Effects of Endogenous Salicylic Acid During Calcium Deficiency-Induced Tipburn in Chinese Cabbage (Brassica rapa L. ssp pekinensis)

文献类型： 外文期刊

第一作者： Su, Tongbing

作者： Su, Tongbing;Yu, Shuancang;Yu, Ruifang;Zhang, Fenglan;Yu, Yangjun;Zhang, Deshuang;Zhao, Xiuyun;Wang, Weihong;Su, Tongbing;Yu, Shuancang;Yu, Ruifang;Zhang, Fenglan;Yu, Yangjun;Zhang, Deshuang;Zhao, Xiuyun;Wang, Weihong

作者机构：

关键词： Chinese cabbage;Tipburn;Calcium;Ca2+ transporter;Salicylic acid

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

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收录情况： SCI

摘要： By cultivating tipburn-susceptible plants in modified Hoagland's medium containing of gradient exogenous calcium (Ca2+), we have shown that Ca2+ deficiency is one of the main causes of tipburn in Chinese cabbage (Brassica rapa L. ssp. pekinensis). The effect of endogenous plant Ca2+ concentrations on tipburn was also studied in a doubled haploid (DH) population consisting of 100 individuals, but no correlation was found. We then examined the expression of 12 Ca2+ transporter genes that function in cytosolic Ca2+ homeostasis in both tipburn-susceptible and tipburn-resistant plants under normal and tipburn-inducing conditions. Expression patterns for most of these genes differed between the two types of plants. Salicylic acid (SA) accumulated in response to conditions of calcium deficiency in our study, and both total SA and SA beta-glucoside (SAG) in tipburn-susceptible plants was similar to 3-fold higher than it was in resistant plants following Ca2+ deficiency treatment. Also, the changes observed in SA levels correlated well with cell death patterns revealed by trypan blue staining. Therefore, we speculate that the cytoplasmic Ca2+ fluctuation-induced downstream signaling events, as well as SA signaling or other biological events, are involved in the plant defense response to tipburn in Chinese cabbage.

分类号： Q94`Q7

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