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- Author or Editor: H.J. Price x
The identification of dormant buds of blackcurrant (Ribes nigrum L. cv. Wellington XXX) as floral or vegetative was attempted by forcing single buds to grow. The influence on forcing of time of year, hormone treatment, and position of buds on the shoots were investigated. Buds grew out more in February than November; gibberellic acid (GA) promoted bud growth in November, while 6-benzylamino purine (BA) at 50 ppm inhibited bud development. Buds that originated from the proximal part of the shoot grew out more than the distal ones.
Seed of germinated celery, Apium graveolens L. (Dulce group) and pepper, Capsicum annuum L. were separated from ungerminated seed by density differences in a sucrose and water solution. The top (floating) fraction in both species had the highest percentage germination and percent and rate of emergence compared to either the bottom fraction or unseparated seed.
Pepper transplants (Capsicum annuum L.) held under simulated transit conditions synthesized substantial amounts of ethylene, the rate of which was temperature dependent. Transplants treated with known concentrations of ethylene (0, 0.1 to 10.0 μ1/liter) were substantially defoliated at levels lower than those that may be produced in transit by the plants themselves. Exposure to ethylene concentrations of 0.5 jul/liter and greater impeded the growth of transplants after planting into the field. Removal of ethylene in storage with potassium permanganate greatly reduced abscission. Elevated storage CO2 levels stimulated ethylene synthesis by as much as 34%.