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Control of plant cell shape by irreg...

University of Florida.

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Control of plant cell shape by irregular trichome branch genes in Arabidopsis.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Control of plant cell shape by irregular trichome branch genes in Arabidopsis./
作者:	Zhang, Xiaoguo.
面頁冊數:	178 p.
附註:	Adviser: David G. Oppenheimer.
Contained By:	Dissertation Abstracts International69-06B.
標題:	Biology, Cell. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3322969
ISBN:	9780549726968

Control of plant cell shape by irregular trichome branch genes in Arabidopsis.
Zhang, Xiaoguo.

Control of plant cell shape by irregular trichome branch genes in Arabidopsis. - 178 p.

Adviser: David G. Oppenheimer.

Thesis (Ph.D.)--University of Florida, 2008.

The control of plant cell shape is fundamentally important not only for the function of individual cells, but also for the morphogenesis of whole plants. The Arabidopsis leaf trichome is used as a cell model for genetic screens of mutations, called irregular trichome branch (itb) and disproportionate ( dpp), which cause changes in trichome shape. Five genes ( ITB1-ITB4 and DPP) were cloned through a positional cloning strategy and the functions of these genes were characterized in this study.

ISBN: 9780549726968Subjects--Topical Terms:

1017686
Biology, Cell.

Control of plant cell shape by irregular trichome branch genes in Arabidopsis.
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245 1 0 $a Control of plant cell shape by irregular trichome branch genes in Arabidopsis.
300 $a 178 p.
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502 $a Thesis (Ph.D.)--University of Florida, 2008.
520 $a The control of plant cell shape is fundamentally important not only for the function of individual cells, but also for the morphogenesis of whole plants. The Arabidopsis leaf trichome is used as a cell model for genetic screens of mutations, called irregular trichome branch (itb) and disproportionate ( dpp), which cause changes in trichome shape. Five genes ( ITB1-ITB4 and DPP) were cloned through a positional cloning strategy and the functions of these genes were characterized in this study.
520 $a ITB1 is a plant homolog of the actin-related protein2/3 complex activator Scar/WAVE, which regulates actin and microtubule organization. Disruption of ITB1 causes disorganization of actin filaments and microtubules, generating distorted trichomes. ITB2 is a putative member of the aminophospholipid translocase (ALA) family. Mutations in this gene result in defective trichomes with reduced branch length. ITB3 is a plant-specific protein that regulates actin organization through interaction with actin depolymerizing factor (ADF). The absence of ITB3 severely changes actin cytoskeleton organization by forming actin rings, but no change was observed in microtubule organization. The trichomes in itb3 mutants are reduced in size and branch length. ITB4 is the plant homolog of cleavage stimulation factor 64 that influences not only trichome morphogenesis, but also floral development. Compared to wild type, mutations in ITB4 reduce the trichome branch number and increase sepal and petal numbers. DPP is a keto acyl reductase and is involved in trichome cell expansion. Mutations homozygous for dpp are lethal. At the restrictive temperature (22°C), heterozygous plants of the dpp mutants display trichomes with reduced branch length and increased stalk length. Although the five gene products described above have different functions in plant cells, their mutations all cause changes in Arabidopsis leaf trichome shape. These results indicate that plant cell shape can be controlled by different genes with a wide range of functions on multiple dynamic cell processes such as cytoskeleton dynamics and endomembrane dynamics.
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