Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela
The effects of vesicular-arbuscular mycorrhizae inoculation on the growth of cacao seedlings (Theobroma cacao var. Ocumare 60) grown for 5 months in a nursery were studied. The effects of introduced VAM fungi (Glomus occultum, Acaulospora appendicula, Glomus manihotis, Acaulospora morrowae and Scutellospora pellucida) in soils treated with copper oxychloride or methyl bromide, were compared with the indigenous VAM and with their respective non-inoculated controls. Cacao seedlings responded well to indigenous VAM fungi, which included Scutellospora calospora as the dominant species, inducing increases significant in height, dry weight and foliar uptake of P, Cu and Zn in relation to the sterile control. G. occultum and A. appendicula increased the height of cacao seedlings but to an extent not yet statistically significant through the duration of the experiment. The methyl bromide sterilization induced the lowest Cu and Zn uptake in the cacao seedlings but this effect was ameliorated with VAM inoculation. Manifest deficiency symptoms were not observed in the treatments. Copper oxychloride treatment depressed growth to the same level as the sterile control although its residual effects did not kill VAM. It could change the competitive relations among the VAM species and in this case seemed to affect adversely the more efficient native fungi. The influence of the presence and long permanence of large cotyledons in cacao on the results obtained is discussed.
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Subjects: | THEOBROMA CACAO, PLANTULAS, MICORRIZAS ARBUSCULARES VESICULARES, VIVEROS, INOCULACION, GLOMUS, ACAULOSPORA, COMPUESTO ORGANICO DEL COBRE, BROMURO DE METILO, ETAPAS DE DESARROLLO DE LA PLANTA, VENEZUELA, |
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KOHA-OAI-BVE:714282022-07-29T19:59:01ZEffects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela 60325 Cuenca, G. Herrera, R. 77715 93544 Meneses, E. Ago 1990The effects of vesicular-arbuscular mycorrhizae inoculation on the growth of cacao seedlings (Theobroma cacao var. Ocumare 60) grown for 5 months in a nursery were studied. The effects of introduced VAM fungi (Glomus occultum, Acaulospora appendicula, Glomus manihotis, Acaulospora morrowae and Scutellospora pellucida) in soils treated with copper oxychloride or methyl bromide, were compared with the indigenous VAM and with their respective non-inoculated controls. Cacao seedlings responded well to indigenous VAM fungi, which included Scutellospora calospora as the dominant species, inducing increases significant in height, dry weight and foliar uptake of P, Cu and Zn in relation to the sterile control. G. occultum and A. appendicula increased the height of cacao seedlings but to an extent not yet statistically significant through the duration of the experiment. The methyl bromide sterilization induced the lowest Cu and Zn uptake in the cacao seedlings but this effect was ameliorated with VAM inoculation. Manifest deficiency symptoms were not observed in the treatments. Copper oxychloride treatment depressed growth to the same level as the sterile control although its residual effects did not kill VAM. It could change the competitive relations among the VAM species and in this case seemed to affect adversely the more efficient native fungi. The influence of the presence and long permanence of large cotyledons in cacao on the results obtained is discussed.The effects of vesicular-arbuscular mycorrhizae inoculation on the growth of cacao seedlings (Theobroma cacao var. Ocumare 60) grown for 5 months in a nursery were studied. The effects of introduced VAM fungi (Glomus occultum, Acaulospora appendicula, Glomus manihotis, Acaulospora morrowae and Scutellospora pellucida) in soils treated with copper oxychloride or methyl bromide, were compared with the indigenous VAM and with their respective non-inoculated controls. Cacao seedlings responded well to indigenous VAM fungi, which included Scutellospora calospora as the dominant species, inducing increases significant in height, dry weight and foliar uptake of P, Cu and Zn in relation to the sterile control. G. occultum and A. appendicula increased the height of cacao seedlings but to an extent not yet statistically significant through the duration of the experiment. The methyl bromide sterilization induced the lowest Cu and Zn uptake in the cacao seedlings but this effect was ameliorated with VAM inoculation. Manifest deficiency symptoms were not observed in the treatments. Copper oxychloride treatment depressed growth to the same level as the sterile control although its residual effects did not kill VAM. It could change the competitive relations among the VAM species and in this case seemed to affect adversely the more efficient native fungi. The influence of the presence and long permanence of large cotyledons in cacao on the results obtained is discussed.THEOBROMA CACAOPLANTULASMICORRIZAS ARBUSCULARES VESICULARESVIVEROSINOCULACIONGLOMUSACAULOSPORACOMPUESTO ORGANICO DEL COBREBROMURO DE METILOETAPAS DE DESARROLLO DE LA PLANTAVENEZUELAPlant and Soil (Países Bajos) |
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THEOBROMA CACAO PLANTULAS MICORRIZAS ARBUSCULARES VESICULARES VIVEROS INOCULACION GLOMUS ACAULOSPORA COMPUESTO ORGANICO DEL COBRE BROMURO DE METILO ETAPAS DE DESARROLLO DE LA PLANTA VENEZUELA THEOBROMA CACAO PLANTULAS MICORRIZAS ARBUSCULARES VESICULARES VIVEROS INOCULACION GLOMUS ACAULOSPORA COMPUESTO ORGANICO DEL COBRE BROMURO DE METILO ETAPAS DE DESARROLLO DE LA PLANTA VENEZUELA |
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THEOBROMA CACAO PLANTULAS MICORRIZAS ARBUSCULARES VESICULARES VIVEROS INOCULACION GLOMUS ACAULOSPORA COMPUESTO ORGANICO DEL COBRE BROMURO DE METILO ETAPAS DE DESARROLLO DE LA PLANTA VENEZUELA THEOBROMA CACAO PLANTULAS MICORRIZAS ARBUSCULARES VESICULARES VIVEROS INOCULACION GLOMUS ACAULOSPORA COMPUESTO ORGANICO DEL COBRE BROMURO DE METILO ETAPAS DE DESARROLLO DE LA PLANTA VENEZUELA 60325 Cuenca, G. Herrera, R. 77715 93544 Meneses, E. Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
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The effects of vesicular-arbuscular mycorrhizae inoculation on the growth of cacao seedlings (Theobroma cacao var. Ocumare 60) grown for 5 months in a nursery were studied. The effects of introduced VAM fungi (Glomus occultum, Acaulospora appendicula, Glomus manihotis, Acaulospora morrowae and Scutellospora pellucida) in soils treated with copper oxychloride or methyl bromide, were compared with the indigenous VAM and with their respective non-inoculated controls. Cacao seedlings responded well to indigenous VAM fungi, which included Scutellospora calospora as the dominant species, inducing increases significant in height, dry weight and foliar uptake of P, Cu and Zn in relation to the sterile control. G. occultum and A. appendicula increased the height of cacao seedlings but to an extent not yet statistically significant through the duration of the experiment. The methyl bromide sterilization induced the lowest Cu and Zn uptake in the cacao seedlings but this effect was ameliorated with VAM inoculation. Manifest deficiency symptoms were not observed in the treatments. Copper oxychloride treatment depressed growth to the same level as the sterile control although its residual effects did not kill VAM. It could change the competitive relations among the VAM species and in this case seemed to affect adversely the more efficient native fungi. The influence of the presence and long permanence of large cotyledons in cacao on the results obtained is discussed. |
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THEOBROMA CACAO PLANTULAS MICORRIZAS ARBUSCULARES VESICULARES VIVEROS INOCULACION GLOMUS ACAULOSPORA COMPUESTO ORGANICO DEL COBRE BROMURO DE METILO ETAPAS DE DESARROLLO DE LA PLANTA VENEZUELA |
author |
60325 Cuenca, G. Herrera, R. 77715 93544 Meneses, E. |
author_facet |
60325 Cuenca, G. Herrera, R. 77715 93544 Meneses, E. |
author_sort |
60325 Cuenca, G. |
title |
Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
title_short |
Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
title_full |
Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
title_fullStr |
Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
title_full_unstemmed |
Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela |
title_sort |
effects of va mycorrhiza on the growth of cacao seedlings under nursery conditions in venezuela |
publishDate |
Ago |
work_keys_str_mv |
AT 60325cuencag effectsofvamycorrhizaonthegrowthofcacaoseedlingsundernurseryconditionsinvenezuela AT herrerar77715 effectsofvamycorrhizaonthegrowthofcacaoseedlingsundernurseryconditionsinvenezuela AT 93544menesese effectsofvamycorrhizaonthegrowthofcacaoseedlingsundernurseryconditionsinvenezuela |
_version_ |
1756057516086657025 |