组织培养条件下不同番茄品种幼苗期的耐盐性比较

The comparison of salt tolerance between tomato cultivars' tissue-cultured plantlets

对12个番茄普通栽培品种和3个从日本引进的设施栽培专用耐盐砧木品种的幼苗分别进行系列浓度和高浓度(120 mmol.L-1)NaCl胁迫处理,10 d后调查不同品种单株幼苗的生长特性和盐害程度。结果表明,12个普通栽培品种在幼苗期存在明显的耐盐性差异,5个为盐敏感品种,4个为中等耐盐品种,3个为较耐盐品种;3个砧木品种的耐盐性显著强于12个普通栽培品种,且砧木“Support”耐盐性最强。以上结果为通过嫁接换根提高设施栽培番茄的耐盐性提供了理论基础。

The tissue-cultured plantlets of 12 common cultivars and 3 salt tolerant rootstock cultivars introduced from Japan were treated under different concentration NaCI stress, and 10 days later, the growth characteristics and salt injury of the plantlets were surveyed. The results showed that salt tolerances of 12 common cultivars at seedling stage were significantly different, and among them 5 cultivars were salt sensitive, 4 cultivars fairly salt tolerant, and the rest comparatively salt tolerance. The salt tolerances of 3 rootstock cultivars were significantly higher than those of 12 common cultivars and the rootstock cultivar ＂support＂ showed the highest salt tolerance. The above results laid down a theoretical basis for improving the salt tolerance of tomatoes under protected culture through grafting.