Vascularisation de la fleur de Calla palustris (Araceae)

1983 ◽  
Vol 61 (6) ◽  
pp. 1718-1726 ◽  
Author(s):  
Denis Barabé ◽  
Michel Labrecque
Keyword(s):  
Floral Morphology ◽  
Vascular System ◽  
Anatomical Study ◽  
Ovary Wall ◽  
Vascular Plexus ◽  
Generic Relationships ◽  
Axile Placentation

Based on floral vascular system, the authors analysed the problem of pseudomonomeria, and the inter-generic relationships within the Calloideae. The hermaphrodite flowers of Calla do not have a perianth. The superior, unilocular ovary is surrounded by 10 to 12 extrorse stamens. Most of these flowers have an ovary wall which receives three carpellary traces. These three traces divides again to produce 9–12 bundles. At the base of the ovules, an oval vascular plexus can be seen on which the traces of the ovules are inserted. It originates from three carpellary bundles, even though it is connected to certain staminal traces. The anatomical study showed that the syncarpous gynoecium of Calla is composed of three carpels that are joined edge to edge. The bitegmic, anatropous, apotropous ascending ovules are located on a basal placenta. The number of ovules varies from 4 to 10. The basal placentation of Calla is of the basal-axile type. It derives from an axile placentation which is similar to that found in Lysichitum. Among the Calloideae, it is with Orontium aquaticum that Calla palustris shares the greatest number of characters: superior ovary, unilocular, tricarpellate gynoecium, basal placentation, and a reticulate pollen. In Orontium, the existence of 6 tepals and 6 stamens was noted while in Calla, 10–12 stamens were observed. It is possible that 6 of the 12 stamens of Calla, correspond to the 6 tepals of Orontium. The subfamily Calloideae is a heterogeneous taxon at the level of floral morphology.

scholarly journals Floral morphology and anatomy of Dalechampia alata Klotzsch ex Baill. (Euphorbiaceae), with emphasis on secretory structures

2016 ◽  
Vol 76 (1) ◽  
pp. 233-244 ◽  
Author(s):  
F. M. Martins ◽  
I. L. Cunha-Neto ◽  
T. M. Pereira
Keyword(s):  
Light Microscope ◽  
Chemical Nature ◽  
Floral Morphology ◽  
Staminate Flower ◽  
Ovary Wall ◽  
Transmitting Tissue ◽  
Secretory Structures ◽  
First Report ◽  
Meristematic Activity ◽  
Secretory Glands

Abstract The morphology and anatomy of the flower of Dalechampia alata, as well as the chemical nature of the exudates secreted in the inflorescence were studied using light microscope. This is the first report showing the presence of colleters in the genus Dalechampia. In the staminate flower occur a group of small secretory glands. The histochemical results indicate that the substance secreted from the glands is lipidic and resinuous in nature, while in the colleters it consists of polysaccharides and lipid-rich substances. The ovule of D. alata are anatropous, subglobose and bitegmic. It presents obturator, micropyle occluded by nucellar beak and meristematic activity in the ovary wall. The secretion produced in the stigmatic and transmitting tissue consists of polysaccharides.

scholarly journals Phylogenetic implications of the anatomical study of the Amburaneae clade (Fabaceae: Faboideae)

2020 ◽  
Vol 194 (1) ◽  
pp. 69-83
Author(s):  
João Pedro Silvério Pena Bento ◽  
Edna Scremin-Dias ◽  
Flávio Macedo Alves ◽  
Vidal De Freitas Mansano ◽  
Ângela Lúcia Bagnatori Sartori
Keyword(s):  
Vascular System ◽  
Phylogenetic Analyses ◽  
Glandular Trichomes ◽  
Anatomical Study ◽  
Molecular Data ◽  
Secretory Structures ◽  
Phylogenetic Implications ◽  
Secretory Cavities ◽  
Morphological And Molecular Data ◽  
Vegetative Characters

Abstract Phylogenetic analyses of early-diverging Faboideae have indicated that genera previously positioned in distinct tribes are instead closely related, e.g. in the Amburaneae clade, and the relatively recent rearrangements of many genera into clades has hampered the identification of morphological synapomorphies for previously unrecognized clades. Our aims are to evaluate anatomical vegetative characters of leaflets attached to reproductive features in the Amburaneae clade, to identify new synapomorphies for the clade and subclades, to identify characters supporting intergeneric relationships and diagnostic characters for the genus and species and to provide information about the morphology and histochemistry of secretory structures. The study was based on the anatomy of the leaflet of 19 species of the Amburaneae clade. Papillae cells, the presence of vascular system units and hypodermis are shared features of Amburaneae. Anatomical characters of the leaflet can be diagnostic at the generic and specific levels in Amburaneae. Secretory structures found in the clade are secretory cavities, secretory channels, idioblasts, mucilaginous epidermal cells and glandular trichomes. The broader concept of Amburaneae is reinforced here by morphological and molecular data, with the identification of new synapomorphies. Our dataset supports the intergeneric relationships resolved by molecular data.

An anatomical study on the forearm vascular system

1996 ◽  
Vol 24 (5) ◽  
pp. 293-299 ◽  
Author(s):  
Harunobu Shima ◽  
Kohsuke Ohno ◽  
Ken-ich Michi ◽  
Kaoru Egawa ◽  
Reiji Takiguchi
Keyword(s):  
Vascular System ◽  
Anatomical Study

The Vascular System of the Superior Auricular Artery: Anatomical Study and Clinical Application

2011 ◽  
Vol 37 (1) ◽  
pp. 65-72 ◽  
Author(s):  
SANG-HA OH ◽  
HYUN WOO KYUNG ◽  
NAKHEON KANG ◽  
YOUNG JOON SEO ◽  
DONG-WOON KIM
Keyword(s):  
Clinical Application ◽  
Vascular System ◽  
Anatomical Study

Studies in the Hypoxidaceae. II. Floral morphology and anatomy

Bothalia ◽  
1978 ◽  
Vol 12 (3) ◽  
pp. 429-435 ◽  
Author(s):  
M. F. Thompson
Keyword(s):  
Floral Morphology ◽  
Vascular Anatomy ◽  
Close Relationship ◽  
Single Flower ◽  
Axile Placentation

The inflorescence and flowers of representatives of Spiloxene, Pauridia and  Empodium were studied. The inflorescence shows a reduction from a several-flowered umbel to a single flower. The anthers are non-versatile in all three genera, unlike those of Hypoxis and  Rhodohypoxis. In  Spiloxene and Pauridia the ovary is 3-locular with axile placentation, while in  Empodium it is unilocular with three parietal placentas. The floral vascular anatomy of the three genera is described and the generic differences pointed out. The close relationship between Spiloxene and  Pauridia is demonstrated and the inclusion of  Pauridia in the Hypoxidaceae is supported. Spiloxene is regarded as generically distinct from Hypoxis.

scholarly journals Anatomy and development of gynoecium in Tapiscia sinensis Oliv. and its implications for the origin of carpels

2019 ◽  
Vol 48 (4) ◽  
pp. 933-941
Author(s):  
Guiliang Xin ◽  
Xilu Ni ◽  
Wenzhe Liu
Keyword(s):  
Vascular Bundle ◽  
Vascular System ◽  
Embryo Sac ◽  
Ovary Wall ◽  
Present Observation ◽  
Bisexual Flower ◽  
Carpel Wall

Tapiscia sinensis Oliv. (Tapisciaceae) is a rare tree endemic in China. Characteristic of its androdioecy is the coexistence of male and hermaphroditic flowers. Its bisexual flower bears five stamens surrounding the gynoecium, which is composed of a terminal style and an ovary at the base. The style has a bifid stigmata, which is hollow and longer than stamens. The ovary is syncarpous, unilocular, formed by two fused carpels, with a basal or subbasal placenta. Ovule is bitegmic, anatropous, borne on the placenta and supplied by an amphicribral vascular bundle arising directly from receptacle. The carpel wall is supplied by a collateral vascular bundle. The ovule’s position changes from initially inserted on the ovary base to later attached to the middle of the ovary wall due to unequal growth of the embryo sac. Based on the present observation and others, the implications of vascular system in Tapiscia for the evolution of carpel are discussed.

Blood Supply to the Nape-of-the-Neck Flap: Implications from a Fetal Anatomical Study

1977 ◽  
Vol 86 (3) ◽  
pp. 329-332 ◽  
Author(s):  
George Schein ◽  
Joel C. Kahane ◽  
Eugene N. Myers
Keyword(s):  
Blood Supply ◽  
Vascular System ◽  
Anatomical Study ◽  
Longitudinal Axis ◽  
Cervical Region ◽  
Occipital Artery ◽  
Posterior Auricular Artery ◽  
Superficial Portion

The blood supply to the nape-of-the-neck flap was studied in 11 18-week-old fetuses by infusion of methyl methacrolate into the vascular system. Dissection of the posterior cervical region showed that the major blood supply to this area was through perforating vessels from the superficial portion of the ramus decendens of the occipital artery and the posterior auricular artery. Since a “named artery” was not found in the longitudinal axis of the flap, as is reported in the literature, it should be considered a cutaneous rather than an arterial flap. The findings of this study are consistent with classical anatomical descriptions about blood supply to this region. Collateral vascular pathways from the occipital artery and the costicervical trunk are discussed.

AN ANATOMICAL STUDY OF CANE AND GROWN GALLS

1954 ◽  
Vol 32 (4) ◽  
pp. 527-530 ◽  
Author(s):  
W. E. McKeen
Keyword(s):  
Sugar Beet ◽  
Outer Layer ◽  
Vascular System ◽  
Broad Bean ◽  
Anatomical Study

An anatomical study was made of galls which occur naturally on the stems of boysenberry and Himalaya blackberry plants. The galls form at any region of the stem of the floral canes of plants systemically infected with Agrobacterium rubi and originate from or near the cambial layer, and not from the outer layer of the pericycle. The vascular system in galls caused by A. rubi and A. tumefaciens on broad bean, tomato, sugar beet, loganberry, and Himalaya blackberry plants is connected to the vascular system of the organ on which they are growing.

scholarly journals An Anatomical Study of the Bronchial Vascular System and its Variations in Disease

Thorax ◽  
1950 ◽  
Vol 5 (3) ◽  
pp. 207-221 ◽  
Author(s):  
P. Marchand ◽  
J. C. Gilroy ◽  
V. H. Wilson
Keyword(s):  
Vascular System ◽  
Anatomical Study

Angioarchitecture of spider veins

Phlebologie ◽  
2006 ◽  
Vol 35 (01) ◽  
pp. 24-29 ◽  
Author(s):  
H. P. Simon ◽  
U. Böhler ◽  
V. Wienert
Keyword(s):  
Muscle Tissue ◽  
Vascular System ◽  
Morphological Characteristics ◽  
Corrosion Casts ◽  
Post Mortem ◽  
Vascular Plexus ◽  
Significant Difference ◽  
Polygonal Pattern ◽  
Spider Veins ◽  
Scanning Electron

SummaryKnowledge of the anatomy of spider veins is scant and contradictory. The authors therefore decided to investigate the angioarchitecture of these lesions, i.e. the anatomy, interconnections, and morphological characteristics of the cutaneous vessels and capillaries that comprise them. Material and methods: A highly polymerising plastic was injected into the vascular system of skin-muscle tissue blocks so as to produce true-to-scale casts (corrosion casts) of the angioarchitecture of spider veins. In 35 skin-muscle tissue blocks obtained post mortem a total of 28 spider veins were found. Corrosion casts of these were examined by scanning electron microscopy with particular regard to their connections with larger veins. Results: All the spider veins examined showed the typical polygonal pattern of endothelial cell nuclear imprints. The subpapillary vascular plexus showed incompetent microvenous valves. A statistically significant difference was found between the diameter of spider veins of red and blue appearance (0.227 mm and 0.435 mm, respectively; p<0.001). Feeder veins were only found in the case of stellate and fan-shaped spider veins. Conclusions: Spider veins are pathological venous changes in the subpapillary vascular plexus. Incompetent microvenous valves may play a role in their formation. In certain clinical situations sclerotherapy of spider veins may fail to achieve a lasting cure, since the feeder veins that drain the capillaries cannot be sclerosed.

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