Enhancing the NaCl Tolerance Potential of Wheat on Root Morphology and Osmoregulation Substance by Exogenous Application of Bacillus subtilis QM3

摘要

Bacillus subtilis QM3 is a strain of antagonistic strains which have biological control function. Salinity is the most important limiting plant factor for agriculture development and growth changes in wheat. The present study was carried out to test tolerance involved in salt stress alleviation in wheat (Triticum aestivum L.) through the root application of B. subtilis QM3. Experiment was performed after germinating for two days. Wheat root was first grown under B. subtilis QM3 with four levels (108 CFU/ml B. sutilis QM3 (M1), 107 CFU/ml B. subtilis QM3 (M2), 106 CFU/ml B. subtilis QM3 (M3) and 105 CFU/ml B. subtilis QM3 (M4)), then poured with saline regime of NaCl of six concentrations (50, 100, 150, 200, 250, 300 mmol/L) compared along with control. The results of present study showed that B. subtilisQM3 clearly promoted the growth of the root morphology and the content of osmoregulation substance (p 6 CFU/ml B. subtilis QM3 (M3) was found to be very effective in mitigation of NaCl stress by?promoting the growth of the wheat root and adjusting the content of osmoregulation substance in wheat root.