Studies on soluble carbohydrates in yellow lupin (Lupinus luteus L.) seeds of different age

Abstract

Yellow lupin seeds cv. Juno were stored under laboratory conditions for 2 month, 4, 6 and 8 years. Eighteen soluble carbohydrates were identified in embryonic axes and cotyledons of different age seeds. The concentration of soluble carbohydrates in analysed seeds ranged from 25 to 34% of dry mass. Axes contained more carbohydrates than cotyledons. Stachyose dominated in axes, and verbascose in cotyledons. Other detected galactosides were: galactinol, galactosyl pinitols and galactosyl chiro-inositols (fagopyritols), but their content was several-fold lower than that of RFOs (in both axes and cotyledons tissues). The concentration of soluble carbohydrates indicated, that sucrose to RFOs mass ratio, or other changes in sugars composition are not indicators of seed storage.

The occurrence and accumulation of d-pinitol in fenugreek (Trigonella foenum graecum L.)

“…Accordingly, the concentrations of free cyclitols increased (Table 1). In germinating yellow lupin seeds, the concentration of d-pinitol decreased during the first 2 days of germination, and an increase in d-chiro-inositol (a product of d-pinitol demethylation) was noted (Zalewski et al 2007). In germinating seeds of soybean (Gu et al 2017), yellow lupin (Górecki et al 1997) and winter vetch (Lahuta and Górecki 2011), the concentration of d-pinitol increased due to the degradation of galactosyl pinitols.…”