Programa de Pós Graduação em Biodiversidade, Laboratório de Ecologia Reprodutiva de Angiospermas, Departamento de Biologia, Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil.
Departamento de Biologia, Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil.
Microsc Res Tech. 2024 Aug;87(8):1889-1903. doi: 10.1002/jemt.24554. Epub 2024 Mar 31.
This article describes detailed and novel data on the anatomy and histochemistry of leaves, stems, and roots of Camonea umbellata (L.) A.R.Simões & Staples in different environments for the identification of characters with taxonomical value and of ecological importance, with provision of light and scanning electron microscopy images. To analyze the characters, we collected samples of the vegetative organs of three individuals in each of three populations, which were in a grazing area, an urban environment, and a biological reserve. The main diagnostic anatomical markers for the identification of C. umbellata include amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, long simple trichomes, epidermis with striated cuticle ornamentation, mesophyll with acute borders, presence of druses, secretory channels, angular collenchyma, fibrous pericycle in the stem, intraxylary phloem in the vegetative organs, oil bodies throughout the midrib, petiole, stem and root, and epicuticular waxes of the crust and coiled rodlet types. Since the characters above did not show variation in the environments evaluated, we consider these characters taxonomically useful for the identification of C. umbellata. RESEARCH HIGHLIGHTS: The anatomy of the aerial vegetative organs of Camonnea umbellata retains common Convolvulaceae characters. The sinuosity of the epidermal cell walls and the density of trichomes in the epidermis of the petiole were visually variable characters among the analyzed individuals. Amphistomatic leaves, tetracytic and brachyparatetracytic stomata, peltate trichomes, epidermis with striated cuticle ornamentation, dorsiventral mesophyll with border acute, presence of druses, secretory structures, angular collenchyma, fibrous pericycle in the stem, intraxillary phloem, presence of oil bodies in all organs, and epicuticular waxes of the crust type and coiled rods were considered important anatomical markers for the recognition and correct identification of Camonea umbellata.
本文详细描述了伞花马利筋（Camonea umbellata）在不同环境下的叶、茎和根的解剖结构和组织化学特征，为具有分类学价值和生态重要性的特征提供了光镜和扫描电子显微镜图像。为了分析这些特征，我们在放牧区、城市环境和生物保护区三个种群中，每个种群采集了三株个体的营养器官样本。鉴定伞花马利筋的主要解剖学特征包括：两面叶、四面体型和短四面体型气孔、盘状毛、长简单毛、具条纹状表皮角质层纹饰的表皮、具锐角的边缘型中肋薄壁组织、晶簇存在、分泌道、棱角状韧皮部、茎中的纤维状中柱鞘、营养器官中的木质部、贯穿中脉、叶柄、茎和根的油体以及具壳状和卷曲棒状类型的表皮蜡质。由于在评估的环境中未观察到这些特征的变异，因此我们认为这些特征在分类学上有助于鉴定伞花马利筋。研究亮点：伞花马利筋的气生营养器官解剖结构保留了旋花科的常见特征。在分析的个体中，叶柄表皮细胞壁的弯曲和表皮毛密度是肉眼可见的可变特征。两面叶、四面体型和短四面体型气孔、盘状毛、具条纹状表皮角质层纹饰的表皮、背腹型中肋薄壁组织、边缘具锐角、晶簇存在、分泌结构、棱角状韧皮部、茎中的纤维状中柱鞘、木质部、所有器官中油体的存在以及具壳状和卷曲棒状类型的表皮蜡质被认为是识别和正确鉴定伞花马利筋的重要解剖学特征。
