Premium
NaMYB8 regulates distinct, optimally distributed herbivore defense traits
Author(s) -
Schäfer Martin,
Brütting Christoph,
Xu Shuqing,
Ling Zhihao,
Steppuhn Anke,
Baldwin Ian T.,
Schuman Meredith C.
Publication year - 2017
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12593
Subject(s) - myb , biology , herbivore , plant defense against herbivory , microbiology and biotechnology , activator (genetics) , transcription factor , gene , genetics , botany
Summary When herbivores attack, plants specifically reconfigure their metabolism. Herbivory on the wild tobacco Nicotiana attenuata strongly induces the R2R3 MYB transcriptional activator MYB8, which was reported to specifically regulate the accumulation of phenolamides (PAs). We discovered that transcriptional regulation of trypsin protease inhibitors (TPIs) and a threonine deaminase (TD) also depend on MYB8 expression. Induced distributions of PAs, TD and TPIs all meet predictions of optimal defense theory: their leaf concentrations increase with the fitness value and the probability of attack of the tissue. Therefore, we suggest that these defensive compounds have evolved to be co‐regulated by MYB8.