Studies on the complementary relationship of surface ornamentations between megaspores and microspores of Selaginella P. Beauv. (Selaginellaceae)
Studies on the complementary relationship of surface ornamentations between megaspores and microspores of Selaginella P. Beauv. (Selaginellaceae)
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DOI：
10.1002/jemt.23148
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发表时间：
2018-10
影响因子：
2.5
通讯作者：
Lijuan Wang;Xian-chun Zhang;Jiaxi Liu
中科院分区：
文献类型：
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作者：
Lijuan Wang;Xian-chun Zhang;Jiaxi Liu
用扫描电子显微镜对卷柏属20种植物的大孢子和小孢子表面纹饰进行了研究。研究结果表明，大孢子表面纹饰与相应的小孢子表面纹饰具有互补性。大孢子的网状表面纹饰与小孢子的颗粒状和杆状纹饰互补；大孢子的疣状纹饰与小孢子的粗糙纹饰互补；大孢子的颗粒状纹饰与小孢子的疣状或疣状纹饰互补；大孢子的瘤状纹饰与小孢子的刺状、疣状或疣状纹饰互补；大孢子的瘤状纹饰与小孢子的片状、瘤状或疣状纹饰互补。大孢子和小孢子之间的互补纹饰允许小孢子附着在大孢子上。我们的观察结果支持“突触孢子”假说，即孢子表面的纹饰在孢子在蕨类植物中扩散的过程中起着保持或聚集孢子的作用。
In the present study, the surface ornamentations of both megaspores and microspores of 20 species of Selaginella were studied using scanning electron microscopy. The results of the present study showed that the megaspore surface ornamentations are complementary to the corresponding microspore surface ornamentations. In detail, reticulate surface ornamentation of megaspores is complementary to granulate and baculate ornamentations of microspores; verrucate ornamentation of megaspores is complementary to scabrate ornamentation of microspores; granulate ornamentation of megaspores is complementary to verrucate–rugulate or verrucate ornamentations of microspores; verrucate–rugulate ornamentation of megaspores is complementary to spinulate, verrucate, or verrucate–rugulate ornamentations of microspores; tuberculate ornamentation of megaspores is complementary to lamellate, tuberculate or verrucate ornamentations of microspores. Complementary ornamentation between megaspores and microspores allows microspores to adhere to megaspores. Our observations support the “synaptospory” hypothesis, that is, spore surface ornamentation plays a part in keeping or bringing spores together during their dispersal in the pteridophytes.