生态学报2018，Vol.38Issue(6)：2082-2091,10.DOI:10.5846/stxb201703080389
多效唑和干旱胁迫对毛竹实生苗活力、光合能力及非结构性碳水化合物的影响
Effects of PP333and drought stress on the activity, photosynthetic characteristics, and non-structural carbohydrates of Phyllostachys edulis seedlings
摘要
Abstract
We investigated the effects of paclobutrazol (PP333) on the chlorophyll,photosynthetic parameters,nonstructural carbohydrates (NSC),C/N ratio,root activity on one-year-old phyllostachys edulis seedlings.Experiments were degined with three water treatments (W1:well-watered with 75％ field capacity;W2:water stress with 50％ FC;W3 water stress with 35％ FC) and two levels of PP333treatments (P1:0mg/L;P2:40mg/L).Results showed that:as the drought increased,leaf color of P.edulis seedlings gradually faded and the concentration of Chla,Chlb,Car,Chla/b and total chl significantly decreased(P＜0.05),Pn,Tr and WUE significantly decreased (P＜0.05),Ls significantly increased (P＜ 0.05),the NSC content in the leaf and root significantly increased (P＜0.05),root activity significantly decreased (P＜ 0.05).When PP333 was applied,the chlorophyll content were significantly increased under both P2W2 and P2W3 treatments relative to P2W1 treatment,but no significant difference was found between P2W2 and P2W3.Also,P2W3 significantly increased Pn by 146.9％ compared with P1W3 treatment,and the total soluble sugar content significantly increased up to 3.41mg/g.Besides,P2W3 significantly increased the total soluble sugar content and the starch content in leaf and root,and root:shoot ratio was significantly increased.Our study demonstrated that PP333 application could effectively improve the drought adaptability of P.edulis seedlings by increasing the root activity and root:shoot ratio,reducing water loss and NSC content,and improving the photosynthetic pigments and photosynthetic capacity.关键词
干旱/多效唑/毛竹/根系活力/光合能力/非结构性碳水化合物(NSC)Key words
drought/PP333/Phyllostachys edulis/root activity/photosynthetic characteristics/non-structural carbohydrate引用本文复制引用
杨丽芝,潘春霞,邵珊璐,陶晨悦,王威,应叶青..多效唑和干旱胁迫对毛竹实生苗活力、光合能力及非结构性碳水化合物的影响[J].生态学报,2018,38(6):2082-2091,10.基金项目
“十三五”国家重大研发计划课题(2016YFD0600901) （2016YFD0600901）
