Crop-specific growth promoting effect of native Trichoderma species
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Keywords:Crop specificity, growth promoting potential, native Trichoderma
AbstractThe present study was conducted to explore the occurrence of crop specificity in the growth promoting effect of rhizosphere and rhizoplane resident Trichoderma spp. The isolates from rhizosphere and rhizoplane of healthy wheat, rice and chickpea plants collected from the diseased fields were evaluated for their growth promoting potential in vitro and in glasshouse. The isolates were tested by inoculation in their native crops and by cross-inoculation in other two crops as well. Results revealed that Trichoderma isolates, namely, TRS-R8 (rice), TRP-W8 (wheat) and TRP-C4 (chickpea), exhibited growth promoting effect in all the crops used in the study but performed significantly better in their native crops, measured as seedling vigour index (SVI) and plant vigour index (PVI) as compared to other isolates, standard check (PBAT-1, i.e. strain Th-14) and control. The SVI and PVI for the above isolates were 4115 and 6204, 3865 and 9919, and 5303 and 5212, respectively as compared to 3342 to 4402 and 4863 to 8770 for the standard check. The finally selected promising isolates (TRS-R8, TRPW8 and TRP-C4) were identified as Trichoderma asperellum (=T. viride) by using BiOLOG microstation system.
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