Quality improvement of 'Seoul' celery by selenium in nutrient solution culture.

摘要

Accumulated Se contents in celery cv. Seoul increased with increasing rates of Se added to the nutrient solution in both sodium selenate and sodium selenite treatments. However, when Na2SeO4 and Na2SeO3 treatments were compared, more Se was found tohave accumulated in leaves and petioles in the Na2SeO4 treatment. Leaves accumulated higher amounts of Se than petioles at the same concentrations of Na2SeO4 and Na2SeO3. Even though growth was not severely affected by Se concentrations of up to 6 mg/litre, Se contents were very high (57.3 mg Se/kg dry matter). Selenite uptake by plants exhibited similar patterns, although overall accumulated contents were lower than for selenate. In the case of selenate treatments, total vitamin C contents gradually increased with the increase of selenate concentration in both leaves and petioles. Nitrate and protein contents of edible parts (petioles) decreased with the increase of selenate and selenite concentrations. Chlorophyll contents in leaves increased in 2-and 4-mg/litre treatments. These results suggest that selenate treatments of up to 4 mg/litre did not adversely affect celery growth.