Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.
摘要同蕨类的体可经由同体自交、异体交两类统或以无生殖的方式产生,异体交又可分为异体自交和异体异交两种方式。
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As I carefully brush the backs of my fingers against moss beds, tiny stalk-like beings tickle me. Jutting out of moss leaves, these stalks are known as sporophytes; each sporophyte contains a capsule of spores at its outermost end.
当我小心翼翼地用手指背面扫过苔藓时,细小的茎状结构会挠得我发痒。这些茎从苔藓叶中探出来,被称为孢子,每个孢子的末端有一个孢子囊。
Having a dominant sporophyte introduced lots of advantages — like, while the spore-making generation of a bryophyte couldn't grow very far off the ground; the sporophytes of seedless vascular plants could grow much taller and larger, with more room for spore-producing organs.
拥有一个优势孢子带来很多好处——比如,苔藓植物的产孢不能长得离地面很远;而无籽维管植物的孢子可以长得更高更大,有更多的空间容纳产孢器官。