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Cinnamaldehyde promotes root branching by regulating endogenous hydrogen sulfide
Author(s) -
Xue YanFeng,
Zhang Meng,
Qi ZhongQiang,
Li YouQin,
Shi Zhiqi,
Chen Jian
Publication year - 2016
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7164
Subject(s) - hypotaurine , endogeny , sodium hydrosulfide , chemistry , biochemistry , cinnamaldehyde , hydrogen sulfide , taurine , sulfur , organic chemistry , amino acid , catalysis
BACKGROUND Cinnamaldehyde ( CA ) has been widely applied in medicine and food preservation. However, whether and how CA regulates plant physiology is largely unknown. To address these gaps, the present study investigated the beneficial effect of CA on root branching and its possible biochemical mechanism.RESULTS The lateral root ( LR ) formation of pepper seedlings could be markedly induced by CA at specific concentrations without any inhibitory effect on primary root ( PR ) growth. CA could induce the generation of endogenous hydrogen sulfide ( H 2 S ) by increasing the activity of l ‐cysteine desulfhydrase in roots. By fluorescently tracking endogenous H 2 S in situ , it could be clearly observed that H 2 S accumulated in the outer layer cells of the PR where LRs emerge. Sodium hydrosulfide ( H 2 S donor) treatment induced LR formation, while hypotaurine ( H 2 S scavenger) showed an adverse effect. The addition of hypotaurine mitigated the CA ‐induced increase in endogenous H 2 S level, which in turn counteracted the inducible effect of CA on LR formation.CONCLUSION CA showed great potential in promoting LR formation, which was mediated by endogenous H 2 S . These results not only shed new light on the application of CA in agriculture but also extend the knowledge of H 2 S signaling in the regulation of root branching. © 2015 Society of Chemical Industry