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标题：Dynamic calcium signals mediate the feeding response of the carnivorous sundew plant
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作者：Carl Procko ; Ivan Radin ; Charlotte Hou 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2022
卷号：119
期号：30
DOI：10.1073/pnas.2206433119
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Some of the most spectacular examples of botanical carnivory—in which predator plants catch and digest animals presumably to supplement the nutrient-poor soils in which they grow—occur within the Droseraceae family. For example, sundews of the genus Drosera have evolved leaf movements and enzyme secretion to facilitate prey digestion. The molecular underpinnings of this behavior remain largely unknown; however, evidence suggests that prey-induced electrical impulses are correlated with movement and production of the defense hormone jasmonic acid (JA), which may alter gene expression. In noncarnivorous plants, JA is linked to electrical activity via changes in cytoplasmic Ca 2+. Here, we find that dynamic Ca 2+ changes also occur in sundew ( Drosera spatulata) leaves responding to prey-associated mechanical and chemical stimuli. Furthermore, inhibition of these Ca 2+ changes reduced expression of JA target genes and leaf movements following chemical feeding. Our results are consistent with the presence of a conserved Ca 2+-dependent JA signaling pathway in the sundew feeding response and provide further credence to the defensive origin of plant carnivory.
关键词：encarnivorous plantscalcium signalingmechanosensationsundew