Ultrastructural investigation on the alga-fungus relation in pyrenocarpous lichen species

PROTOPLASMA ◽  
1973 ◽  
Vol 78 (1-2) ◽  
pp. 187-193 ◽  
Author(s):  
Margalith Galun ◽  
Esther Kushnir ◽  
Leah Behr ◽  
Yehuda Ben-Shaul
Keyword(s):  
Lichen Species ◽  
Ultrastructural Investigation

Ultrastructural Investigation of Spontaneous Pituitary Adenomas in Aging Sprague-Dawley Rats

1982 ◽  
Vol 40 ◽  
pp. 216-217
Author(s):  
D. J. McComb ◽  
J. Beri ◽  
F. Zak ◽  
K. Kovacs
Keyword(s):  
Microscopic Study ◽  
Pituitary Adenomas ◽  
Wistar Rats ◽  
Microscopic Level ◽  
Sprague Dawley ◽  
Prolactin Cells ◽  
Light Microscopic Level ◽  
Ultrastructural Investigation ◽  
Sprague Dawley Rats ◽  
Long Evans

Investigation of the spontaneous pituitary adenomas in rat have been limited mainly to light microscopic study. Furth et al. (1973) described them as chromophobic, secreting prolactin. Kovacs et al. (1977) in an ul trastructural investigation of adenomas of old female Long-Evans rats, found that they were composed of prolactin cells. Berkvens et al. (1980) using immunocytochemistry at the light microscopic level, demonstrated that some spontaneous tumors of old Wistar rats could contain GH, TSH or ACTH as well as PRL.

Silica Incorporation in the Cell Wall of the Singing Cell of Urtica dioica

1975 ◽  
Vol 33 ◽  
pp. 584-585
Author(s):  
A. E. Sowers ◽  
E. L. Thurston
Keyword(s):  
Cell Wall ◽  
Unique Feature ◽  
Urtica Dioica ◽  
Wall Material ◽  
Pain Response ◽  
Apical Portion ◽  
Ultrastructural Investigation ◽  
Plant Families ◽  
Bulbous Tip

Plant stinging emergences exhibit functional similarities in that they all elicit a pain response upon contact. A stinging emergence consists of an elongated stinging cell and a multicellular pedestal (Fig. 1). A recent ultrastructural investigation of these structures has revealed the ontogeny and morphology of the stinging cells differs in representative genera in the four plant families which possess such structures. A unique feature of the stinging cell of Urtica dioica is the presence of a siliceous cell wall in the apical portion of the cell. This rigid region of the cell wall is responsible for producing the needle-like apparatus which penetrates the skin. The stinging cell differentiates the apical bulbous tip early in development and the cell continues growth by intercalary addition of non-silicified wall material until maturity.The uppermost region of the stinging cell wall is entirely composed of silica (Fig. 2, 3) and upon etching with a 3% solution of HF (5 seconds), the silica is partially removed revealing the wall consisting of individualized silica bodies (Fig. 4, 5).

Reduction of paw edema and liver oxidative stress in carrageenan-induced acute inflammation by Lobaria pulmonaria and Parmelia caperata, lichen species, in mice

2019 ◽  
pp. 1-9
Author(s):  
Samira Salem ◽  
Essaid Leghouchi ◽  
Rachid Soulimani ◽  
Jaouad Bouayed
Keyword(s):  
Time Course ◽  
Acute Inflammation ◽  
Lichen Species ◽  
Paw Edema ◽  
Sod Activity ◽  
Edema Formation ◽  
Lobaria Pulmonaria ◽  
Anti Inflammatory ◽  
Endogenous Antioxidant ◽  
Inflammatory Effect

Abstract. Paw edema volume reduction is a useful marker in determining the anti-inflammatory effect of drugs and plant extracts in carrageenan-induced acute inflammation. In this study, the anti-inflammatory effect of Lobaria pulmonaria (LP) and Parmelia caperata (PC), two lichen species, was examined in carrageenan-induced mouse paw edema test. Compared to the controls in carrageenan-induced inflammation (n = 5/group), our results showed that pretreatment by single oral doses with PC extract (50–500 mg/kg) gives better results than LP extract (50–500 mg/kg) in terms of anti-edematous activity, as after 4 h of carrageenan subplantar injection, paw edema formation was inhibited at 82–99% by PC while at 35–49% by LP. The higher anti-inflammatory effect of PC, at all doses, was also observed on the time-course of carrageenan-induced paw edema, displaying profile closely similar to that obtained with diclofenac (25 mg/kg), an anti-inflammatory drug reference (all p < 0.001). Both LP and PC, at all doses, significantly ameliorated liver catalase (CAT) activity (all p < 0.05). However, superoxide dismutase (SOD) activity, glutathione peroxidase (GPx) activity and glutathione (GSH) levels were found increased in liver of PC- compared to LP-carrageenan-injected mice. Our findings demonstrated on one hand higher preventive effects of PC compared to LP in a mouse carrageenan-induced inflammatory model and suggested, on the other hand, that anti-inflammatory effects elicited by the two lichens were closely associated with the amelioration in the endogenous antioxidant status of liver.

Carotenoids in several lichen species from Yunnan, China

2000 ◽  
Vol 111 (1-2) ◽  
pp. 23-28 ◽  
Author(s):  
B. Czeczuga ◽  
Li-Song Wang ◽  
E. Czeczuga-Semeniuk
Keyword(s):  
Lichen Species

Veränderungen der epiphytischen Flechtenflora im Stadtgebiet von Rostock zwischen 1994/1995 und 2017/2018

2020 ◽  
Vol 57 ◽  
pp. 3-34
Author(s):  
Ulf Schiefelbein ◽  
Frieda Engel ◽  
Franziska Masberg ◽  
Svea Lübke ◽  
Johann Schiefelbein ◽  
...  
Keyword(s):  
Urban Area ◽  
Lichen Species ◽  
Population Increase ◽  
City Centre ◽  
Acer Pseudoplatanus ◽  
Residential Areas ◽  
Epiphytic Lichen ◽  
Green Areas ◽  
Xanthoria Parietina ◽  
Lichen Flora

Die Flechtendiversität und -quantität wurde in den Jahren 2017/2018 in Rostock an 53 Bäumen erfasst. Die Ergebnisse wurden mit den Ergebnissen einer Kartierung von 1994/1995 verglichen. Ferner wurden die Feuchtigkeitsverhältnisse und der Grad der Eutrophierung bzw. die Luftqualität an den Bäumen der Gattungen Tilia und Acer anhand des bekannten Verhaltens der nachgewiesenen Flechten bezüglich Luftfeuchtigkeit/Niederschlägen, Eutrophierung und pH-Verhältnissen bewertet. 2017/2018 wurden 79 Flechtenarten und 14 lichenicole Pilzarten nachgewiesen. Die Gesamtzahl der im Untersuchungsgebiet nachgewiesenen epiphytischen Flechtenarten erhöhte sich damit auf 80. Die meisten Flechtenarten kommen an Tilia spec. (60), Acer pseudoplatanus (43) und A. platanoides (34) vor. Die häufigsten Arten sind Phaeophyscia orbicularis, Physcia adscendens, Ph. tenella und Xanthoria parietina. Candelariella xanthostigmoides, Flavoparmelia soredians, Hyperphyscia adglutinata, Intralichen lichenum, Lecanora subcarpinea, Parmelia serrana, Parmelina quercina und Taeniolella delicata sind Neufunde für Mecklenburg-Vorpommern. Hinsichtlich der Verbreitung und des Charakters der Fundorte können die nachgewiesenen Flechten und lichenicolen Pilze drei Gruppen zugeordnet werden: 1. Arten, die auch an stark befahrenen Straßen oder in eng bebauten Wohngebieten mit wenig Grünflächen und in den Stadtgebieten Kröpeliner Tor-Vorstadt oder Stadtmitte vorkamen, 2. Arten, die auch noch in locker bebauten, grünreichen Wohngebieten und in kleineren Grünlagen der Neubaugebiete vorkamen, aber nicht mehr in der Kröpeliner Tor-Vorstadt und Stadtmitte nachgewiesen wurden, 3. Arten, die nur an Bäumen vorkamen, die sich in der Nähe zum Offenland befinden. Der ersten Gruppe wurden 22, der zweiten Gruppe 32 und der dritten Gruppe 25 Flechtenarten zugeordnet. Dem Verhältnis zwischen der Frequenzsumme der stark nitrophytischen Arten und der Frequenzsumme der a-, schwach und mäßig nitrophytischen Arten auf den Bäumen entsprechend, wird die Luftqualität an 15 Bäumen der Gattungen Acer und Tilia für gut, an 14 Bäumen für mäßig und an 13 Bäumen für schlecht befunden. Auf der Grundlage des Verhältnisses zwischen der Anzahl basiphytischer Arten und der Summe an Arten an sauren oder/und subneutralen Borken wurden sechs Standorte als wenig, 21 Standorte als mäßig und 15 Standorte als stark schadstoffbelastet eingestuft. Meso- bis hygrophytische Flechten kamen an zehn Standorten mit nur ein oder zwei Arten, an 21 Standorten mit drei bis fünf Arten und an elf Standorten mit mehr als fünf Arten vor. Die epiphytische Flechtenflora hat sich in Rostock seit 1995 gravierend verändert. Es nahmen 69 Flechten im Bestand zu, von denen sich 52 Arten erst nach 1995 angesiedelt haben. Bei 32 Flechten ist eine schwache, bei 19 Flechten eine mäßige und bei 18 Flechten eine starke Zunahme zu verzeichnen. Lecanora conizaeoides kam 2017/2018 nicht mehr vor, vier Arten haben im Bestand abgenommen. Changes in the epiphytic lichen flora in the urban area of Rostock between 1994/1995 and 2017/2018 In 2017/2018, diversity and quantity of lichens were studied on 53 trees in Rostock city. The results were compared with the results of a mapping project in 1994/1995. Humidity conditions and degree of eutrophication at trees of the genera Tilia and Acer were interpreted with reference to the known indicator characteristcs of the lichen species concerning air humidity/precipitation, eutrophication and pH conditions. In 2017/2018, 79 lichen species and 14 lichenicolous fungus species were found. The total number of lichens increased to 80 species. Most species were found on Tilia spec. (60), Acer pseudoplatanus (43) and A. platanoides (34). The most common species are Phaeophyscia orbicularis, Physcia adscendens, Ph. tenella and Xanthoria parietina. Candelariella xanthostigmoides, Flavoparmelia soredians, Hyperphyscia adglutinata, Intralichen lichenum, Lecanora subcarpinea, Parmelia serrana, Parmelina quercina and Taeniolella delicata are new to Mecklenburg-Western Pomerania. The distribution and characteristics of the collection sites allow for deviding the species into three groups: 1. species also present along streets with heavy traffic or in densely populated residential areas with a lack of green areas and in the districts Kröpeliner Tor-Vorstadt or City Centre, 2. species still present in sparse residential areas and smaller green areas but not in the districts Kröpeliner Tor-Vorstadt or City Centre, 3. species only colonizing trees close to the open landscape. Twenty-two species were assigned to the first, 32 species to the second and 25 species to the latter group. According to the proportion between the sum of frequencies of the strongly nitrophytic lichens and the sum of frequencies of the anitrophytic and moderately nitrophytic lichens on trees, air quality was indicated to be good at 15 trees of the genera Acer and Tilia, moderate at 14 trees and bad at 13 trees. Based on the proportion between the number of basiphytic lichen species and the sum of species colonizing acidophytic and subneutrophytic bark, six locations were categorized as little, 21 locations as moderately and 15 locations as strongly polluted. Mesophytic or hygrophytic lichens were present with only one or two species at ten locations, three to five species at 21 locations and over five species at 11 locations. Within the period under consideration, the epiphytic lichen flora of the Rostock urban area changed considerably. The populations of 69 lichen species increased, with 52 lichens newly establishing after 1995. In 32 lichen species a slight, in 19 species a moderate, and in 18 species a strong population increase was recorded. Lecanora conizaeoides disappeared and the populations of four species decreased.

Sedelnikovaea baicalensis (Lecanoraceae) — new lichen genus and species for Europe

2018 ◽  
Vol 52 (2) ◽  
pp. 407-416
Author(s):  
T. V. Makryi
Keyword(s):  
Central Asia ◽  
Lichen Species ◽  
Significant Part ◽  
The Urals ◽  
Southern Siberia ◽  
Central Asian ◽  
Northeastern Siberia ◽  
Mountain Belts ◽  
First Time ◽  
Vast Range

Sedelnikovaea baicalensis, the Siberian-Central Asian lichen species, is recorded for the first time for Europe. Based on all the known localities, including those first-time reported from Baikal Siberia, the peculiarities of the ecology and distribution of this species are discussed, the map of its distribution is provided. It is concluded that the species was erroneously considered earlier as a Central Asian endemic. The center of the present range of this lichen is the steppes of Southern Siberia and Mongolia. Assumptions are made that S. baicalensis is relatively young (Paleogene-Neogene) species otherwise it would have a vast range extending beyond Asia, and also that the Yakut locations of this species indicate that in the Pleistocene its range was wider and covered a significant part of the Northeastern Siberia but later underwent regression. Based on the fact that in the mountains of Central Asia the species is found only in the upper mountain belts, it is proposed to characterize it as «cryo-arid xerophyte» in contrast to «arid xerophytes». A conclusion is made that the presence of extensive disjunctions of S. baicalensis range between the Southern Pre-Urals and the Altai-Sayan Mountains or the Mountains of Central Asia is unlikely; the lichen is most likely to occur in the Urals and most of Kazakhstan.

Materials to the lichen flora of the Bauntovsky District, Republic of Buryatia

2020 ◽  
Vol 54 (1) ◽  
pp. 149-164
Author(s):  
T. M. Kharpukhaeva ◽  
A. V. Lishtva
Keyword(s):  
Mountain Lakes ◽  
Lichen Species ◽  
East Siberia ◽  
Alectoria Sarmentosa ◽  
The Republic ◽  
Interesting Species ◽  
Lichen Flora

The paper presents data on 248 lichen species from the Bauntovsky District of the Republic of Buryatia, of them 233 are new to the district. Alectoria sarmentosa subsp. vexillifera new to East Siberia, and 6 species new to the Republic of Buryatia — Arthonia didyma, Aspicilia aquatica, Immersaria athroocarpa, Ionaspis lacustris, Ramboldia elabens, and Parmelia asiatica. Very interesting species is an aquatic lichen Collema ramenskii recorded in mountain lakes.

Contributions to the lichen flora of the Novaya Zemlya Archipelago (Archangelsk Region, Russian Arctic)

2020 ◽  
Vol 54 (1) ◽  
pp. 117-126
Author(s):  
I. S. Zhdanov
Keyword(s):  
Lichen Species ◽  
Russian Arctic ◽  
Novaya Zemlya Archipelago ◽  
Ecological Preferences ◽  
Novaya Zemlya ◽  
Annotated List ◽  
History Of ◽  
Lichen Flora

The annotated list of 20 lichen species, based on the author’s collection, is presented. Atla wheldonii is new for Russia, and 16 species are new for Novaya Zemlya Archipelago. Morphology and ecological preferences of the lichen species new for the archipelago are discussed. The history of lichenological investigations in Novaya Zemlya is described.

New and interesting lichen records for Republic of Sakha (Yakutia). III

2017 ◽  
Vol 51 ◽  
pp. 220-231 ◽  
Author(s):  
S. V. Chesnokov ◽  
L. A. Konoreva ◽  
L. N. Poryadina ◽  
A. G. Paukov ◽  
E. S. Kusnetsova ◽  
...  
Keyword(s):  
Lichen Species ◽  
Eastern Siberia ◽  
First Time

Lichen specimens collected in 2008, 2015 and 2016 in Central (Olekminsky district), Eastern (Oimyakon district) and Southern (Aldan, Neryungri districts) Yakutia were studied. As a result 16 lichen species are recorded for Yakutia for the first time, among them 8 species are new to Eastern Siberia and one species — Ramonia himelbrantii — new to Asia. At present the list of lichens of Yakutia numbers about 820 species.

To the lichen flora of Oka Plateau (Eastern Sayan, Republic of Buryatia)

2009 ◽  
Vol 43 ◽  
pp. 229-245 ◽  
Author(s):  
I. N. Urbanavichene ◽  
G. P. Urbanavichus
Keyword(s):  
Lichen Species ◽  
Southern Siberia ◽  
Eastern Sayan ◽  
First Time ◽  
Lichen Flora

New data on the distribution of 329 lichen species in Oka Plateau (Eastern Sayan, Southern Siberia, Republic of Buryatia) are presented. 7 species are reported for the first time for lichen flora of Russia: Leptogium furfuraceum, Melanelixia villosella, Myxophora leptogiophila, Pachyphiale ophiospora, Physcia cf. integrata, Polycoccum clauzadei, Stigmidium psorae. 14 species are recorded for the first time to Southern Siberia: Arthonia clemens, Bacidina delicata, Caloplaca saxifragarum, Lecidea septentrionalis, Leciophysma finmarkicum, Leptogium intermedium, Phaeosporobolus alpinus, Rhizocarpon frigidum, Rinodina metaboliza, R. olivaceobrunnea, Tetramelas chloroleucus, T. phaeophysciae, Weddellomyces tartaricola, Xanthoria stiligera. The records of Myxophora leptogiophila, Pachyphiale ophiospora, Polycoccum clauzadei, Stigmidium psorae, Weddellomyces tartaricola are the first to Asia.

Sign in / Sign up

Export Citation Format

Share Document