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Stress-responsive zinc finger gene ZPT2-3 plays a role in drought tolerance in petunia

AuthorsSugano, Shoji; Kaminaka, Hironori; Rybka, Zbigniew; Catalá, Rafael ; Salinas, Julio ; Matsuy, Kyoko; Ohme-Takagi, Masaru; Takatsuji, Hiroshi
heavy metal
transcription factor
Issue DateDec-2003
PublisherBlackwell Publishing
CitationPlant Journal 36(6):830-841(2003)
AbstractThe petunia gene, ZPT2-3, encodes a Cys2/His2-type zinc finger protein. Here, we describe the expression of ZPT2-3 in response to various stresses and the effects of ZPT2-3 overexpression in transgenic petunia. Mechanical wounding induced accumulation of ZPT2-3 transcript, and the activity of ZPT2-3::luciferase was conferred by the 1668-bp ZPT2-3 upstream sequence, both locally and systemically. This induction was mediated by a jasmonic acid (JA)-dependent and ethylene-independent pathway. ZPT2-3 expression was also induced by cold, drought, and heavy metal treatments. The same ZPT2-3 promoter sequence showed similar responsiveness to wounding, cold, drought, and JA treatments in Arabidopsis when investigated in a β-glucuronidase (GUS) reporter gene, indicating conservation of similar signaling pathways between the two plant species. ZPT2-3 functioned as an active repressor in a transient assay using Arabidopsis leaves. Constitutive overexpression of ZPT2-3 in transgenic petunia plants increased tolerance to dehydration. These results demonstrate the involvement of ZPT2-3 in plant response to various stresses, and suggest its potential utility to improve drought tolerance
Description12 páginas, 9 figuras, 1 tabla -- PAGS nros. 830-841
Publisher version (URL)https://dx.doi.org/10.1046/j.1365-313X.2003.01924.x
Appears in Collections:(CIB) Artículos
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