文献类型：期刊文献

英文题名：SALIX VIMINALIS MALES MAINTAIN HIGHER PHOTOSYNTHETIC CAPACITY THAN FEMALES UNDER HIGH TEMPERATURE STRESS

作者：Zhai, Fei-Fei[1,2,3] Zhang, Yun-Xing[1] Li, Hai-Dong[1] Mao, Jin-Mei[2,3,4] Li, Zhen-Jian[2,3] Liu, Jun-Xiang[2,3] Qian, Yong-Qiang[2,3] Han, Lei[2,3] Sun, Zhen-Yuan[2,3]

第一作者：Zhai, Fei-Fei

通信作者：Sun, ZY[1];Sun, ZY[2]

机构：[1]Henan Polytech Univ, Sch Architectural & Artist Design, Jiaozuo 454000, Henan, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[3]State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[4]Xinjiang Acad Forestry, Res Inst Econ Forest, Urumqi 830063, Peoples R China

年份：2020

卷号：52

期号：6

起止页码：1965-1971

外文期刊名：PAKISTAN JOURNAL OF BOTANY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000579758700010)】；

基金：The results of this research presented here were financially supported by the National Natural Science Foundation of China (31700533), the Central Public interest Scientific Institution Basal Research Fund (CAFYBB2018ZB002), the Key Technologies R&D Program of Henan Province (182102310052 and 192102310307), and the Doctoral Scientific Fund Project of Henan Polytechnic University (B2017-40).

语种：英文

外文关键词：Chlorophyll fluorescence; Gas exchange; High temperature; Photosynthetic pigment; Sexual differences

摘要：Sexual-specific photosynthetic responses to high temperature stress were investigated in the dioecious species, Salix viminalis. The males and females of S. viminalis were cultivated for 7 weeks in greenhouse, afterwards they were processed to high temperature in climate box. Half of the plants were exposed to 40 degrees C/30C (day/night temperature) which increased stepwise (5 degrees C every 48 h), while the other half were maintained at 25 degrees C/15 degrees C served as a control. Seven days later, photosynthetic physiological parameters in leaves of S. viminalis were analysed. The high temperature treatment caused significant reduction of net photosynthetic rate (P-N) in S. viminalis, but male plants showed obviously higher P-N than female plants. The F-v/F-m value was relatively stable and no obvious difference was detected between male and female plants, indicating the photosynthetic light reaction was not inhabited and both male and female plants possess functional PS II under high temperature. In photosynthetic carbon cycle, the activity of Rubisco declined and the higher activity of the enzyme in males than females revealed that inhibition of photosysthesis occurred and the photosysthesis in males were less inhibited under high temperature. In addition, Carotenoids (Car) content increased and the content of male plants was higher than that of females, which stated that the high temperature could cause photoprotective response and the photoprotection ability were stronger for males. These fmdings suggest that male plants of S. viminalis could maintain higher photosynthetic capacity under high temperature stress, thus male plants should be selected when breeding heat-resistance species according to photosynthetic parameters.