Water Transport and Aquaporins in Grapevine
Water Transport and Aquaporins in Grapevine
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DOI：
10.1007/978-94-017-2308-4_10
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Delrot;S. Picaud;J. Gaudillère
中科院分区：
文献类型：
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作者：
S. Delrot;S. Picaud;J. Gaudillère
水在植物中的主要功能是填充共生体(Cosgrove，1993)，携带溶质，并通过蒸发来平衡太阳能。所有这些功能都涉及水在隔室之间短距离或长距离的移动。通常情况下，这些运动遵循欧姆定律，并由穿过结构的水势梯度控制，该结构形式上类似于电阻(或电导的倒数，Van de Honert，1948)。Smart和Coombe(1983)以前曾回顾过葡萄藤中的基本水分关系。对葡萄中的短距离路径进行定量测量的情况很少见。缺乏关于组织结构和膜电导率的明确信息来记录从皮层到中柱的局部根吸收步骤，生长组织中的水分关系需要进一步研究。然而，很明显，水通道蛋白是一种介导跨膜水运输的蛋白质，可能在不同细胞和器官的水分状况中发挥重要作用。
The main functions of water in plants are to fill the symplast (Cosgrove, 1993), to carry solutes and to balance solar energy by evaporation. All these functions involve water movement between compartments for short or long distances. Typically these movements obey Ohm’s law and are controlled by a gradient of water potential crossing a structure formally analogous to a resistance (or the reciprocal, conductance, Van de Honert, 1948). Basic water relations in grapevines have been previously reviewed by Smart and Coombe (1983). Quantitative measurements for the short distance path in grapevine are rare. Clear information is lacking on the tissue structure and membrane conductivity to document the local root absorption step from the cortex to the stele, and water relations in growing tissues such as root tip, shoot apex and berries require further study. Yet, it is clear that aquaporins, which are proteins mediating transmembrane water transport, probably play an important part in the water status of the different cells and organs.