Elucidate the Effect of Drought Tolerant Microbes (Trichoderma) on Drought Responses of Rice in Bangladesh
Abu Noman Faruq Ahmmed*
Professor and Chairman, Department of Plant Pathology, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
A pot experiment was conducted in Net House at Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh to evaluate seed treatment by different commercial Trichoderma formulations on seed, seedling quality and drought responses of rice following CRD with five replications. Thus, two drought tolerant varieties BRRI dhan 56, 71 and one drought susceptible check variety IR 64 were used and six treatments viz. T1= G-derma (powder), T2 = Bioderma, T3= Recharge, T4= Decoprima, T5 = G-derma (LDS) and T6= Control were considered for this experiment. Soil was sterilized by 2% formalin solutions. Seed related data was recorded on % seed germination, speed of germination (Germination Index), mean germination time (MGT), mean daily germination (MDG), peak value (PV) and germination value (GV). Moreover, data was recorded on seedling growth characteristics viz. number of leaves, number of tillers, plant height, shoot length, root length, fresh shoot and root weight, dry shoot and rood weight, seedling vigor index (SVI) and seedling vegetative vigor (SVV) at different days after sowing. At 35 DAS, drought treatments were given and drought response related data viz. droopy leaf, rolled leaf, drying leaf and drought sensitive scale was recorded at 4, 7, 10 and 13 days drought stress (DDS). The data were varied significantly among the treatments. Considering seed germinations parameters, Decoprima showed best results followed by G-derma (powder) and Bioderma. However, in case of seedling growth, T4= Decoprima showed the highest performance followed by G-derma (LDS) and Recharge. Moreover, the lowest drought responses were observed in Decoprima treated seeds followed by G-derma (LDS) and Recharge. The findings revealed that, seed treatment with Trichoderma can mitigate short duration drought stress in rice plant. No disease was observed in rice seedlings due to sterilization of soils and treatments of seeds.