关键词: 四季萝卜, 硼, 叶片pH, 矿质元素

Abstract: To investigate the effect of boron（B）deficiency on the uptake of some nutrient elements. In this paper，cherry radishes（Raphanus sativus L. var. radiculus Pers）was grown in water containing 0 or 46.3 μmol ? L-1 boric acid to study the contents of boron and other main mineral elements in the fleshy root，young and old leaves，using HPLC method. The leaves were cut and stained by toluidine blue-O（TBO）and the anatomic structures were observed under light microscopes. We found that total boron，soluble boron，and cell wall binding boron decreased dramatically in all parts of the cherry radish grown in boron-lack condition，while the contents of Fe，Mn，Zn，Cu increased significantly. Boron deficiency also decreased the pH values and basophilic granules in leaves. These suggest that irregular cell walls as a result of B deficiency severely affect the structure and components of leaves，and the decreased pH of leaves can induce the absorption of other mineral elements.

Key words: cherry radish, boron；pH of leaf, mineral element