Characterisation of sunflower-21 (SF21) genes expressed in pollen and pistil of Senecio squalidus (Asteraceae) and their relationship with other members of the SF21 gene family.

Sexual Plant Reproduction Pub Date : 2010-09-01 Epub Date: 2010-02-25 DOI:10.1007/s00497-010-0137-9

Alexandra M Allen, Christian Lexer, Simon J Hiscock

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引用次数: 10

Abstract

Two related flower-expressed gene copies belonging to the SF21 (sunflower-21) gene family have been isolated from Senecio squalidus (Oxford Ragwort, Asteraceae). These gene copies are differentially expressed in pollen and pistil tissues; ORSF21B (Oxford Ragwort SF21B) is expressed exclusively in mature pollen, whereas ORSF21A (Oxford Ragwort SF21A) is expressed in the transmitting tissue of the style, where it is developmentally regulated. Despite differences in expression, the coding regions of ORSF21A and ORSF21B are highly similar. Amino acid sequence alignments of SF21 genes from a number of angiosperm species indicate that this gene family is conserved in flowering plants and may play an important role in reproductive processes in a wide range of taxa. Phylogenetic analysis of SF21 nucleotide sequence alignments supports this theory, and indicates a complicated history of evolution of this gene family in angiosperms. The putative roles of SF21 genes in reproduction and pollen-pistil interactions are discussed.

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向日葵花粉和雌蕊中表达的SF21基因的特征及其与SF21基因家族其他成员的关系

从樱草中分离到两个同源的SF21(向日葵-21)基因家族。这些基因拷贝在花粉和雌蕊组织中有差异表达;ORSF21B(牛津Ragwort SF21B)只在成熟花粉中表达，而ORSF21A(牛津Ragwort SF21A)在花柱的传递组织中表达，在那里受发育调节。尽管ORSF21A和ORSF21B在表达上存在差异，但它们的编码区高度相似。对许多被子植物SF21基因的氨基酸序列比对表明，该基因家族在开花植物中是保守的，可能在许多分类群的生殖过程中发挥重要作用。SF21核苷酸序列的系统发育分析支持这一理论，并表明该基因家族在被子植物中具有复杂的进化历史。讨论了SF21基因在生殖和花粉-雌蕊相互作用中的可能作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sexual Plant Reproduction 生物-生殖生物学

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审稿时长

3 months