对土壤微生物群的持续遗留影响促进了植物对干旱的适应反应
bioRxiv : the preprint server for biology
|September 10, 2024
概括
土壤微生物适应干旱,创造了一个"干旱遗产". 这种遗产有助于本地植物,但不是玉米,通过改变植物基因表达和用水,应对新的干旱条件.
科学领域:
- 土壤微生物学 土壤微生物学
- 植物生理学 植物生理学
- 生态生态学 生态生态学
背景情况:
- 慢性和急性干旱显著改变土壤微生物群落,选择具有增强生存特征的微生物.
- 适应干旱的土壤微生物群可以影响植物的用水效率,但分子和生理机制在很大程度上是未知的.
- 了解这个问题的理解
研究的目的:
- 研究土壤微生物干旱遗产如何影响植物对干旱的反应.
- 为了确定微生物分类对建立土壤干旱记忆至关重要.
- 为了确定干旱遗留效应是否在本地和养植物物种之间存在差异.
主要方法:
- 从不同的降水梯度收集土壤,以评估干旱遗产.
- 控制土壤的特性,如孔隙性和元素组成.
- 实施实验性干旱并分析植物基因表达和用水效率.
主要成果:
- 确定了特定的细菌种群,对土壤干旱记忆形成至关重要.
- 证明微生物干旱遗产能够抵御短期干旱干扰.
- 观察到,历史上干旱的气候微生物群保护了原生野生草,但不是玉米,免受急性干旱的影响.
- 发现干旱遗留的微生物群改变了与透气和用水效率相关的宿主基因表达.
结论:
- 长期干旱暴露塑造了土壤微生物群落,创造了持久的"遗留效应".
- 这些遗留效应显著影响植物的干旱耐受性,对本地物种和养物种产生差异性影响.
- 微生物干旱遗产影响植物的分子反应,影响干旱压力下的用水和透气.
相关概念视频
02:41Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
02:11The Roles of Bacteria and Fungi in Plant Nutrition
35.1K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.1K
02:02Responses to Salt Stress
13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
01:57Adaptations that Reduce Water Loss
25.2K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.2K
02:23The Soil Ecosystem
19.7K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
19.7K
02:45Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K