Relationships between flower quality and postharvest performance: water and sugar contents in floral organs in spray type of cut carnation flower.
Miura, Y.; Sekijima, K.; Hirai, T.; Igarashi, D.; Inoue, T.; Uematsu, H.; Kuboi, S.; Matuyama, A.; Yoshida, M.; Suzuki, A.;
Journal of the Japanese Society for Horticultural Science Year: 2000 Vol: 69 Issue: 4 Pages: 497-504 Ref: 13 ref.
2000
บทคัดย่อ
Cut flowers of the spray type carnation Light Pink Barbara graded as: high(H), middle(M) and the low(L) in a flower market were investigated with respect to their vase life, fresh weight, and water and sugar contents in the floral organs. 1. Total fresh weight, percent water content and water absorption were highest in H and lowest in L throughout the experiment. 2. Buds of H and M opened normally within 10 days, whereas those of L blasted; vase life in H and L were 15 and 10 days, respectively. 3. Petals of H and M contained 11 to 13 mg/100 mg dry weight (DW) of glucose and fructose, respectively, at the beginning of the experiment; the concentration in H decreased to about 8 mg/100 g DW within 4 days and sustained this level, whereas in M, they decreased to about 4 and 6 mg/100 g DW by the end of the experiment. Petals of L contained 4 and 6 mg/100 g of glucose and fructose, respectively, throughout the experiment. 4. Sucrose contents of leaves were 10 mg/100 mg in H, 12 mg/100 mg in M and abo
ut 2 mg/100 mg in L; fructose and glucose contents were about 1 mg/100 mg in the grades. These levels persisted throughout the experiment in leaves of all grades. 5. Sucrose contents in stem of the 3 grades ranged between 4 to 6 mg/100 mg DW throughout the experiment; glucose content decreased from 2 mg to 0.5 mg/100 mg during the same period. 6. When cut flowers were treated with silver thiosulfate, a substantial amount of silver was detected in petals, indicating that a significant uptake of the solution occurred. These results indicate the high water content of the cut flower with high fructose and glucose contents in the petals contribute to long vase life in spray carnation treated with silver.