Novel hydrotropism mutants of Arabidopsis thaliana and their altered waving response and phototropism.

Novel hydrotropism mutants of Arabidopsis thaliana and their altered waving response and phototropism. Research Abstract Details 

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Novel hydrotropism mutants of Arabidopsis thaliana and their altered waving response and phototropism. Abstract Text:

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

Roots display positive hydrotropism in response to a moisture gradient, which is important for plants to escape from water stress and regulate the directional growth by interacting with other growth movements such as gravitropism, phototropism and waving response. On Earth, hydrotropism is interfered by gravitropism in particular, so that microgravity conditions or agravitropic mutants have been used for the study of hydrotropism. However, we have recently established an experimental system for the study of hydrotropism in Arabidopsis roots that easily develop hydrotropism in response to moisture gradient by overcoming gravitropism. Using the Arabidopsis system, we isolated hydrotropism mutants named root hydrotropism (rhy). In the present study, we examined the hydrotropism, gravitropism, phototropism, waving response and elongation growth of rhy4 and rhy5 roots that were defective in positive hydrotropism. Interestingly, rhy4 roots curved away from the water source and showed a reduced waving response. Both rhy4 and rhy5 showed normal gravitropism and a slight reduction in phototropism. These results suggest that there is a mutual molecular mechanism underlying hydrotropism, waving response and/or phototropism. Thus, we have obtained novel hydrotropic mutants that will be used for revealing molecular mechanism of root hydrotropism and its interaction with waving response and/or phototropism.

Novel hydrotropism mutants of Arabidopsis thaliana and their altered waving response and phototropism. Publishing Authors By Initials

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

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Novel hydrotropism mutants of Arabidopsis thaliana and their altered waving response and phototropism. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Biological sciences in space = Uch? seibutsu kagak

VOLUME: 17

Page Numbers: 209-10

Journal Abbreviation: Biol. Sci. Space

ISSN: 0914-9201

DAY: 16

MONTH: Oct

YEAR: 2003

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LANGUAGE: eng

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AFFILIATION: Graduate School of Life Sciences, Tohoku University.

Country: Japan

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MEDLINETA: Biol Sci Space

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