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ABSTRACT
In order to isolated and identified the bacterial strains from wheat rhizosphere and evaluated the effect of different concentration of bacterial fermentation broth on the wild oats weed growth. This experiment carried out the separation and purification of dominant bacterial strains from the wheat rhizosphere soil, and performed the fermentation broth biological activity assessment by measured the seed germination and plant growth from 20 wheat varieties. The results had shown that the bacterial fermentation broth inhibits the growth of wild oat seedlings and plants to varying degrees, bacterial strains of X3, X4, X8, X12, X16 and X20 has certain level of inhibition activity and X20 has the highest herbicidal effectiveness. According to molecular biology identification, obtained superior bacterial strains X20 was Bacillus as potentially inhibitor for developing of bacterial-based bioherbicides for wild oats weed control management in the wheat field.
Graphical abstract
Highlights
Bacillus was identified as most suppressive effect on wild oat seedling.
Seeds germination was effectively inhibited in X3 (68.75%) and X20 (75%).
Inhibitory effect of bacterial broth on wild oats was decreased with diluted times.
The maximum inhibitory rate of root was 65.90% in 10 time’s diluted time.
Predominant Proteobacteria and Actinobacteria were reduced in weed exist wheat soil.
Acknowledgments
The authors are grateful for the financial support from National Natural Science Foundation of China (No. 31860512), Applied Basic Research of Qinghai Science & Technology Department (No. 2018-ZJ-716), and the National Key R&D Program of China (No. 2016YFD0200504). Thankful to all research staff advice.
Disclosure statement
No potential conflict of interest was reported by the authors.