失水对猕猴桃新生根ABA含量和活性的影响

Effects of water losing on ABA content and activity in Actinidia chinensis Planch. new roots

以2年生中华猕猴桃(A ctinidia chinensis Planch.)的根系为试验材料,通过自然失水和PEG(聚乙二醇)6000处理,研究了失水过程中吸收根和延长根的内源ABA和根系活性变化。结果表明,吸收根的内源ABA浓度及水分胁迫下ABA积累量均高于延长根;失水过程中,延长根根系活力先升后降,而吸收根根系活性则从开始就一直下降。

The changes of ABA concentration a roots activity in extensive roots and absorbing roots of two-year-old Actinidia chinensis Planch, were investigated during water losing caused by either PEG osmosis or natural desiccation. The results showed that the ABA content in absorbing roots was higher than in absorbing roots was higher than in extensive roots. During water losing, extensive roots activity increased first and deceased afterwards. From the beginning, absorbing roots activity has always been reduced.