摘要
研究了我国香蕉主栽品种巴西蕉幼苗在短期干旱胁迫和复水情况下叶和根有关生理指标的变化。结果表明:干旱胁迫下,巴西蕉幼苗叶片质膜透性和MDA含量与对照相比显著提高,脯氨酸和可溶性蛋白含量显著增加,SOD和POD活性显著提高,根系活力显著下降。复水后,3个胁迫程度下巴西蕉幼苗叶片质膜透性和MDA含量得到不同程度的恢复,与干旱胁迫相比显著下降;脯氨酸和可溶性蛋白含量、SOD和POD活性与对照相比显著提高;根系活力3个胁迫程度得到不同程度的恢复,其中轻度胁迫恢复最好,且比常温对照显著升高。表明抗旱锻炼提高了巴西蕉幼苗的抗旱性。
The changes of short-term drought stress and rewatering in leaves＇ and roots＇ physiological characteristics of Brazil banana plantlet,which is the major banana variety in China,had been studied.The purpose of the experiment was to provide the theoretical basis for the drought resistance cultivation and breeding of banana.The experimental results showed that treatment of drought stress could increase significantly leaves plasmamembrane permeability and MDA content of Brazil banana plantlet,enhance significantly the content of proline and soluble protein,increase significantly SOD and POD activities and reduce significantly roots vigor compared with the control.Otherwise,the treatment of rewatering could decrease significantly leaves plasmamembrane permeability and MDA content in different degrees under three stress levels of Brazil banana,compared with the stress.After rewatering,the content of proline and soluble protein as well as SOD and POD activities in leaves were improved remarkably as compared with the control;roots vigor recovered in different degrees,of which light stress to recover the best.Roots vigor under light stress were significantly higher than that under room temperature.It implied that the drought resistance of Brazil banana plantlet was strengthened after drought acclimation.
出处
《热带作物学报》
CSCD
2010年第8期1362-1367,共6页
Chinese Journal of Tropical Crops
基金
国家自然科学基金项目(No.30860170)
海南省自然科学基金项目(No.80652
30708)
海南省教育厅高等学校科学研究项目(No.Hj2008-39)
农业部公益性行业科研经费项目(No.nyhyzx07-029)资助
关键词
巴西蕉
干旱胁迫
复水
生理指标
Brazil banana
Drought Stress
Rewatering
Physiological characters
