Expression of sucrose synthase in the developing endosperm is essential for early seed development in cotton

Functional Plant Biology : FPB
Yong-Ling RuanRobert T Furbank

Abstract

Successful seed development requires coordinated interaction of the endosperm and embryo. In most dicotyledonous seeds, the endosperm is crushed and absorbed by the expanding embryo in the later stages of seed development. Little is known about the metabolic interaction between the two filial tissues early in seed development. We examined the potential role of sucrose synthase (Sus) in the endosperm development of cotton. Sus was immunologically localised in the cellularising endosperm, but not in the heart-stage embryo at 10 days after anthesis. The activities of Sus and acid invertase were significantly higher in the endosperm than in the young embryos, which corresponded to a steep concentration difference in hexoses between the endosperm and the embryo. This observation indicates a role for the endosperm in generating hexoses for the development of the two filial tissues. Interestingly, Sus expression and starch deposition were spatially separated in the seeds. Silencing the expression of Sus in the endosperm using an RNAi approach led to the arrest of early seed development. Histochemical analyses revealed a significant reduction in cellulose and callose in the deformed endosperm cells of the Sus-suppressed seed. The data ...Continue Reading

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Citations

May 31, 2013·Journal of Integrative Plant Biology·Yong-Ling Ruan
Mar 4, 2014·Annual Review of Plant Biology·Yong-Ling Ruan
May 13, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Muhammad AbdullahYongping Cai
Oct 24, 2014·Frontiers in Plant Science·Sonia OsorioAlisdair R Fernie
May 8, 2018·Plant Reproduction·Manuel AguirreIgnacio Ezquer
Oct 16, 2020·Scientific Reports·José G VallarinoAlisdair R Fernie

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