บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

GA3 effects on postharvest alterations in cell membranes of rose (Rosa x hybrida) petals.

Sabehat, A.; Zieslin, N.;

Journal of Plant Physiology Year: 1994 Vol: 144 Issue: 4-5 Pages: 513-517 Ref: 22 ref.

1994

บทคัดย่อ

GA3 effects on postharvest alterations in cell membranes of rose (Rosa x hybrida) petals.

ABSTRACT

The postharvest increase in leakage of electrolytes from detached petals of flowers of the rose cultivars Mercedes, Sonata and Golden Times, was suppressed following inhibition for 24 h in 20 mg GA3/litre, while leakage from petals of cv. Madelon was not affected by the GA3 treatment. Similar suppression of leakage was also present when flower buds of Mercedes and Sonata were sprayed with 350 mg GA3/litre (1 mM). Postharvest decline of cell membrane fluidity and, to a larger extent, the decrease in membrane protein content were also suppressed following GA3 application. In both control and GA3-treated petals, the decrease in membrane fluidity preceded the increase in ion leakage. The time-course of this decrease coincided well with the time-course of the increase in membrane permeability in the control petals, but not in the petals from GA3-treated flowers. On the other hand, the time-course of the increase in membrane permeability corresponded well with the decrease in content of membrane prote

in in both control and GA3-treated petals. The decrease in content of total protein in petals of GA3-treated flowers was lower than that of control flowers. Comparison of electrophoretic protein profiles from both control and GA3-treated petals showed that the postharvest decomposition of proteins was inhibited by the GA3 treatment. The involvement of gibberellins in maintaining membrane integrity of rose flowers is discussed.