|
KMID : 0903620000410020177
|
|
Journal of the Korean Society for Horticultural Science
2000 Volume.41 No. 2 p.177 ~ p.181
|
|
|
Effect of Root Zone Temperature on Growth of Shoot and Root , and Physiological Responses of Apple Trees (Malus domestica Borkh.)
|
|
|
|
|
Abstract
|
|
|
|
In order to investigate the influence of root zone temperature on the changes in physiological responses of leaf, shoot, and root of apple trees, a pot experiment was conducted on ´Fuji´/M.9 and ´Fuji´/M.26 apple trees from May 1 to July 31, 1998. Three one-year-old apple trees were planted in each 80 L container filled with sandy loam soil. Root zone temperatures were controlled at 20, 25, 30, and 35℃. Shoot length of ´Fuji´/M.9 was longer at 20 and 25℃ than at 30 and 35℃ at 30 days after treatment (DAT), but was not different at 90 DAT. For ´Fuji´/M.26, however, shoot length was longer at 30 and 35℃ than at 20 and 25℃. The number of shoots was not influenced by root zone temperature. Dry weight of leaf and shoot of ´Fuji´/M.9 and ´Fuji´/M.26 increased with increasing root zone temperature, while that of root of ´Fuji´/M.9 decreased. Leaf chlorophyll content of ´Fuji´/M.9 was lowest at 20℃ until 60 DAT, but was lowest at 35℃ at 88 DAT However, leaf chlorophyll content of ´Fuji´/M.26 was lowest at 35℃. The proline content increased with rising root zone temperature, but decreased with time. The carbohydrate content of leaf of ´Fuji´/M.9 was highest at 25℃, while that of root was highest at 30℃. In ´Fuji´/M.26, carbohydrate content of leaf was highest at 35℃, but that of root was decreased with rising root zone temperature. The root activity of ´Fuji´/M.9 increased with rising root zone temperature, but that of ´Fuji´/M.26 was highest at 25℃.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|