不同供锌水平对葡萄生理生化指标的影响

Effects of Different Zn^(2+) Concentration on Physiological and Biochemical Indexes of Grape Grafting Seedlings

通过室内盆栽试验,研究了不同的锌浓度处理对3年生葡萄嫁接苗(康拜尔)生理特性的影响。结果表明,适宜葡萄生长的最佳锌浓度范围为220~450 mg/L,缺锌和高浓度的锌处理均不利于葡萄生长。高浓度的锌处理对葡萄叶片伤害大,影响叶绿素的合成;在220~450 mg/L锌处理下总叶绿素、叶绿素a、叶绿素b含量与无锌处理间差异不显著,类胡萝卜素含量也最高,有利于葡萄的光合作用;随着锌浓度的升高,根系活力呈现先升后降的趋势,MDA的含量呈先低后高的趋势,在锌浓度为220~450 mg/L时,根系活力显著高于其他供锌水平,MDA则比无锌处理低;而当供锌水平低于220 mg/L和大于450 mg/L时,MDA的含量显著上升,POD和PPO的活性显著下降,均不利于植株生长。

The pot experiment was used to study effects of different Zn2＋ concentration on physiological and biochemical indexes of rape grafting seedlings with 3-year age.The results showed that the optimum Zn2＋ concentration for treating grape grafting seedlings was 220～450mg/L,high Zn2＋ concentration affected chlorophyll synthesis of grape grafting seedlings,there was no significant difference in content of total chlorophyll,chlorophyll a and chlorophyll b between grape grafting seedlings treated with 220～450mg/L Zn2＋ concentration and CK.The root vigor of grape grafting seedlings treated with Zn2＋ solution presented a trend of first rise and later descent and the MDA content presented a first low and later high trend with increment of Zn2＋ concentration.The root vigor of grape grafting seedlings treated with 220～450mg/L Zn2＋ concentration significantly higher than other treatments and the MDA content was lower than CK.The MDA content of grape grafting seedlings treated with less than 220mg/L or more than 450 mg/L increased and its POD and PPO activity reduced significantly,which was harmful to seedling growth.