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植物根向水性反应研究进展

来源：花匠小妙招时间：2025-05-18 03:10

摘要： 根的向水性生长是指植物通过根尖感知土壤中的水分梯度, 向着水势较高区域生长的一种生物学特性, 这一特性对植物从土壤中有效获取水分极为重要。植物向水性研究已成为当前植物学研究的热点领域, 但对于调控这一生理反应的分子机制仍知之甚少。目前的研究表明, MIZ1和GNOM作为植物向水性反应的重要调节因子, 正向调控植物根的向水性生长。此外, 植物激素、光、ROS及钙离子也参与调节植物的向水性反应。该文将从向水性的研究历史、调控基因以及内外因素等方面进行阐述, 便于读者全面了解植物向水性研究进展, 以期为向水性研究提供新思路。

关键词: 向水性, 向水性反应, 水分梯度, MIZ1, GNOM

Abstract: Plant root tips can sense the moisture gradient in soil and grow toward the higher water potential region. This unique response is called the hydrotropic response or hydrotropism. Hydrotropism plays a key role for plants to efficiently obtain water from soil. The root hydrotropic response has become one of the hot topics in plant biology. However, the detailed molecular mechanisms controlling the root hydrotropic response are poorly understood. Previous studies de- monstrated that MIZ1 and GNOM can positively regulate the hydrotropic response. Several phytohormones, light, ROS and Ca2+ were also thought to mediate the root hydrotropic response, but their detailed molecular mechanisms are not yet elucidated. This review highlights the research history and factors of hydrotropic response and identification and characterization of key regulators of hydrotropic response, to give a more comprehensive understanding of research progress in the plant hydrotropic response. We provide perspectives on possible future research directions.

Key words: hydrotropism, hydrotropic response, moisture gradient, MIZ1, GNOM