Relation between Resistance to Bacterial Wilt and Calcium Nutrition in Tomato Seedlings

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
35-03-03.pdf202.78 KB

To contribute to the development of new integrated practices for the control of soilborne diseases, the relation between the development of bacterial wilt, a serious soilborne disease induced by Ralstonia solanacearum, and Ca nutrition in tomato (Lycopersicon esculentum Mill.) seedlings was investigated. Increased Ca concentrations in the nutrient solution reduced the disease severity in the seedlings of resistant cultivars, and decreased the populations of the pathogen in stems. This Ca-dependent resistance was also observed in susceptible tomato seedlings grafted onto rootstocks of a highly resistant cultivar. The resistance was affected by the Ca concentration after infection with the pathogen, but not before infection, suggesting that the Ca concentration in the cell walls before infection might not be directly involved in the Ca-dependent resistance. When varietal differences in the resistance and nutrient uptake by the seedlings were examined, highly resistant cultivars were characterized by a high Ca uptake. However, the differences in Ca uptake might not be related to the expression of the resistance, based on the results of experiments using mutually grafted seedlings of cultivars differing in resistance. Application of composts with various Ca concentrations reduced the disease severity, and the degree of reduction was correlated with the increase of the Ca uptake in shoots. These results indicate that the resistance of tomato to bacterial wilt is markedly affected by Ca nutrition of the host.

作成者 Hiromichi YAMAZAKI




Lycopersicon esculentum

Ralstonia solanacearum

公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 163
終了ページ 169
DOI 10.6090/jarq.35.163
権利 Japan International Research Center for Agricultural Sciences
言語 eng