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CHANGES IN FLORET DEVELOPMENT PATTERNS THAT MAY CORRELATE WITH SEX DETERMINATION IN THE PCK CLADE (POACEAE)

机译:可能与PCK进化枝(POACEAE)中的性测定相关的花粉发育模式的变化

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摘要

We investigated changes in floral developmental patterns and sex determination in the PCK (phosphoenol-pyruvate carboxykinase) clade using a comparative approach and SEM. We identified variation in patterns of floral development that may be correlated with sex determination. Nine different patterns of floret development were identified, based on sex of the lower floret, sequence of stamen development, and rate of glume and lemma differentiation. Although staminate florets are always formed by the abortion of the gynoecium, the timing of abortion differs among species. Similarly, the formation of sterile lower florets showed different pathways that may operate at the level of floral meristem or organ identity. Finally, we discuss several reasons why patterns described for maize and closely related species may not be easily extrapolated to other grasses.
机译:我们使用比较方法和SEM调查了PCK(磷酸烯醇丙酮酸羧激酶)进化枝中花卉发育模式的变化和性别决定。我们确定了可能与性别决定有关的花卉发育模式的变异。根据下部小花的性别,雄蕊发育的顺序以及颖花和外分化的速度,鉴定出9种不同的小花发育模式。尽管雄蕊小花总是由妇科的流产形成,但流产的时间因物种而异。同样,不育小花的形成显示出不同的途径,这些途径可能在花分生组织或器官同一性的水平上起作用。最后,我们讨论了几个为什么玉米和紧密相关物种的模式可能不容易外推到其他草的原因。

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  • 来源
    《International journal of plant sciences》 |2010年第1期|24-33|共10页
  • 作者单位

    Department of Biology, University of Missouri, One University Boulevard, St. Louis, Missouri 63121, U.S.A. Morfologia Vegetal, Facultad de Ciencias Agracias, Universidad Nacional del Litoral, Kreder 2805, S3080HOF Esperanza, Santa Fe, Argentina;

    lnstituto de Botanica Darwinion, C.C. 22, B1642HYD San Isidro, Buenos Aires, Argentina;

    Morfologia Vegetal, Facultad de Ciencias Agracias, Universidad Nacional del Litoral, Kreder 2805, S3080HOF Esperanza, Santa Fe, Argentina;

    lnstituto de Botanica Darwinion, C.C. 22, B1642HYD San Isidro, Buenos Aires, Argentina;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spikelet and floret development; SEM; diversity; sex determination; poaceae; PCK clade;

    机译:小穗和小花发育;扫描电镜多样性性别决定;禾本科PCK进化枝;
  • 入库时间 2022-08-18 03:45:39

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