Synthesized ectomycorrhizae of aspen: fungal genus level of structural characterization

1985 ◽  
Vol 63 (2) ◽  
pp. 252-262 ◽  
Author(s):  
C. Godbout ◽  
J. A. Fortin
Keyword(s):  
Host Plant ◽  
Ectomycorrhizal Fungi ◽  
Populus Tremuloides ◽  
Structural Characterization ◽  
Mycorrhizal Fungi ◽  
Morphological Characteristics ◽  
Fungal Symbiont ◽  
Structural Types ◽  
Fungal Genus

The ability of Populus tremuloides Michx. to form ectomycorrhizae with identified species of fungi was investigated using a pouch technique. Twenty-nine out of 54 fungus species formed ectomycorrhizae on aspen seedlings. Aspen seems to display little specificity for ectomycorrhizal fungi. Only epidermal Hartig nets were observed in the synthesized ectomycorrhizae and periepidermal ones were frequently encountered. Structural and morphological characteristics of ectomycorrhizae are presented by genus of mycorrhizal fungi. This grouping of characters by genus seems possible independently of the host plant. The classification of ectomycorrhizae is viewed in a new way in which structural types would be taxonomically related to the genus of the fungal symbiont.

Ectomycorrhizal fungi associated with aspen on three sites in the north-central Rocky Mountains

1993 ◽  
Vol 71 (11) ◽  
pp. 1414-1420 ◽  
Author(s):  
Cathy Cripps ◽  
O. K. Miller Jr.
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Populus Tremuloides ◽  
Rocky Mountains ◽  
Mycorrhizal Fungi ◽  
Climatic Conditions ◽  
Southwestern Montana ◽  
The North ◽  
Dominant Component ◽  
Drainage Patterns ◽  
Central Rocky Mountains

Sporocarps of ectomycorrhizal fungi were collected over three field seasons in aspen (Populus tremuloides) stands in the Rocky Mountains, 1800–2000 m above sea level. The two sites in southwestern Montana and one site in southeastern Idaho vary in size, age of trees, type of soil, drainage patterns, and to a certain extent, climatic conditions. In all, 43 species of ectomycorrhizal fungi were found associated with aspen. The Cortinariaceae were a dominant component of the mycoflora, including at least seven species of Inocybe. Fourteen species of ectomycorrhizal fungi, including Leccinum aurantiacum, occurred on all three sites in association with aspen, and the dominant or characteristic mycorrhizal species varied among sites. The early colonizers Inocybe lacera and Laccaria laccata, which were previously reported on acidic soil, were characteristic of the smelter-acidified, nutrient-poor soil of the site near Butte, Montana. Late stage fungi such as Amanita muscaria and Lactarius controversus were more prevalent in the older, undisturbed aspen stands. Key words: aspen, ectomycorrhizal fungi, mycorrhizal fungi, Populus tremuloides.

RHYNCHOLITES AND THE PROBLEM OF NARROW AND BROAD CONCEPTION OF TAXONS

2018 ◽  
pp. 12-17 ◽  
Author(s):  
I. R. Khuzina ◽  
V. N. Komarov
Keyword(s):  
Sexual Dimorphism ◽  
Morphological Characteristics ◽  
Mass Scale ◽  
Individual Variability ◽  
Point Of View ◽  
The Other ◽  
New Taxon ◽  
Artificial System ◽  
Broad Understanding

The paper considers a point of view, based on the conception of the broad understanding of taxons. According to this point of view, rhyncholites of the subgenus Dentatobeccus and Microbeccus are accepted to be synonymous with the genus Rhynchoteuthis, and subgenus Romanovichella is considered to be synonymous with the genus Palaeoteuthis. The criteria, exercising influence on the different approaches to the classification of rhyncholites, have been analyzed (such as age and individual variability, sexual dimorphism, pathological and teratological features, degree of disintegration of material), underestimation of which can lead to inaccuracy. Divestment of the subgenuses Dentatobeccus, Microbeccus and Romanovichella, possessing very bright morphological characteristics, to have an independent status and denomination to their synonyms, has been noted to be unjustified. An artificial system (any suggested variant) with all its minuses is a single probable system for rhyncholites. The main criteria, minimizing its negative sides and proving the separation of the new taxon, is an available mass-scale material. The narrow understanding of the genus, used in sensible limits, has been underlined to simplify the problem of the passing the view about the genus to the other investigators and recognition of rhyncholites for the practical tasks.

scholarly journals Morphological Characteristics, Classifications and Difficulties in the Use of Diagnostic Criteria for Serrated Lesions of the Large Intestine

2021 ◽  
Author(s):  
Cesar de Souza Bastos Junior ◽  
Vera Lucia Nunes Pannain ◽  
Adriana Caroli-Bottino
Keyword(s):  
Diagnostic Criteria ◽  
Morphological Characteristics ◽  
World Health ◽  
Diagnostic Tools ◽  
Serrated Adenoma ◽  
The Past ◽  
The World ◽  
Serrated Lesions ◽  
Health Organization

Abstract Introduction Colorectal carcinoma (CRC) is the most common gastrointestinal neoplasm in the world, accounting for 15% of cancer-related deaths. This condition is related to different molecular pathways, among them the recently described serrated pathway, whose characteristic entities, serrated lesions, have undergone important changes in their names and diagnostic criteria in the past thirty years. The multiplicity of denominations and criteria over the last years may be responsible for the low interobserver concordance (IOC) described in the literature. Objectives The present study aims to describe the evolution in classification of serrated lesions, based on the last three publications of the World Health Organization (WHO) and the reproducibility of these criteria by pathologists, based on the evaluation of the IOC. Methods A search was conducted in the PubMed, ResearchGate and Portal Capes databases, with the following terms: sessile serrated lesion; serrated lesions; serrated adenoma; interobserver concordance; and reproducibility. Articles published since 1990 were researched. Results and Discussion The classification of serrated lesions in the past thirty years showed different denominations and diagnostic criteria. The reproducibility and IOC of these criteria in the literature, based on the kappa coefficient, varied in most studies, from very poor to moderate. Conclusions Interobserver concordance and the reproducibility of microscopic criteria may represent a limitation for the diagnosis and appropriate management of these lesions. It is necessary to investigate diagnostic tools to improve the performance of the pathologist's evaluation, for better concordance, and, consequently, adequate diagnosis and treatment.

The composition, generic placement and host-plant relationships of the joviana-group in the Parallelia generic complex (Lepidoptera : Noctuidae, Catocalinae)

2003 ◽  
Vol 17 (1) ◽  
pp. 111 ◽  
Author(s):  
Jeremy D. Holloway ◽  
Scott E. Miller
Keyword(s):  
New Species ◽  
Host Plant ◽  
Significant Preference ◽  
Larval Host ◽  
Two New Species ◽  
Lepidoptera Noctuidae ◽  
Generic System ◽  
Host Plant Relationships

The biosystematic position of the Parallelia generic complex is reviewed and a revised generic classification of its component taxa is presented. Bastilla Swinhoe (= Xiana Nye, syn. nov., Naxia Guenée, syn. nov.) is identified as the most appropriate genus for a large number of these taxa, including the joviana-group, which is reviewed in detail, with description of two new species, B. nielseni, sp. nov. and B. binatang, sp. nov. Parallelia prouti Hulstaert, syn. nov. and P. cuneifascia Hulstaert, syn. nov. are recognised as junior synonyms of Bastilla vitiensis Butler and two newly described Tahitian taxa are transferred into the joviana-group. Larval host records are examined in relation to this new generic system and significant preference for the Euphorbiaceae is noted for several groups: Bastilla, Buzara Walker (= Caranilla Moore, syn. nov., another segregate from Parallelia) and an Australian group within Grammodes Guenée.

Evaluation of commercial composts and potting mixes and their ability to support arbuscular mycorrhizal fungi with maize (Zea mays) as host plant

2021 ◽  
Vol 134 ◽  
pp. 187-196
Author(s):  
M.J. Salomon ◽  
S.J. Watts-Williams ◽  
M.J. McLaughlin ◽  
C.J. Brien ◽  
N. Jewell ◽  
...  
Keyword(s):  
Zea Mays ◽  
Arbuscular Mycorrhizal Fungi ◽  
Host Plant ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal

Prosopanche cocuccii (Hydnoraceae): a new species from Southern Brazil

Phytotaxa ◽  
2021 ◽  
Vol 521 (3) ◽  
pp. 177-192
Author(s):  
JORDANO D. TAVARES DE CARVALHO ◽  
CATARINE MARKUS ◽  
ALDO MEROTTO JUNIOR ◽  
RENATO A. ZÁCHIA ◽  
MARILIA SCHUCH ◽  
...  
Keyword(s):  
New Species ◽  
Nicotiana Tabacum ◽  
Host Plant ◽  
Morphological Characteristics ◽  
Southern Brazil ◽  
Habitat Ecology ◽  
Single Host ◽  
Flower Organs ◽  
General Size ◽  
A New Species

Prosopanche cocuccii is described as a new species from Southern Brazil. It resembles P. bonacinae due to the trigonous rhizome and by the general size of the flower organs. Nevertheless, P. cocuccii is distinguished by the main floral morphological characteristics used to differentiate species. In addition, the new species presents some rare characters for the genus, such as a highly branched rhizome and flowers usually grouped in fascicles. We provide a description, illustrations, field photographs, morphological details under the stereomicroscope, and comments on habitat, ecology, distribution, and conservation of the new species, as well as an updated key for the genus Prosopanche. In addition, we identified that P. cocuccii produces a large number of rhizomes and fruits for each single host specimen of tobacco (Nicotiana tabacum), which resulted in a decrease in height and growth of its only known host plant.

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