Ovule and seed production patterns in relation to flower size variations in actinomorphic and zygomorphic flower species. AoB Plants 11
Ovule and seed production patterns in relation to flower size variations in actinomorphic and zygomorphic flower species. AoB Plants 11
复制标题
胚珠和种子生产模式与辐射对称和左右对称花种的花大小变化有关。
作者：
Mochizuki;J.;Itagaki;T.;Aoyagi Blue;Y.;Ito;M.;and Sakai;S.
两侧对称的花比辐射对称的花的大小变化小。这些差异是否也带来了胚珠和种子生产的关联，这是由于这些物种的自然选择而产生的？在日本的宫城和青森两县采集了29种辐射对称和20种左右对称花的花和21种辐射对称和14种左右对称花的果实。计算了花大小、花的平均胚珠大小、花的胚珠数和果实的平均种子大小的变异系数。花大小的CV是略有不同的花对称类型之间，往往是较低的左右对称的花种比辐射对称的花种。花的平均胚珠大小和胚珠数的变异系数在辐射对称花种中随花大小变异系数的增加而增加，而在左右对称花种中不随花大小变异系数的增加而增加。花的平均胚珠数在辐射对称的花种中随平均花大小的增加而增加，而在左右对称的花种中则不随平均花大小的增加而增加。胚珠大小和花数的变异程度受花对称性类型和花大小变异的交互作用影响，表明花对称性也带来了花产生胚珠的进化关联。
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.