Developmental Studies in the Christmas Rose ( Helleborus niger L . )
Developmental Studies in the Christmas Rose ( Helleborus niger L . )
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
B. Salopek-Sondi;V. Magnus
中科院分区：
文献类型：
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作者：
B. Salopek-Sondi;V. Magnus
圣诞玫瑰（Helleborus尼日尔L.）是一种草本，冬绿色，多年生植物，原产于南欧，也被广泛种植作为观赏植物。在温和的冬天，花确实可能出现在圣诞节的时候，类似于野玫瑰的大小和颜色（白色粉红色）。圣诞玫瑰生殖发育的特点是一个有趣的方面，在开花植物界并不常见：授粉和受精后，花被发育出光合机构，并在果实发育期间持续存在。未授粉或去雄蕊的花朵存活的时间几乎与它们的结果邻居一样长，但不经过完整的绿化过程。雌蕊群的去除也会影响花的形状和花梗的长度。通常触发和维持这些形态发生过程的相关信号似乎包括在发育果实中合成的植物激素。由于其花朵的大小，它们的寿命长，以及果实发育和成熟引起的变化，圣诞玫瑰可能成为一个有用的研究模型，用于解开发育中的种子和母体植物之间的一些复杂的相互作用。_____________________________________________________________________________________________________________
The Christmas rose (Helleborus niger L.) is a herbaceous, winter-green, perennial native to Southern Europe, which is also widely grown as an ornamental. In mild winters, the flowers may indeed appear at Christmas time, resembling wild roses with respect to size and color (white to pink). Reproductive development in the Christmas rose is characterized by an interesting aspect, uncommon in the world of flowering plants: after pollination and fertilization, the perianth develops a photosynthetic apparatus, and persists during fruit development. Unpollinated or depistillated flowers survive almost as long as their fruit-bearing neighbors, but do not pass through the complete greening process. Removal of the gynoecium also affects the shape of the flower and the length of the flower scape. The correlative signals which normally trigger and maintain these morphogenetic processes appear to include plant hormones synthesized in the developing fruit. Because of the size of its flowers, their long lifespan, and the changes induced by fruit development and maturation, the Christmas rose could become a useful research model for disentangling some of the complex interactions between developing seeds and the mother plant. _____________________________________________________________________________________________________________