Issue Archive

Effects of the part of P-supply roots on cucumber seedling growth, P concentration in shoot and root and secreted acid phosphatase activity by root

Pang Xin, Zhang Fusuo, Li Chunjian

Plant Nutrition Department,China Agricultural University.Beijing 100094

Abstract

The results showed that the placement of 20% roots in P-free nutrient solution could increase shoot and root growth, the dry weights of shoot and root increased by 39% and 21% over those of the control, and it also could increase root up-take of phosphorus. Placing 20% of root in P-free nutrient solution did not decrease the P concentration in shoot, but gave a larger R/S ratio than that of +P treatment, which indicts that response of root to P-deficiency stress was earlier than that by shoot. From 2 d after split-root treatments, the activity of acid phosphatase secreted by root in P-free nutrient was higher than that by root in full nutrient solution, and the activity acid phosphatase secreted by root was significant correlated to P concentration in root, but not to P concentration in shoot.

Key words: P-deficiency stress;Acid phosphatase activity;Splitroot treatments;Cucumis sativus L.

Received: 　　Accepted:

Corresponding author: 　　E-mail:

Citing This Article：

Pang Xin, Zhang Fusuo, Li Chunjian. Effects of the part of P-supply roots on cucumber seedling growth, P concentration in shoot and root and secreted acid phosphatase activity by root. Acta Physiol Sin 2000; 52 (2): (in Chinese with English abstract).