干旱地区农业研究2017，Vol.35Issue(4)：249-254,6.DOI:10.7606/j.issn.1000-7601.2017.04.38
一氧化氮对水分胁迫下苹果砧木新疆野苹果光合与生理特性的影响
Effects of nitric oxide on photosynthesis and physiological characteristics of apple rootstocks under water stress
摘要
Abstract
The study aims to explore physiological effects of exogenous nitric oxide (nitric oxide,NO) on apple rootstocks under water stress and to clarify the differences of photosynthetic,physiological and biochemical indexes of apple rootstock after different concentrations of exogenous NO treatments.The 10-leaf age of M.sieverii (Ledeb) Roem seedlings were tested as experiment materials,and the pot experiment which combined with artificial water control was carried.In the moderate water stress (water content is 45％ ～ 55％ of the soil field capacity) conditions,after spraying exogenous NO,the photosynthetic rate (Pn) and other photosynthetic characteristic indexs,antioxidant enzymes activity such as SOD and the content of osmotic stress substances such as Pro were measured by pot experiment.Compared with the control,exogenous NO slowed the upward trend of MDA and Pro content,conductivity,intercellular CO2 concentration and POD activity under water stress,and cut the decreasing rate of Pn,stomatal conductance (Gs),transpiration rate (Tr),SOD and CAT activity.It was detected a significant effect of concentration,with 190μ mol· L-1 NO having the largest effect.Pn,Gs,Tr,SOD and CAT activities increased by 28.73％,32.94％,33.33％,14.24％,25.38％;Ci,POD activity,Pro content,REC and MDA contents were decreased by 18.68％,40％,78.72％,49.06 ％,26.47 ％.Appropriate concentrations of NO treatment can activate M.prunifolia seedlings of antioxidant system,protect the cell membrane system and enhanced cell photosynthetic performance under water stress.关键词
水分胁迫/苹果砧木/一氧化氮/光合作用/生理指标Key words
water stress/apple root stock/nitrick oxide/photosynthesis/physiological index分类
农业科技引用本文复制引用
石晓昀,王延秀,姜霄,陈佰鸿,胡亚,朱燕芳,何成勇..一氧化氮对水分胁迫下苹果砧木新疆野苹果光合与生理特性的影响[J].干旱地区农业研究,2017,35(4):249-254,6.基金项目
甘肃省自然科学基金项目(145RJZA167) （145RJZA167）
甘肃省教育厅基本科研业务项目(035-041051) （035-041051）
甘肃省农牧厅生物技术专项项目(035-034070) （035-034070）
