Structure of the seed coat of the Asteraceae species. I. Tribes Arctotideae, Cardueae, Mutisieae, Vernonieae

doi:10.14258/turczaninowia.21.4.6

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…This appearance of the achene's surface with thin embryo is not caused by the structure of the exocarp solely. Also, it is affected by the relief of the exotests placed under it, like in many asters with a tight fit of the embryo to the test (Boyko & Novozhilova, 2018). We defined the type of surface found in A. annua as reticulate-pitted.…”

Section: Discussionmentioning

confidence: 99%

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Carpological features of certain Artemisia species distributed in Ukraine

et al. 2020

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The achenes’ micromorphological structure of six Artemisia species (A. absinthium, A. annua, A. argyi, A. dracunculus, A. marschalliana, and A. vulgaris) distributed in Ukraine was investigated with the aim to identify taxonomically significant carpological features for the studied species.Fruits were collected from wild plants growing in the recreation areas of Kyiv and from the plants hosted in the living collection of the M.M. Gryshko National Botanical Garden of the NAS of Ukraine. Macromorphological features were studied with a binocular microscope Stemi 2000 Carl Zeiss. The ultrastructure of the surface was studied using a scanning electron microscope JSM-6700F JEOL, in the mode of secondary electron emission. Carbon spraying was performed using vacuum thermal evaporation of the vacuum universal post VUP-5M SELMI; platinum spraying was performed with an ion-plasma etching device JFC-1600 JEOL.All investigated species have a well-expressed, true, multicellular, symmetrical, multi-row carpopodium but differ by its shape. The surface of A. annua achenes is reticulate-pitted due to the specific structure of the exocarp and the exotests located below it. Species with lobed and continuous apical rim and species without a rim around the place of attachment of the corolla were found. It was established that the primary ultrastructure of investigated fruits is caused by the shape and character of mucous cell arrangement; epidermal cells of the exocarp are mostly compressed, without clear boundaries. Mostly a thin and inconspicuous cuticle, sometimes wrinkled, with layers and small outgrowths, causes the secondary ultrastructure of these fruits. We believe that the mentioned carpological features may be used as additional criteria in combination with other features to identify studied species.

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Section: Discussionmentioning

confidence: 99%

“…Such a situation encourages searching for new diagnostic criteria. Carpological features may be among the solutions because their importance for the taxonomy and phylogeny of Artemisia has been proved (Boyko, 2011;Boyko & Novozhilova, 2018;Bagatskaya & Vakulenko, 2013).…”

Section: Introductionmentioning

confidence: 99%

Carpological features of certain Artemisia species distributed in Ukraine

et al. 2020

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“…Ранее мы подробно описали особенности строения тесты различных представителей Cardueae. В работе Э. В. Бойко и Е. В. Новожиловой (Boyko, Novozhilova, 2018) указано, что для семянок трибы Cardueae таксономически важными признаками строения клеток экзотесты на продольном и поперечном срезах являются: а) характер вторичных утолщений стенок клеток экзотесты; б) степень палисадности (соотношение длины или высоты клеток к их ширине на поперечном срезе семени); в) пространственная ориентация клеток экзотесты (перпендикулярно, продольно или под углом) по отношению к оси семени.…”

Section: результаты и их обсуждениеunclassified

Morphological and anatomical structure of the cypselas of Alfredia (Asteraceae: Cardueae)

Новожилова¹,

Бойко²

2019

Turczaninowia

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Аннотация. Настоящая работа является продолжением серии наших исследований морфолого-анатомического строения семянок семейства Asteraceae. В работе представлены результаты изучения семянок видов рода Alfredia Cass. (A. cernua (L.) Cass., A. fetissowii Iljin, A. acantholepis Kar. et Kir. и A. nivea Kar. et Kir.) методами световой и сканирующей микроскопии. Карпологическое исследование позволило выявить диагностические признаки видов рода Alfredia: форма семянки (эллиптическая, удлиненно-эллиптическая или яйцевидная), скульптура поверхности перикарпия (гладкая, с тонкими редкими ребрышками), отсутствие коронки на верхушке семянки, плохо дифференцированный карпоподиум, соотношение толщины перикарпия и экзотесты (экзотеста превышает толщину перикарпия), количество рядов (2-6) и характер утолщения стенок (спиралевидные) клеток мезокарпия, наличие палисадного ряда клеток экзотесты, топография клеток экзотесты на продольном срезе: форма (наклонный параллелепипед), коэффициент палисадности клеток экзотесты (соотношение длины радиальных к длине тангентальных стенок). Проведен сравнительный анализ морфолого-анатомических признаков семянок представителей Alfredia и Synurus deltoides (Ait) Nakai на основании полученных данных и опубликованных ранее результатов исследования (Boyko et al., 2017). Выявлены основные отличия в строении семянок этих двух родов: строение апикальной части семянки, форма семянки на поперечном срезе, строение карпоподиума, соотношение толщины перикарпия и экзотесты (для семянок S. deltoides характерен толстый перикарпий, который в 10-20 раз превышает толщину экзотесты; у видов Alfredia экзотеста толще перикарпия), наличие у Alfredia и отсутствие у Synurus deltoides палисадного ряда клеток экзотесты; строение и топография клеток экзотесты. Результаты карпологического исследования показали, что семянки Alfredia и Synurus Iljin имеют принципиально различное строение, это подтверждает самостоятельность исследованных родов.

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MORPHOLOGY OF FRUITLETS OF FAR EASTERN SPECIES OF THE GENUS <i>POTENTILLA</i> (ROSACEAE)

Motorykina

2023

Botanicheskii Zhurnal

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The study of fruitlet morphology is carried out in 16 species of the genus Potentilla occurring in the Amur Region (Priamurye) and Primorye Territory. The sculpture of the fruitlet surface is shown to have diagnostic significance. The position, shape of the stylodium and the ratio of its length to the length of the fruitlet can be successfully used as diagnostic characters to distinguish the subgenera of the genus Potentilla. The inaccuracy of S.V. Yuzepchuk (1941) concerning the stylodia in the diagnoses of sections Niveae and Argenteae in the “Flora of the USSR” is corrected. The results of the research have shown that the stylodia in the species of these sections are short, rather thick, no longer than a mature fruitlet, instead of thin and long, as it was specified by S.V. Yuzepchuk. The presence of glands on the fruitlets of the members of section Pensylvanicae (P. approximata, P. conferta) can serve as a reason for the distinguishing this section within the subgenus Potentilla. The degree of expression of papillary outgrowths (short and long) in the lower part of the stylodium is a diagnostic trait of section Potentilla. The presence of covering hairs on the dorsal and ventral sides of the fruitlets in P. semiglabra, as well as a wide wing-like outgrowth on the dorsal side of the fruitlets in P. asperrima can be used in the taxonomy of the genus Potentilla as specific diagnostic traits. The species of Potentilla (P. amurensis, P. asperrima, P. centigrana) with a diploid set of chromosomes (2n = 14) are characterized by scarious and wing-like outgrowths on the fruitlets.

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Structure of the seed coat of the Asteraceae species. I. Tribes Arctotideae, Cardueae, Mutisieae, Vernonieae

Cited by 3 publications

References 14 publications

Carpological features of certain Artemisia species distributed in Ukraine

Carpological features of certain Artemisia species distributed in Ukraine

Morphological and anatomical structure of the cypselas of Alfredia (Asteraceae: Cardueae)

MORPHOLOGY OF FRUITLETS OF FAR EASTERN SPECIES OF THE GENUS <i>POTENTILLA</i> (ROSACEAE)

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