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Título
Water stress-regulated gene expression in Cicer arietinum seedlings and plants
Autor(es)
Palabras clave
Chickpea
Growth
Glyoxalase
LEA proteins
Lipid transfer proteins
Polyethylene glycol
Water stress
Fecha de publicación
2001
Resumen
Water stress induces biochemical and physiological responses in plants, such as growth inhibition. A number of
genes that respond to drought stress in Cicer arietinum are described and their expression patterns are studied in order to give
an approach of their function. Genes coding for lipid transfer proteins (LTP) and late embryogenesis abundant (LEA) proteins
seem to be important in chickpea water stress response. The induction of these genes is not exclusive of osmotic stress caused
by polyethylene glycol, since they also showed a significant up-regulation by high salinity. These genes are not responsive to
exogenous abscisic acid (ABA) treatment. CapLTP was mainly expressed in young tissues: messengers are more abundant in
seedlings than in adult plants, and the transcript level decreased gradually as the age of epicotyls increased. In this sense, LTPs
would be involved in cuticle synthesis during early developmental stages. CapLEA-1 and CapLEA-2 are markedly up-regulated
by NaCl treatment in every seedling sections. The response of these genes to high salinity suggests their implication in protection
of cellular functions from high ion concentration damage. Present results agree with the postulated role for group 3 LEAs in
sequestering ions, thus palliating toxic effects of NaCl. The presence of LEAs in vegetative well-watered tissues suggests a new
function for these proteins. Other cDNAs encoding glyoxalases, proline-rich proteins and raffinose synthases have also been
identified as induced by water stress.
URI
ISSN
0981-9428
DOI
10.1016/S0981-9428(01)01318-3
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- GIPACYCV. Artículos [59]
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