บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Calcium regulation of senescence in rose petals.

Torre, S.; Borochov, A.; Halevy, A. H.;

Physiologia Plantarum Year: 1999 Vol: 107 Issue: 2 Pages: 214-219 Ref: 25 ref.

1999

บทคัดย่อ

Calcium regulation of senescence in rose petals.

Rose plants grown at high RH produce flowers with a shorter vase life than those grown at low RH, and the Ca content of the former is lower than that of the latter. In whole cut flowers and in detached petals of cultivars Mercedes and Baroness, CaCl2 treatment promoted bud-opening and delayed senescence. The treated flowers stayed turgid and continued their initial postharvest growth for longer periods of time. The membrane protein content in detached petals decreased with time, in parallel to the decline in membrane phospholipids (PLs). Ca treatment delayed the decrease in both membrane proteins and PL and increased ATPase activity in the aging petals. Electrolyte leakage, which is a reliable indicator of petal-membrane senescence, was delayed in Ca-treated flowers. Ca treatments also suppressed ethylene production with age. It is suggested that the Ca-induced delay in petal senescence involves the protection of membrane proteins and PLs from degradation, thus preserving the integrity of the me

mbranes, reducing ethylene production, and hence maintaining solute transport and tissue vitality.