บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Carbohydrate status and postharvest leaf chlorosis of miniature roses as influenced by carbon dioxide enrichment.

Rajapakse, N. C.; Clark, D. G.; Kelly, J. W.; Miller, W. B.;

Postharvest Biology and Technology Year: 1994 Vol: 4 Issue: 3 Pages: 271-279 Ref: 18 ref.

1994

บทคัดย่อ

Carbohydrate status and postharvest leaf chlorosis of miniature roses as influenced by carbon dioxide enrichment.

ABSTRACT

The effect of CO2 enrichment on carbohydrate status and postharvest leaf chlorosis of potted miniature roses (cv. Meijikatar) was investigated. Plants were grown in 350, 700 or 1050 micro l CO2/litre until they reached flower bud coloration and placed in dark storage at 4 deg or 16 deg C for 5 days to simulate shipping before placing in an interior environment with a photon flux of 30 micro mol m-2 s-1 from a cool white fluorescent light source for postharvest evaluation. Stomatal resistance was increased (approx equal to 25%) and aperture was decreased (approx equal to 36%) by 700 or 1050 compared with 350 micro l CO2/litre. The higher CO2 levels slightly (10%) increased leaf sucrose concentration, had no effect on stem sucrose concentration and had little effect on whole plant reducing sugars. Leaf and stem starch concentration increased over 3-fold as CO2 increased from 350 to 700 micro l/litre. Regardless of storage temperature, CO2 enrichment did not affect the overall visual quality or per

centage leaf chlorosis after 5 days in the interior environment. Regardless of CO2 level, plants stored at 16 deg showed a 3-fold increase in leaf chlorosis compared with plants stored at 4 deg . Although CO2 enrichment increased the carbohydrate pools of the plants, the results do not support the hypothesis that increased carbohydrate supply plays a role in the reduction of postharvest leaf chlorosis of potted miniature roses.