Male gametophyte development: a molecular perspective
Male gametophyte development: a molecular perspective
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DOI：
10.1093/jxb/ern355
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发表时间：
2009-04-01
影响因子：
6.9
通讯作者：
Twell, David
中科院分区：
文献类型：
--
作者：
Borg, Michael;Brownfield, Lynette;Twell, David
花粉粒代表开花植物中高度减少的单倍体雄配子体生成，从花药释放时仅由两个或三个细胞组成。它们的作用是将双胞胎精子细胞输送到胚囊，与卵子和中央细胞融合。这种双重受精事件以及雄性配子体的功能特化被认为是开花植物进化成功的关键创新。这篇综述涵盖了我们对控制雄性配子体发育的分子机制的理解的最新重要进展。简要概述了花粉发育，然后讨论了单倍体基因表达的全基因组转录组学研究。讨论了通过对雄性配子发生的标志性事件进行遗传分析所取得的进展，重点是精子细胞的产生，并提出了控制雄性生殖系发育的调控网络的新兴模型。该综述最后展望了这些数据对未来研究策略的影响，以进一步加深我们对花粉发育的配子体控制的理解。
Pollen grains represent the highly reduced haploid male gametophyte generation in flowering plants, consisting of just two or three cells when released from the anthers. Their role is to deliver twin sperm cells to the embryo sac to undergo fusion with the egg and central cell. This double fertilization event along with the functional specialization of the male gametophyte, are considered to be key innovations in the evolutionary success of flowering plants. This review encompasses important recent advances in our understanding of the molecular mechanisms controlling male gametophyte development. A brief overview of pollen development is presented, followed by a discussion of genome-wide transcriptomic studies of haploid gene expression. The progress achieved through genetic analysis of landmark events of male gametogenesis is discussed, with a focus on sperm cell production, and an emerging model of the regulatory network governing male germline development is presented. The review concludes with a perspective of the impact these data will have on future research strategies to further develop our understanding of the gametophytic control of pollen development.