C. albidus (by 469% with respect to control plants) and Q. coccifera (by 74% with respect to control plants). The combined treatment, involving mycorrhizal inoculation of seedlings and addition of the amendment directly into Soil, had no additive effect on the growth of either shrub species.
-
comparing the effectiveness of mycorrhizal inoculation and amendment with sugar beet rock phosphate and aspergillus niger to enhance field performance of the leguminous shrub dorycnium pentaphyllum l
Applied Soil Ecology, 2004Co-Authors: Francisco Caravaca, M M Alguacil, Rosario Azcón, Gisela Diaz, A RoldanAbstract:A field experiment was undertaken to evaluate the effectiveness of mycorrhizal inoculation with Glomus intraradices (Schenck & Smith) or Glomus deserticola (Trappe, Bloss. & Menge) and the addition of sugar beet (SB), rock phosphate and Aspergillus niger with respect to the establishment of Dorycnium pentaphyllum L. seedlings, in a semiarid Mediterranean area, and the improvement of the physical-chemical, biochemical and biological properties of the Soil. Eighteen months after planting, amended Soil had higher available phosphorus and aggregate stability levels than control Soil (165 and 157%, respectively). All assayed treatments had higher Soil total carbohydrates and water soluble C values and enzyme activities (dehydrogenase, urease, acid phosphatase and β-glucosidase), and lower Soil pH and bulk density than control Soil. Biomass C and dehydrogenase, urease and β-glucosidase activities of the rhizosphere of G. deserticola-inoculated plants were higher than those of the rhizosphere of G. intraradices-inoculated plants. Mycorrhizal inoculation treatments stimulated significantly the production of shoot Biomass, to a higher extent than the addition of the amendment alone to Soil or the combined treatment. The highest levels of mycorrhizal colonisation and of foliar N and K were recorded in the seedlings inoculated with G. deserticola. The shoot Biomass of G. deserticola-inoculated D. pentaphyllum plants was greater (about 219% with respect to control plants) than that of G. intraradices (about 116% with respect to control plants).
S J Kerley - One of the best experts on this subject based on the ideXlab platform.
-
the biology of mycorrhiza in the ericaceae xx plant and mycorrhizal necromass as nitrogenous substrates for the ericoid mycorrhizal fungus hymenoscyphus ericae and its host
New Phytologist, 1998Co-Authors: S J Kerley, David ReadAbstract:In the ‘F’ horizons of acid mor-humus Soils of heathland ecosystems, mycorrhizal roots of the dominant ericaceous species form a large fraction of the Soil Biomass. Rapid turnover of these roots provides the potential for recycling of substantial amounts of nitrogen contained in their fungal and plant components. Here, we first determine the amount of N in the Biomass of ericoid roots growing in heathland and show it to constitute a large proportion of total Soil N. In order to assess the accessibility of this N to ericaceous plants, experiments were then conducted using aseptically produced shoot and root necromass of Vaccinium macrocarpon Ait., the roots being grown with or without mycorrhizal colonization. These materials were provided as sole nitrogenous substrates in growth experiments using the ericoid mycorrhizal fungus Hymenoscyphus ericae (Read) Korf & Kernan in pure culture and V. macrocarpon in the mycorrhizal (M) or non-mycorrhizal (NM) condition as test organisms. The experiments were designed to test the hypothesis that the N contained in these substrates can be mobilized by the mycorrhizal endophyte. The ability of the endophyte to utilize the substrates was determined by measuring fungal yields and by assessing the presence of its extra-cellular protease and chitinase enzymes. Transfer of N to the host by the endophyte was determined through measurements of plant yield and tissue N contents. H. ericae produced a significantly greater yield on shoot and mycorrhizal root necromass than on non-mycorrhizal root necromass. The extra-cellular enzymes protease and chitinase were produced by the fungus when grown on the M root necromass. The fungus also transferred N to the host plant, up to 76% of N contained in the substrate being found in M plants whereas less than 5% was present in their NM counterparts.
-
the biology of mycorrhiza in the ericaceae xviii chitin degradation by hymenoscyphus ericae and transfer of chitin nitrogen to the host plant
New Phytologist, 1995Co-Authors: S J Kerley, David ReadAbstract:In acid mor-humus Soils of heathland ecosystems fungi are a significant part of the Soil Biomass. In these organic Soils chitin and hyphal wall hexosamines are major potential sources of nitrogen (N). The ability of the ericoid mycorrhizal fungus Hymenoscyphus ericae (Read) Korf & Kernan to degrade purified chitin and the hexosamines, N-acetylglucosamine, glucosamine and galactosamine when supplied as sole sources of N, was investigated in aseptic liquid culture. The fungus grew rapidly on all the organic N sources, producing the largest dry weight increase when supplied with galactosamine and similar yields on the other nitrogenous sources. Mycelial N contents of fungus grown on the hexosamines reflected the dry weight yields with the fungus grown on galactosamine having the highest N content. After 20 d only trace quantities of N-acetylglucosamine and glucosamine were present in culture filtrate, and 15% of the galactosamine remained at the final harvest. Plants of Vaccinium macrocarpon Ait. and Calluna vulgaris (L.) Hull were grown aseptically in the mycorrhizal or non-mycorrhizal condition on agar media containing chitin or a hexosamine and compared with yields and N contents in the absence of an N source. It was revealed that significant quantities of N were transferred to the host in the mycorrhizal condition that led to enhanced growth rates. The highest yields of V. macrocarpon were observed with N-acetylglucosamine, with the other hexosamines giving yields slightly below that on chitin. The yields were reflected in the calculation of the percentage of available substrate present in the plant ; up to 40% of the N-acetylglucosamine was present in the plants after 40 d.