ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of preharvest growing temperatures on the development of cut roses.

Gudin, S.;

Postharvest Biology and Technology Year: 1992 Vol: 2 Issue: 2 Pages: 155-161 Ref: 18 ref.

1992

บทคัดย่อ

Rosa hybrida plants (cultivars Meitakilor and Meired) grafted on R. indica [R. chinensis] (cv. Major) were grown in pots in greenhouses kept at a minimum of 13 deg C until 3 weeks before the first flower stems were harvested. The greenhouses were then set to 21 deg /13 deg or 22.5 deg /17 deg day/night temperatures. Flower stems were cut at 2 well defined morphological stages (the tight bud and cracked bud stages), and vase life was measured. For both stages and cultivars, flower stems originating from the warmer greenhouse could be harvested 6-9 days earlier than those originating from the cooler greenhouse. The latter ones had significantly longer buds (1.2 to 1.4 times) and more petals than the former. When flower stems from the warm greenhouse were cut at the tight bud stage, 100% and 87% of cv. Meitakilor flowers reached the half-open and fully open stages, respectively, compared with 63% and 60%, respectively, for cv. Meired. When flower stems were cut at the cracked bud stage this difference between cultivars almost disappeared. When flower stems from the cooler greenhouse were cut at the tight bud stage, 33.3% and 13% of cv. Meitakilor flowers and 3% and 0% of cv. Meired flowers reached the half-open and fully open stages, respectively. When these flower stems were cut at the cracked bud stage, 100% and 93% of cv. Meitakilor flowers and 97% and 87% of cv. Meired flowers reached the half-open and fully open stages, respectively. The flower stems cut at the cracked bud stage took longer to reach a fully open stage than the flower stems cut at the tight bud stage.