บทคัดย่องานวิจัย

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Cultivar, flower stage, silver thiosulfate and BA interactions affect performance of potted miniature roses.

Cushman, L. C.; Pemberton, H. B.; Kelly, J. W.;

HortScience Year: 1994 Vol: 29 Issue: 7 Pages: 805-808 Ref: 22 ref.

1994

บทคัดย่อ

Cultivar, flower stage, silver thiosulfate and BA interactions affect performance of potted miniature roses.

ABSTRACT :

 

Potted plants of the miniature rose cultivars Meijikatar (Orange Sunblaze) and Meirutral (Red Sunblaze) were sprayed with several concentrations of STS and BA in factorial combination. In winter, plants were sprayed with STS at 0 or 2 mM and BA at 0, 0.02, 0.04, 0.11, 0.22 or 0.44 mM. In spring, flowers at 3 stages of development were sprayed with STS at 0, 2 or 3 mM, and BA at 0, 0.02, 0.04, 0.22 or 0.44 mM. One day after treatment in both experiments, plants were placed in darkness at 16 deg C for 4 days to simulate shipping, and then they were evaluated in a controlled environment at 21 deg . Poststorage floral longevity (PSFL) was longer for Meirutral than for Meijikatar plants, regardless of chemical treatment or flower stage. Flowers that were in the bud stage (stage 1) before simulated shipping lasted longer than flowers showing colour (stages 2 and 3), regardless of cultivar or chemical treatment. Combinations of STS and BA did not increase PSFL compared with STS alone. Plants treated wi

th 2 or 3 mM STS exhibited longer PSFL than nontreated plants; these concentrations were about equally effective. STS at 4 mM was phytotoxic in a preliminary experiment. Applying BA alone did not affect PSFL, but did improve postharvest flower opening on Meijikatar plants to about the same extent as STS applied alone. The large flowering cultivars represented by Meijikatar and Meirutral appear to be unresponsive to BA. A star-shaped malformation was induced in flowers of both cultivars by simulated shipping and was not prevented by STS or BA.