稻属20个种外稃乳突的扫描电镜观察

Study on the Tubercles of Lemma in 20 Species of Oryza with Scanning-electric Microscope

用扫描电镜对稻属植物20个种的外稃表面乳突性状作了观察。根据乳突的形态特征,将乳突分为s类,即双峰乳突,多峰乳突,瘤峰乳突,单峰乳突和凹痕乳突。根据峰角度和垭角度性状,将双峰乳突进一步分为锐型和钝型两种类型。并研讨了乳突特征与稻种分类的关系问题。

The tubercle on lemma surface of grain in 20 species of Oryzae with electric-scanning microscope were studied. The 5 kinds of tubercles have been classified based on the characters of tubercles, which are e. g. 'bi-peak' tubercle kind, 'multi-peak' tubercle kind, 'warty-peak' tubercle kind, 'simple-peak' tubercle kind and trace tubercle kind. The 'acute' type and 'obtuse' type of the bi-peak tubercle kind were classified also based on the peak angle and col angle. The correlation of classification and evolution among Oryza species with the character of tubercle were discussed.