Author(s):

Jagdishchandra Monpara, Kiran Chudasama and Vrinda Thaker

Abstract: In the present study two soybean (Glycine max) varieties are selected; Large seeded variety (L seed) and Small seeded variety (S seed) for the growth and wall component analysis to understand the mechanism of sink size development in the developing seed. Changes in low and high molecular weight xyloglucan and pectic polysaccharide content were estimated during seed development in soybean. The seeds of both the varieties showed distinct difference in their growth phases, a significant difference was also observed in cell wall components during their developmental period. Pectic (Esterified and non-esterified) and xyloglucan (high and low molecular weight) remained higher in S seed variety compared to L seed during sink development phase. Overall, a maximum pectic substance was observed at the sink expansion and DMA phases in both seed varieties. While xyloglucan was observed higher in sink expansion phase in small and large seeds. The probable role of wall components in sink size development is discussed.

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