บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Oxidative stress and chilling injury of mungbean seedlings.

Lin W.C., Saltveit M.E.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.59

2004

บทคัดย่อ

Oxidative stress and chilling injury of mungbean seedlings. Mungbean (Vigna radiata (L.) Wilczek cv. AC Harosprout) seedlings were used to test the hypothesis that moderate stress offers protection against chilling injury.Two methods of moderate stress were imposed prior to chilling at 2.5 °C.Chilling injury was measured by decreased elongation of radicle length at 25 °C following 1 to 4 days of chilling at 2.5 °C.

First, a continuous flush of pure oxygen for 24 hours o­nto mungbean seedlings with radicle length of 10-12 mm showed a partial reversal of chilling injury, when seedlings were subsequently subjected to chilling at 2.5 °C for 1 or 2 days.When seedlings were chilled at 2.5 °C for 3 or 4 days, the promotive effect ofowxygen pre-treatment disappeared.

Secondly, a pre-treatment of soaking mungbean seedlings at 5 mm radicle length with 0.1% hydrogen peroxide for 45 minutes prior to chilling at 2.5 °C decreased the radicle length of chilled and non-chilled seedlings.In a follow up experiment, H2O2 soaking had no effect o­n radicle length of chilled and non-chilled seedlings when H2O2 soaking was applied at 5 mm radicle length and chilling was delayed until radicle length was about 10 mm.These preliminary results indicated a possible role of moderate stress in a partial tolerance to chilling under some conditions.