Osmoprotectants and Antioxidative Enzymes as Screening Tools for Salinity Tolerance in Radish (Raphanus sativus)

作     者：Rabab Sanoubar Antonio Cellini Giuseppe Gianfranco Francesco Spinelli Rabab Sanoubar;Antonio Cellini;Giuseppe Gianfranco;Francesco Spinelli

作者机构：Department of Agricultural Sciences (DIPSA)University of Bologna 

出 版 物：《Horticultural Plant Journal》 (园艺学报（英文版）)

年 卷 期：2020年第6卷第1期

页      面：14-24页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0807[工学-动力工程及工程热物理] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 090202[农学-蔬菜学] 

主　　题：radish salt stress oxidative stress secondary metabolite antioxidant enzyme 

摘      要：The research addresses the identification of a screening methodology for salt stress tolerance in radish cultivars. In the first experiment, two different radish cultivars(long white and round red) were compared in their morphological and physiological responses to different salinity levels. Round red radish showed better morphological and physiological responses to incremental salinity in terms of yield and better adaptation of overall water relations. In the second experiment, the most tolerant genotype from the first experiment was used as a control against other seven round red radish genotypes ranked by their salinity tolerance according to morphological, physiological and biochemical indices. Salt stress did not significantly affect malondialdehyde(MDA) and hydrogen peroxide(H2O2) content, and ascorbate peroxidase(APX) activity in the studied cultivars. Nonetheless, the relatively salt tolerant cultivar SAXA2 showed higher ability to accumulate compatible solutes(*** and proteins) and maintain osmotic adjustment. In addition, cultivar SAXA2 also showed considerable increase in glutathione reductase(GR) activity. Our results supported that accumulation of proline and higher GR activity are associated with radish salt tolerance, whereas no relationship with salinity was observed in superoxide dismutase(SOD), MDA and H2O2 content.