首页|Analysis of changes in the Panax notoginseng glycerolipidome in response to long-term chilling and heat
Analysis of changes in the Panax notoginseng glycerolipidome in response to long-term chilling and heat
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Long-term moderately high or low temperatures can damage economically important plants. In the present study, we treated Panax notoginseng, an important traditional Chinese medicine, with temper-atures of 10, 20, and 30 ℃ for 30 days. We then investigated P. notoginseng glycerolipidome responses to these moderate temperature stresses using an ESI/MS-MS-based lipidomic approach. Both long-term chilling (LTC, 10 ℃) and long-term heat (LTH, 30 ℃) decreased photo pigment levels and photosyn-thetic rate. LTH-induced degradation of photo pigments and glycerolipids may further cause the decline of photosynthesis and thereafter the senescence of leaves. LTC-induced photosynthesis decline is attributed to the degradation of photosynthetic pigments rather than the degradation of chloroplastidic lipids. P. notoginseng has an especially high level of lysophosphatidylglycerol, which may indicate that either P. notoginseng phospholipase A acts in a special manner on phosphatidylglycerol (PG), or that phospholipase B acts. The ratio of sulfoquinovosyldiacylglycerol (SQDG) to PG increased significantly after LTC treatment, which may indicate that SQDG partially substitutes for PG. After LTC treatment, the increase in the degree of unsaturation of plastidic lipids was less than that of extraplastidic lipids, and the increase in the unsaturation of PG was the largest among the ten lipid classes tested. These results indicate that increasing the level of unsaturated PG may play a special role in maintaining the function and stability of P. notoginseng photosystems after LTC treatment.
Tao Liu、Jia Chen、Furong Xu、Xiahong He、Shengchao Yang、Youyong Zhu、Weiqi Li、Guowei Zheng
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National&Local Joint Engineering Research Center on Germplasm Utilization&Innovation of Chinese Medicinal Materials in Southwest China,Yunnan Agricultural University,Kunming,China
Yunnan Key Laboratory of Dai and Yi Medicines,Yunnan University of Chinese Medicine,Kunming,China
College of Chinese Material Medica,Yunnan University of Chinese Medicine,Kunming,China
Germplasm Bank of Wild Species,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,China
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This work was supported by grants from National Natural Sci-ence Foundation of ChinaHigh Level Talents Project of Yunnan University of Chinese Medi-cineNatural Science Fund of Yunnan Province
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