外源硫化氢处理对板栗幼苗干旱胁迫抗性的影响  

Effect of Exogenous Hydrogen Sulfide on Resistance of Drought Stress of Chestnut Seedlings

作　　者：孙晓莉[1] 张鑫荣 田寿乐[1] 沈广宁[1] 许林[1] 

机构地区：[1]山东省果树研究所,山东泰安271000 [2]东营市垦利区林业局,山东东营257041

出　　处：《北方园艺》2017年第15期7-12,共6页Northern Horticulture

基　　金：山东省农业科学院青年科研基金资助项目(2016YQN29);国家自然科学基金资助项目(31301733;31501742);国家科技支撑计划课题资助项目(2013BAD14B04)

摘　　要：以"黄棚"板栗当年生幼苗为试材,通过水培的方法,研究了15%PEG胁迫下添加0.5、1.0mmol·L^(-1)硫氢化钠(NaHS)对板栗幼苗叶绿素含量、丙二醛(MDA)含量、脯氨酸(Pro)含量及抗氧化酶活性的影响,以研究外源硫化氢调节板栗的抗旱性机制。结果表明:干旱胁迫下,外施NaHS能显著降低板栗幼苗叶片MDA含量,提高叶绿素含量及脯氨酸含量,板栗幼苗叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性显著提高,有效地降低了干旱胁迫下细胞膜受损程度,提高了板栗对干旱逆境的适应性,其中0.5mmol·L^(-1) NaHS浓度处理效果更好。One-year-old seedling of chestnut ‘Huangpeng＇was used as test material,a hydroponic experiment was carried out to study the effects of exogenous hydrogen sulfide at the concentration of 0.5 mmol· L-1 and 1.0 mmol· L-1 on the chlorophyll content under 15% PEG stress,malondialdehyde（MDA）,proline（Pro）and the activities of antioxidant enzymes of chesnut seedlings were studied,to investigate the related mechanisms of exogenous hydrogen sulfide regulation of drought stress of chesnut.The results showed that under drought stress spraying exogenous hydrogen sulfide obviously reduced the content of MDA,and significantly increased the contents of chlorophyll and proline,and the activities of SOD,POD,CAT.The previous evidence showed that exogenous hydrogen sulfide was favorable to decrease the damage degree of cell membrane under drought stress,which enhance the ability of resisting drought stress in chenut leaves.0.5 mmol·L-1 NaHS concentration was better.

关 键 词：板栗 硫氢化钠(NaHS) 干旱胁迫 

分 类 号：S664.204.3[农业科学—果树学]