Multiple interactions of NaHER1 protein with abscisic acid signaling in Nicotiana attenuata plants

Son T ruong Dinh, Ian T. Baldwin, Ivan Gális

Research output: Contribution to journalArticle

Abstract

Previously, we identified a novel herbivore elicitor-regulated protein in Nicotiana attenuata (NaHER1) that is required to suppress abscisic acid (ABA) catabolism during herbivore attack and activate a full defense response against herbivores. ABA, in addition to its newly defined role in defense activation, mainly controls seed germination and stomatal function of land plants. Here we show that N. attenuata seeds silenced in the expression of NaHER1 by RNA interference (irHER1) accumulated less ABA during germination, and germinated faster on ABA-containing media compared to WT. Curiously, epidermal cells of irHER1 plants were wrinkled, possibly due to the previously demonstrated increase in transpiration of irHER1 plants that may affect turgor and cause wrinkling of the cells. We conclude that NaHER1 is a highly pleiotropic regulator of ABA responses in N. attenuata plants.

Original languageEnglish
Pages (from-to)e26365
JournalPlant Signaling and Behavior
Volume8
Issue number11
DOIs
Publication statusPublished - Nov 1 2013
Externally publishedYes

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Keywords

  • ABA metabolism
  • abscisic acid (ABA)
  • germination
  • Nicotiana attenuata

ASJC Scopus subject areas

  • Medicine(all)

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