Does the brassinosteroid signal pathway in photomorphogenesis overlap with the gravitropic response caused by auxin?
Biosci Biotechnol Biochem
; 78(11): 1839-49, 2014.
Article
em En
| MEDLINE
| ID: mdl-25351332
ABSTRACT
Brassinosteroid (BR) and auxin co-regulate plant growth in a process termed cross-talking. Based on the assumption that their signal transductions are partially shared, inhibitory chemicals for both signal transductions were screened from a commercially available library. A chemical designated as NJ15 (ethyl 2-[5-(3,5-dichlorophenyl)-1,2,3,4-tetrazole-2-yl]acetate) diminished the growth promotion of both adzuki bean epicotyls and Arabidopsis seedlings, by the application of either BR or auxin. To understand its target site(s), bioassays with a high dependence on the signal transduction of either BR (BR-signaling) or auxin (AX-signaling) were performed. NJ15 inhibited the photomorphogenesis of Arabidopsis seedlings grown in the dark, which mainly depends on BR-signaling, while NJ15 also inhibited their gravitropic responses mainly depending on AX-signaling. On the study for the structure-activity relationships of NJ15 analogs, they showed strong correlations on the inhibitory profiles between BR- and AX-signalings. These correlations imply that NJ15 targets the downstream pathway after the integration of BR- and AX-signals.
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Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Tetrazóis
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Arabidopsis
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Escuridão
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Bibliotecas de Moléculas Pequenas
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Ácidos Indolacéticos
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Fabaceae
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Luz
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Acetatos
Idioma:
En
Revista:
Biosci Biotechnol Biochem
Assunto da revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Japão