CULTIVAR, FLOWER STAGE, SILVER THIOSULFATE, AND BA INTERACTIONS AFFECT PERFORMANCE OF POTTED MINIATURE ROSES

Citation
Lc. Cushman et al., CULTIVAR, FLOWER STAGE, SILVER THIOSULFATE, AND BA INTERACTIONS AFFECT PERFORMANCE OF POTTED MINIATURE ROSES, HortScience, 29(7), 1994, pp. 805-808
Citations number
22
Categorie Soggetti
Horticulture
Journal title
ISSN journal
00185345
Volume
29
Issue
7
Year of publication
1994
Pages
805 - 808
Database
ISI
SICI code
0018-5345(1994)29:7<805:CFSSTA>2.0.ZU;2-Q
Abstract
Experiments were conducted to study the interaction of cultivar, flowe r stage, silver thiosulfate (STS), and BA on flower senescence and lea f abscission in greenhouse grown potted miniature roses. plants of Ros a L. 'Meijikatar' (Orange Sunblaze) and 'Meirutral' (Red Sunblaze) wer e sprayed with several concentrations of STS and BA in factorial combi nation. 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 three st ages 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 exper iments, plants were placed in darkness at 16C for 4 days to simulate s hipping, and then they were evaluated in a controlled environment at 2 1C. Poststorage floral longevity (PSFL) was longer far 'Meirutral' tha n for 'Meijikatar' plants, regardless of chemical treatment or flower stage. Flowers that were in the bud stage (stage 1) before simulated s hipping lasted longer than flowers showing color (stages 2 and 3), reg ardless of cultivar or chemical treatment. Combinations of STS and BA did not increase PSFL compared to STS alone. Plants treated with 2 or 3 mM STS exhibited longer PSFL than nontreated plants; however, 2 and 3 mM were about equally effective. STS at 4 mM was phytotoxic in a pre liminary experiment. Applying BA alone did not affect PSFL, but did im prove postharvest flower opening on 'Meijikatar' plants about the same as STS applied alone. The large flowering cultivars represented by 'M eijikatar' and 'Meirutral' appear to be nonresponsive to BA. A star-sh aped malformation was induced on 'Meijikatar' and 'Meirutral' plants b y simulated shipping and was not prevented by STS or BA. Chemical name used: N-(phenylmethyl)-1H-purin-6-amine (BA).