SYNCARPY AND ALTERNATIVE MODES OF ESCAPING DISADVANTAGES OF APOCARPY IN PRIMITIVE ANGIOSPERMS
SYNCARPY AND ALTERNATIVE MODES OF ESCAPING DISADVANTAGES OF APOCARPY IN PRIMITIVE ANGIOSPERMS
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DOI：
10.2307/1220588
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发表时间：
1982-01-01
期刊：
影响因子：
3.4
通讯作者：
ENDRESS, PK
中科院分区：
文献类型：
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作者：
ENDRESS, PK
在被子植物的大多数类群中，离体结实的原始条件已经被合心结实所超越，合心结实在几个方面是一种更复杂的结构。结果期花粉管分布更加规则，选择性更强，建设经济性更高，散布类型多样性更大。在原始被子植物中，有交替的进化趋势，表现出改良的无果性或不发达的合心果性，并有一些不寻常的分化（雌蕊群外的compulsory，hyperstigma）。这些替代方法共享一些，但不是全部，通常精心制作的合心皮的优点。显然，它们和正常的离体结实一样，与完美的合心结实相比竞争力不足。
In most groups of the angiosperms, the primitive condition of apocarpy has been surpassed by syncarpy, which is a more advantagenous construction in several respects. It enables more regular pollen tube distribution, intensified pollen tube selection, higher economy of construction and increased diversity of dispersal types in the fruiting stage. In primitive angiosperms there are alternative evolutionary trends exhibiting modified apocarpy or unelaborated syncarpy with some unusual differentiations (extragynoecial compitum, hyperstigma). These alternative methods share some, but not all, advantages of usual elaborated syncarpy. Apparently, they were, like normal apocarpy, not competitive enough compared with perfect syncarpy.