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Evaluation of the effects of spores and their heat-treated residues from different Bacillus strains on the initial growth of rice plants

机译:从不同芽孢杆菌菌株对水稻初始生长的评价孢子及其热处理残留物的影响

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摘要

This study evaluated the effects of the spores and their heat-treated residues from different strains of Bacillus species (B. pumilus, B. altitudinis, and B. megaterium) on the early growth of paddy rice cultivars, including Hitomebore (short-grain japonica rice), Takanari (high-yielding indica rice), and two new lines, TULK-143-6 and LTAT-29. The spores of seven Bacillus strains positively affected Hitomebore root growth, while, the root volume of TULK-143-6 with inoculation of B. pumilus TUAT1 and JM52, and root length and root surface area of LTAT-29 with inoculation of B. megaterium MAFF301694 were increased significantly. In contrast with Hitomebore, Takanari root growth was significantly inhibited by the spores of six Bacillus strains. Surprisingly, inoculations with the spore residues from all tested Bacillus strains increased the root dry weight of Hitomebore, with the effects of four bacterial strains being significant. Furthermore, there were more Bacillus spores than vegetative cells at different time points during the initial rice growth stage, and most plant samples mainly consisted of Bacillus spores. Thus, the spores of Bacillus species likely promote rice root development.
机译:该研究评估了孢子和其热处理残留物的影响来自芽孢杆菌(B.Pumilus,B. Altitudinis和B. MegiSium)的不同菌株的稻米品种早期生长(包括Hitomebore)(短谷期粳稻米饭),Takanari(高产籼稻)和两条新线,Tulk-143-6和LTAT-29。七个芽孢杆菌的孢子菌株积极地影响了Hitomebore根生长,而Tulk-143-6的根部体积具有接种B.umilus Tuat1和JM52的LTAT-29的根部长度和根表面积,具有接种B. Megirlium Maff301694显着增加。与Hitomebore相比,Takanari根生长受到六个芽孢杆菌菌株的显着抑制。令人惊讶的是,与来自所有测试的芽孢杆菌菌株的孢子残基接种增加了HitomeBore的根系干重,其效果为四种细菌菌株显着。此外,在初始水稻生长阶段的不同时间点的植物细胞上有更多的芽孢杆菌孢子,并且大多数植物样本主要由孢子孢子组成。因此,芽孢杆菌物种的孢子可能促进水稻根系发育。

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