Cell-Cell Communication in Plant Reproduction
Cell-Cell Communication in Plant Reproduction
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DOI：
10.1042/bst0380571
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发表时间：
2010-04-01
影响因子：
3.9
通讯作者：
Dickinson, Hugh G.
中科院分区：
文献类型：
--
作者：
Feng, Xiaoqi;Dickinson, Hugh G.
被子植物花药演化的关键步骤包括小孢子囊同心排列和四个小孢子囊合并成叶状结构。在模式植物拟南芥中的突变体研究正导致越来越准确的图片（i）细胞谱系最终在小孢子囊中存在的不同细胞类型（小孢子母细胞，绒毡层，和中间和内皮层），和（ii）一些基因负责指定他们的命运然而，赋予发育中的花药极性和小孢子囊在其中的位置的过程仍然不清楚。当然，来自一系列实验策略的数据表明，激素在建立极性和花粉囊初始模式方面发挥着核心作用，并且可能负责定位小孢子囊。但是，小孢子囊最初位于外部的事实表明，它们的发育可能是自主的，可能是生殖细胞产生控制发育的花药表皮生长和分裂的信号。这些可能性进行了讨论的背景下，启动和维持男性和女性生殖发育的基因的表达，并在我们目前的观点花药进化的角度。
Key steps in the evolution of the angiosperm anther include the patterning of the concentrically organized microsporangium and the incorporation of four such microsporangia into a leaf-like structure. Mutant studies in the model plant Arabidopsis thaliana are leading to an increasingly accurate picture of (i) the cell lineages culminating in the different cell types present in the microsporangium (the microsporocytes, the tapetum, and the middle and endothecial layers), and (ii) some of the genes responsible for specifying their fates However, the processes that confer polarity on the developing anther and position the microsporangia within it remain unclear. Certainly, data from a range of experimental strategies suggest that hormones play a central role in establishing polarity and the patterning of the anther initial, and may be responsible for locating the microsporangia. But the fact that microsporangia were originally positioned externally suggests that their development is likely to be autonomous, perhaps with the reproductive cells generating signals controlling the growth and division of the investing anther epidermis. These possibilities are discussed in the context of the expression of genes which initiate and maintain male and female reproductive development, and in the perspective of our current views of anther evolution.