Abstract
In response to herbivore attack, plants perceive herbivore associated elicitors (HAE) and rapidly accumulate jasmonic acid (JA) and other phytohormones, which interact in complex ways, such as the crosstalk between JA and salicylic acid (SA). Although recent studies have shown that HAE-induced individual phytohormones can be highly specific among closely related species, it remains unclear how conserved and specific the relationships among HAE-induced phytohormones are. Here we analyzed the correlations among 4 different phytohormones, JA, JA-isoleucine (JA-Ile), SA, and abscisic acid (ABA) in 6 closely related Nicotiana species that were induced by 3 different HAEs. Our results showed that while no clear association between ABA and other phytohormones were found, the positive association between JA and JA-Ile is mostly conserved among closely related Nicotiana species. Interestingly, the association between JA and SA are highly variable and can be regulated by different HAEs.
Highlights
In response to herbivore attack, plants induce rapid phytohormonal changes through the perception of chemical cues in insect oral secretion (OS).[1]
While herbivore associated elicitors (HAE)-induced individual phytohormonal responses were known to be highly variable among plant species and herbivore-dependent,[10,11,12] how conserved and specific the relationships are among induced phytohormones remains unclear
Nicotiana species,[11] we investigated 2 questions: 1) how conserved are the relationships among HAE-induced phytohormones from closely related plant species? 2) can HAE elicitations regulate the relationships among phytohormones within a species?
Summary
In response to herbivore attack, plants induce rapid phytohormonal changes through the perception of chemical cues (herbivore-associated elicitors: HAE) in insect oral secretion (OS).[1]. Nicotiana species,[11] we investigated 2 questions: 1) how conserved are the relationships among HAE-induced phytohormones from closely related plant species?
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