摘要
在渗透势为－０．５和－１．０ＭＰａＰＥＧ处理下，不抗旱的郑引一号小麦根ＰＭＨ＋－ＡＴＰａｓｅ活性分别下降４５％和６５％，抗旱品种陕合六号则增加了１１％和１２％。小麦根组织Ｈ＋分泌与ＰＭＨ＋－ＡＴＰａｓｅ活性的变化趋势基本一致，即随着胁强增加，郑引一号Ｈ＋分泌下降，陕合六号Ｈ＋分泌是先升高后略降。Ｎａ３ＶＯ４和ＤＣＣＤ对Ｈ＋分泌有不同程度的抑制，品种之间没有明显的差异。外源电子受体Ｆｅ（ＣＮ）６３－的加入促进了小麦根Ｈ＋分泌，陕合六号增加２５％－３９％，郑引一号增加２１％－４５％。与此同时，Ｎａ３ＶＯ４没有表现出对Ｈ＋分泌的抑制作用。
The plasma membrane(PM) H+-ATPase activity decreased 45% and 65% respectily in wheat roots of Zhengyin No. 1 (drought-sensitive). and increased 11 % and 12% in Shaanhe No. 6 (drought resistance) under -0. 5 and -1. 0MPa PEG of ostmotic potential treatment. The H+ extrusion was consistented with varying trends of PM H+-ATPase activity in wheat roots. That is, with water stress strength going up,the H+ extrusion dropped in Zhengyin No. 1 and increased firstly and thn reduced slightly in Shaanhe No. 6. It was inhibitedat different degrees to H+ extrusion by Na3VO4 and DCCD. There was no difference significantly between cultivars. The Fe(CN)63- of electron acceptor in vitro stimulated H+ extrusion in wheat roots,There has been increased 25-39% in Shaanhe No. 6 and 21%-45% in Zhengyin No. 1. It was not inhibited to H+ extrusion by Na3VO4 at same time.
出处
《西北植物学报》
CAS
CSCD
北大核心
1996年第2期101-106,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
农业部"八五"重点研究课题
