摘要
以1年生"富士"苹果苗(砧木为"平邑甜茶")为试材,通过盆栽试验,研究了干旱胁迫过程中叶面喷施甜菜碱对苹果幼树叶片中叶绿素、可溶性蛋白质、脯氨酸、可溶性糖、电解质外渗和丙二醛(MDA)含量以及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性的影响。结果表明:干旱胁迫过程中,喷施甜菜碱预处理有效缓解了叶绿素和可溶性蛋白质含量的下降,增加了脯氨酸和可溶性糖的含量;改善了苹果的水分状况;抗氧化酶活性也显著增强,膜脂过氧化程度减弱;叶面喷施甜菜碱提高了苹果幼树的抗旱性。
Taking one-year-old ＇Fuji＇ apple trees as materials （with ＇Malus hupehensis＇ as rootstock）, the ellect of spraying glycinebetaine on content of chlorophyll,soluble protein content,soluble sugar content, electrolyte leakage rate, MDA content and antioxidant enzyme activity（SOD activity,CAT activity） were studied under drought stress by pot experience. The results showed that exogenous glycinebetaine（GB） alleviated the decreases of chlorophyll and soluble protein,increased the protine content and soluble sugar accumulation in apple leaves during drought stress,ameliorated the water condition;meanwhile, increased the SOD and CAT activities, decreased the MDA content and cell membrane permeability,so the drought resistance of apple young tree was improved.
出处
《北方园艺》
CAS
北大核心
2014年第12期10-14,共5页
Northern Horticulture
基金
山东省自然科学基金资助项目(ZR2011CM034)
关键词
甜菜碱
苹果
干旱胁迫
生理响应
glycinebetaine （GB）
apple
drought stress
physiological response
