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Wounding of Arabidopsis leaves induces indole‐3‐carbinol‐dependent autophagy in roots of Arabidopsis thaliana
Author(s) -
Katz Ella,
Chamovitz Daniel A.
Publication year - 2017
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.13610
Subject(s) - auxin , arabidopsis , arabidopsis thaliana , glucosinolate , autophagy , indole test , biology , microbiology and biotechnology , botany , mutant , biochemistry , gene , apoptosis , brassica
Summary In cruciferous plants insect attack or physical damage induce the synthesis of the glucosinolate breakdown product indole‐3‐carbinol, which plays a key role in the defense against attackers. Indole‐3‐carbinol also affects plant growth and development, acting as an auxin antagonist by binding to the TIR 1 auxin receptor. Other potential functions of indole‐3‐carbinol and the underlying mechanisms in plant biology are unknown. Here we show that an indole‐3‐carbinol‐dependent signal induces specific autophagy in root cells. Leaf treatment with exogenous indole‐3‐carbinol or leaf‐wounding induced autophagy and inhibited auxin response in the root. This induction is lost in glucosinolate‐defective mutants, indicating that the effect of indole‐3‐carbinol is transported in the plants. Thus, indole‐3‐carbinol is not only a defensive metabolite that repels insects, but is also involved in long‐distance communication regulating growth and development in plants.