芋种子萌发特性的研究

以仰光×乐平及仰光×霞山2种杂交种子为试材,探究消毒方法、光照、温度、播种基质对芋种子萌发和生长的影响。结果表明:8%Na Cl O(无水酒精稀释)处理9min后用无水酒精清洗种子是最佳的芋种子消毒方法;种子或珍珠岩消毒对种子的萌发和子叶的生长无显著影响,但在有菌条件下,生长后期衍生出的细菌或真菌会影响子叶的后续生长;芋种子是喜光性种子,种子萌发的适宜温度为25~30℃;在培养土中,芋种子不萌发,湿润滤纸、无菌水、珍珠岩、沙子和MS培养基中芋种子的发芽率较高,但仅沙子和MS培养基中幼苗生长健壮;移栽于培养土后幼苗生长良好,成活率高达95%。

Studies on Characteristics of Taro Seed Germination

Taking hybrid taro〔Colocasia esculenta（L.）Schoot〕seeds‘ Yangguang×Leping’ and ‘Yangguang×Xiashan’ as experimental material，this study explored the effects of disinfection method， light，temperature，sowing substrate on taro germination and growth．The results showed that washing taro seeds with anhydrous alcohol after treating them with 8% NaClO（anhydrous alcohol diluted）for 9 minutes was the best seed disinfection method．There was no significant effect on seed germination and cotyledon growth by seed or perlite disinfection，but bacteria or fungi derived at later growth stage might affect the subsequent growth of cotyledon．Light is essential for taro seed germination and the optimum temperature for seed germination is 25-30 ℃．Seed germination rates were relatively higher in moistened filter paper，sterile water，sand，perlite and MS substrate，while no seed could germinate in cultivation soil．However, seedlings grew strongly on sand and MS substrate，and grew well after being transplanted in cultivation soil．Their survival rate was high up to 95%．