東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Seedling stress tolerance requires t...

Garcia, Mary Emily.

Linked to FindBook

Google Book

Amazon

博客來

Seedling stress tolerance requires the action of a unique family of plant-specific proteins.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Seedling stress tolerance requires the action of a unique family of plant-specific proteins./
Author:	Garcia, Mary Emily.
Description:	142 p.
Notes:	Adviser: Ruth Finkelstein.
Contained By:	Dissertation Abstracts International68-02B.
Subject:	Biology, Molecular. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3252815

Seedling stress tolerance requires the action of a unique family of plant-specific proteins.
Garcia, Mary Emily.

Seedling stress tolerance requires the action of a unique family of plant-specific proteins. - 142 p.

Adviser: Ruth Finkelstein.

Thesis (Ph.D.)--University of California, Santa Barbara, 2007.

When threatened by severe environmental conditions, plants enhance their chances of survival by activating stress response pathways. The plant hormone abscisic acid (ABA) is a key player in the regulation of stress response as well as other developmental processes such as seed maturation. ABA signaling has been demonstrated to act in part via the transcription factor ABI5 ( ABA Insensitive 5). To better understand how ABI5 activity is regulated by ABA signaling, a screen for ABI5 interacting proteins was performed, which identified a plant-specific protein family [ABI Five Binding Protein (AFP) Family] of unknown function. This dissertation work addresses several questions about this family. Are the AFPs involved in mediating ABA/stress response? If so, how do their interactions with ABI5 affect this process? Finally, do the AFPs function redundantly? The genes encoding the AFPs have different expression patterns in seeds and seedlings and older tissues exposed to stress. Loss-of-function lines have varying sensitivities to ABA, sugar, and salt stresses as well as effects on ABI5-dependent and -independent gene expression. The AFPs also appear to interact to varying extents vii with other members of the ABI5/ABF/AREB family of transcription factors. Taken together, these findings suggest that different AFPs act throughout development and respond to assorted stress cues in order to regulate seed maturation and stress tolerance.Subjects--Topical Terms:

1017719
Biology, Molecular.

Seedling stress tolerance requires the action of a unique family of plant-specific proteins.
LDR:03167nam 2200277 a 45 001 939554
005 20110517
008 110517s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI3252815
035 $a AAI3252815
040 $a UMI $c UMI
100 1 $a Garcia, Mary Emily. $3 1263657
245 1 0 $a Seedling stress tolerance requires the action of a unique family of plant-specific proteins.
300 $a 142 p.
500 $a Adviser: Ruth Finkelstein.
500 $a Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 0772.
502 $a Thesis (Ph.D.)--University of California, Santa Barbara, 2007.
520 $a When threatened by severe environmental conditions, plants enhance their chances of survival by activating stress response pathways. The plant hormone abscisic acid (ABA) is a key player in the regulation of stress response as well as other developmental processes such as seed maturation. ABA signaling has been demonstrated to act in part via the transcription factor ABI5 ( ABA Insensitive 5). To better understand how ABI5 activity is regulated by ABA signaling, a screen for ABI5 interacting proteins was performed, which identified a plant-specific protein family [ABI Five Binding Protein (AFP) Family] of unknown function. This dissertation work addresses several questions about this family. Are the AFPs involved in mediating ABA/stress response? If so, how do their interactions with ABI5 affect this process? Finally, do the AFPs function redundantly? The genes encoding the AFPs have different expression patterns in seeds and seedlings and older tissues exposed to stress. Loss-of-function lines have varying sensitivities to ABA, sugar, and salt stresses as well as effects on ABI5-dependent and -independent gene expression. The AFPs also appear to interact to varying extents vii with other members of the ABI5/ABF/AREB family of transcription factors. Taken together, these findings suggest that different AFPs act throughout development and respond to assorted stress cues in order to regulate seed maturation and stress tolerance.
520 $a In addition to demonstrating that functional redundancy may exist in the AFP family, as AFP1 and AFP2 both appear to be negative regulators of ABA response by affecting ABI5 protein accumulation, this work provides evidence that AFP2 may regulate the activity of ABI5 versus absolute protein levels. This raises an important question. Why would a negative regulator of ABI5 activity be active during a time when ABI5 is needed for stress response? I propose that, within a population of seeds, subtle differences in AFP2 and ABI5 activities result in differential responses to stress. Therefore, some seeds germinate, when AFP2 is active, and some remain in an arrested state, when ABI5 is active. In the presence of stress, this somewhat stochastic process ensures the best chances of survival for the population.
590 $a School code: 0035.
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Plant Physiology. $3 1017865
690 $a 0307
690 $a 0817
710 2 $a University of California, Santa Barbara. $3 1017586
773 0 $t Dissertation Abstracts International $g 68-02B.
790 $a 0035
790 1 0 $a Finkelstein, Ruth, $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3252815