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Exploring the Roles of Auxin Transpo...

Cowling, Craig Leroy,

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Exploring the Roles of Auxin Transport and Stigmasterol in Plant Development /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Exploring the Roles of Auxin Transport and Stigmasterol in Plant Development // Craig Leroy Cowling.
作者:	Cowling, Craig Leroy,
面頁冊數:	1 electronic resource (138 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-12, Section: A.
Contained By:	Dissertations Abstracts International86-12A.
標題:	Plant sciences. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31994912
ISBN:	9798286431359

Exploring the Roles of Auxin Transport and Stigmasterol in Plant Development /
Cowling, Craig Leroy,

Exploring the Roles of Auxin Transport and Stigmasterol in Plant Development /Craig Leroy Cowling. - 1 electronic resource (138 pages)

Source: Dissertations Abstracts International, Volume: 86-12, Section: A.

Plants are essential for nearly every ecosystem, functioning as a primary food source, producing oxygen, regulating climate, filtering water, and shaping landscapes. Because most plants are unable to move freely, plants must adapt to their environment to survive. How plants grow and respond to their environment has been extensively studied, yet the complexity of plant biology leaves many mysteries unanswered. Hormones such as auxin and sterols are key influencers of plant development and environmental responses. This research focused on addressing key knowledge gaps in the hormone biology field using model plants Zea mays (maize) and Arabidopsis thaliana (thale cress). First, this study characterizes the roles of the evolutionarily conserved PIN-LIKES (PILS) auxin transporters, PILS2 and PILS6, in determining plant architecture traits in Arabidopsis and maize. Molecular and genetic analyses of the maize and Arabidopsis orthologs indicates that these two PILS orthologs have unique and non-redundant functions in organ formation. These findings highlight the importance of these proteins in maintaining auxin gradients within growing organs such as roots and shoots for proper organ size and formation. Additionally, this work investigated the role of one phytosterol, stigmasterol, in abiotic stress response. CYP710A8 is the final enzyme in stigmasterol biosynthesis in maize. An analysis of stigmasterol-deficient transcriptome shows significant changes in gene expression related to abiotic stress. Stigmasterol-deficient plants exhibit enhanced tolerance to salt stress, with altered levels of phytohormones, suggesting a compensatory mechanism that enhances resilience. This indicates that manipulating sterol biosynthetic pathways could be a strategy for developing stress-resilient crops without compromising growth under optimal conditions. These studies provide insights into the molecular mechanisms of plant growth and stress responses, emphasizing the roles of auxin transport and sitosterol to stigmasterol conversion. The research offers potential strategies for crop improvement, highlighting the significance of auxin homeostasis in organ size control and the potential of sterol engineering in enhancing stress tolerance. These findings contribute to our understanding of plant biology and the development of innovative approaches to improve agricultural productivity and sustainability.

English

ISBN: 9798286431359Subjects--Topical Terms:

3173832
Plant sciences.
Subjects--Index Terms:

Auxin

Exploring the Roles of Auxin Transport and Stigmasterol in Plant Development /
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