苏铁Cycas revoluta两种特异形态特征

Preliminary Study on Abnormal Morphological Characters of Cycas revoluta

在开展苏铁Cycas revoluta形态特征观测中,发现一株苏铁根蘖苗有5片羽片生长异常,其中一片比其他正常羽片长且中脉出现分叉(即一羽多脉现象),另外4片基部两两贴生。另一株苏铁的小孢子叶球生长奇特,其顶部为莲座状,形似大孢子叶球。这两种异常现象为苏铁类植物的系统分类与演化研究提供了新资料。

Two kinds of morphological anomalies in Cycas revoluta were observed in Fuzhou, FujianProvince. The first was that a sucking bud seedling had grown 5 pieces of abnormal leaflets, onepiece with a bifurcated midrib was longer than normal leaflets, and another had a double-pieced base.And the second was that a male cone had a rosette tip, as if there were a female cone on its top. Thesekinds of anomaly would provide some new basic data for cycad systematics and evolution.