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Naringenin inhibits seed germination and seedling root growth through a salicylic acid-independent mechanism in Arabidopsis thaliana.
MedLine Citation:
PMID:  23031844     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Flavonoids fulfill an enormous range of biological functions in plants. In seeds, these compounds play several roles; for instance proanthocyanidins protect them from moisture, pathogen attacks, mechanical stress, UV radiation, etc., and flavonols have been suggested to protect the embryo from oxidative stress. The present study aimed at determining the role of flavonoids in Arabidopsis thaliana (L.) seed germination, and the involvement of salicylic acid (SA) and auxin (indole-3-acetic acid), two phytohormones with the same biosynthetic origin as flavonoids, the shikimate pathway, in such a putative role. We show that naringenin, a flavanone, strongly inhibits the germination of A. thaliana seeds in a dose-dependent and SA-independent manner. Altered auxin levels do not affect seed germination in Arabidopsis, but impaired auxin transport does, although to a minor extent. Naringenin and N-1-naphthylphthalamic acid (NPA) impair auxin transport through the same mechanisms, so the inhibition of germination by naringenin might involve impaired auxin transport among other mechanisms. From the present study it is concluded that naringenin inhibits the germination of Arabidopsis seeds in a dose-dependent and SA-independent manner, and the results also suggest that such effects are exerted, at least to some extent, through impaired auxin transport, although additional mechanisms seem to operate as well.
Authors:
Iker Hernández; Sergi Munné-Bosch
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-18
Journal Detail:
Title:  Plant physiology and biochemistry : PPB / Societe francaise de physiologie vegetale     Volume:  61C     ISSN:  1873-2690     ISO Abbreviation:  Plant Physiol. Biochem.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882449     Medline TA:  Plant Physiol Biochem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  24-28     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Masson SAS. All rights reserved.
Affiliation:
Departament de Biologia Vegetal, Edifici Margalef, Facultat de Biologia, Universitat de Barcleona, Avda. Diagonal 643, Margalef Bldg, 08028 Barcelona, Spain. Electronic address: iker_hernandez@ub.edu.
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