AQPs和碳代谢表达与木质部栓塞修复的关系  

Relationship between Carbon Metabolism and Aqps Expression and Xylem Embolization Repair

作　　者：赵梅 

机构地区：[1]浙江师范大学生命科学学院,浙江 金华

出　　处：《植物学研究》2024年第1期86-92,共7页Botanical Research

摘　　要：木质部的管道分子是植物生长发育是植物运输水分的主要通道,干旱发生以后会使植物木质部形成栓塞和空穴,进一步阻碍或者阻断水分子的运输,使植物失水死亡。木质部导管的栓塞和修复是植物在张力下处理水分运输的内在能力。虽然木质部栓塞的形成是一个非生物过程,但在压力梯度下重新填充需要生物活性来提供能量和水,以恢复木质部运输能力。导管“新的再充水”是人们认同的栓塞修复机制,但它是一个需要能量代谢和精细协调的生理学过程,涉及木质部溶质和水分的运输。水通道蛋白AQPs是一种在细胞膜上面的蛋白,它能控制着水分的进出,进而调节植物体内水分的平衡。非结构性碳水化合物具有能量代谢和渗透调节等功能,并且为防御化合物的合成或与参与营养获取或防御的共生体进行交换提供底物。近年来,随着对于木质部栓塞恢复的研究成为植物耐旱性研究的热点,关于水通道蛋白和碳代谢与栓塞修复关系的研究很多。据此,本文结合近年来的研究对木质部栓塞修复与水通道蛋白和非结构性碳之间的关系进行简单的阐述。Fast and efficient recovery from water stress is a key determinant of plant adaptation to changing. The main channels of water transport in plants are xylem conduit molecules (ducts or tracheids), which can be obstructed or blocked by embolization and cavitation in xylem under drought stress. Embolization and filling of xylem vessels is the inherent ability of plants to handle water transport under tension. Although the formation of xylem embolism is an abiotic process, refilling at a pres-sure gradient requires biological activity to provide energy and water to restore xylem transport capacity. The embolization of the catheteris a physiological process requiring energy metabolism and fine coordination, involving starch hydrolysis, solute and water transport. Aquaporins (AQPS) are proteins on the cell membrane that control the flow of water in and out of plants, thus regulat-ing the water balance in plants. In recent years, the study of xylem embolism recovery has become a hot topic in the study of drought tolerance of plants, and there are many studies on the relationship between aquaporin and carbon metabolism and embolism repair. Therefore, the relationship be-tween xylem embolization repair and aquaporin and non-structural carbon was briefly described in this paper.

关 键 词：栓塞修复 AQPS 碳代谢 栓塞 

分 类 号：R73[医药卫生—肿瘤]