Involvement of Beneficial Microbe-derived Cyclodipeptides (CDPs) in Promoting Plant Tolerance to Abiotic Stresses
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MS Thesis
Type
ThesisAuthors
abdulhakim, fatimah
Advisors
Hirt, Heribert
Committee members
Merzaban, Jasmeen
Al-Babili, Salim

Saad, Maged M.
Abulfaraj, Alaa
Program
Plant ScienceKAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionDate
2020-07Embargo End Date
2020-07-23Permanent link to this record
http://hdl.handle.net/10754/664387
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At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2020-07-23.Abstract
Cyclodipeptides (CDPs) are the smallest, most stable cyclic peptides that are synthesized as secondary metabolites by bacteria. The aim of this study was to investigate the effect of the Pseudomonas argentinensis (SA190) and four (CDPs), named as cis-cyclo-(Pro-Phe) (Cyclo2), cis-cyclo-(Pro-Leu) (Cyclo3), cis-cyclo-(Pro-Tyr) (Cyclo4) and cis-cyclo-(Pro-Val) (Cyclo5), with three concentrations (1µM, 100nM, and 10nM), on the growth of Arabidopsis thaliana under normal plant growth conditions [1/2MS media], salt conditions [125 mM NaCl] and drought conditions [25% PEG]. Moreover, we determined the most effective CDPs with optimal concentration. It was found that cis-cyclo-(Pro-Tyr) (Cyclo4) at a concentration of 100nM had an effect on the plant growth and can mimic the effect of SA190 under normal [1/2MS media] conditions. Also, cis-cyclo-(Pro-Tyr) (Cyclo4) at a concentration of 1µM can mimic the effect of SA190 under salt conditions [125mM NaCl]. Finally, cis-cyclo-(Pro-Val) (Cyclo5) at a concentration of 1µM can mimic the effect of SA190 under drought conditions [25% PEG].Citation
Abdulhakim, F. (2020). Involvement of Beneficial Microbe-derived Cyclodipeptides (CDPs) in Promoting Plant Tolerance to Abiotic Stresses. KAUST Research Repository. https://doi.org/10.25781/KAUST-G0A22ae974a485f413a2113503eed53cd6c53
10.25781/KAUST-G0A22