A new Arabidopsis mutant is characterized (rha1) that shows, in the roots, reduced right-handed slanting, reduced gravitropism and resistance to 2,4-D, TIBA, NPA and ethylene. It also shows reduced length in the shoot and root, reduced number of lateral roots and shorter siliques. The gene was cloned through TAIL-PCR and resulted in a HSF. Because none of the known gravitropic and auxinic mutants result from damage in a HSF, rha1 seems to belong to a new class of this group of mutants. Quantitative PCR analysis showed that the expression of the gene is increased by heat and cold shock, and by presence of 2,4-D in the media. Study of the expression through the GUS reporter gene revealed increased expression in clinostated and gravistimulated plants, but only in adult tissues, and not in the apical meristems of shoots and roots.

Rha1, a new mutant of Arabidopsis disturbed in root slanting, gravitropism and auxin physiology / A., Fortunati; S., Piconese; P., Tassone; Ferrari, Simone; F., Migliaccio. - In: PLANT SIGNALING & BEHAVIOR. - ISSN 1559-2316. - 3:11(2008), pp. 989-990. [10.4161/psb.6290]

Rha1, a new mutant of Arabidopsis disturbed in root slanting, gravitropism and auxin physiology

FERRARI, Simone;
2008

Abstract

A new Arabidopsis mutant is characterized (rha1) that shows, in the roots, reduced right-handed slanting, reduced gravitropism and resistance to 2,4-D, TIBA, NPA and ethylene. It also shows reduced length in the shoot and root, reduced number of lateral roots and shorter siliques. The gene was cloned through TAIL-PCR and resulted in a HSF. Because none of the known gravitropic and auxinic mutants result from damage in a HSF, rha1 seems to belong to a new class of this group of mutants. Quantitative PCR analysis showed that the expression of the gene is increased by heat and cold shock, and by presence of 2,4-D in the media. Study of the expression through the GUS reporter gene revealed increased expression in clinostated and gravistimulated plants, but only in adult tissues, and not in the apical meristems of shoots and roots.
2008
auxin; ethylene; gravitropism; hsfs; slanting
01 Pubblicazione su rivista::01a Articolo in rivista
Rha1, a new mutant of Arabidopsis disturbed in root slanting, gravitropism and auxin physiology / A., Fortunati; S., Piconese; P., Tassone; Ferrari, Simone; F., Migliaccio. - In: PLANT SIGNALING & BEHAVIOR. - ISSN 1559-2316. - 3:11(2008), pp. 989-990. [10.4161/psb.6290]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/131595
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