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.
Main Authors: | 60325 Cuenca, G., Herrera, R. 77715, 93544 Meneses, E. |
---|---|
Format: | biblioteca |
Published: |
Ago
|
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, |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Efectividad de cepas de hongos formadores de micorrizas (vesículo-arbusculares) en interacción con niveles de suelo: humus de lombriz, en el desarrollo de posturas de cafeto
by: Sánchez, Cecilia 115659, et al.
Published: (2001) -
Nutrient uptake and growth of cocoa fertilized with rock phosphate and inoculated with Acaulospora delicata and Glomus fasciculatum
by: 131357 Widiastuti, H., et al.
Published: (Oct ) -
Determinación de la efectividad de diferentes especies de hongos formadores de MVA, en vitroplantas de banano (Musa AAA) clon Valery
by: 44143 Arias Tenorio, F., et al.
Published: (1996) -
Identificación de especies dominantes de hongos micorriza vesículo arbusculares (MVA) en agroecosistemas bananeros del caribe de Costa Rica
by: 127623 Vargas Vargas, R., et al.
Published: (1996) -
Ocurrencia y distribución de hongos en micorriza vesicular-arbuscular en plantaciones de café (Coffea arabica L.) en la región central del estado de Sao Paulo, Brasil
by: Lopes, E.S, et al.
Published: (1983-10)