NaCl胁迫对丁香‘瓷蓝’光合作用及叶绿素荧光的影响  

NaCl Stress on Photosynthesis and Chlorophyll Fluorescence of Syringa 'Wedgewood Blue'

作　　者：魏永阳 林云弟 巩素霞 杨志莹[1] 邱玉宾[1] 

机构地区：[1]潍坊市农业科学院,山东潍坊261041 [2]淄博市农业科学研究院,山东淄博255033

出　　处：《中国农学通报》2016年第16期93-97,共5页Chinese Agricultural Science Bulletin

基　　金：国家林业局948项目"丁香新品种及培育技术引进"(2014-4-69);山东省农业良种工程重点课题"北美高端园林观赏植物引种筛选及产业化开发"[鲁科农字(2011)186号]

摘　　要：为研究NaCl胁迫对丁香‘瓷蓝’光合作用的影响,以‘瓷蓝’的一年生扦插苗为试材,对不同浓度NaCl胁迫下‘瓷蓝’的叶绿素含量、光合特性及叶绿素荧光参数等进行研究。结果表明:盐胁迫使得光合性能降低,并且随着盐浓度的增加,叶绿素含量、光化学猝灭系数(q P)、PSⅡ的实际光化学效率(ΦPSⅡ)和PSⅡ最大光化学量子产量(Fv/Fm)呈下降趋势。非光化学猝灭系数(NPQ)呈先增加后下降趋势。光合速率下降的主要原因为气孔限制。‘瓷蓝’的耐盐范围在0.4%以下,在盐浓度低于0.4%时会通过提高非光化学猝灭系数(NPQ)来抵抗胁迫造成的伤害,当盐浓度高于0.4%时其光合机构受损严重,产生严重光抑制。To study NaCl stress on Syringa‘Wedgewood Blue＇photosynthesis, we took 1-year-old seedlingsof‘Wedgewood Blue＇as test materials to study their photosynthesis, chlorophyll content and chlorophyllfluorescence under different concentrations of NaCl. The results showed that salt stress inhibited thephotosynthesis. The chlorophyll content, q P, ΦPS Ⅱand Fv/Fm reduced with the increase of salt concentration,NPQ increased at first and then exhibited a decline. The main reason for photosynthesis reduction was stomatallimitation. The salt tolerance range of‘Wedgewood Blue＇was below 0.4%. When the salt concentration wasbelow 0.4%, the plant could improve the NPQ to resist the damage. When the salt concentration was higherthan 0.4%, its photosynthetic organization was severely damaged, which resulted in serious photoinhibition.

关 键 词：丁香'瓷蓝’ 盐胁迫 光合作用 叶绿素荧光 

分 类 号：S685.26[农业科学—观赏园艺]