Characterization in maize of ZmTIP2-3, a root-specific tonoplast intrinsic protein exhibiting aquaporin activity | Zendy

Fabrice Lopez | Zendy; A. Bousser | Zendy; Igor Sissoëff | Zendy; J. Hoarau | Zendy; Aline Mahé | Zendy

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Characterization in maize of ZmTIP2-3, a root-specific tonoplast intrinsic protein exhibiting aquaporin activity

Author(s) -

Fabrice Lopez,

A. Bousser,

Igor Sissoëff,

J. Hoarau,

Aline Mahé

Publication year - 2003

Publication title -

journal of experimental botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.616

H-Index - 242

eISSN - 1460-2431

pISSN - 0022-0957

DOI - 10.1093/jxb/052

Subject(s) - aquaporin , vacuole , northern blot , complementary dna , biology , gene expression , gene , botany , circadian rhythm , microbiology and biotechnology , biochemistry , cytoplasm , neuroscience

The characterization of the tonoplast intrinsic protein ZmTIP2-3 cDNA isolated from maize roots is reported. ZmTIP2-3 belongs to the TIP2 group according to the present nomenclature. The aquaporin function of ZmTIP2-3 protein was demonstrated using expression in X. laevis oocytes. Northern blot analyses revealed that ZmTIP2-3 was specifically expressed in roots. Salt and water stresses induced the accumulation of ZmTIP2-3 transcripts. By contrast, no effect of ABA was observed. An oscillation of ZmTIP2-3 transcript amount during the day-night cycle was observed with some typical features of genes regulated by a circadian mechanism.

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