孢子生殖
- 网络sporogony;spore reproduction;spore formation;exospore
孢子生殖-
胚囊发育分为两种类型，即有性生殖的蓼型和无孢子生殖的大黍型。
Its sexual reproduction exhibited the characteristics of polygonum_type embryo sac formation .
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起源于珠心的体细胞无孢子生殖胚囊的发育属于山柳菊型。
The development of embryo sac of apospory is of Hieracium type .
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无融合生殖是一种能代替有性生殖而不发生核融合，但能产生种子的生殖方式.它包括：（1）二倍体孢子生殖；
Apomixis differs from sexual reproduction in its production of seed without nuclear fusion .
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成熟无孢子生殖胚囊一般3核，包括1个卵细胞和2个极核。
Normally , 1-3 nucellar cells developed into mature aposporous embryo sacs characterized by 1 egg cell and 2 polar nuclei .
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另一方面，子囊孢子是在有性生殖之后产生的。
The ascospores , on the other hand , are produced by following sexual reproduction .