EFFECTS OF MERCURIC-CHLORIDE ON THE HYDRAULIC CONDUCTIVITY OF TOMATO ROOT SYSTEMS - EVIDENCE FOR A CHANNEL-MEDIATED WATER PATHWAY

被引：193

作者：

MAGGIO, A ^{[1
]}

JOLY, RJ ^{[1
]}

机构：

[1] PURDUE UNIV, DEPT HORT, W LAFAYETTE, IN 47907 USA

来源：

PLANT PHYSIOLOGY | 1995年 / 109卷 / 01期

关键词：

D O I：

10.1104/pp.109.1.331

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A pressure-flux approach was used to evaluate the effects of HgCl2 on water transport in tomato (Lycopersicon esculentum) roots. Addition of HgCl2 to a root-bathing solution caused a large and rapid reduction in pressure-induced root water flux; the inhibition was largely reversible upon addition of beta-mercaptoethanol. Root system hydraulic conductivity was reduced by 57%. There was no difference between treatments in the K+ concentration in xylem exudate. The results are consistent with the presence of a protein-mediated path for transmembrane water flow in tomato roots.

引用

页码：331 / 335

页数：5

共 31 条

[1]

BACIC G, 1987, J EXP BOT, V38, P1284, DOI 10.1093/jxb/38.8.1284

[2] AQUAPORINS - THE MOLECULAR-BASIS OF FACILITATED WATER-MOVEMENT THROUGH LIVING PLANT-CELLS [J].