较低的相对空气湿度和增加的口腔密度独立地阻碍了年轻Arabidopsis的生长
Ingmar Tulva1, Kaspar Koolmeister1,2, Hanna Hõrak1
1Institute of Technology, University of Tartu, Nooruse 1, 50411, Tartu, Estonia.
The Plant journal : for cell and molecular biology
|July 29, 2024
概括
改变植物口腔密度和灵敏度会影响气体交换和生长,特别是在低湿度下. 高口腔密度会影响生长,但这种影响可能会在植物生命后期发生变化.
科学领域:
- 植物生理学 植物生理学
- 植物解剖学 植物解剖学
背景情况:
- 胃孔调节二氧化碳吸收和水损失,影响光合作用,用水效率和植物生长.
- 牙密度的变化可以根据环境条件对植物性能产生不同的影响.
研究的目的:
- 研究增加的口腔密度和高口腔灵敏度对植物气体交换,口腔解剖学和在不同空气湿度下生长的综合影响.
- 确定这些口腔特征如何相互作用并影响植物对不同湿度制度的反应.
主要方法:
- 使用了具有结合增加的口腔密度 (epf1,epf2) 和高口腔灵敏度 (ht1-2,cyp707a1/a3) 的阿拉比多普西斯菌株.
- 在不同的空气湿度水平下评估气体交换,口腔解剖学和植物生长.
主要成果:
- 增加的口腔密度导致了更高的口腔导电性,在高口腔灵敏度突变者中效果减弱.
- 低空气湿度增加了口腔比率,将更多的口腔分配给向性表皮.
- 低相对空气湿度和高口腔密度都独立地影响了植物生长;更高的蒸发需求并没有加剧高口腔密度的负面影响.
结论:
- 高口腔密度对年轻植物生长的有害影响可能与口腔生产的代谢成本有关.
- 未来的研究应该探讨高口腔密度是否会在植物后期发育阶段带来好处.
相关概念视频
Regulation of Transpiration by Stomata
28.1K
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.
28.1K
Responses 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
Adaptations that Reduce Water Loss
25.4K
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.
25.4K
Responses 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
Responses 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
Transcription
146.8K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
146.8K


