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首页> 外文期刊>International journal of plant sciences >ELUCIDATING ENIGMATIC FLORAL ISSUES IN COPAIFERA LANGSDORFFII DESF. (LEGUMINOSAE, CAESALPINIOIDEAE)
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ELUCIDATING ENIGMATIC FLORAL ISSUES IN COPAIFERA LANGSDORFFII DESF. (LEGUMINOSAE, CAESALPINIOIDEAE)

机译：消除COPAIFERA LANGSDORFFII DESF中的昆虫性花卉问题。 （豆蔻科，CAESALPINIOIDEAE）

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摘要

This study focuses on the floral development of Copaifera langsdorffii to elucidate uncertain features in its floral morphology, such as the tetramerous calyx, lack of petals, blackened anthers and their supposed sterility, as well as polyembryony. Buds and flowers were dissected and prepared for examination under scanning electron and light microscopes. The floral apex initiates two bracteoles, five sepals, five petals, five outer stamens, five inner stamens, and one carpel. Order is helical for sepals, reversed unidirectional for the petals, and unidirectional for two whorls of stamens. The tetramerous calyx results from the union of two adaxial sepal primordia, which forms one large sepal and three other smaller sepals. Although the flower lacks petals, the petal primordia are initiated but do not elongate like the other floral organs, remaining as petal rudiments. Ten stamens are formed in two distinct whorls. Formation within each whorl is almost simultaneous, and the inner whorl is formed shortly after the outer. During organ elongation, the inner stamen primordia bases are reoriented outward, resulting in a single whorl of stamens. The darkened anthers have viable pollen grains. Thus, there is no relation between sterility and the dark coloration of the anthers. No signs of extranumerary embryos are observed; therefore, polyembryony is not confirmed. Although studies on floral development of Detarieae have been reported, few Neotropical genera of the tribe (such as Copaifera) have been studied.
机译：这项研究侧重于Copifera langsdorffii的花期发育，以阐明其花序形态的不确定特征，例如四叶萼，无花瓣，黑花药及其假定的不育性以及多胚芽。切出芽和花，并准备在扫描电子和光学显微镜下检查。花的先端起两个小片，五个萼片，五个花瓣，五个外雄蕊，五个内雄蕊和一个心皮。萼片为螺旋状，花瓣为单向倒序，雄蕊的两个轮生为单向。四倍体花萼是由两个近端萼片原基的并合形成的，后者形成一个大的萼片和三个其他的较小的萼片。虽然花没有花瓣，但花瓣原基已开始形成，但不像其他花器官那样伸长，保留为花瓣残基。十个雄蕊形成两个不同的轮生。每个旋涡内的形成几乎是同时发生的，而内旋涡则在外旋之后不久形成。在器官伸长过程中，内部雄蕊原基基面向外重新定向，形成单一的雄蕊轮。深色的花药具有可行的花粉粒。因此，无菌性与花药的深色之间没有关系。没有观察到多余的胚胎的迹象。因此，未确认多胚。尽管已经报道了对tar草的花期发育的研究，但是很少研究该部落的新热带属（例如Copaifera）。

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  • 来源
    《International journal of plant sciences》 |2010年第8期|p.834-846|共13页
  • 作者

    Giseli D. Pedersoli; rnJuliana V. Paulino; rnViviane C. Leite; rnSimone P. Teixeira;

  • 作者单位

    Departamento de Ciencias Farmaceuticas, Faculdade de Ciencias Farmaceuticas de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, Sao Paulo 14040-903, Brazil;

    rnPrograma de Pos-Graduacao em Biologia Comparada, Departamento de Biologia, Faculdade de Filosofia, Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, Sao Paulo 14040-903, Brazil;

    rnDepartamento de Ciencias Farmaceuticas, Faculdade de Ciencias Farmaceuticas de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, Sao Paulo 14040-903, Brazil;

    rnDepartamento de Ciencias Farmaceuticas, Faculdade de Ciencias Farmaceuticas de Ribeirao Preto, Universidade de Sao Paulo, Ribeirao Preto, Sao Paulo 14040-903, Brazil;

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  • 正文语种 eng
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  • 关键词

    caesalpinioideae; floral anatomy; floral development; leguminosae; morphology; ontogeny;

    机译：es科花解剖花的发育豆科形态学;本体论;
  • 入库时间 2022-08-18 03:45:40

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