บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The influence of 6-benzylaminopurine on post-harvest senescence of floral tissues of broccoli (Brassica oleracea var. italica).

Clarke, S. F.; Jameson, P. E.; Downs, C.;

Plant Growth Regulation Year: 1994 Vol: 14 Issue: 1 Pages: 21-27 Ref: 17 ref.

1994

บทคัดย่อ

The influence of 6-benzylaminopurine on post-harvest senescence of floral tissues of broccoli (Brassica oleracea var. italica).

ABSTRACT :

 

The pattern of postharvest senescence of broccoli cv. Shogun at 20 deg C and 98% RH in the dark, and the effects of applying the cytokinin BA were investigated. Chlorophyll degraded before ammonia production increased and this occurred earlier in florets at the edge of the head than those at the centre. Application of BA (2.21 x 10-4M) delayed the onset of both chlorophyll degradation and ammonia production. Pedicels contained low levels of chlorophyll which changed little over the duration of the experiment. Pedicels were unresponsive to BA treatment with no differences between chlorophyll degradation or ammonia accumulation between the treated and non-treated tissues. Application of BA to the carpel delayed chlorophyll degradation in the sepals, stimulated growth of the carpel and, when over-mature heads of broccoli were used, stimulated petal emergence. Treatment of florets with ACC and silver ions indicated that ethylene may be involved in the control of chlorophyll degradation. Cytokinin ap

plication negated the ACC-stimulated senescence.