在热应激下探索促进生长的细菌内生菌和肥料在Oryza sativa L.上的相互作用动态
Wonder Nathi Dlamini1,2,3, Kuo-Pin Yu4,5, Wen-Ching Chen6
1Department of Soil and Environmental Sciences, National Chung-Hsing University, No. 145, Xingda Rd., South Dist, Taichung, 402, Taiwan.
Rice (New York, N.Y.)
|May 7, 2025
概括
内生菌细菌和肥料在热应激下增强了米的生长. 细菌菌株W显著提高了谷物产量和植物生物质,减轻了气候变化的负面影响.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 植物生理学 植物生理学
背景情况:
- 由于气候变化导致的全球气温上升威胁到水生产,这是一种至关重要的主食.
- 内生菌为提高作物弹性和减轻非生物压力提供了一个有希望的途径.
- 高温压力对的生长,产量和生理过程产生负面影响.
研究的目的:
- 调查内菌和肥料在缓解大米 (Oryza sativa L.) 热应激中的有效性.
- 为了确定具有促进植物生长 (PGP) 特性的特定细菌菌株,以提高在热应激下大米产量.
- 为了评估在各种热冲击条件下用内生菌细菌接种的水植物的生理反应.
主要方法:
- 在受控的正常和高温条件下 (40-45°C) 用精选的内性细菌分离物接种种子,并用肥料处理.
- 使用16S rRNA基因测序确定了细菌分离物,并选了PGP特征.
- 在受控室和土壤实验中,大米植物在150天内遭受长期的热应激 (35-40°C).
主要成果:
- 细菌注射,特别是菌株W (Bacillus paralicheniformis),显著增加了的发育,植物生物量和长度.
- 菌株W在热应力下显示新鲜谷物重量增加了50%,干谷物重量在热应力下增加了100%以上.
- 细菌注射导致减少了甲 (MDA) 水平,并增加了氨酸,酸盐和酸含量,表明减轻了透应激.
结论:
- 内生菌,特别是W,N和D菌株,有效地减轻大米的热应激,增强生长和产量.
- 细菌注射刺激了大米植物细胞中的生物活性反应,改善了应激耐受性.
- 特定的内菌和半剂量的NPK肥料的联合应用显示了气候变化下的可持续大米生产的巨大潜力.
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