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Roles of miRNAs in Arabidopsis stres...

Thatcher, Shawn.

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Roles of miRNAs in Arabidopsis stress response and senescence.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Roles of miRNAs in Arabidopsis stress response and senescence./
作者:	Thatcher, Shawn.
面頁冊數:	144 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-01(E), Section: B.
Contained By:	Dissertation Abstracts International75-01B(E).
標題:	Chemistry, Biochemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3594985
ISBN:	9781303398742

Roles of miRNAs in Arabidopsis stress response and senescence.
Thatcher, Shawn.

Roles of miRNAs in Arabidopsis stress response and senescence. - 144 p.

Source: Dissertation Abstracts International, Volume: 75-01(E), Section: B.

Thesis (Ph.D.)--University of Delaware, 2013.

Environmental stress currently contributes to approximately 50% of crop loss occurring world-wide, with climate change expected to exacerbate this problem. Genomic studies have shown that differences in stress tolerance arise not only from the presence or absence of stress-associated genes but also from their regulation. In plants, miRNAs are key gene regulators that have been shown to control various developmental processes and responses to environmental stresses. In order to further assess the role of miRNAs in environmental stress, a series of stress treatments was carried out in Arabidopsis thaliana . Comparisons between small RNA populations of different tissues, mutants and stresses were made via the construction, sequencing and analysis of more than 25 small RNA libraries, resulting in over 150 million sequences. Through this method, many new miRNAs from annotated miRNA precursors were found. Additionally, some miRNAs and their target genes were shown to be regulated in a novel manner under stress conditions. A separate analysis of leaves and siliques over the course of senescence revealed opposite regulation of nutrient responsive miRNAs, the first indication that miRNAs play a role in the mobilization of resources from vegetative to reproductive tissue during aging. Differential expression of miRNAs and targets which affect cell wall integrity, including the discovery of a regulated miRNA that targets the alpha tubulin family, also implicate miRNAs in the alteration of cell structure which occurs in senescence. Taken together these results greatly increase the current knowledge about how plants use miRNAs to adapt to stress and control aging.

ISBN: 9781303398742Subjects--Topical Terms:

1017722
Chemistry, Biochemistry.

Roles of miRNAs in Arabidopsis stress response and senescence.
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