At-ACA8 and At-ACA9 are two plasma membrane (PM) Ca2+-ATPases of Arabidopsis thaliana. In this article the expression of At-ACA8, At-ACA9, and of At-ACA10, a third isoform of Ca2+-ATPase closely related to PM Ca2+-ATPases, was analyzed and the effect of the hormone abscisic acid (ABA) on the expression level of PM Ca2+-ATPase specific transcripts was investigated. In adult plants of A. thaliana, At-ACA8 and At-ACA10 are expressed in all organs considered whereas At-ACA9 is expressed only in flowers. All isoforms of PM Ca2+-ATPases can be detected in young seedlings but the amt. of At-ACA9 mRNA is much lower than those of At-ACA8 and At-ACA10. ABA markedly and rapidly stimulates the expression of both At-ACA8 and At-ACA9 genes in young seedlings but not that of At-ACA10. ABA also increases the level of At-ACA8 protein at the PM, suggesting a role for PM Ca2+-ATPases in ABA signalling. [on SciFinder (R)]

Abscisic acid stimulates the expression of two isoforms of plasma membrane Ca2+-ATPase in Arabidopsis thaliana seedlings / M. Cerana, M. C. Bonza, R. Harris, D. Sanders, M. I. De Michelis. - In: PLANT BIOLOGY. - ISSN 1435-8603. - 8:5(2006), pp. 572-578.

Abscisic acid stimulates the expression of two isoforms of plasma membrane Ca2+-ATPase in Arabidopsis thaliana seedlings

M. Cerana
Primo
;
M. C. Bonza
Secondo
;
M. I. De Michelis
Ultimo
2006

Abstract

At-ACA8 and At-ACA9 are two plasma membrane (PM) Ca2+-ATPases of Arabidopsis thaliana. In this article the expression of At-ACA8, At-ACA9, and of At-ACA10, a third isoform of Ca2+-ATPase closely related to PM Ca2+-ATPases, was analyzed and the effect of the hormone abscisic acid (ABA) on the expression level of PM Ca2+-ATPase specific transcripts was investigated. In adult plants of A. thaliana, At-ACA8 and At-ACA10 are expressed in all organs considered whereas At-ACA9 is expressed only in flowers. All isoforms of PM Ca2+-ATPases can be detected in young seedlings but the amt. of At-ACA9 mRNA is much lower than those of At-ACA8 and At-ACA10. ABA markedly and rapidly stimulates the expression of both At-ACA8 and At-ACA9 genes in young seedlings but not that of At-ACA10. ABA also increases the level of At-ACA8 protein at the PM, suggesting a role for PM Ca2+-ATPases in ABA signalling. [on SciFinder (R)]
Abscisic acid; Gene expression; Plant type IIb Ca2+-ATPases; Plasma membrane; Real-time PCR; RT-PCR
Settore BIO/04 - Fisiologia Vegetale
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/23098
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