ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

The use of plant bioregulators in ornamental crops.

Halevy, A. H.

Acta Horticulturae Year: 1995 Issue: No. 394 Pages: 37-43 Ref: 26 ref.

1995

บทคัดย่อ

The use of plant bioregulators (PBRs) in ornamental crops is more prevalent than in edible crops. The most common types of regulator used are gibberellins (GAs, most often GA3), ethylene and their antagonists. GAs are used to enhance elongation of many cut flowers and to promote bud break, thus producing more flowering shoots. They are commonly used to promote flowering of long day (LD) and cold-requiring plants grown under marginal inductive conditions and of autonomous-flowering plants of the Araceae. GAs also enhance postharvest life of certain flowers and foliage plants. The main use of ethylene in ornamental production is to promote flower formation, especially in bromeliads and certain bulbous plants. Ethylene can also be used to promote lateral branching. The most commonly used bioregulators in ornamental crop production are probably growth retardants. They are commonly used in pot plant production to achieve more compact and attractive growth and they promote flowering in certain woody o

rnamentals. Endogenous and external ethylene is the main factor reducing post-production life and causing flower and foliage abscission of many ornamentals. Silver thiosulfate (STS) is the main ethylene antagonist used to protect plants from ethylene damage. Concern about the impact of STS on the environment has promoted a search for effective alternatives. Those presently available, however, are less effective than STS. An effective chemical may be a volatile ethylene binding-site inhibitor such as diazocyclopentadiene. Manipulation of cytosolic Ca2+ concentration may become a novel means for controlling flowering, flower senescence and geotropic bending of flowers.