Figure 2.

Trehalase activity in various developmental stages of flowers. Arabidopsis plants were grown in a greenhouse. Flowers of different developmental stages were harvested between 4 and 6 weeks after germination. These stages are referred to as bud young (sepals still closed, no petals visible), bud old (tips of petals visible), flower young (petals open), flower old (stigma beginning to elongate, but petals still present), silique young (siliques <1 cm long, green), silique green (siliques >1 cm long, green), and silique old (yellow-brown). Trehalase activity was measured (pH 6.3, 37°C) in crude extracts. Mean values ± se are given for six independent samples.