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NaCl-induced stress: physiological responses of six halophyte species in in vitro and in vivo culture

文献类型： 外文期刊

作者： Xiong, Yuping 1 ; Liang, Hanzhi 1 ; Yan, Haifeng 3 ; Guo, Beiyi 1 ; Niu, Meiyun 1 ; Chen, Shuangyan 1 ; Jian, Shuguang 1 ;

作者机构： 1.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

3.Guangxi Acad Agr Sci, Cash Crop Inst, Nanning 30007, Peoples R China

4.POB 7,Miki Cho PO,Ikenobe 3011-2, Miki, Kagawa 7610799, Japan

关键词： Halophyte; Clerodendrum inerme (L; ) Gaertn; Vitex rotundifolia L; Phyla nodiflora (L; ) Greene; Scaevola sericea Vahl; Alternanthera bettzickiana (Regel) Nichols; Dracaena cambodiana Pierre ex Gagn; Salt tolerance; Physiological parameters

期刊名称：PLANT CELL TISSUE AND ORGAN CULTURE （ 影响因子：2.711； 五年影响因子：2.73 ）

ISSN： 0167-6857

年卷期： 2019 年 139 卷 3 期

页码：

收录情况： SCI

摘要： Key message Six halophytic species showed a different salt tolerance level under in vitro and in vivo culture tests, due to the activities of antioxidant enzymes and the accumulation of free proline. To investigate the mechanisms underlying salt tolerance, physiological parameters of six halophyte species [Vitex rotundifolia L., Clerodendrum inerme (L.) Gaertn, Phyla nodiflora (L.) Greene, Scaevola sericea Vahl, Alternanthera bettzickiana (Regel) Nichols, and Dracaena cambodiana Pierre ex Gagn] under NaCl stress in in vitro and in vivo culture tests were examined. Membership function analysis and cluster analysis divided the six species, based on their salt tolerance level, into three groups: Group 1 (highly salt tolerant) included C. inerme, A. bettzickiana and S. sericea; Group 2 (moderately salt tolerant) included P. nodiflora; Group 3 (weakly salt tolerant) included V. rotundifolia and D. cambodiana. In response to in vitro NaCl stress, all six species showed a significant increase in the activities of antioxidant enzymes. NaCl stress enhanced free proline content in the leaves of all six species. CAT, SOD activity and proline accumulation were significantly correlated with the growth of C. inerme, P. nodiflora and A. bettzickiana under in vitro NaCl treatment. We conclude that NaCl-tolerant plants may suffer slight damage within a certain salt concentration, as evidenced by the activities of antioxidant enzymes and the accumulation of free proline.

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