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Ovule and seed production patterns in relation to flower size variations in actinomorphic and zygomorphic flower species

机译：放线和合形花种的胚珠和种子生产方式与花的大小变化

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摘要

Zygomorphic flower species tend to show lower flower size variation than actinomorphic flower species. Have these differences also brought an association in ovule and seed production that has arisen due to natural selection in these species? Flowers were collected from 29 actinomorphic and 20 zygomorphic flower species, and fruits were collected from 21 actinomorphic and 14 zygomorphic flower species in Miyagi and Aomori prefectures, in Japan. The coefficient of variations (CVs) of flower sizes, mean ovule sizes of flowers, ovule numbers of flowers and mean seed sizes of fruits were calculated. The CV of flower sizes was marginally different between the floral symmetry types; tending to be lower in the zygomorphic flower species than in the actinomorphic flower species. The CVs of mean ovule sizes and ovule numbers of flowers increased with increase in the CV of flower sizes in the actinomorphic flower species but not in the zygomorphic flower species. Mean ovule number of flowers tends to increase with increase in mean flower size in the actinomorphic flower species but not in the zygomorphic flower species. The degrees in variations in ovule size and number of flowers were influenced by the interaction of floral symmetry type and flower size variation, suggesting that floral symmetry also has brought an evolutionary association in ovule production by flowers.
机译：同形异形花种倾向于显示出比同形异形花种更低的花朵大小变化。这些差异是否也由于这些物种的自然选择而引起了胚珠和种子生产之间的联系？从日本的宫城县和青森县的29个放线形和20个合形花种中收集了花朵，并从21个放线形和14个合形花中收集了水果。计算出花朵大小的变异系数（CV），花朵的平均胚珠大小，花朵的胚珠数量和果实的平均种子大小。花的对称性在花的对称类型之间略有不同。趋向于在合子形花种中比在放线形花种中低。放线型花种的花的平均胚珠大小和胚珠数的CV随着花大小的CV的增加而增加，而在合子形花种中则没有。花的平均胚珠数倾向于随着放线型花种中平均花大小的增加而增加，而不是在同型花种中。胚珠大小和花数变化的程度受花对称型和花大小变化相互作用的影响，表明花对称性也带来了花胚珠生产的进化联系。

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