Floral bud damage compensation by branching and biomass allocation in genotypes of Brassica napus with different architecture and branching potential

Frontiers in Plant Science
Amélie PinetAlexandra Jullien

Abstract

Plant branching is a key process in the yield elaboration of winter oilseed rape (WOSR). It is also involved in plant tolerance to flower damage because it allows the setting of new fertile inflorescences. Here we characterize the changes in the branching and distribution of the number of pods between primary and secondary inflorescences in response to floral bud clippings. Then we investigate the impacts of the modifications in branching on the biomass allocation and its consequence on the crop productivity (harvest index). These issues were addressed on plants with contrasted architecture and branching potential, using three genotypes (Exocet, Pollen, and Gamin) grown under two levels of nitrogen fertilization. Clipping treatments of increasing intensities were applied to either inflorescences or flower buds. We were able to show that restoration of the number of pods after clipping is the main lever for the compensation. Genotypes presented different behaviors in branching and biomass allocation as a function of clipping treatments. The number of fertile ramifications increased for the high intensities of clipping. In particular, the growth of secondary ramifications carried by branches developed before clipping has been obs...Continue Reading

References

Jul 16, 2008·BMC Bioinformatics·Carolin StroblAchim Zeileis
Feb 3, 2009·Trends in Ecology & Evolution·Benjamin M BolkerJada-Simone S White
Jun 11, 2011·Trends in Plant Science·Jochem B EversPaul C Struik
Feb 1, 2012·Journal of Experimental Botany·Emma BennettCarol Wagstaff
Feb 4, 2014·Journal of Plant Physiology·Pierre-Maxime FuretAlain Vian
Feb 11, 2014·Current Opinion in Plant Biology·Bart J JanssenKimberley C Snowden
Feb 11, 2014·Current Opinion in Plant Biology·Soon Ju ParkZachary B Lippman
Apr 9, 2014·Proceedings of the National Academy of Sciences of the United States of America·Michael G MasonChristine A Beveridge

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Software Mentioned

ClipFB
Exocet
R
ClipInflo
Gamin

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