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.