[Mechanism of salicylic acid ameliorates salt-induced changes in Andrographis paniculata]

• DOI: 10.19540/j.cnki.cjcmm.20200818.101
• Publication Date: 2020-11-01
• Authors: Qichao Wang; Xu L; Miao Zhang; Chai Weiguo; Xuemin Zhang; X U Xin-Han; Liang Zong-suo
• Keywords: Andrographis Paniculata; Andrographolide; Dry weight

In this study, Andrographis paniculata seedlings were used as experimental materials to study the effects of salicylic acid(SA) on growth and effective component accumulation A. under NaCl stress. The results showed that with increase concentration, was significantly inhibited, content carotene carotenoid decreased. activity antioxidant enzyme enhanced. At same time, contents proline, proline soluble protein rise. andrographolide, new andrographolide deoxyandrographolide an upward trend, while a downward trend. Treatment 100 mmol·L~(-1) NaCl+5 mg·L~(-1) SA significant in leaves. NaCl+10 changes leaves, MDA leaves 10 had best effect salt Under treatment 50 SA, fresh weight, dry weight leaf reached highest level, which 1.02, 1.09 1.11 times those control group, respectively. concentrations higher than group. Four key genes diterpene lactone synthesis pathway selected explore molecular mechanism acid alleviate With stress, relative expressions HMGR, GGPS ApCPS up-regulated, indicating stress may enhance through MVA pathway. can effectively promote development improve its osmotic regulation capacity, tolerance, paniculata.