Brassinolides and IAA induce the transcription of four alpha-expansin genes related to development in Cicer arietinum.
Plant Physiol Biochem
; 42(9): 709-16, 2004 Sep.
Article
em En
| MEDLINE
| ID: mdl-15474376
ABSTRACT
Four different cDNAs encoding alpha-expansins have been identified in Cicer arietinum (Ca-EXPA1, Ca-EXPA2, Ca-EXPA3 and Ca-EXPA4). The shared amino acid sequence similarity among the four alpha-expansin proteins ranged from 67 to 89%. All of them display common characteristics such as molecular mass (around 24 kDa), amino acid numbers, and also the presence of a signal peptide. The transcription pattern of chickpea alpha-expansin genes in seedlings and plants suggests a specific role for each of the four alpha-expansins in different phases of development or in different plant organs. High levels of Ca-EXPA2 transcripts coincide with maximum epicotyl and stem growth, indicating an important involvement of this particular alpha-expansin in elongating tissues. Ca-EXPA3 would be related to radicle development, while Ca-EXPA4 seems to be involved in pod development. A considerable increase in the level of all Ca-EXPA transcripts accompanied the indole acetic acid (IAA) plus brassinolide (BR)-induced elongation of excised epicotyl segments. This IAA + BR induction was seen even for the chickpea expansin genes whose transcription was not affected by IAA or BR alone.
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Bases de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
/
Esteroides Heterocíclicos
/
Colestanóis
/
Cicer
/
Ácidos Indolacéticos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Plant Physiol Biochem
Assunto da revista:
BIOQUIMICA
/
BOTANICA
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
Espanha