Abstract
The arbuscular mycorrhizal fungal (AMF) communities associated with cacao in Venezuela were studied. The species of AMF spores present in sixteen cacao plantations and in one nursery were isolated and identified when possible. The spore densities, species richness, diversity, Shannon-Wiener diversity index and dominance concentration index for the AMF communities were calculated. Acaulospora scrobiculata was associated with cacao plants in all study sites. No Scutellospora spp. were found in the analyzed soils. The spore number found in cacao plantations was relatively lower as compared with other tropical crops (38 spores 100 g−1 soil up to 1674). Soils that were cultivated with cacao for more than 40 years showed the lowest spore numbers. Species richness and diversity of AMF communities associated with cacao, were negatively correlated with available P in soils. The Shannon-Wiener diversity index was positively correlated with soil organic matter. These results indicate that the traditional cacao cultivation practices used in Venezuela, maintain mycorrhizal infection on cacao plants. The diversity of the AMF community is similar to that found in natural undisturbed ecosystems from Venezuela.
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References
Allen M F and Boosalis M G 1983 Effects of two species of VA mycorrhizal fungi on drought tolerance of winter wheat. New Phytol. 93, 67–76.
An Z Q, Hendrix J W, Hershman D E, Ferriss R S and Henson G T 1993 The influence of crop rotation and soil fumigation on a mycorrhizal fungal community associated with soybean. Mycorrhiza 3, 171–182.
Aranguren J, Escalante G and Herrera R 1982 Nitrogen cycle of tropical perennial crops under shade trees II. Cacao. Plant and Soil 67, 259–269
Azizah-Chulan H and Ragu P 1986 Growth response of Theobroma cacao L. seedlings to inoculation with vesicular-arbuscular mycorrhizal fungi. Plant and Soil 96, 279–285
Barbour M G, Burk J H and Pitts D 1987 Terrestrial Plant Ecology. The Benjamin/Cummings Publ. Co, California, USA. 634 p.
Barea J M, Azcón-Aguilar C, Ocampo J A and Azcón R 1991 Morfología, anatomía y citología de las micorrizas vesículo-arbusculares. In Fijación y Movilización Biológica de Nutrientes (Vol II). Eds. J M Barea and J Olivares. pp 149–173. CSIC, Madrid, Spain.
Bruce A, Smith S E and Tester M 1994 The development of mycorrhizal infection in cucumber: effects of P supply on root growth, formation of entry points and growth of infection units. New Phytol. 127, 507–514.
Cuenca G and DeAndrade Z 1996 Ecology of Glomalean populations in natural and disturbed ecosystems from La Gran Sabana, Venezuela. In Mycorrhizas in integrated Systems from Genes to Plant Development. Eds. C Azcón-Aguilar and J M Barea. pp 89–92. European Commission, Luxembourg.
Cuenca G, Herrera R and Meneses E 1990 Effects of VA mycorrhiza on the growth of cacao seedlings under nursery conditions in Venezuela. Plant and Soil 126, 71–78.
Dodd J C, Arias I, Koomen I and Hayman D S 1990 The management of populations of vesicular-arbuscular mycorrhizal fungi in acid-infertile soils of a savanna ecosystem. II. The effects of pre-crops on the spore populations of native and introduced VAM-fungi. Plant and Soil 122, 241–247.
Ezeta F N and Santos O M 1981 Importancia de endomicorriza na nutricao mineral do cacaueiro. R. Bras. Ci. Solo 5, 22–27.
Giovannetti M and Mosse B 1980 An evaluation of techniques for measuring vesicular-arbuscular mycorrhizal infection in roots. New Phytol. 84, 489–500.
Harley J L and Smith S S 1983 Mycorrhizal Symbiosis. Academic Press, London, UK.
Hepper C and Warner A 1983 Role of organic matter in growth of a vesicular-arbuscular mycorrhizal fungus in soil. Trans. Br. Mycol. Soc. 81, 155–156.
Jackson M L 1976 Analisis Químico del Suelo. Edic Omega SA, Barcelona, Spain.
Jeffries P and Barea J M 1994 Biogeochemical cycling and arbuscular mycorrhizas in the sustainability of plant-soil systems. In Impact of Arbuscular Mycorrhizas on Sustainable Agriculture and Natural Ecosystems. Eds. S Gianinazzi and H Scühepp. Adv. Life Sci. pp 101–115. Birkhäuser Verlag, Basel, Switzerland.
Johnson N C, Pfleger F L, Crookston R K, Simmons S R and Copeland P J 1991 Vesicular-arbuscular mycorrhizas respond to corn and soybean cropping history. New Phytol. 117, 657–663.
Johnson N C, Tilman D and Wedin D 1992 Plant and soil controls on mycorrhizal fungal communities. Ecol. 73, 2034–2042.
Laycock D H 1945 Preliminary investigations into the function of the endotrophic mycorrhiza of Theobroma cacao L. Trop. Agric. XXII, 77–80.
Murphy J and Riley J P 1962 A modified single solution method for the determination of phosphate in natural waters. Anal. Chim. Acta 27, 31–36.
Olsen S R, Cole C V, Watanabe F S and Dean L A 1954 Estimiation of available phosphorus in soils by extraction with sodium bicarbonate. US Dept. Agric. Cir. 939.
Phillps J M and Hayman D S 1970 Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection. Trans. Br. Mycol. Soc. 55, 158–161.
Siegel S 1978 Estadística no paramétrica aplicada a las ciencias de la conducta. Editorial Trillas, Mexico City, Mexico. 346 p.
Sieverding E 1991 Vesicular-Arbuscular Mycorrhiza Management in Tropical Agrosystems. GTZ, Eschborn, Germany.
Siqueira J O, Colozzi-Filho A and Oliveira E 1989 Ocurrencia de micorrizas vesículo-arbusculares em agro e ecossistemas naturais do estado de Minas Gerais. Pesqui. Agropecu. Bras. 24, 1499–1506.
Toro M and Herrera R 1987 Existence of mycorrhizal spores in two different coffee plantations. In Mycorrhizae in the next decade. Eds. D M Sylvia, L L Hung and J H Graham. p. 60 Proc. 7th. NACOM Gainsville, Florida, USA.
Walker C 1992 Systematics and taxonomy of the arbuscular endomycorrhizal fungi (Glomales)—a possible way forward. Agronomie 12, 887–897.
Whittaker R H 1975 Communities and Ecosystems, Second ed. McMillan Publishing Co, Collier MacMillan Publ., New York, London, UK. 385 p.
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Cuenca, G., Meneses, E. Diversity patterns of arbuscular mycorrhizal fungi associated with cacao in Venezuela. Plant Soil 183, 315–322 (1996). https://doi.org/10.1007/BF00011447
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DOI: https://doi.org/10.1007/BF00011447