The influence of irrigation and cultivar on SCN^- content in radish and Chinese cabbage was investigated. The results obtained were as follows.
1. Influence of irrigation on SCN^- content in ´Comet´ radish:
The SCN^- content of foliage and cotyledon in unirrigated treatment was greater than that of irrigation plots. However the SCN^- content of roots was not markedly different, compared with irrigated treatments. Amounts of SCN^- were greatest in leaves and tow-est in roots. SCN^- content in leaves was increased to the 4-leaf stage, then decreased with age. In cotyledons and roots, SCN^- content decreased with age, regardless of the treatments. SCN^- content in roots was positively correlated with top/root ratio(wt/wt, fresh wt basis) in each treatment.
2. Influence of cultivar on SCN^- content of radishes and Chinese cabbage:
In the roots of ´Comet´, `Autumn ´Wonder´, $quot;Winter Keeper´, ´Tiger´(radish) and `Disease Resistant Sixty´ (Chinese cabbage), the SCN^- content decreased with age. In the foliage of ´Comet´ radish and Chinese cabbage, the SCN^- content decreased like in roots. But in other radishes, amounts of SCN^- were increased to the 33 days from seeding, then decreased. SCN^- content in roots was negatively correlated with top/root ratio in Chinese cabbage.
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