Studies on dynamics of AM fungal association and spore density in Elettaria cardamomum Maton. (small cardamom)

Kannan, V.R.; Dhanapal, K.; Thomas, J.; Udayan, K.

Journal of Plantation Crops 34(3): 489-493

2006


ISSN/ISBN: 0304-5242
Accession: 017160009

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Abstract
Relationship between environmental factors and AM mycorrhizal variation in the rhizosphere of the E. cardamomum was studied. The soils were acidic in nature and organic carbon ranged between 2.2 to 4.6%. The extent of root colonization by AM fungi in E. cardamomum ranged between 19.0 to 86.1 and was found to be maximum during February and minimum during July. The total AMF spore number varied from 18.66 to 67.00 g-1/soil. The number of spores in E. cardamomum was maximum during June and minimum during September. Acaulospra sp., Gigaspora sp., Glomus aggregatum, G. fasciculatum, G. intraradices were the spore types recorded from the rhizosphere of E. cardamomum at Thadiyankudisai. Temperature was significantly and positively correlated with EC and negatively with soil N. Rainfall was correlated significantly to soil P and negatively to temperature. Soil moisture was correlated positively to %RLH and %RLC pertaining to mycorrhizas. Rainfall also significantly correlated with %RLA and negatively with spore density. Percent root length hyphae (RLH) were significantly positively correlated with %RLC.