? Physiological response of four wolfberry (<em>Lycium Linn</em>.) species under drought stress
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    2018, Vol. 17 Issue (03): 603-612     DOI: 10.1016/S2095-3119(17)61754-4
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Physiological response of four wolfberry (Lycium Linn.) species under drought stress
ZHAO Jian-hua1, LI Hao-xia2, ZHANG Cun-zhi3, AN Wei1, YIN Yue1, WANG Ya-jun1, CAO You-long1  
1 National Wolfberry Engineering Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, P.R.China
2 Desertification Control Research Institute, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, P.R.China
3 Ningxia Professional Technology College, Yinchuan 750021, P.R.China
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Abstract We studied gas-exchange, chlorophyll pigments, lipid peroxidation, antioxidant enzymes, and biomass partitioning responses in seedlings of four wolfberry species (Lycium chinense Mill. var. potaninii (Pojark.) A. M. Lu, Lycium chinense Mill., Lycium barbarum L., and Lycium yunnanense Kuang & A. M. Lu) under four water supply regimes.  In all four species, drought affected seedlings in terms of chlorophyll content, net photosynthesis rate (Pn), transpiration rate (E), and lipid peroxidation.  Drought also increased some antioxidant enzyme activities, such as peroxidase (POD), catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX).  Significant changes in dry biomass partitioning also occurred in response to water stress.  In particular, dry biomass of leaves and fruits decreased significantly.  L. chinense Mill. and L. barbarum L. possessed greater drought tolerance and exhibited superior antioxidant processing ability and other related physiological traits compared to the other two species. L. chinense Mill. was the most tolerant to all levels of drought.  In contrast, L. yunnanense Kuang & A. M. Lu was more affected by water supply and had the lowest resistance to drought stress.  These findings would provide some important information regarding genetic resources for future forest tree improvement in relation to drought tolerance. 
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Key words�� drought     Lycium Linn.     chlorophyll fluorescence     osmotic adjustment     antioxidant respond     dry matter allocation     
Received: 2017-03-04; Published: 2017-04-17

This study was financially supported by the National Natural Science Foundation of China (31360191, 31660220), the Natural Science Foundation of Ningxia Hui Autonomous Region, China (NZ16121), and the Self-option and Foundation of Ningxia Academy of Agriculture and Forestry Sciences, China (YES-16-0402, NKYZ-16-0402).

Corresponding Authors: Correspondence ZHAO Jian-hua, E-mail: zhaojianhua0943@163.com   
Cite this article:   
ZHAO Jian-hua, LI Hao-xia, ZHANG Cun-zhi, AN Wei, YIN Yue, WANG Ya-jun, CAO You-long. Physiological response of four wolfberry (Lycium Linn.) species under drought stress[J]. Journal of Integrative Agriculture, 2018, 17(03): 603-612.
http://www.chinaagrisci.com/Jwk_zgnykxen/EN/ 10.1016/S2095-3119(17)61754-4      or     http://www.chinaagrisci.com/Jwk_zgnykxen/EN/Y2018/V17/I03/603
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