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morphological variation of Conodonts Platyvillosus from Yinkeng Formation in Chaohu,Anhui Province,China

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Journal of China University of Geosciences 2003年第4期14卷 306-313页

作者： ZhaoLaishi TongJinnan MichaelJOrchard FacultyofEarthSciences ChinaUniversityofGeosciencesWuhan430074 GeologicalSurveyofCanada VancouverV6B5J3Canada

A preciously undescribed Lower Triassic sequence of a series of multiple cycles of mud-lime rocks, with the argillaceous content decreasing upward while limestone becomes the dominant lithology in the upper part, contains abundant fossils such as conodonts, ammonoids and bivalves. The Yinkeng Formation is the oldest Triassic unit represented, and it conformably overlies dark-gray thin-bedded argillaceous silicalite and intercalated grayish illite clay interbeds of the Upper Permian of Dalong *** samples collected from west Pingdingshan Section, one of four measured sections in Chaohu,yielded abundant Lower Triassic conodonts from the middle part of the Yinkeng Formation. Most interesting and unusual is the abundant occurrence of Platyvillosus in seven samples from the FlemingitesEuflemingites bearing (Smithian) mudstone, rhyolitic clay and limestone part of the section. The associated conodonts are Neospathodus dieneri type 1, N. dieneri type 2, N. dieneri type 3, N. cristagalii, N. waageni eowaageni (nov. subsp. ), N. waageni elongata (nov. subsp. ), N. waageni waageni,N. sp. G (nov. sp.), N. sp. L (nov. sp.), N. sp. H (nov. sp.), N. alberti, N. novaehollandiae,N. peculiaris, N. aff. discretus, N. conservativus, Parachirognathodus sp. and ramiform *** species Platyvillosus, which is restricted to a 1. 32 m interval, reveals great variety in shape and denticle ornamentation pattern on the platform. The morphological study of the samples indicates that all speciemens with denticles on the upper surface can be included in intraspecific variation in Platyvillosus costatus (Staesche). Platyvillosus hamadai (Koike), marked by smooth upper surface, also appears to be connected by transitional forms in some samples. The fauna corresponds closely with that of the Taho limestone in Japan, although the depositionai environments differ. The associated lithologies of the Yinkeng Formation within Chaohu area reflect a deeper and iow energy remaining basin

关键词： Platyvillosus morphological variation conodont Chaohu

Quantitative Study of the morphological variations among Dzieduszyckia Populations from the Devonian Rongxian Formation,South China and their Influencing Factors

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1604-1615页

作者： LI Tong DONG Lin SUN Yuanlin YUAN Zhiwei NIE Ting LING Kun Key Laboratory of Orogenic Belts and Crustal Evolution MOEPeking UniversityBeijing 100871China School of Earth and Space Science Peking UniversityBeijing 100871China

The rhynchonellide brachiopod Dzieduszyckia Siemiradzki is widely distributed in the Lower Famennian strata,and exhibits a wide range of morphological variations among populations.1272 autochthonous Devonian Rongxian Dzieduszyckia fossils were collected from three populations in South China,namely the Dazhai,Dalong,and Longmi sections.A series of quantitative morphological analyses were conducted to understand the morphological variation among populations and identify the triggers responsible for such *** results show that the Dazhai population differs significantly in morphospace from the Dalong and Longmi populations,while the latter two exhibit more similar morphological features,suggesting that geographic distribution may play a key role in affecting Dzieduszyckia *** Longmi population shows a distinct morphospace from the Dazhai population and an overlapped morphospace with the Dalong population,indicating that habitat may not be the controlling ***,the Dazhai and Dalong populations share some morphological similarities,but the Dazhai and Longmi populations occupy completely different morphospaces,indicating that evolution had a greater impact on phenotypic divergence than *** findings suggest that geographic distribution is the predominant factor influencing the morphological variation of Dzieduszyckia,while evolution and living habitat are less significant,the former of which might play a more important role.

关键词： Dzieduszyckia morphological variation geographic distribution evolution habitat NMDS

morphological, Cultural, Molecular and Pathogenic variation of Bipolaris sorokiniana in Wheat

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American Journal of Molecular Biology 2022年第4期12卷 190-202页

作者： A. Sharmin F. M. Aminuzzaman T. H. Ansari M. Ahmed Department of Plant Pathology Faculty of Agriculture Sher–e–Bangla Agricultural University Dhaka Bangladesh Plant Pathology Division Bangladesh Rice Research Institute (BRRI) Gazipur Bangladesh

One hundred and twenty isolates of Bipolaris sorokiniana of wheat were isolated, identified and characterized based on morphological, cultural, pathogenic and ITS (Internal Transcribed Spacer) based molecular parameters. Collected isolates differed in respect of radial mycelial growth rate, color of the colony, surface texture of the colony, shape of the colony, conidia production ability and shape and color of conidia. ITS1 and ITS4 based PCR products yielded a species-specific band of 600 bp (base pairs) on agarose gel for the confirmation of B. sorokiniana. The mycelial growth rate of the isolates ranged from 1.39 to 4.46 mm/day. The septation of conidia ranged from 1.4 to 8.6. On the basis of conidia morphology, the isolates were grouped into five different groups, whereas the isolates were grouped into 12 cultural groups based on cultural characteristics. Cultural group 8 [CG (Cultural Group)-8] was the most virulent [38.5% LAD (Leaf area diseased)] and [CG (cultural Group)-4] was the less virulent [2% LAD (Leaf area diseased)] group among 12 groups when inoculated at tillering stage of wheat cv. Kachan.

关键词： B. sorokiniana Wheat morphological variation Cultural variation Molecular variation Virulence

Interspecific delimitation and phylogenetic origin of Pugionium(Brassicaceae)

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Journal of Systematics and Evolution 2010年第3期48卷 195-206页

作者： 1,2,3Qiu-Shi YU 1Qian WANG 1Ai-Lan WANG 1Gui-Li WU 3Jian-Quan LIU 1(Division of Molecular Ecology,Key Laboratory of Arid and Grassland Ecology,School of Life Science,Lanzhou University,Lanzhou 730000,China) 2(Minqin National Studies Station for Desert Steppe Ecosystem,Minqin 733300,China) 3(Gansu Desert Control Research Institute,Lanzhou 730070,China) (Division of Molecular Ecology Key Laboratory of Arid and Grassland Ecology School of Life Science Lanzhou University Lanzhou 730000 China) (Minqin National Studies Station for Desert Steppe Ecosystem Minqin 733300 China) (Gansu Desert Control Research Institute Lanzhou 730070 China)

Pugionium(Brassicaceae)is a small genus that occurs in central Asian *** interspecific delimitation and taxonomic treatments of this genus are disputed and its phylogenetic origin remains unknown. In the present study,we examined these issues based on morphological and molecular data obtained for the first *** used statistical methods to examine inter-and intraspecific morphological *** results suggest that only two species,namely *** and ***,can be warranted for all examined populations and specimens,whereas three species(***,***,and ***)should be incorporated into P. *** delimitation was further supported by the molecular data:all populations of ***,P. calcaratum,***,and *** shared the same internal transcribed spacer genotype,whereas those from *** had another *** analyses of Pugionium and representative genera of Brassicaceae based on ndhF sequences suggest that this genus is sister to the genus Megacarpaea,which,together,comprise a well-supported lineage with Farsetia,Lobularia,Iberis,and Ionopsidium,whereas the two other genera that were previously suggested to be closely related to this genus(Isatis and Bunias)were placed in the other *** further discuss the origin of Pugionium and suggest that it probably originated in central Asia when the climate became drier from the late Miocene.

关键词： internal transcribed spacer(ITS) interspecific delimitation morphological variation ndhF phyloge- netic origin Pugionium.

Discovery of Japalura chapaensis Bourret,1937(Reptilia:Squamata:Agamidae)from Southeast Yunnan Province,China

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Zoological Research 2018年第2期39卷 105-113页

作者： Kai Wang Ke Jiang Yu-Fan Wang Nikolay A.Poyarkov Jr. Jing Che Cameron D.Siler Sam Noble Oklahoma Museum of Natural History & Department of Biology University of Oklahoma Kunming Institute of Zoology Chinese Academy of Sciences Southeast Asia Biodiversity Research Institute Chinese Academy of Sciences Zhejiang Forest Resource Monitoring Center Department of Vertebrate Zoology Biological Faculty Lomonosov Moscow State University

Due to a paucity of surveys in northern Indochina and lack of international collaborations among neighboring countries, recognized distributional ranges for many amphibian and reptile species end at the political borders for some countries, despite seemingly continuous suitable habitat spanning the region. Combining both morphological and genetic data, we report the first discovery of Japalura chapaensis, a rare agamid lizard believed previously to be endemic to northern Vietnam only, along the border region of southeastern Yunnan Province,China. To facilitate future research on the genus Japalura sensu lato in Indochina, we provide detailed descriptions of additional specimens of this rare species, including the first description of coloration in life and an expanded diagnosis, and discuss the species boundary of J. chapaensis with respect to its congeners.

关键词： Draconinae Indochina morphological variation New record Range extension Systematics Taxonomy

Polyploid induction of Lespedeza formosa by colchicine treatment

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Forest Ecosystems 2007年第4期9卷 283-286页

作者： Li Wei1 Hu Dong-nan2 Li Hui1 Chen Xiao-yang1 1College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, P. R. China 2College of Landscape Architecture and Art, Jiangxi Agriculture University, Nanchang 330045, P. R. China College of Biological Sciences and Biotechnology Beijing Forestry University Beijing P. R. China College of Landscape Architecture and Art Jiangxi Agriculture University Nanchang P. R. China

Polyploid induction has been conducted by different colchicines concentrations with seed, hypocotyl and apices of Lespe-deza formosa. morphological variation and amounts of chromosome about the polyploidy have also been analyzed. Results show that the best material for polyploid induction of L. formosa is the new apices from seed germination, with an induction rate of 44.4% at 0.1% colchicines concentration and 36 hours of treatment time. Compared with normal diploid plants, the polyploidy plants of L. for-mosa inducted in our experiments have short stature and stems with thick and wide leaves. Cytological studies show that the changed seedlings, whose morphology has changed dramatically, are tetraploid, with 44 (2n = 4x = 44) chromosomes in the somatic cells.

关键词： Lespedeza formosa colchicines polyploid induction morphological variation

Comparative Study on the Infectivity and Spore Surface Protein of Nosema bombycis and Its morphological Variant Strain

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Agricultural Sciences in China 2005年第6期4卷 475-480页

作者： HUANGShao-kang LUXing-meng InvertebratePathologyLaboratory AnimalScienceCollegeZhejiangUniversityHangzhou310029P.R.China／／BeeScienceCollegeFujianAgricultureandForestryUniversityFuzhou350002P.R.China InvertebratePathologyLaboratory AnimalScienceCollegeZhejiangUniversityHangzhou310029P.R.China

A new morphological variant strain of microsporidium was produced by infecting the mulberry looper, Hemerophilaatrilineata [Phthonandria atrilineata], with Nosema bombycis successively for 24 times, and named 24Nbh. Comparativestudies on morphology, infectivity and spore surface protein were conducted. 24Nbh was short and wide, and had asignificant difference (Pvariation in infectivity of the spores.

关键词： Nosema bombycis morphological variation Infectivity Surface protein Two dimensional electrophoresis

Effects of heavy metal(Pb) concentration on some growth parameters of plants grown in lead polluted soil under organic fertilizer amendment

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Research in Cold and Arid Regions 2016年第1期8卷 36-45页

作者： Ojo M.Oseni Adekunle A.Adelusi Esther O.Dada Abdulfatai B.Rufai Department of Botany Faculty of ScienceObafemi Awolowo University Department of Biological Sciences(Ecology and Environmental Studies Unit) Joseph Ayo Babalola University

This study investigated morphological variation and biomass accumulation that occurred in Sida acuta and Chromolaena odorata plants grown in lead polluted soil under organic fertilizer amendment. The study was carried out in the screen house at the Biological Gardens of the Obafemi Awolowo University, Ile-Ife, Osun State. The experiment was a factorial combination of one heavy metal （Pb） at five levels of concentration （0, 200, 400, 800 and 1,000 mg/kg） in a completely randomized design, and were replicated three times for each of the two plants and two levels （0 g/kg and 9.4 g/kg） of organic fertilizer （OBD-Plus）. Each pot was filled with 5 kg of air-dried and sieved soil and placed on a plastic tray for the collection of excess water. Two weeks after planting, seedlings of uniform height were transplanted from the nursery to experimental pots at the rate of one seedling per pot and grown for 10 weeks. The growth parameters of the plants were biomonitored for 7 weeks. After 10 weeks of treatment, the plants were harvested and dried to calculate the biomass accumulation. The two plant species performed better under fertilizer application than without it. For each of the plant species the growth parameters decreased as the levels of Pb concentration increased. Furthermore, the plants＇ biomass decreased significantly （p 〈0.05） as the levels of Pb concentration increased. The organic fertilizer helped to improve the plants＇ performance in lead-polluted soil.

关键词： morphological variation organic fertilizer lead biomonitored biomass

Gracilariopsis lemaneiformis(Gracilariaceae,Rhodophyta)in the Mexican Coasts:A Case of Disjunct Distribution?

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American Journal of Plant Sciences 2020年第2期11卷 111-124页

作者： Oscar E.Hernandez Kurt M.Dreckmann Maria Luisa Nunez-Resendiz Martha Isabel Vilchis Abel Senties Doctorado en Ciencias Biológicas y de la Salud Universidad Autónoma Metropolitana-IztapalapaMexico CityMéxico Departamento de Hidrobiología Universidad Autónoma Metropolitana-IztapalapaMexico CityMéxico

Gracilariopsis lemaneiformis is a widely reported species of marine red algae, with records from around the world. Particularly in Mexico, it has been recorded along the coasts of the Gulf of Mexico and the Mexican Caribbean as well as the Tropical Mexican Pacific;so, its current distribution on the Mexican coasts is disjunct. From its molecular characterization with COI-5P and rbcL sequences of specimens collected at sites in Mexico where this species has been most frequently recorded, our aim was to re-evaluate the current distribution of Gp. lemaneiformis on the Mexican coasts and discuss the taxonomic implications. Phylogenetic analysis, supported by DNA species delimitation methods, genetic distances and morphological comparisons, showed that the current disjunct distribution of Gp. lemaniformis in Mexico is a consequence of taxonomic misidentifications. From our results, Gp. lemaneiformis is the only species of the genus with a distribution in the Tropical Mexican Pacific, whereas Gp. tenuifrons is the only species with a distribution in the Gulf of Mexico and the Mexican Caribbean. Also, we propose that Gp. cata-luziana is to be merged with Gp. tenuifrons, while Gp. costarisensis is to be merged with Gp. lemaneiformis.

关键词： COI-5P Cosmopolitan morphological variation rbcL Species Delimitation