|
KMID : 0903619980390020161
|
|
Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 2 p.161 ~ p.165
|
|
|
Nitrate Content and Activities of Nitrate Reductase and Glutamine Synthetase by Ionic Strength , Nitrate Concentration , Ratio of Nitrate to Ammonium in Nutrient Solution for Culture of Leaf Lettuce and Water Dropwort
|
|
이응호/Lee, Eung Ho
이재욱/이병일/권영삼/이용범/Lee, Jae Wook/Lee, Byoung Yil/Kwon, Young Sam/Lee, Yong Beum
|
|
|
Abstract
|
|
|
|
The fresh weight of leaf lettuce (Lactuca saliva L.) and water dropwort (Oenanthe stolonifera DC.) was higher at 1.5S and 2.0S than in anyother ionic srength in spring culture. The fresh weights were lowest at 0.5S in both crops. Nitrate contents, nitrate reductase and glutamine synthetase activities were highest at 2.0S in leaf lettuce with 4,330 ㎎·㎏^(-1) FW, 10.1 μM NO₂^-·g^(-1) FW·h^(-1) and 11.2 μM glu.·g^(-1) FW·h^(-1), respectively. Also water dropwort showed the same trend as leaf lettuce. In both leaf lettuce and water dropwort, fresh weights, nitrate contents, nitrate reductase and glutamine synthetase activities according to the nitrate concentrations in nutrient solution were higher at 13 meq·L^(-1) than at another nitrate concentrations. Under the ratio of NO₃^- : NH₄^+ = 75 : 25, fresh weights of leaf lettuce and water dropwort were 59.8 and 46.9 g, respectively, which were the highest among the treatments except for 100 : 0 ratio. At 100 : 0 ratio, NO₃ contents were highest with 3,845 ㎎·㎏^(-1) FW in leaf lettuce and 5,234 ㎎·㎏^(-1) FW in water dropwort. Activities of nitrate reductase and glutamine synthetase were also highest at 100: 0 ratio.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|