บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Comparing the physiological changes in apples and pears during shelf-life measures by fluorescence imaging.

Huybrechts C., Valcke R.

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

2004

บทคัดย่อ

Comparing the physiological changes in apples and pears during shelf-life measures by fluorescence imaging.  The physiological state of plants can be determined by red-light cholrophyll fluorescence induced after excitation with UV or blue light.Smillie et al. (1987) showed that two major changes affect the level of chlorophyll fluorescence emission during fruit ripening and senescence.Fluorescence decreases due to loss of photosynthetic competence per unit chlorophyll leading to reduced PSII activity or due to a decrease in chlorophyll content associated with fruit ripenin and senescence.

Research has shown that fruit quality (Nedbal et al., 2000), storage potential (Huybrechts et al., in press) and the incidence of physiological disorders (Ciscato et al., 2001; Huybrechts et al., 2002) during storage can be predicted by means of chlorophyll fluorescence imaging.In this experiment, a transportable chlorophyll fluorescence imaging system was used to study physiological changes in “Jonagold” apples and “Conference”; pears during shelf-life.Fruit was bought in a local store an measured during consecutive days at room temperature in order to detect physiological changes during this period.During shelf-life a decrease of the maximal fluorescence intensity and changes in the homogeneity of the images is observed although there appear to be little or no visual changes.This allows us to study the physiological changes associated with fruit ripening and senescence in apples and pears.