บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Respiration rate of postharvest sugarbeet root is unrelated to respiratory capacity or adenylates

Klotz K.L., Finger F.L.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.92

2004

บทคัดย่อ

Respiration rate of postharvest sugarbeet root is unrelated to respiratory capacity or adenylates Respiration is the primary cause of sucrose loss during postharvest storage of sugarbeet (Beta vulgaris L.).The factors that regulate respiration in sugar beet root, however, are largely unknown, although substrate availability, respiratory capacity and adenylate levels have been shown to control respiratory capacity and adenylates was investigated in harvested sugarbeet roots stored at 1 and 10°C with or without wounding.

Respiration increased in wounded roots stored at 10 °C and in wounded and unwounded roots after prolonged storage at 1 °C.

Differences in total respiratory capacity, cytochrome oxidase capacity, alternative oxidase capacity, ATP concentration, ADP concentration, ATP: ADP ratio, and phosphorylation potential were also observed between treatments, although changes in these parameters were unrelated to root respiration rate.Additionally, uncoupling respiration from oxidative phosphorylation by treating tissue sections with carbonyl cyanide-m-chlorophenyl hydrazone (CCCP) resulted in no increase in respiration rate.

These result indicate that postharvest sugarbeet root respiration is not significantly regulated by respiratory capacity or adenylate levels.