Organizing co mmittee

 
 

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Poster presentation 
131 
ANATOMICAL STRUCTURE OF THE ASSIMILATED ORGANS OF Physalis 
angulata IN THE NATURAL CONDITIONS 
 
S.F. Aripova
1
, G.M. 
 
Duschanova
2
, I. Xikmatullaev
3
, M.A.
 
Isabekova
2
 
 
1) S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of 
the Republic of Uzbekistan st. Mirzo-Ulugbek, 77, 100170 Tashkent 
2) Tashkent Pedagogical University named after Nizami, 
3
Kokan Pedagogical Institute 
e-mail: [e-mail]
, [phone] 
 
The anatomical structure of the assimilating organs of the raw material of the medicinal 
plant 
Physalis angulata
in the generative phase was studied on the basis of the developed 
microscopic methods. The epidermis was studied on paradermal and transverse sections. 
Transverse sections of the leaf are made through the middle, petiole - the base. When 
studying the anatomical structure of the leaves and petiole of 
Physalis angulata
, diagnostic 
signs and localization of biologically active substances in organs and tissues were determined. 
On the paradermal section, the outlines of the epidermal cells of the leaves on the adaxial side 
of the leaf are slightly sinuous, not numerous, while the abaxial side is more sinuous, the 
projection is polygonal and numerous. The leaves are amphistomatic, the shape of the stomata 
is oval, non-immersed, anomocytic and hemiparacytic type and most numerous on the abaxial 
side, few on the adaxial. Leaf mesophyll in transverse section of dorsiventral type. The 
epidermis consists of a single row of cells, covered on the outside with a thick-walled 
cuticle layer and pubescent with single- and two-celled simple ones with papillary hairs 
along the veins and multicellular glandular trichomes on the leaf surface. The presence 
or absence of trichomes in an epidermal cell can serve as a taxonomic feature. The 
palisade parenchyma is chlorophyll-bearing and consists of one row of large and 
elongated cells. Spongy chlorophyll-bearing parenchyma is round-oval and large-small-
celled with small intercellular spaces, consists of 5-6 rows of cells and is located under 
the palisade parenchyma. Between the palisade and spongy parenchymal cells, 
numerous druses of calcium oxalate were found, which have spherical formations 
consisting of many small intergrown crystals. The main leaf vein protrudes on the abaxial 
side. Under the adaxial and abaxial epidermis in the costal parts of the leaf there is an 
angular 2-4 row collenchyma. The rest of the vein is occupied by the main parenchyma, 
in which one large vascular bundle is immersed, parenchyma cells are thin and thick-
walled, multifaceted, among which hydrocytic cells are found. Conductive bundles, 
closed collateral type, are not sclerified, due to the absence of mechanical tissues 
(sclerenchyma) in them. The localization of biologically active substances in the 
assimilation organs of palisade and spongy cells was determined. The petiole is kidney-
shaped in cross section, the structure is of the parenchymal-beam type and protrudes on 
the abaxial side of the leaf. Epidermal cells are single-row round-oval. The peripheral 
parts of the petiole are most sclerified due to the presence of a group of multi-row cells of 
the angular type collenchyma under the epidermal cell, which alternate with 4-5 row 
chlorophyll-bearing parenchyma. The main part of the petiole is made up of parenchymal 
cells that contain biologically active substances and hydrocytic cells are found between 
them. Between the parenchymal cells there are 1 large and 2 small vascular bundles. 
Conductive bundles of closed collateral type, consist of phloem and xylem. These 
revealed structural diagnostic features of the leaf are species-specific and can be used in 
taxonomy and in the identification of plant materials for this species. 

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Poster presentation 
132