生存平衡:野生番茄和养番茄的干旱反应比较
Yaniv Lupo1, Menachem Moshelion2
1The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel; French Associates Institute for Agriculture and Biotechnology of Drylands, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boker, Israel.
Plant science : an international journal of experimental plant biology
|November 22, 2023
概括
化番茄在干旱下表现出更高的水损失和增长,而野生番茄则表现出更好的用水效率. 在番茄植物中,化优先考虑了性能,而不是生理水资源的保护.
科学领域:
- 植物生理学 植物生理学
- 干旱应激反应 干旱应激反应
- 植物育种 植物育种
背景情况:
- 植物的可塑性允许适应干旱等环境变化.
- 口腔反应是影响水损失和二氧化碳吸收的关键特征.
- 了解野生和养物种之间的差异对于改善作物至关重要.
研究的目的:
- 为了比较化 (S. lycopersicum cv. 之间的干旱压力反应. M82) 和野生 (S. pennellii) 番茄物种.
- 在干旱条件下调查化对生理和形态特征的影响.
主要方法:
- 植物在半受控的温室条件下在功能表型化平台 (FPP) 中培养.
- 测量了关键的生理参数,包括透气率 (E),口腔导电率 (gs),光合作用率 (An) 和rubisco活性 (Vcmax).
- 评估了生物质,叶面积和土壤水含量 (SWC).
主要成果:
- 与野生番茄相比,化番茄的透气率 (E) 和口腔导电率 (gs) 较高,但光合作用率 (An) 类似.
- 野生番茄表现出更高的最大鲁比斯科活性 (Vcmax),这表明使用水的效率更高.
- 化番茄具有更大的生物质和叶面积,导致更早的干旱暴露,而野生番茄保持了更高的土壤水位和稳定的口腔导电性.
结论:
- 番茄的化似乎有利于形态和解剖学性能特征,而不是生理用水效率.
- 野生番茄物种具有有利于在干旱压力下节水的特征.
- 这些发现对提高干旱抗性番茄的育种有意义.
相关概念视频
02:41Responses to Drought and Flooding
10.7K
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.
10.7K
01:57Adaptations that Reduce Water Loss
25.6K
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.
25.6K
02:45Responses to Heat and Cold Stress
13.5K
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.
13.5K
02:04Regulation of Transpiration by Stomata
28.3K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
28.3K
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