Dynamic calcium signals mediate the feeding response of the carnivorous sundew plant

Carl Procko, Ivan Radin, Charlotte Hou, Ryan A. Richardson, Elizabeth S. Haswell, Joanne Chory

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

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 Ca2+. Here, we find that dynamic Ca2+changes also occur in sundew (Drosera spatulata) leaves responding to prey-associated mechanical and chemical stimuli. Furthermore, inhibition of these Ca2+changes reduced expression of JA target genes and leaf movements following chemical feeding. Our results are consistent with the presence of a conserved Ca2+-dependent JA signaling pathway in the sundew feeding response and provide further credence to the defensive origin of plant carnivory.

Original languageEnglish
Article numbere2206433119
JournalProceedings of the National Academy of Sciences of the United States of America
Volume119
Issue number30
DOIs
StatePublished - Jul 26 2022

Keywords

  • calcium signaling
  • carnivorous plants
  • mechanosensation
  • sundew

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