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Nodule senescence in Medicago truncatula

Juan Carlos Pérez Guerra (2007)
abstract
This work consists of a fundamental study of nodule senescence in indeterminate nodules of Medicago truncatula. It mainly concerns the morphological and molecular characterization of the nodule senescence. Understanding this process may provide important information for modulation of this program, in order to prolong the nodule’s functional lifespan. Natural nodule senescence (chapter 3) was morphologically characterized, determining the corresponding cell degradation stages. The cDNA-AFLP technique was used to obtain a natural nodule senescence related dataset of 508 gene tags. Some attempts to modulate nodule senescence using genes selected from the dataset were made (Addendum). Stress induced nodule senescence, specifically dark stress (chapter 4), was also characterized morphologically, determining the similarities and differences with natural nodule senescence. Gene expression of several natural nodule senescence related genes was analyzed during dark induced nodule senescence, demonstrating the differences at molecular level between these processes, which might sequestrate different metabolic mechanisms. A specific cysteine protease gene family, highly abundant during nodule senescence, was studied in more detail (chapter 5). These proteins could have evolved to specifically degrade symbiosomes during nodule senescence. In chapter 6, a nodule senescence model is proposed were a number of hypothesis are integrated to explain the initiation and progression of the senescence zone, suggesting the next steps in this research.
Please use this url to cite or link to this publication:
author
promoter
UGent and UGent
organization
year
type
dissertation (monograph)
subject
pages
143 pages
publisher
Ghent University. Faculty of Sciences
place of publication
Ghent, Belgium
defense location
Zwijnaarde : Technologiepark (FSVM building)
defense date
2007-12-21 14:00
language
English
UGent publication?
yes
classification
D1
additional info
dissertation consists of copyrighted material
copyright statement
I have transferred the copyright for this publication to the publisher
id
3007674
handle
http://hdl.handle.net/1854/LU-3007674
date created
2012-10-05 15:02:49
date last changed
2012-10-08 15:20:17
@phdthesis{3007674,
  abstract     = {This work consists of a fundamental study of nodule senescence in indeterminate nodules of Medicago truncatula. It mainly concerns the morphological and molecular characterization of the nodule senescence. Understanding this process may provide important information for modulation of this program, in order to prolong the nodule{\textquoteright}s functional lifespan. Natural nodule senescence (chapter 3) was morphologically characterized, determining the corresponding cell degradation stages. The cDNA-AFLP technique was used to obtain a natural nodule senescence related dataset of 508 gene tags. Some attempts to modulate nodule senescence using genes selected from the dataset were made (Addendum). Stress induced nodule senescence, specifically dark stress (chapter 4), was also characterized morphologically, determining the similarities and differences with natural nodule senescence. Gene expression of several natural nodule senescence related genes was analyzed during dark induced nodule senescence, demonstrating the differences at molecular level between these processes, which might sequestrate different metabolic mechanisms. A specific cysteine protease gene family, highly abundant during nodule senescence, was studied in more detail (chapter 5). These proteins could have evolved to specifically degrade symbiosomes during nodule senescence. In chapter 6, a nodule senescence model is proposed were a number of hypothesis are integrated to explain the initiation and progression of the senescence zone, suggesting the next steps in this research.},
  author       = {P{\'e}rez Guerra, Juan Carlos},
  language     = {eng},
  pages        = {143},
  publisher    = {Ghent University. Faculty of Sciences},
  school       = {Ghent University},
  title        = {Nodule senescence in Medicago truncatula},
  year         = {2007},
}

Chicago
Pérez Guerra, Juan Carlos. 2007. “Nodule Senescence in Medicago Truncatula”. Ghent, Belgium: Ghent University. Faculty of Sciences.
APA
Pérez Guerra, J. C. (2007). Nodule senescence in Medicago truncatula. Ghent University. Faculty of Sciences, Ghent, Belgium.
Vancouver
1.
Pérez Guerra JC. Nodule senescence in Medicago truncatula. [Ghent, Belgium]: Ghent University. Faculty of Sciences; 2007.
MLA
Pérez Guerra, Juan Carlos. “Nodule Senescence in Medicago Truncatula.” 2007 : n. pag. Print.