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在3种条件即不同萌发温度和光照、不同贮藏温度和时间、不同盐浓度下,研究了互花米草种子萌发及胚生长特性。结果表明:在相同温度下,种子的萌发不受光照或黑暗条件影响,最适萌发温度为16/26℃(夜/昼)和25℃,萌发率高于90%;在-5℃、0℃、5℃、10℃的贮藏温度下,贮藏120d的种子萌发率高于74%,表明种子能够安全越冬;当盐浓度为75～225mmol.L-1时,萌发率高于90%,150mmol.L-1的盐浓度较适宜胚的生长,胚芽鞘和胚轴的生长先于胚芽和胚根,盐溶液对胚轴、胚芽鞘的生长所产生的抑制作用小于胚根、胚芽,有利于已萌发的幼苗快速出土,适应多变的潮间带环境。
The seed germination and embryo growth characteristics of Spartina alterniflora were studied under three conditions, ie, germination temperature and light, storage temperature and time, and different salt concentrations. The results showed that under the same temperature, the seed germination was not affected by light or dark conditions. The optimal germination temperature was 16/26 ℃ (night / day) and 25 ℃, the germination rate was higher than 90%. At -5 ℃, 0 The germination rate of the seeds stored for 120 days was higher than 74% under the storage temperature of 10 ℃, 5 ℃ and 10 ℃, indicating that the seeds could safely wintering. When the salt concentration was 75 ~ 225mmol.L-1, the germination rate was higher than 90% L-1 salt concentration is more suitable for embryo growth, coleoptile and hypocotyl growth before germ and radicle, salt solution on the hypocotyl, coleoptile growth inhibition less than radicle, germ, is conducive to Germinated seedlings have been quickly excavated to adapt to changing tidal environment.