บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Benzyladenine and gibberellins improve postharvest quality of cut asiatic and oriental lilies.

Han, S. S.

HortScience. Volume 36, Number 4, 2001. Pages 741-745.

2001

บทคัดย่อ

Benzyladenine and gibberellins improve postharvest quality of cut asiatic and oriental lilies.

The effects of the duration of cold storage, as well as the concentration, timing, and means of application of a solution containing 25 mg/litre each of benzyladenine (BA) and gibberellins (GA4+7) on the postharvest quality of cut Asiatic (cultivars Geneve and Vivaldi) and Oriental (cultivars Stargazer and Acapulco) lilies (Lilium sp.) were evaluated. Depending on the cultivar, lower leaves began to turn yellow between 1 and 2 weeks after placing non-cold-stored stems in a 20 deg C room illuminated 12 h.d-1 with 8 micro mol.m-2.s-1 from cool-white fluorescent lamps. Leaf yellowing continued to progress upward until the end of the vase life. Cold storage (3.3 deg C) worsened the leaf disorder, particularly, on Stargazer. The longer the duration of cold storage, the earlier the development of leaf yellowing and the higher the percentage of leaves that were chlorotic. In addition, cold storage induced bud blasting, inhibited flowers from fully opening, and reduced the longevity and fresh weight of open flowers and the vase life of cut stems. Spraying leaves with a solution containing 25 mg/litre each of BA and GA4+7 significantly reduced cold-storage-induced leaf yellowing, bud blasting and vase life of three of the four cultivars tested. The development of leaf yellowing declined with increasing concentration of BA+GA4+7. The susceptibility of Stargazer to cold-storage-induced leaf yellowing and bud blasting can be counteracted by a concentration of growth regulators higher than that which was effective for the other cultivars. Timing of the BA + GA4+7 application was not critical, as there were no differences in leaf yellowing or bud development when the solution was sprayed before or after the cold storage. Addition of BA + GA4+7 (0.5 or 2.5 mg/litre of each) to the preservative solution or a pulsed treatment in solutions containing 25 mg/litre each of BA and GA4+7 for 4 h prevented leaf yellowing, but increased bud blasting. For practical applications, growth regulators can be sprayed prior to or after cold storage to improve the postharvest leaf and flower quality of cut lilies.