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在温度上升下的玉米作物:细菌对热量诱导的生物化学和脂质变化的影响

Ricardo Pinto¹, Paulo Cardoso¹, Bruno Carneiro²

¹CESAM-Centre for Environmental and Marine Studies and Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal.

Plants (Basel, Switzerland)

|August 28, 2025

概括

促进植物生长的细菌 (PGPB) 通过改善热应激下的发芽,生长和抗氧化防御来增强玉米的耐热性. 用Pantoea sp进行注射. 缓解了膜损伤和恢复了脂质,提高了耐热性.

科学领域:

植物科学
微生物学
生物化学

背景情况:

全球气温上升会影响植物的生长,
植物增长促进细菌 (PGPB) 提供增强作物耐热性的潜力,但机制尚不清楚.

研究的目的:

在受控和热应激条件下对Zea mays (玉米) 进行PGPB接种的影响.
在热应激下探索PGPB诱导的形态,生化和脂质变化.

主要方法:

用耐热PGPB菌株 (Pantoea sp.) 接种了玉米种子在控制 (26°C) 和热应力 (36°C) 条件下.
使用形态测量,生化 (氧化应激标志物) 和脂质分析评估植物性能.

主要成果:

热应激减少了35.9%的发芽,并增加了氧化应激标志物 (LPO,SOD,GPx).
潘托亚种类接种改善了15%的热应激种子发芽,增强了生长 (芽+28%,根+17%),增强了抗氧化酶 (CAT,APx),并减少了65%的膜损伤.
脂质分析显示PGPB注射减轻了热引起的变化,降低了三糖和保存关键脂质,导致与对照植物相似的特征.

结论:

接种PGPB,特别是Pantoea sp.,显著提高了玉米的耐热性.
这种策略改善了植物生长,抗氧化能力和在热应激下膜完整性.
在面对气候变暖时,PGPB是一种可行的方法来提高作物弹性.

关键词:

其他国家生物化学状态热应力脂质概况植物与微生物的相互作用可持续的农业热耐受性

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