Prominence of mycorrhizal colonization and diversity in weed species growing in agronomic field of naldurg, india

Udhav Narba Bhale

In present study, 12 species belonging to 8 families and 11 genera in rabi and 14 weed species belonging to 9 families and 13 genera in kharif season were collected from agricultural field and examined arbuscular mycorrhizal fungi (AMF) status. AMF root colonization ranged from 41.56to 84.0%. The highest colonization was recorded in Dichanthium caricosum (84.0%) while least in Abelomoscus manihot (41.56%) in rabi season. In case of kharif, AMF root colonization ranged from 50- 85.12%. The more colonization was noted in Cassia tora (85.12%) and Celosia argentea (81.25%) while least in
Cyprus rotundus (50%). Eight weed species were found common in both the seasons and assessed for AMF. Of the eight species, five species i.e. Parthenium hysterophorus, Corchorus capsularis, Cyprus rotundus, Cyanodon dactylon and Dichanthium caricosum recorded higher AM colonization in rabi season as compared to kharif. AMF spores densityvaried in weed species and ranged from 287-1070 spores/100g soil in rabi while 245- 770/100g soil in kharif season. Mycorrhizal spore density was found more in rabi than kharif
season. During the kharif season, highest root colonization was recorded in three plant species viz.,Commelina benghalensis,C. albescens and Celosia argentea compared to rabi season. Vesicular, arbuscular, hyphal and dark septate endophytes types of root colonization was recorded in both seasons. Celosia argentea, Abutilon indicum and Alternenthera sessilis
found DSE types of colonization only. Six species of AM fungi i.e. Acaulospora rehmii, Glomus macrocarpum, Glomus microaggregatum, Glomus delicata, Glomus geosporum and
Sclerocystis sp. (unidentified) were identified.

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