Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana.

Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana. Research Abstract Details 

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Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana. Abstract Text:

Akie Kobayashi,Yoko Kakimoto,Nobuharu Fujii,Hideyuki Takahashi,

Roots display positive hydrotropism in response to moisture gradient. Hydrotropism regulates the directional growth by interaction with other growth movements. Using the seedlings of pea, cucumber, maize and wheat, we have revealed that the root cap perceives the moisture gradient and that auxin and calcium are involved in hydrotropism. However, molecular mechanisms for stimulus perception or signal transduction in hydrotropism are still remained unrevealed. To dissect the molecular mechanism underlying hydrotropism in seedling roots, we established a method for screening Arabidopsis mutants defective in root hydrotropism. Among about 20,000 M2 seedlings of Arabidopsis plants treated with EMS, we successfully obtained 12 mutants of which root hydrotropism was reduced to various extents. We named them root hydrotropism (rhy) and examined their gravitropism, phototropism, waving response and elongation growth as well as hydrotropism in roots. Roots of rhy1 mutant showed ahydrotropic response although the other responses and elongation growth of rhy1 mutant were normal. Roots of rhy2 and rhy3 mutants showed a reduced hydrotropism and abnormal responses in gravitropism, phototropism or waving pattern. Genetic analysis of the progeny produced by the backcross of rhy1 mutant to wild type suggested that rhy1 was a recessive mutation. We also examined the map position of the rhy1 locus.

Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana. Publishing Authors By Initials

A Kobayashi,Y Kakimoto,N Fujii,H Takahashi,

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Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Biological sciences in space = Uch? seibutsu kagak

VOLUME: 17

Page Numbers: 243-4

Journal Abbreviation: Biol. Sci. Space

ISSN: 0914-9201

DAY: 16

MONTH: Oct

YEAR: 2003

Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Physiological and genetic characterization of hydrotropic mutants of Arabidopsis thaliana.

AFFILIATION: Graduate School of Life Sciences, Tohoku University.

Country: Japan

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MEDLINETA: Biol Sci Space

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