Species of Tillandsia L. are widely distributed in Brazilian ecosystems, and in the state of Bahia they can be found in the Atlantic Forest, Caatinga and Cerrado biomes. Studying the reproductive aspects of these species can support their management and conservation. In particular, stigma morphology is a conserved trait of Bromeliaceae and stigma receptivity can influence the success of pollination. The objective of this study was to characterize the morphoanatomy and classify the stigma types of Tillandsia species by means of light and scanning electron microscopy, as well as to evaluate the stigma receptivity by different methods and at three floral development stages. A total of 21 Tillandsia species found in Bahia were evaluated. The stigma receptivity was assessed with hydrogen peroxide (3%) and a solution of α‐naphthyl acetate. Four stigma types were observed: conduplicate‐spiral for the species of the Tillandsia subgen. Tillandsia, simple‐erect for species of T. subgen. Diaphoranthema, and simple‐truncate for the species of T. subgen. Phytarrhiza. The species of the T. subgen. Anoplophytum had three morphological types, conduplicate‐spiral, conduplicate‐patent and simple‐erect. All the species had trifid stigmas, monostratified epidermis, numerous idioblasts containing raphides in the fundamental parenchyma and an individual vascular bundle for each carpel. In all the species studied by the two methods of stigma receptivity the highest enzyme activity was observed during anthesis. The morphoanatomy of the stigma and style provides important information for the taxonomy of Tillandsia and the data on stigma receptivity can support studies of the reproduction and conservation of these species.

中文翻译：

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发生在巴西巴伊亚州的铁兰（凤梨科）的形态解剖和柱头接受性

Tillandsia L.的物种广泛分布在巴西的生态系统中，在巴伊亚州，可以在大西洋森林，Caatinga和Cerrado生物群落中找到。研究这些物种的生殖方面可以支持其管理和保护。特别地，柱头形态是凤梨科的一种保守性状，柱头的接受能力会影响授粉的成功。这项研究的目的是通过光镜和扫描电子显微镜表征铁兰属植物的形态解剖并对其柱头类型进行分类，并通过不同的方法并在三个花发育阶段评估柱头的接受性。共有21个铁兰对在巴伊亚州发现的物种进行了评估。用过氧化氢（3％）和乙酸α-萘酯溶液评估柱头接受度。观察到四个柱头类型：对折螺旋对的物种铁兰亚属。铁兰（Tillandsia），T物种的简单直立。亚基因。泛黄皮和T的简单截断。亚基因。紫草。T的种类。亚基因。紫草具有三种形态学类型，分别是螺旋形，螺旋形和简易形。所有物种都有三裂的柱头，单层表皮，大量的成纤维细胞，其基本实质中含有杀虫剂，每个心皮都有单独的维管束。在通过柱头接受性的两种方法研究的所有物种中，花期观察到最高的酶活性。柱头和花柱的形态解剖为铁兰分类学提供了重要信息，柱头接受性的数据可以支持对这些物种的繁殖和保存的研究。