Effect of Poly(γ-glutamic acid) on the Physiological Responses and Calcium Signaling of Rape Seedlings (Brassica napus L.) under Cold Stress

• DOI: 10.1021/acs.jafc.5b04523
• Publication Date: 2015-11-20T04:30:40Z
• Authors: Peng Lei; Zongqi Xu; Yan Ding; Bao Tang; Yunxia Zhang; Huashan Li; Xiaohai Feng; Hong Xu
• Keywords: Malondialdehyde; Cold stress; Glutamic acid

Cold stress adversely affects plant growth and development. Poly(γ-glutamic acid) (γ-PGA) is a potential regulator that may be an effective cryoprotectant prevents crops from damage during cold weather. In this study, the effects of γ-PGA on physiological responses rape seedlings subject to were investigated using hydroponic experiments. We determined malondialdehyde content was decreased by 33.4% proline increased 62.5% after 144 h under stress. Antioxidant enzymes activities also evidently enhanced treatment with γ-PGA. These counteracted increases in fresh weight chlorophyll seedlings, which 24.5 50.9%, respectively, h, meant inhibition caused mitigated Our results showed regulated Ca2+ concentrations cytoplasm calcium-dependent protein kinases, are associated resistance. conclusion, we suggest Ca2+/CPKs signal pathway involved γ-PGA-mediated enhancement resistance seedlings.