Fruit anatomy and histogenesis in Mediterranean species of Arbutus (Ericaceae: Arbutoideae): ecological and morphogenetic aspects

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
Olga V Yatsenko, Alexey N Sorokin, Mikhail S Romanov, Alexey V F Ch Bobrov, Petr S Iovlev, Nikita S Zdravchev, Anton S Timchenko, Anna A Mikhaylova, Natalia D Vasekha, Maxim V Kandidov, Kirill V Kuptsov
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Abstract

Details of fruit anatomy and pericarp histogenesis were studied in Mediterranean species of Arbutus with the aim to determine the morphogenetic fruit type, to reveal the functional and ecological significance of fruit structure, and to suggest the most probable scenarios of fruit structural transformations in Arbutoideae (Ericaceae). The pericarp of the coenocarpous berries of Arbutus is differentiated into: one-layered exocarp, multilayered parenchymatous mesocarp with scattered solitary and groups of sclereids, and one-layered endocarp composed of thin-walled cells. The warts covering the fruit surface are formed by parenchymatous cells of the mesocarp and the exocarp. The process of pericarp development in Arbutus is divided into four periods, which correlate with the phenology and climatic factors of the Mediterranean region. The origin of the dormancy period in the middle part of fruit development in Arbutus is interpreted as an important adaptation to the arid Mediterranean climate. The data obtained suggest that both the berry of Arbutus and the pyrenariums of Arctostaphylos and Arctous are highly specialized fruit types that could not have derived from each other. The capsule of Hamamelis type of Enkianthoideae is recognized as the original fruit type of the berries and pyrenariums of Arbutoideae.
杜鹃花科(Ericaceae: Arbutoideae)地中海种的果实解剖和组织发生:生态学和形态发生学方面的问题
对地中海地区的熊果属植物的果实解剖和果皮组织发生细节进行了研究,目的是确定形态发生的果实类型,揭示果实结构的功能和生态意义,并提出熊果属(菊科)果实结构转变的最可能情况。熊果科共果浆果的果皮可分为:单层外果皮、多层实质中果皮(其中散布着单生和群生的硬核)和由薄壁细胞组成的单层内果皮。果实表面的疣由中果皮和外果皮的实质细胞形成。熊果的果皮发育过程分为四个时期,与地中海地区的物候和气候因素相关。熊果的休眠期起源于果实发育的中期,这被认为是对干旱的地中海气候的重要适应。所获得的数据表明,熊果的浆果和牛膝草和牛膝草的果核都是高度特化的果实类型,不可能相互衍生。金缕梅属(Enkianthoideae)的蒴果被认为是熊果科(Arbutoideae)浆果和果核的原始果实类型。
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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