[Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).]

[Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).] Research Abstract Details 

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[Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).] Abstract Text:

To identify and isolate genes related to abiotic stresses (salinity and drought) tolerance in grapevine, a candidate gene approach was developed and allowed isolating a full-length cDNA of rd22 gene from the Cabernet Sauvignon variety. The latter, named Vvrd22, is a dehydration-responsive gene that is usually induced by the application of exogenous ABA. Details of the physicochemical parameters and structural properties (molecular mass, secondary structure, conserved domains and motives, putative post-translational modification sites...) of the encoded protein have also been elucidated. The expression study of Vvrd22 was carried out at the berry growth stages and at the level of plant organs and tissues as well as under both drought and salt stresses. The results showed that Vvrd22 is constitutively expressed at a low level in all analyzed tissues. Moreover, salt stress induced Vvrd22 expression, particularly for the tolerant variety (Razegui), contrary to the sensitive one (Syrah), which did not display any expression variation during the stress, which means that Vvrd22 is involved in salt stress response and that its expression level depends on regulatory mechanisms that are efficient only for the tolerant variety. On the other hand, under drought stress, Vvrd22 is induced in an identical manner for both tolerant and sensitive varieties. In addition, stress signal molecules such as ABA (lonely applied or in combination with sucrose) induced Vvrd22 expression, even at a low level. A minimal knowledge about the role and the functionality of this gene is necessary and constitutes a prerequisite condition before starting and including Vvrd22 in any program of improvement of grapevine's abiotic stress tolerance. To cite this article: M. Hanana et al., C. R. Biologies 331 (2008).

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[Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).] Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Comptes rendus biologies

VOLUME: 331

Page Numbers: 569-78

Journal Abbreviation: C. R. Biol.

ISSN: 1631-0691

DAY: 20

MONTH: 06

YEAR: 2008

[Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).] Information

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LANGUAGE: fre

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Grant and Affiliation Information for [Identification and characterization of 'rd22' dehydration responsive gene in grapevine (Vitis vinifera L.).]

AFFILIATION: Laboratoire de physiologie moléculaire de la vigne, CBBC, BP 901, 2050 Hammam-lif, Tunisie.

Country: France

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MEDLINETA: C R Biol

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