浙江农林大学学报2017，Vol.34Issue(6)：991-998,8.DOI:10.11833/j.issn.2095-0756.2017.06.004
干旱胁迫和复水下不同薄壳山核桃品种的生长和光合特性
Growth and photosynthetic characteristics for pecan cultivars during drought stress and recovery
摘要
Abstract
This study was to determine the changes of water status and photosynthetic characteristics in differ-ent pecan cultivars during drought stress and recovery. Pecan cultivars 'Pawnee' 'Mahan' 'Stuart''Mohawk' 'Jinhua' 'Shaoxing' and 'Zhongshan 25' were selected to consider indicators of photosyn-thetic characteristics, chlorophyll, and water use efficiency (WUE). Results showed that with prolonged drought, net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), relative water content (RWC) and chlorophyll content of all plants decreased. However, water use efficiency for all plants increased gradually reaching a peak on day 17. After 3 d of watering, all these parameters showed signs of recovery. The fastest re-covery rates were 'Pawnee' (Pn had recovered 76.1%) and 'Mahan' (Pn had recovered 69.4%). After water-ing for 8 d, all tested parameters were restored to almost equivalent levels of the control (ck). Drought resis-tance of different pecan cultivars was in the order of 'Mahan' > 'Pawnee' > 'Shaoxing' > 'Zhong-shan 25' > 'Jinhua' > 'Stuart' > 'Mohawk'.关键词
经济林学/薄壳山核桃/干旱胁迫与恢复/光合作用/水分状态Key words
non timber forest products (NTFP)/pecan/drought and recovery/photosynthesis/water status分类
农业科技引用本文复制引用
杨标,刘壮壮,彭方仁,曹凡,陈涛,邓秋菊,陈文静..干旱胁迫和复水下不同薄壳山核桃品种的生长和光合特性[J].浙江农林大学学报,2017,34(6):991-998,8.基金项目
江苏省林业"三新"工程资助项目(LYSX〔2016〕44) （LYSX〔2016〕44）
国家林业局引进国际先进农业科学技术计划(948计划)项目(2015-4-16) （948计划）
