长白山区6种杜鹃花属植物种子形态及萌发特性
Journal of Yangzhou University(Agricultural and Life Science Edition)(2011)
Abstract
选择长白山区6种杜鹃花属植物种子进行形态及萌发特性观察.结果表明:6种杜鹃花属植物种子呈椭圆、矩圆、卵形等形态,种子极为细小,且种间差异极显著,以迎红杜鹃(Rhododendron mucronulatum)种子千粒重最重(0.1112 g),苞叶杜鹃(R.redowskianum)最轻(0.022 3 g);种皮吸水性良好;萌发时滞最短为毛毡杜鹃(R.conferitissmum)7 d,最长为苞叶杜鹃12 d;发芽率、发芽势、发芽指数以迎红杜鹃(83.33%、50.00%、35.68%)和兴安杜鹃(R.dauricum)(80.67%、47.33%、35.41%)最高,毛毡杜鹃次之,牛皮杜鹃(R.aureum)和小叶杜鹃(R.parvi folium)较低,苞叶杜鹃最低,仅为2.500%、1.167%和0.334%,4类间差异显著.
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Key words
germinating characteristics,Changbai Mountains,Rhododendron,seed morphology
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