Anatomical structure of the stem and leaf of Sanguisorba parviflora and S. tenuifolia (Rosaceae)

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Abstract

Using light microscopy, a comparative study of the signs of the anatomical structure of the stem and leaf of 2 morphologically similar species of the genus Sanguisorba L.: S. parviflora (Maxim.) Takeda and S. tenuifolia Fisch. ex Link was carried out. In the stem structure of the studied species, the diagnostic feature is only the number of conducting beams on the cross section. We have not identified any taxonomically significant features in the structure of the leaf. We agree with the opinion of those taxonomists who consider S. tenuifolia as a synonym of S. parviflora. Conventionally, only quantitative signs can be informative: the thickness of the leaf blade, the length of the cells of the upper epidermis, the number of stomata per 1 mm2 of the leaf surface.

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About the authors

Anna V. Anokhina

Blagoveshchensk State Pedagogical University

Author for correspondence.
Email: annabgpu@yandex.ru
ORCID iD: 0000-0002-1113-4501

Candidate of Sciences in Biology, Docent

Russian Federation, Blagoveshchensk

Irina V. Lyubavina

Amur Branch of the Botanical Garden-Institute FEB RAS

Email: andrina97@mail.ru
ORCID iD: 0009-0006-8314-0501

Senior Laboratory Assistant

Russian Federation, Blagoveshchensk

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2. Fig. 1. Fragment of a cross-section of a stem: A – S. parviflora; B – S. tenuifolia. scl – sclerenchyma; phloem – phloem; xylem. Magnification 10×40

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3. Fig. 2. Fragment of a cross-section through a leaf blade: A – S. parviflora; B – S. tenuifolia. ep – epidermis; s. mes – columnar mesophyll; g. mes – spongy mesophyll. Magnification 10×40

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4. Fig. 3. Lower epidermis of the leaf: A – S. parviflora; B – S. tenuifolia. ep – epidermal cells; y – stomata. Magnified 10×40

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5. Fig. 4. Upper epidermis of the leaf: A – S. parviflora; B – S. tenuifolia. n. vol – peltate hair. Magnification 10×40

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