干旱胁迫对枣树组培苗生长的影响

Effect of Drought Stress on the Growth of Zizphus jujube in Vitro

在组培条件下,研究了不同浓度的聚乙二醇(PEG-6000)胁迫对木枣(Zizyphus jujube millMUZAO)和骏枣(Zizyphus jujube millJUNZAO)组培苗生长的影响。结果表明:随胁迫浓度的提高,苗木高生长增量呈现下降趋势,叶片数量生长表现出先促进后抑制,但叶片受害程度逐渐增加,分蘖数增加呈现出先升后下降趋势,表明适当的胁迫有利于芽的分蘖。

Zixphus jujubein vitro cultivars,Muzao and JUNZAO were treated byl0,15,20 and 25% concentration of PEG-6000. Effectsof drought stresson the growth of Zizphus jujubein vitro were studied. Theexperimental results showed that, with the intensive of stress, increments numbers increased first then decreased, but damage of cultivars height decreased and increments of cultivars leaf level of cultivar leaves gradually increased. Moreover, with the development of stress, numbers of tillers increased first then decreased. The later result showed that moderate stress was beneficial to the tiller of Zizphus jujube bud.