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Regulation of two germin-like protein genes during plum fruit development

El-Sharkawy, Islam and Mila, Isabelle and Bouzayen, Mondher and Jayasankar, Subramanian Regulation of two germin-like protein genes during plum fruit development. (2010) Journal of Experimental Botany, vol. 61 (n° 6). pp. 1761-1770. ISSN 0022-0957

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Official URL: http://dx.doi.org/10.1093/jxb/erq043

Abstract

Germin-like proteins (GLPs) have several proposed roles in plant development and defence. Two novel genes (Ps-GLP1 and 2) encoding germin-like protein were isolated from plum (Prunus salicina). Their regulation was studied throughout fruit development and during ripening of early and late cultivars. These two genes exhibited similar expression patterns throughout the various stages of fruit development excluding two important stages, pit hardening (S2) and fruit ripening (S4). During fruit development until the ripening phase, the accumulation of both Ps-GLPs is related to the evolution of auxin. However, during the S2 stage only Ps-GLP1 is induced and this could putatively be in a H2O2-dependent manner. On the other hand, the diversity in the Ps-GLPs accumulation profile during the ripening process seems to be putatively due to the variability of endogenous auxin levels among the two plum cultivars, which consequently change the levels of autocatalytic ethylene available for the fruit to co-ordinate ripening. The effect of auxin on stimulating ethylene production and in regulating Ps-GLPs transcripts was also investigated. These data, supported by their localization in the extracellular matrix, suggest that auxin is somehow involved in the regulation of both transcripts throughout fruit development and ripening.

Item Type:Article
Additional Information:Thanks to Oxford University Press editor. The definitive version is available at http://jxb.oxfordjournals.org The original PDF of the article can be found at Journal of Experimental Botany website : http://jxb.oxfordjournals.org/content/61/6/1761
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
French research institutions > Institut National de la Recherche Agronomique - INRA
Other partners > University of Guelph (CANADA)
Other partners > Vineland Research and Innovation Centre (CANADA)
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Deposited By: Brigitte LAFFORGUE

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