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论文题目:Analysis of Isoquinoline Alkaloid Composition and Wound-Induced Variation in Nelumbo Using HPLC-MS/MS

作 者:Xianbao Deng,*,⊥ Lingping Zhu,?,§ Ting Fang,*,§ Sornkanok Vimolmangkang,*,# Dong Yang,* Collins Ogutu,*,§ Yanling Liu,* and Yuepeng Han*

参与单位:1.Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture and ?Key Laboratory of Aquatic Plant and Watershed Ecology, Wuhan Botanical Garden of the Chinese Academy of Sciences, Wuhan 430074, People’s Republic of China

2.Graduate University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, People’s Republic of China

3.Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand

4.Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, People’s Republic of China

摘 要:Alkaloids are the most relevant bioactive components in lotus, a traditional herb in Asia, but little is known about their qualitative and quantitative distributions. Here, we report on the alkaloid composition in various lotus organs. Lotus laminae and embryos are rich in isoquinoline alkaloids, whereas petioles and rhizomes contain trace amounts of alkaloids. Wide variation of alkaloid accumulation in lamina and embryo was observed among screened genotypes. In laminae, alkaloid accumulation increases during early developmental stages, reaches the highest level at full size stage, and then decreases slightly during senescence. Vegetative and embryogenic tissues accumulate mainly aporphine-type and bisbenzylisoquinoline-type alkaloids, respectively. Bisbenzylisoquinoline-type alkaloids may be synthesized mainly in lamina and then transported into embryo via latex through phloem translocation. In addition, mechanical wounding was shown to induce significant accumulation of specific alkaloids in lotus leaves.

 

 

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