The tomato res mutant which accumulates JA in roots in non-stressed conditions restores cell structure alterations under salinity.
Physiol Plant
; 155(3): 296-314, 2015 Nov.
Article
em En
| MEDLINE
| ID: mdl-25582191
ABSTRACT
Jasmonic acid (JA) regulates a wide spectrum of plant biological processes, from plant development to stress defense responses. The role of JA in plant response to salt stress is scarcely known, and even less known is the specific response in root, the main plant organ responsible for ionic uptake and transport to the shoot. Here we report the characterization of the first tomato (Solanum lycopersicum) mutant, named res (restored cell structure by salinity), that accumulates JA in roots prior to exposure to stress. The res tomato mutant presented remarkable growth inhibition and displayed important morphological alterations and cellular disorganization in roots and leaves under control conditions, while these alterations disappeared when the res mutant plants were grown under salt stress. Reciprocal grafting between res and wild type (WT) (tomato cv. Moneymaker) indicated that the main organ responsible for the development of alterations was the root. The JA-signaling pathway is activated in res roots prior to stress, with transcripts levels being even higher in control condition than in salinity. Future studies on this mutant will provide significant advances in the knowledge of JA role in root in salt-stress tolerance response, as well as in the energy trade-off between plant growth and response to stress.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Solanum lycopersicum
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Raízes de Plantas
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Ciclopentanos
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Oxilipinas
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Mutação
Idioma:
En
Revista:
Physiol Plant
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Espanha