毛茛科毛茛科三个成员的花器官发生。

PubMed ID
发表日期 2019年Nov月

原始出处 工厂(瑞士巴塞尔)
Plants (Basel, Switzerland)
作者 Chang  Hongli  Downie  Stephen R  Peng  Hongli  Sun  Fengjie 

文献标题 毛茛科毛茛科三个成员的花器官发生。
Floral Organogenesis in Three Members of the Tribe Delphinieae (Ranunculaceae).

文献摘要

采用扫描电镜和组织学方法,对毛茛科德尔菲族3种植物(乌头属、翠雀属和金缕梅属)进行了研究。结果表明,飞燕草科植物与其多对称近缘植物有四个特征:(1)花被和雄蕊的螺旋状叶序和一系列心皮,表面上呈轮状排列;(2)萼片2是5个萼片中最大的,呈盔状或有一个距;(3)花瓣2和5在萼片2正面萌生,也变得具距;(4)第一朵花的单对称性在萼片2变大时形成。物种间的主要差异包括:第二个系列的发育时间;北美海棠的两个花瓣融合成一个花瓣;在早期发育阶段,两个年轻的有刺的花瓣产生了一个茎和两个突起,金龟子的一个突起,或者五味子的一个拱形叶片。花被的不均匀生长,以及心皮的减少和重新排列,是诱导花的对称转变的关键。


Three species (Aconitum taipeicum, Delphinium giraldii, and Consolida ajacis) of the tribe Delphinieae (Ranunculaceae) were examined using scanning electron microscopy and histological methods. The results showed that members of Delphinieae differ from their polysymmetrical relatives by four unique features: (1) a spiral phyllotaxis of their perianth and stamens, and a series of carpels, which initiated superficially in a whorl-liked arrangement; (2) sepal 2 being the largest one among the five sepals and becoming helmet-shaped or having a spur; (3) petals 2 and 5 initiated adaxially of sepal 2 and also becoming spurred; and (4) the monosymmetry of the first flower becoming established when sepal 2 becomes the largest. Major differences among the species include the timing of development of the second series; the fusion of two petals into a single one in C. ajacis; and, during early developmental stages, the two young spurred petals giving rise to a stalk and two bulges in A. taipeicum, a single bulge in D. giraldii, or an arch blade in C. ajacis. The unequal growth of the perianth, together with the reduction and the rearrangement of the carpels, are critical in inducing the symmetrical transformation of the flowers.


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