由于长期变暖而导致的土壤微生物组会影响地下植物的表现
C Le Noir de Carlan1,2, E Verbruggen1, L Colaert-Sentenac1,3
1Biology Department, Plants and Ecosystems (PLECO), University of Antwerp, Antwerp, Belgium.
Plant biology (Stuttgart, Germany)
|January 20, 2026
概括
全球变暖通过改变土壤微生物影响植物. 对土壤微生物的长期变暖影响减少了地下植物生物量,特别是在干旱期间,突出显示了微生物对气候变化影响的调解.
科学领域:
- 生态生态学 生态生态学
- 植物科学 植物科学
- 微生物学 微生物学
背景情况:
- 全球变化,包括变暖,通过环境修改直接和间接地影响植物的性能.
- 土壤微生物在植物健康方面发挥着至关重要的作用,但对变暖很敏感,这使得对变暖对植物的直接或间接影响的评估变得复杂.
- 在实地研究中,区分对植物的直接变暖影响和由土壤微生物群落转移中介的间接影响是具有挑战性的.
研究的目的:
- 研究不同时间地热变暖条件下的土壤微生物如何影响两个草种 (Agrostis capillaris和Anthoxanthum odoratum) 的表现.
- 区分变暖对植物的直接影响与由土壤微生物群落介导的间接影响.
- 评估温暖条件下的土壤微生物对干旱条件下的植物抗压力的影响,并分析相关的根系相关真菌群落.
主要方法:
- 使用环境,中期 (14年) 和长期 (>55年) 地热变暖条件下的土壤进行受控温室实验.
- 在正常灌和干旱压力下监测Agrostis capillaris和Anthoxanthum odoratum的植物性能 (地面和地下生物量).
- 对土壤注射剂进行元编码分析,以识别和量化根相关真菌及其在不同变暖模式下的相对丰度.
主要成果:
- 长期变暖 (LTW) 条件下的土壤中种植的植物显示,这两种物种的地下生物量都减少了.
- 在干旱条件下,对地下生物质的负面影响加剧了Agrostis capillaris的负面影响.
- 观察到地面和地下生物质比率的增加,这与假定植物病原体和状菌根真菌的相对丰富性相吻合.
结论:
- 土壤微生物显著调解全球变暖对植物性能的影响,主要是通过减少地下生物质.
- 长期的气候变暖暴露会改变土壤微生物群,这可能会对植物生长产生负面影响,特别是在干旱等压力严重的条件下.
- 土壤微生物群落的变化,包括病原体和树菌丰度的变化,是气候变暖影响植物地下发展的关键机制.
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