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    2019, Vol. 18 Issue (01): 83-95     DOI: 10.1016/S2095-3119(18)62011-8
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Growth and physiological responses of four kiwifruit genotypes to salt stress and resistance evaluation
ZHONG Yun-peng, QI Xiu-juan, CHEN Jin-yong, LI Zhi, BAI Dan-feng, WEI Cui-guo, FANG Jin-bao
Key Laboratory for Fruit Tree Growth, Development and Quality Control, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, P.R.China
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Abstract 
In this study, four genotypes (Acva-1, Acva-2, Acva-3 and ZM-2) of Actinidia germplasm resources were grown in different NaCl concentrations (0, 0.4, 0.8 and 1.2 g L–1).  The growth, physiological and biochemical indicators were measured, and a graded scale was developed as the salt damage index (SDI) according to different damage symptoms in leaves.  The results showed SDI increased gradually, and average number and length of new shoot decreased significantly.  Three antioxidant enzymes (superoxide dismutase, peroxidase and catalase) and two osmotic adjustment substances (soluble sugar and proline) showed different changes in old and new leaves of four genotypes.  SPAD values exhibited a decreased trend in the whole except in the new leaves of Acva-2.  Malonaldehyde contents increased and root activity decreased with the increasing salt concentrations.  Principal component analysis was used to assess the salt tolerance, and the results showed Acva-3, from Actinidia valvata Dunn., had the strongest tolerance to salt, and could be a potential resistant resource to the salt-tolerance dedicated rootstock breeding of kiwifruit.
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Articles by authors
ZHONG Yun-peng
QI Xiu-juan
CHEN Jin-yong
LI Zhi
BAI Dan-feng
WEI Cui-guo
FANG Jin-bao
Key wordskiwifruit     salt stress     principal component analysis     resistance evaluation     
Received: 2018-01-29; Accepted: 2018-05-07
Fund: Authors were very thankful to the fundings from the Agricultural Science and Technology Innovation Program, Chinese Academy of Agricultural Sciences (CAAS-ASTIP-2016-ZFRI), the Central Public-Interest Scientific Institution Basal Research Fund, Zhengzhou Fruit Research Institute, CAAS (1610192017708), and the Modern Agricultural Industry Technology of Henan Province, China (S2014-11).
Corresponding Authors: Correspondence FANG Jin-bao, E-mail: fangjinbao@caas.cn   
About author: ZHONG Yun-peng, E-mail: zhongyunpeng@caas.cn, zhongyp_126@126.com;
Cite this article:   
ZHONG Yun-peng, QI Xiu-juan, CHEN Jin-yong, LI Zhi, BAI Dan-feng, WEI Cui-guo, FANG Jin-bao . 2019. Growth and physiological responses of four kiwifruit genotypes to salt stress and resistance evaluation. Journal of Integrative Agriculture, 18(01): 83-95.
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http://www.chinaagrisci.com/Jwk_zgnykxen/EN/ 10.1016/S2095-3119(18)62011-8      or     http://www.chinaagrisci.com/Jwk_zgnykxen/EN/Y2019/V18/I01/83
 
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[1] . [J]. Journal of Integrative Agriculture, 2019, 18(03): 0-.
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