Post-floral perianth functionality:: Contribution of persistent sepals to seed development in Helleborus foetidus (Ranunculaceae)
Post-floral perianth functionality:: Contribution of persistent sepals to seed development in Helleborus foetidus (Ranunculaceae)
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DOI：
10.3732/ajb.92.9.1486
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发表时间：
2005-09-01
影响因子：
3
通讯作者：
Herrera, CM
中科院分区：
文献类型：
--
作者：
Herrera, CM
许多植物的花被在开花后仍然存在，但其花后功能却很少被研究，并且现有的少数研究提供了模糊的证据。本文测试的假设，即绿色宿存萼片（如果多年生草本植物，铁筷子，有助于提高种子数量和/或大小的植物的健身。花后花萼对果实和种子发育的贡献通过操纵萼片数量和测量对卵泡大小、种子集、每个卵泡的种子的影响来评估。和平均种子质量。对于花蕾、开放的花，检查了花萼大小和毛囊质量之间的异速生长关系。和未成熟的果实在卵泡数量上不同。花萼操作对卵泡大小，种子集或每个卵泡的种子数量没有显着影响，但它确实对单个种子的大小有显着影响。花萼大小和平均种子质量呈正相关，线性相关。萼质量/种子数比随果实中卵泡数的增加而下降。铁筷子的宿存萼片确实为种子的发育提供了资源，但没有证据表明花后萼质量/卵泡数比的异速生长调节可以补偿果实中种子数的变化。
The perianth persists after flowering in many plants, yet its post-floral functionality has been little investigated, and the few studies available provide ambiguous evidence. This paper tests the hypothesis that the green persistent sepals (if the perennial herb, Helleborus foetidus, contribute to the plant's fitness by enhancing seed number and/or size. Post-floral contribution of the calyx to fruit and seed development was evaluated by manipulating sepal number and measuring the effect on follicle size, seed set, seeds per follicle. and mean seed mass. The allometric relationship between calyx size and follicle mass was examined for flower buds, open flowers. and immature fruits differing in follicle number. Calyx manipulation had no significant effect on follicle size, seed set, or number of-seeds per follicle, but it did have a significant influence on the size of individual seeds. Calyx size and mean seed mass were positively, linearly related. The calyx mass/seed number ratio declined with increasing number of follicles per fruit, The persistent sepals of Helleborus do contribute resources to the development of seeds, although there is not evidence of post-floral allometric adjustment of the calyx mass/follicle number ratio that could compensate for variations in seed number per fruit.