落叶松属孢子叶球上的几种畸形现象

作者对包头、北京中科院植物园等处栽培的落叶松属(Larix Mill.)植物所产生的畸形孢子叶球做了调查和解剖观察,发现落叶松属畸形孢子叶球发生几率较高,主要类型有两性孢子叶球;孢子叶球的基部营养叶远轴面产生小孢子囊(花粉囊),偶尔也可产生大孢子囊(胚珠);珠鳞近轴面偶尔也可产生小孢子囊;一些大孢子叶球或两性孢子叶球的顶端又生出营养枝条.作者认为,从这些畸形现象可直接反应出小孢子叶、苞鳞和营养叶是同源器官;大、小孢子囊也是同源器官,且在发育早期没有根本的区别.

The Several Abnormality on Strobile of Larix

Since 1990,in Bao- tou and arborera of Academy of Sciences of China in Peking,authors researched and dissected the abnormal strobiles of several of Larix planting. The results: the happening opportunity of abnormal strobiles are higher,There are several abnormal states essentially: 1.The bisexual strobile;2.Every once in a while,the microspo-rangium can are produced On the outside of the some nutritional leaves on the base of female - strobile, in there, macrosporangium(or ovule)can be produced as well occasionally;3. On the inner of ovuliferous scale, microsporangiumcan beproduced too; 4. On the top of several macro - strobiles or bisexural strobiles, the nutrtional wattle can be produced . The porint of view can be responded, microsporophill, the bract of macroprophyll and nutritional leaf are uniform opparatus on original. The oringe of macrosporangium and microsporanium are uniform as well as, and in the developed nonage,went without essential defference.