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首页> 外文期刊>Journal of Plant Research >Floral meristem size and organ number correlation in Eucryphia (Cunoniaceae)
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Floral meristem size and organ number correlation in Eucryphia (Cunoniaceae)

机译：<重点类型=“斜体”> eucryphia （Cunoniaceae）中的花卉分发尺寸和器官数相关性

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摘要

We present a comparative flower ontogenetic study in five species of the genus Eucryphia with the aim of testing whether differences in the organ number observed can be explained by changes in the meristematic size of floral meristem and floral organs. Species native to Oceania, viz. E. milliganii, E. lucida and E. moorei , have the smallest gynoecia with ca. 6 carpels, while the Chilean E. glutinosa and E. cordifolia present more than ten carpels. E. milliganii has the smallest flower with the lowest stamen number (ca. 50), while the other species produce around 200 stamens and more. Standardized measurements of meristematic sectors were taken in 49 developing flowers that were classified into three well-defined ontogenetic stages. Sizes of meristems varied significantly among species within each developmental stage as revealed by ANOVA analyses. Significant regressions between organ number and corresponding meristem size were consistent with the premise that a larger meristem size prior to organ initiation could be determining for a higher organ number. Flower organogenesis in Eucryphia also involves relevant meristem expansion while the organs are initiated, which results in a particular androecium patterning with a chaotic stamen arrangement. Meristem expansion also appears to be slower but more extensive in species with larger initial meristematic size, suggesting that flower phenotype can be determined in ontogeny by this heterochronic interplay of space and time.
机译：我们在五种种类的eucryphia中提出了一种比较花髓内研究，目的是测试观察到的器官编号是否可以通过花卉公司和花器器官的共同规模的变化来解释。物种原产于大洋洲，viz。 E. Milliganii，E. lucida和E. Moorei，拥有最小的Gynoecia与CA。 6个心皮，而智利E.Glutinosa和E. Cordifolia呈现出十多个心皮。 E. Milliganii拥有最小的花，雄蕊数最低（CA. 50），而其他物种产生大约200个雄蕊等。在49个开发的花朵中占用的标准化测量，分为三个明确定义明确定义的梭形阶段。 Anova分析揭示的每个发育阶段内的物种中的尺寸显着变化。器官码和相应的分发尺寸之间的显着回归与器官启动前更大的商品尺寸可以确定更高的器官编号的前提是一致的。在eucryphia中的花心组织还涉及相关的分发膨胀，同时启动器官，这导致特定的AndroeCium图案，具有混沌稳定装置。公司展开似乎似乎较慢但在具有较大初始注释大小的物种中更慢，表明花表型可以通过这种异形的空间和时间的相互作用来确定在组织化中。

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