Molecular analysis of NOZZLE, a gene involved in pattern formation and early sporogenesis during sex organ development in Arabidopsis thaliana
Molecular analysis of NOZZLE, a gene involved in pattern formation and early sporogenesis during sex organ development in Arabidopsis thaliana
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DOI：
10.1073/pnas.96.20.11664
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发表时间：
1999-09-28
影响因子：
11.1
通讯作者：
Schneitz, K
中科院分区：
文献类型：
--
作者：
Schiefthaler, U;Balasubramanian, S;Schneitz, K
有性生殖是植物的一个显著方面，而复杂的结构，如被子植物的花，已经进化到有助于这一过程。在花内，相应的性器官，花药和胚珠，分别形成雄性和雌性孢子囊，花粉囊和珠心。然而，尽管它们在有性生殖中起着核心作用，但人们对控制这些重要结构建立的机制知之甚少。在这里，我们提出的鉴定和分子特征的NOZZLE（NZZ）基因在开花植物拟南芥。在几个nzz突变体中，珠心和花粉囊不能形成。这表明NZZ在两种类型孢子囊的发育中起着早期和核心作用，并且控制这些过程的机制共享一个关键因素。此外，NZZ可能在雌雄孢子发生过程中具有早期功能。这些研究结果的进化方面进行了讨论。NZZ编码一种功能未知的蛋白质。然而，基于序列分析，我们推测NZZ是一个核蛋白，可能是一个转录因子。
Sexual reproduction is a salient aspect of plants, and elaborate structures, such as the flowers of angiosperms, have evolved that aid in this process. Within the flower the corresponding sex organs, the anther and the ovule, form the male and female sporangia, the pollen sac and the nucellus, respectively. However, despite their central role for sexual reproduction little is known about the mechanisms that control the establishment of these important structures. Here we present the identification and molecular characterization of the NOZZLE (NZZ) gene in the flowering plant Arabidopsis thaliana. In several nzz mutants the nucellus and the pollen sac fail to form. It indicates that NZZ plays an early and central role in the development of both types of sporangia and that the mechanisms controlling these processes share a crucial factor. In addition, NZZ may have an early function during male and female sporogenesis as well. The evolutionary aspects of these findings are discussed. NZZ encodes a putative protein of unknown function. However, based on sequence analysis we speculate that NZZ is a nuclear protein and possibly a transcription factor.