Endosperm variation and fresh to dry weight ratio during Trigonella persica germination

Trigonella persica Boiss. is an annual herbaceous plant of Fabaceae family, which is considered as one of the endemic species of Iran (legumes). This aromatic plant has cylindrical long stem (30-60 cm), pinkish color, shoulder leaves, three leaflets and triangular shapes stipule. Galactomannans are heterogeneous polysaccharides consisting of galactose and mannose subunits. In the family of legumes, galactomannans of the endospermic cell wall have a largely conserved role, and their abundance in the seed is such that in many species of this family, formed the main part of the grains dry weight Galactomannan in Trigonella persica Boiss. Seeds (as the major component of the cell wall) endosperm decreases with the advent of germination days. Endosperm plays an important role in absorbing water and preventing water stress in the germinating seed due to the presence of polysaccharides. In this research, with the aim of measuring the T. persica seeds galactomannan in the first three days of germination, the amount of dry and, fresh weight of endosperm in dry seeds (non-germinated seeds) and germinating seed at 24.48.72 after the imbibition was investigated. According to the results, the endosperm of seed germinating at 48 hours (after imbibition) had the heist dry weight and due to the presence of galactomannans, the fresh to dry weight ratio of the endosperm in 48 hours after imbibition was the highest. Also, radicle fresh to dry weight ratio along with growth (in during germination) increased but cotyledons weight variation in during germination there is no significant relationship between fresh to dry weight ratio.

Keywords:

T. persica , Galactomannan , Germination , Endosperm