Flower morphogenesis and gametophyte fertility attest to the rare condition of gynomonoecy in Parietaria debilis (Urticaceae)

Botany ◽  
2020 ◽  
Vol 98 (12) ◽  
pp. 703-715
Author(s):  
Giseli Donizete Pedersoli ◽  
Simone Pádua Teixeira
Keyword(s):  
Pistillate Flower ◽  
Rare Condition ◽  
Pollen Ultrastructure ◽  
Flower Buds ◽  
Anatomical Studies ◽  
Flower Morphogenesis ◽  
Viable Seeds

Parietaria debilis G. Forst. is gynomonoecious, which is a rare condition in the Urticaceae family and among angiosperms. Apetalous flowers of two different morph types (monoclinous, pistillate) occur in the same inflorescence and are reduced in size and in the number of whorls and of organs per whorl. The objective of this study was to compare the morphogenesis of monoclinous and pistillate flowers to determine whether the monoclinous flowers produce fertile gametophytes, and elucidate the pathways leading to the absence of stamens and to the changes in number of whorls and organs per whorl. Flower buds and flowers (non-fertilized, fertilized) were processed for surface and anatomical studies. Pollen ultrastructure and viability were determined. Inflorescences with fertilized flowers were checked for the presence and location of fruits/viable seeds. The monoclinous flower has four sepals, four stamens, and a uniovulate pseudomonomerous gynoecium. In the pistillate flower, the stamens are absent or, rarely, aborted. No petals are formed. The gynoecium is pseudomonomerous, originated as a central primordium that differentiates into two carpels, but only one develops and houses an ovule. Monoclinous and pistillate flowers produce viable seeds. Thus, our data confirmed that this species is indeed gynomonoecious.

scholarly journals Multiple Shoot Formation in Eggplant (Solanum melongena L.)

1970 ◽  
Vol 16 (1) ◽  
pp. 53-61 ◽  
Author(s):  
RH Sarker ◽  
Sabina Yesmin ◽  
MI Hoque
Keyword(s):  
High Frequency ◽  
Solanum Melongena ◽  
Shoot Formation ◽  
Multiple Shoot ◽  
Local Varieties ◽  
Anatomical Studies ◽  
Cotyledonary Leaf ◽  
Multiple Shoot Regeneration ◽  
Viable Seeds

Among the in vitro derived different explants such as cotyledonary leaf, hypocotyl, shoot tip and root of two local varieties, namely Singhnath and Kazla (BARI Begun-4) of eggplant (Solanum melongena L.) cotyledonary leaf was found to be the best for multiple shoot regeneration. High frequency direct organo-genesis of shoots was achieved from cotyledonary leaf in MS supplemented with 1.0 mg/l BAP and 1.0 mg/l Kn. Anatomical studies using freezing microtome supported the formation of shoots through organogenesis. Proliferation and elongation of such shoots were obtained in hormone free MS. Moreover, the regenerated shoots produced healthy roots when they were cultured on MS without hormonal supplements. Following the formation of roots the in vitro raised plantlets were successfully established in soil. Viable seeds were obtained from the in vitro raised mature plants.Key words: Regeneration, Multiple shoot, EggplantDOI = 10.3329/ptcb.v16i1.1106Plant Tissue Cult. & Biotech. 16(1): 53-61, 2006 (June)

Ultrastructure of the soil fungus, Geomyces pannorus

1984 ◽  
Vol 42 ◽  
pp. 738-739
Author(s):  
J. A. Traquair ◽  
E. G. Kokko
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fine Structure ◽  
Low Temperatures ◽  
Soil Fungus ◽  
Organic Soils ◽  
Anatomical Studies ◽  
Transmission Electron ◽  
Electron Microscopical ◽  
Scanning Electron

With the advent of improved dehydration techniques, scanning electron microscopy has become routine in anatomical studies of fungi. Fine structure of hyphae and spore surfaces has been illustrated for many hyphomycetes, and yet, the ultrastructure of the ubiquitous soil fungus, Geomyces pannorus (Link) Sigler & Carmichael has been neglected. This presentation shows that scanning and transmission electron microscopical data must be correlated in resolving septal structure and conidial release in G. pannorus.Although it is reported to be cellulolytic but not keratinolytic, G. pannorus is found on human skin, animals, birds, mushrooms, dung, roots, and frozen meat in addition to various organic soils. In fact, it readily adapts to growth at low temperatures.

Purification of an antifungal PR-5 protein from flower buds of Brassica campestris and cloning of its gene

1997 ◽  
Vol 101 (3) ◽  
pp. 583-590 ◽  
Author(s):  
Na Eun Cheong ◽  
Yeon Ok Choi ◽  
Woe Yeon Kim ◽  
Sun Chang Kim ◽  
Moo Je Cho ◽  
...  
Keyword(s):  
Brassica Campestris ◽  
Flower Buds ◽  
Its Gene

Severe Antithrombin III Deficiency in an Infant Associated with Multiple Arterial and Venous Thromboses

1976 ◽  
Vol 36 (03) ◽  
pp. 495-502 ◽  
Author(s):  
Geoffrey Mendelsohn ◽  
Edward D. Gomperts ◽  
Dennis Gurwitz
Keyword(s):  
Antithrombin Iii ◽  
Adult Life ◽  
Rare Condition ◽  
Male Infant ◽  
Liver Cells ◽  
Liver Pathology ◽  
Fixed Tissue ◽  
Formalin Fixed Tissue ◽  
First Case ◽  
At Iii

SummaryInherited antithrombin III (AT-II, heparin cofactor) deficiency is a rare condition, presenting with thrombotic disease in adult life. This paper reports an 8 months old South African Black male infant with multiple large vessel venous and arterial thromboses, and E. coli septicaemia. This was associated with an extremely low plasma AT-II level. Micronodular cirrhosis and intracytoplasmic hyaline globules in the liver cells were present. These globules were eosinophilic, and PAS-positive after diastase. They measured approximately 5 μ to 30 μ in diameter, occurred singly in the liver cells and were located mainly in the periportal areas. The histological findings in the liver are similar to those observed in α1-antitrypsin (AAT) deficiency in which the intracytoplasmic globules represent accumulation of altered AAT. Immunochemical studies carried out on formalin fixed tissue failed to detect cross reaction material with anti-α1 antitrypsin or anti-AT III antiserum. This is the first case report of AT-III deficiency presenting in infancy. It is also the first case associated with distinctive liver pathology.The available data presented are insufficient to distinguish between an inborn defect and acquired causes of the severely depressed AT-III plasma level and the distinctive liver pathology.

Supraspinatus and Infraspinatus Tendon Tears: New Insights from Recent Anatomical Studies

2019 ◽  
Author(s):  
M. Tuite ◽  
A. U. Patel ◽  
T. Scerpella ◽  
B. Chan ◽  
G. Baer ◽  
...  
Keyword(s):  
Anatomical Studies ◽  
Tendon Tears ◽  
Infraspinatus Tendon

Free-Floating Thrombus in the Distal Internal Carotid Artery Causing a Stroke

2020 ◽  
Author(s):  
Spyros Papadoulas ◽  
Konstantinos Moulakakis ◽  
Natasa Kouri ◽  
Petros Zampakis ◽  
Stavros K. Kakkos
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Medical Management ◽  
Internal Carotid ◽  
Treatment Strategies ◽  
Rare Condition ◽  
Residual Stenosis ◽  
Floating Thrombus ◽  
Distal Internal Carotid Artery ◽  
Carotid Bulb

AbstractWe present a patient suffering from a stroke with a free-floating thrombus extending up to the distal internal carotid artery. The thrombus was totally resolved after a 2-week anticoagulation regimen without leaving behind any severe residual stenosis in the carotid bulb. The optimal treatment of this rare condition remains uncertain. We report some important treatment strategies that have been used in the literature, emphasizing the anticoagulation as the mainstay of therapy. Immediate surgical and interventional manipulations carry the risk of thrombus dislodgement and embolization and should be considered if there are recurrent symptoms despite medical management.

Fournier's gangrene as Amyand's hernia complication

2019 ◽  
Vol 98 (7) ◽  
pp. 291-296
Keyword(s):  
Case Report ◽  
Case Reports ◽  
Rare Condition ◽  
Sporadic Case ◽  
Fournier’S Gangrene ◽  
Amyand’S Hernia ◽  
Fournier's Gangrene ◽  
Randomized Controlled Studies ◽  
Based Medicine ◽  
Hernia Complication

Introduction: Fournier’s gangrene is a rare but fast deteriorating and serious condition with high mortality. In most cases, it is characterized as necrotizing fasciitis of the perineum and external genitals. Amyand’s hernia is a rare condition where the appendix is contained in the sac of an inguinal hernia. Inflammatory alterations in the appendix account only for 0.1 % of the cases when Amyand’s hernia is verified. Fournier’s gangrene as a complication of a late diagnosis of appendicitis located in the inguinal canal is described in the literature as rare case reports. Case report: The case report of a 70-year-old patient with Fournier’s gangrene resulting from gangrenous appendicitis of Amyand’s hernia. Conclusion: Fournier’s gangrene as a complication of Amyand’s hernia is a rare condition. Only sporadic case reports thereof can be found in the literature. Because of the rarity of this pathology and the lack of randomized controlled studies, it is difficult to determine the optimal treatment according to the principles of evidence-based medicine. An appropriate approach for this condition appears to be the combination of guidelines developed in Amyand’s therapy according to Losanoff and Basson, along with the recommended “gold standard” therapy for Fournier’s gangrene. This means early and highly radical surgical debridement, adequate antibiotic therapy and intensive care.

An Epicardial Mesothelial Cyst Attached to the Ascending Aorta

2015 ◽  
Vol 18 (5) ◽  
pp. 194
Author(s):  
Yoshihito Suenaga ◽  
Tomonobu Abe ◽  
Masato Mutsuga ◽  
Yoshimori Araki ◽  
Akihiko Usu
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Surgery ◽  
Bypass Surgery ◽  
Artery Bypass ◽  
Mesothelial Cell ◽  
Rare Condition ◽  
Ascending Aorta ◽  
Mesothelial Cyst ◽  
Great Vessels ◽  
Insight Into

An epicardial mesothelial cyst, which can be defined as a mesothelial cyst attached to the epicardium surrounding the heart and the great vessels inside the pericardial sac, is a rare condition. We herein report a case of epicardial cyst, which was attached to the ascending aorta. The patient was a 76-year-old male who underwent coronary artery bypass surgery, and the cyst was found incidentally. It was approximately 5 cm in diameter, and histological examination confirmed mesothelial cell origin. The ascending aorta has not previously been reported as the origin of an epicardial mesothelial cyst. This case gives new insight into the embryology of these cysts

Autoimmune Pancreatitis – Diagnosis, Management and Longterm Follow-up

2014 ◽  
Vol 23 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Suvadip Chatterjee ◽  
Kofi W. Oppong ◽  
John S. Scott ◽  
Dave E. Jones ◽  
Richard M. Charnley ◽  
...  
Keyword(s):  
Autoimmune Pancreatitis ◽  
Rare Condition ◽  
Team Approach ◽  
Diagnostic Challenge ◽  
Multisystem Disorder ◽  
North East ◽  
The North ◽  
Work Up ◽  
Igg4 Level

Background & Aims: Autoimmune pancreatitis (AIP) is a fibroinflammatory condition affecting the pancreas and could present as a multisystem disorder. Diagnosis and management can pose a diagnostic challenge in certain groups of patients. We report our experience of managing this condition in a tertiary pancreaticobiliary centre in the North East of England.Methods: Patients were identified from a prospectively maintained database of patients diagnosed with AIP between 2005 and 2013. Diagnosis of definite/probable AIP was based on the revised HISORt criteria. When indicated, patients were treated with steroids and relapses were treated with azathioprine. All patients have been followed up to date.Results: Twenty-two patients were diagnosed with AIP during this period. All patients had pancreatic protocol CT performed while some patients had either MR or EUS as part of the work up. Fourteen out of 22 (64%) had an elevated IgG4 level (mean: 10.9 g/L; range 3.4 - 31 g/L). Four (18%) patients underwent surgery. Extrapancreatic involvement was seen in 15 (68%) patients, with biliary involvement being the commonest. Nineteen (86%) were treated with steroids and five (23%) required further immunosuppression for treatment of relapses. The mean follow up period was 36.94 months (range 7 - 94).Conclusion: Autoimmune pancreatitis is being increasingly recognized in the British population. Extrapancreatic involvement, particularly extrahepatic biliary involvement seems to be a frequent feature.Diagnosis should be based on accepted criteria as this significantly reduces the chances of overlooking malignancy. Awareness of this relatively rare condition and a multi-disciplinary team approach will help us to diagnose and treat this condition more efiectively thereby reducing unnecessary interventions.

A New Species of Eugenia subg. Pseudeugenia (Myrtaceae, Myrteae) from Brazilian Atlantic Forest

2020 ◽  
Vol 45 (3) ◽  
pp. 537-543
Author(s):  
Karinne Sampaio Valdemarin ◽  
Jair Eustáquio Quintino Faria ◽  
Fiorella Fernanda Mazine ◽  
Vinicius Castro Souza
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Conservation Status ◽  
Forest Vegetation ◽  
Vegetation Types ◽  
Flower Buds ◽  
Diagnostic Features ◽  
Closely Related Species ◽  
Lowland Forests ◽  
A New Species

Abstract—A new species of Eugenia from the Atlantic forest of Brazil is described and illustrated. Eugenia flavicarpa is restricted to the Floresta de Tabuleiro (lowland forests) of Espírito Santo state and is nested in Eugenia subg. Pseudeugenia. Considering all other species of the subgenus that occur in forest vegetation types of the Atlantic forest phytogeographic domain, Eugenia flavicarpa can be distinguished mainly by the combination of smooth leaves with indumentum on both surfaces, with two marginal veins, usually ramiflorous inflorescences, pedicels 4.5‐9.7 mm long, flower buds 3.5‐4 mm in diameter, and by the calyx lobes that are 2‐3 mm long with rounded to obtuse apices. Morphological analyses were performed to explore the significance of quantitative diagnostic features between the new species and the closely related species, Eugenia farneyi. Notes on the habitat, distribution, phenology, and conservation status of Eugenia flavicarpa are provided, as well as a key for all species of Eugenia subg. Pseudeugenia from forest vegetation of the Atlantic forest phytogeographic domain.

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