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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Characterization of gibberellin-signalling elements during plum fruit ontogeny defines the essentiality of gibberellin in fruit development
Plant Molecular Biology, Volume 84, No. 4-5, Year 2014
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Description
Fruit growth is a coordinated, complex interaction of cell division, differentiation and expansion. Gibberellin (GA) involvement in the reproductive events is an important aspect of GA effects. Perennial fruit-trees such as plum (Prunus salicina L.) have distinct features that are economically important and provide opportunities to dissect specific GA mechanisms. Currently, very little is known on the molecular mechanism(s) mediating GA effects on fruit development. Determination of bioactive GA content during plum fruit ontogeny revealed that GA1 and GA4 are critical for fruit growth and development. Further, characterization of several genes involved in GA-signalling showed that their transcriptional regulation are generally GA-dependent, confirming their involvement in GA-signalling. Based on these results, a model is presented elucidating how the potential association between GA and other hormones may contribute to fruit development. PslGID1 proteins structure, Y2H and BiFC assays indicated that plum GA-receptors can form a complex with AtDELLA-repressors in a GA-dependent manner. Moreover, phenotypical-, molecular- and GA-analyses of various Arabidopsis backgrounds ectopically expressing PslGID1 sequences provide evidence on their role as active GA-signalling components that mediate GA-responsiveness. Our findings support the critical contribution of GA alone or in association with other hormones in mediating plum fruit growth and development. © 2013 Springer Science+Business Media Dordrecht.
Authors & Co-Authors
El-Sharkawy, Islam
Canada, Guelph
University of Guelph
Egypt, Damanhour
Damanhour University
Sherif, Sherif M.
Canada, Guelph
University of Guelph
Egypt, Damanhour
Damanhour University
El Kayal, Walid
Canada, Edmonton
University of Alberta
Egypt, Alexandria
Alexandria University
Mahboob, Abdulla Azzam
Canada, St. Catharines
Brock University
Abubaker, Kamal S.
Canada, Guelph
University of Guelph
Ravindran, Pratibha
Singapore, Singapore City
National University of Singapore
Jyothi-Prakash, Pavithra A.
Singapore, Singapore City
National University of Singapore
Kumar, Prakash P.
Singapore, Singapore City
National University of Singapore
Subramanian, Jayasankar
Canada, Guelph
University of Guelph
Statistics
Citations: 25
Authors: 9
Affiliations: 6
Identifiers
Doi:
10.1007/s11103-013-0139-8
ISSN:
01674412
Research Areas
Sexual And Reproductive Health