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Abstract Detail



Plant Resilience to Climate Challenges

Roy Choudhury, Swarup [1], Pandey, Sona [1].

PLDα1 is a key component and regulator of G-protein mediated ABA signaling.

Heterotrimeric G-proteins comprised of Gα, Gβ and Gγ proteins are important signal transducers in all eukaryotes. In plants, G-proteins are involved in the regulation of multiple biotic and abiotic stresses as well as many developmental processes, even though their repertoire is significantly limited compared to metazoan systems. One Gα, one Gβ and three Gγ proteins represent the heterotrimeric G-protein complex in Arabidopsis and a single regulatory protein, RGS, is one of the few known biochemical regulators of this signaling complex. This quantitative disparity between the number of signaling components and the range of processes they regulate is rather intriguing. We now present evidence that phospholipase Dα1 protein is a key component and regulator of G-protein complex, especially during ABA signaling. We also show that the same G-protein subunits and their regulators exhibit distinct biochemical and genetic interactions depending on the specific signal. Such biochemical plasticity and interaction specificity likely compensates for the lack of multiplicity of individual subunits, and helps to fine-tune the plants’ response to constantly changing environments.


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1 - Donald Danforth Plant Science Center, 975 N. Warson Road, St. Louis, MO, 63132, USA

Keywords:
ABA
G-proteins
PLDα1.

Presentation Type: Symposium Presentation
Session: SY18
Location: Hall A/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 4:15 PM
Number: SY18007
Abstract ID:512
Candidate for Awards:None


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