บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Copper reverses silver inhibition of flower senescence in Petunia hybrida.

Knee, M.;

Postharvest Biology and Technology Year: 1995 Vol: 6 Issue: 1/2 Pages: 121-128 Ref: 9 ref.

1995

บทคัดย่อ

Copper reverses silver inhibition of flower senescence in Petunia hybrida.

 

The action of metal ions on detached flowers of P. hybrida was investigated to determine how they affected ethylene-promoted senescence. Salts of various metals were applied singly or in combination by immersion for 5 s of excised flowers which were then incubated in 1 micro l ethylene/litre for 24 h. Of the metals tested, only Ag+ prevented ethylene-induced senescence. Cu2+ and Cd2+ completely, and Hg2+ and Fe2+ partially reversed the effect of Ag+. K+, Na+, Ca2+, Mg2+, Al3+, Co2+, Mn2+ and Zn2+ were ineffective. Cu2+ promoted ethylene synthesis, such that senescence was not affected by ethylene treatment unless flowers had been pre-treated with aminoethoxyvinylglycine. Ag+ inhibited the promotion of respiration and ethylene production resulting from ethylene treatment of corolla tissue. Cu2+ treatment restored these ethylene effects in Ag+-treated tissue. The action of Cu2+ suggests that ethylene signal perception occurred in Ag+-treated corolla tissue.