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1.
Five new species of the genus Endotricha Zeller are described from China: Endotricha dentiprocessasp. n., Endotricha unicolorsp. n., Endotricha shafferisp. n., Endotricha convexasp. n. and Endotricha whalleyisp. n. Females of three species are described for the first time: Endotricha hoenei Whalley, 1963, Endotricha luteogrisalis Hampson, 1896 and Endotricha simipunicea Wang & Li, 2005. Photographs of the adults and both male and female genitalia are provided. 相似文献
2.
Five new species of the amphipod genus Bogidiella are described from fresh groundwaters in Spain. No freshwater Bogidiellidae were known previously from the Iberian peninsula.Groundwater crustaceans of Spain, 3.Groundwater crustaceans of Spain, 3. 相似文献
3.
Laure Apothéloz-Perret-Gentil Maria Holzmann Jan Pawlowski 《European journal of protistology》2013,49(2):210-216
A new monothalamous (single-chambered) soft-walled foraminiferal species, Arnoldiellina fluorescens gen. et sp. nov., was isolated from samples collected in the Gulf of Eilat, Israel. The species is characterized by a small elongate organic theca with a single aperture of allogromiids. It is characterized by the emission of green autofluorescence (GAF) that has so far not been reported from foraminifera. Phylogenetic analysis of a fragment of the 18S rDNA indicates that the species is related to a group of monothalamous foraminiferans classified as clade I. Although the morphology of the new species is very different compared to the other members of this clade, a specific helix in 18S rRNA secondary structure strongly supports this position. 相似文献
4.
A procedure to produce fruits from cultured shoot tips of Cucumis sativus L. cultivar Marketmore-76 in vitro is described. Four-week-old shoot tips, derived from sterile germinated seedlings on a MS medium, were cultured in a 3.8-1 Mason jar using an automated plant culture system. Tips readily generated roots, leaves and flowers after another 4 to 8 weeks in culture. Administration of compressed air at a 300 ml/min flow rate for 30 min 10 or 15 times a day induced the development of parthenocarpic fruits from flowers. Fruits, up to 170 mm long by 35 mm diameter, were obtained within 30 to 45 d after flower opening.Abbreviations APCS
automated plant culture system
- BA
N-(phenylmethyl)-1H-purin-6-amine
- BM
basal medium
- cv
cultivar
- MS
Murashige and Skoog
- NAA
1-naphthaleneacetic acid 相似文献
5.
G. N. Rudenskaya E. A. Bogdanova L. P. Revina B. N. Golovkin V. M. Stepanov 《Planta》1995,196(1):174-179
A serine proteinase was isolated from fruits of Maclura pomifera (Raf.) Schneid. by affinity chromatography on bacitracin-containing sorbents and gel-filtration. The enzyme, named macluralisin, is a glycoprotein with a molecular mass of 65 kDa; its protein moiety corresponds to a molecular mass of 50 kDa. The substrate specificity of macluralisin towards synthetic peptides and insulin B-chain is similar to that of cucumisin, a subtilisin-like proteinase from melon fruit. The enzyme is completely inhibited by diisopropylfluorophosphate. Its amino-acid composition resembles that of a serine proteinase isolated from the Cucurbitaceae. The N-terminal sequence has 33% of its residues identical to those of the sequence of fungal subtilisin-like proteinase K. Hence, Maclura pomifera serine proteinase belongs to the subtilisin family, which seems to be broadly distributed in the plant kingdom.Abbreviations DFP
diisopropylfluorophosphate
- PMSF
phenylmethylsulfonylfluoride
- Glp
pyroglutamyl
- NHC6H4NO2
p-nitroanilide
This work was supported in part by a grant from the Russian Foundation for Basic Research. 相似文献
6.
7.
Jalila Amorri Gritta Veit-Köhler Jan Drewes Patricia Aïssa 《Helgoland Marine Research》2010,64(3):191-203
Several specimens belonging to a new species of Apodopsyllus were collected during a study on the diversity of meiobenthic communities in the Gulf of Gabès, a Mediterranean shallow-water
bay at the south-eastern coast of Tunisia in July 2005. The new species Apodopsyllus gabesensis n. sp. shares the characteristics of the genus such as the lack of endopods from P2 to P4 and the soft and slightly cuticularized
body. Apodopsyllus gabesensis n. sp. belongs to the few known species of Apodopsyllus that are described to have comparably distinct patterns of dorsal and lateral cuticular plates and pores. Besides a typical
combination of characters that clearly distinguishes the new species from its congeners, the new species shows the following
unique single characters: female P5 with a hitherto unknown combination of shape of the exopodal part and shape and setation
of the baseoendopodal lobe with two small stout spines; male P6 with a particular shape, and a distinct armature of the exopodal
spines in P2–P4 in the male that are pinnate with very short spinules contrary to the female where spines are smooth. The
genus Apodopsyllus contains 26 species with the inclusion of the new species. 相似文献
8.
Chi G. Fru Louis P. Sandjo Victor Kuete Johannes C. Liermann Dieter Schollmeyer Samuel O. Yeboah Renameditswe Mapitse Berhanu M. Abegaz Bonaventure T. Ngadjui Till Opatz 《Phytochemistry letters》2013,6(4):676-680
Phytochemical studies of the wood and the stem bark of Tridesmostemon omphalocarpoides Engl. (Sapotaceae) led to the isolation of omphalocarpoidone (1), a new lanostane-type furano-spiro-γ-lactone together with β-amyrin acetate (2), taraxerol (3), spinasterol (4), lichexanthone (5), epi-catechin (6), spinasterol 3-O-β-d-glucopyranoside (7), tormentic acid (8), and 1,2,3,4-tetrahydronorharman-1-one (9). Their structures were established on the basis of extensive NMR studies, mass spectrometry, and by comparison of the data with those previously reported in the literature. The structure of the new secondary metabolite was later confirmed by X-ray crystallography. Except for spinasterol, the antimicrobial activities of these secondary metabolites were investigated on ten bacterial strains and the alkaloid 9 showed a significant activity against Escherichia coli with a MIC at 16 μg/mL. 相似文献
9.
Karnyothrips cyathomorphus
sp. n. (Phlaeothripidae: Phlaeothripinae) is described as a new apterous species in the genus Karnyothrips Watson 1923, and it represents the fourth species of the genus to be recorded from China. A key to the Chinese species is given. 相似文献
10.
Purification and Characterization of Two Major Lectins from Araucaria brasiliensis syn. Araucaria angustifolia Seeds (Pinhão)
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Two major lectins (lectin I and lectin II) were purified to homogeneity from the seeds of Araucaria brasiliensis (Gymnospermae). The purity of the lectins was confirmed by polyacrylamide gel electrophoresis, isoelectric focusing, and high performance liquid chromatography. They are glycoproteins in nature containing 6.3 and 2.9%, respectively, of neutral sugar and have absorption coefficients of 3.8 and 4.7, respectively, at 280 nanometers. The molecular weights of both lectins obtained by gel filtration on Sephacryl S-400 were equal: 200,000. After dissociation by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, molecular weights were 20,000 and 34,000, respectively, for lectin I and lectin II, suggesting they are decameric and hexameric in nature. The amino acid composition of both lectins showed little difference, but both had high amounts of acidic amino acids and lacked methionine in their molecule. The carbohydrate binding specificity of lectins was directed towards mannose, glucose, and their oligomers. High inhibitory activity was also found with thyroglobulin. The erythroagglutinating activity of the lectins was enhanced in the presence of high-molecular-weight substances both at 37 and 4°C. Divalent cations do not appear to be essential for activity. They maintained their agglutinating activity over a broad but different range of pH: 5.5 to 7.5 and 6.5 to 7.5, respectively. Both lectins agglutinated erythrocytes of human ABO blood types equally well. 相似文献
11.
Konstantin E. Pustovoytov Simone Riehl Siegfried Mittmann 《Vegetation History and Archaeobotany》2004,13(3):207-212
Uncarbonized fruits of the Boraginaceae occur widely in cultural layers of archaeological sites in the Mediterranean and the Near East. To date, interpreting their origin remains problematic. It is difficult for archaeobotanists to tell whether such fruits were deposited as part of the cultural layer or were introduced post-depositionally. In an attempt to answer this question for the early Bronze Age site of Hirbet ez-Zeraqon (Jordan), we used direct 14C dating of biogenic carbonate from calcareous fruits of Lithospermum. The radiocarbon ages of seven fossil samples of the fruits suggest that they originate from plants that grew during or around the time of occupation. 相似文献
12.
The present study is based on oribatid mite material (Acari, Oribatida) collected from the Oumé region (Côte d’Ivoire, West Africa) in 2007. A list of identified taxa, including 67 species from 50 genera and 31 families, is presented; all species, genera and families are registered in this country for the first time; Kalloia simpliseta, Scheloribates latoincisus and Pergalumna paraelongata are recorded in the Ethiopian region for the first time. One new species of the genus Arcoppia (Oppiidae) is described; A. goulikaoensis Ermilov sp. n. differs from A. robusta Mahunka, 1988 by the well-developed bothridial heads (versus not developed), barbed branches on the bothridial setae (versus smooth) and smooth notogaster surface (versus lineolate). 相似文献
13.
Two new species ofPseudopetigurus are described from northern Hunan Province, China.P. deprati n. sp. is abundant in the upper Zitai Formation (upper Arenig) of Shuanghong, Baiyun, Shimen County, andP. expansus n. sp. occurs throughout the Jiuxi Formation (Arenig — lower Llanvirn) of Panjiazui, Taoyuan County. These formations represent
outer shelf facies from the Jiangnan Transitional Belt of the South China Plate, close to the southeast margin of the Yangtze
Platform. BothP. deprati andP. expansus show similarities to Upper Ordovician species ofPseudopetigurus recorded from South China. Other species ofPseudopetigurus are known almost entirely from cranidia, but pygidia and librigenae are also described for both new species, and the first
known hypostome assigned to the genus is described forP. expansus. These two species are ecologically important members of offshore trilobite faunas during the Arenig — Llanvirn and define
the outer shelfPseudopetigurus Association of South China. Despite being a deep-water genus,Pseudopetigurus is biogeographically restricted to the western margin of the Gondwanan craton and neighbouring regions of Baltica.
相似文献
14.
《Geobios》2020
A new species, Phoenicopsis anadyrensis Nosova, is described based on the leaf morphology and cuticle features from the Maastrichtian–Danian Rarytkin Formation, Chukotka, North-East of Russia. It is characterized by hypostomatic leaves with stomatal bands on the abaxial side, undulate anticlinal epidermal cell walls and papillae on the epidermal cells and on the subsidiary cells of the stomata. The new species is the youngest reliable representative of the genus Phoenicopsis. This record extends the stratigraphic range of Phoenicopsis from its previously known latest records in the early Campanian up to Maastrichtian–Danian. The persistence of the genus Phoenicopsis up to the Cretaceous–Paleogene boundary is most likely related with vicinity to mountain floras associated with Late Cretaceous and Paleogene volcanic uplands. 相似文献
15.
Mattéotti C Haubruge E Thonart P Francis F De Pauw E Portetelle D Vandenbol M 《FEMS microbiology letters》2011,314(2):147-157
The gut of the termite Reticulitermes santonensis contains an interesting diversity of prokaryotic and eukaryotic microorganisms not found elsewhere. These microorganisms produce many enzyme-digesting lignocellulosic compounds, probably in cooperation with endogenous enzymes. Regarding cellulose and hemicellulose digestion in the termite gut, much remains to be learned about the relative contributions of termite enzymes and enzymes produced by different microorganisms. Here we grew bacterial colonies from termite gut suspensions, identifying 11 of them after PCR amplification of their 16S rRNA genes. After constructing in Escherichia coli a genomic DNA library corresponding to all of the colonies obtained, we performed functional screening for α-amylase, xylanase, β-glucosidase, and endoglucanase activities. This screen revealed a clone producing β-glucosidase activity. Sequence analysis showed that the cloned genomic DNA fragment contained three complete ORFs (bglG, bglF, and bglB) organized in a putative bgl operon. The new β-glucosidase (BglB), identified with its regulators BglG and BglF, belongs to glycoside hydrolase family 1. The new β-glucosidase was expressed in E. coli and purified by affinity chromatography. The purified enzyme shows maximal activity at pH 6.0 and 40?°C. It also displays β-xylosidase activity. 相似文献
16.
All representatives of the genus Ilyocryptus with short lateral setae at the postanal margin of the postabdomen may be separated
into the compact species group I. brevidentatus s. lat. A new species of Ilyocryptus from this group is described from the
Lake Numalla, Queensland, Australia. I. smirnovi n. sp. shows clear morphological differences in the armature of the valve,
postabdomen, and several other structures, from all other species of the group. Differences between members of the above-mentioned
species group are analogous with those between European species, listed by Štifter (1991).
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
17.
Gabrel Lio Federico L. Agnolín Rubén Juarez Valieri Leonardo Filippi Diego Rosales 《Historical Biology》2016,28(6):835-841
Peirosauridae is composed of mid- to large-sized terrestrial mesoeucrododylian crocodyliforms distributed throughout Gondwanan landmasses. Here we describe a new peirosaurid that comes from the upper levels of the Portezuelo Formation (Turonian–Coniacian, Upper Cretaceous) from Loma de la Lata, Neuquén Province, Argentina. This specimen consists of some associated bones belonging to a single individual. In order to facilitate comparisons, we recognise two different peirosaurid morphotypes based on skull shape: broad- and narrow-snouted taxa. The new taxon may be related to broad-snouted taxa, especially Gasparinisuchus peirosauroides. The new taxon here reported has strong heterodont dentition when compared with other peirosaurids. As in related forms, the fourth dentary tooth is caniniform, very large, acute and transversely compressed (much more than other peirosaurids), and the anterior dentary teeth have less globular, sharp serrated crowns. Large interalveolar spaces are present between both mandibular and maxillary teeth, a trait only observed on the new taxon. With this addition, we elevate the number of Patagonian peirosaurids to four. Moreover, it represents together with Lomasuchus palpebrosus the second peirosaurid species described for the Portezuelo Formation. 相似文献
18.
John F. Pruski 《Brittonia》1991,43(4):264-268
Described and illustrated from Cerro de la Neblina in T. F. Amazonas, Venezuela is the fifth known Guayanan species ofPentacalia, a genus recently reinstated from synonymy withinSenecio. The distinctions between these two genera are briefly discussed as are the distinctions betweenPentacalia and similar genera. A key to the new species,Pentacalia neblinesis, and the other species ofPentacalia from the Guayana Highland is given. 相似文献
19.
In 2000, remains of an unknown Triticum species—later named ‘new glume wheat’ (NGW)—were identified in the archaeobotanical material of Neolithic and Bronze Age Greek sites. The presence of NGW was later reported from several other locations across Europe, from the seventh to the first millennium cal. b.c. During the systematic archaeobotanical survey of the multiperiod site of Hódmez?vásárhely–Kopáncs I., Olasz-tanya (5310–2936 cal. b.c.) more than 2,000 cereal remains were recovered. During the morphological analyses, ten spikelet forks showed the distinctive traits of NGW, therefore morphometric analyses were conducted on the remains to reinforce the morphological identification. The results suggest that both approaches—morphological and morphometric—should be applied in parallel to securely separate the NGW remains from Triticum turgidum L. ssp. dicoccum (Schrank) Thell. (emmer) and T. monococcum L. ssp. monococcum (einkorn). All NGW glume bases were recovered from Late Copper Age features (3338–3264 cal. b.c.) of the settlement, which represent the Baden culture of the Great Hungarian Plain. Similarly to other Baden culture sites of the Carpathian Basin einkorn and emmer dominated the crop production of the settlement. The ratio of the NGW remains within the cereal assemblage was measured to be 0.48 %, which suggests that NGW did not have the status of a regular crop; still it may have been part of the accompanying weed flora of the cereal fields during the fourth millennium in the south-eastern Great Hungarian Plain landscape. 相似文献
20.
A new species of deepwater morid fish,Gadella thysthlon, is described on the basis of five specimens from the Galápagos Islands. It differs from other species ofGadella by its low dorsal and anal fin ray counts (8+56–58 and 64–66 respectively), moderate number of gill rakers (4–5+9–11), small
luminous organ that is closer to the anus than the interventral line, and its dark body, bright red-orange median fins with
dark bases, and melanophores on the tongue apex and the palatal midline. 相似文献