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Dissertation Jigar Patel 4-30-15.pdf (4.76 MB)

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The Role of Polyamine Uptake Transporters on Growth and Development of Arabidopsis Thaliana

Patel, Jigarkumar J.
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1429280174

Abstract Details

2015, Doctor of Philosophy (Ph.D.), Bowling Green State University, Biological Sciences.
Transgenic manipulation of polyamine levels has provided compelling evidence that polyamines enable plants to respond to environmental cues by activation of stress and developmental pathways. Here we show that the chloroplasts of A. thaliana and soybeans contain both an arginine decarboxylase, and an arginase/agmatinase. These two enzymes combine to synthesize putrescine from arginine. Since the sequences of plant arginases show conservation of key residues and the predicted 3D structures of plant agmatinases overlap the crystal structure of the enzyme from Deinococcus radiodurans, we suggest that these enzymes can synthesize putrescine, whenever they have access to the substrate agmatine. Finally, we show that synthesis of putrescine by ornithine decarboxylase takes place in the ER. Thus A. thaliana has two, and soybeans have three separate pathways for the synthesis of putrescine. This study also describes key changes in plant phenotypes in response to altered transport of polyamines.
Morris Paul (Advisor)
Phuntumart Vipaporn (Committee Member)
Rogers Scott (Committee Member)
Larsen Ray (Committee Member)
Wendy Manning (Committee Member)
120 p.
Biology; Plant Biology
Polyamines; Polyamine Transporters; Putrescine biosynthesis

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Citations

  • Patel, J. J. (2015). The Role of Polyamine Uptake Transporters on Growth and Development of Arabidopsis Thaliana [Doctoral dissertation, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1429280174

    APA Style (7th edition)

  • Patel, Jigarkumar. The Role of Polyamine Uptake Transporters on Growth and Development of Arabidopsis Thaliana. 2015. Bowling Green State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1429280174.

    MLA Style (8th edition)

  • Patel, Jigarkumar. "The Role of Polyamine Uptake Transporters on Growth and Development of Arabidopsis Thaliana." Doctoral dissertation, Bowling Green State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1429280174

    Chicago Manual of Style (17th edition)

bgsu1429280174
596
© 2015, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.