Botany (Effective from 2018 Admissions)
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Life and Time of Indian Williamsonia
Life and time of Indian Williamsonia )ayasri Banerji Banerji, J 1992. Life and time of Indian Williamsonia. Palaeobotanist 40 : 245-259. The Williamsonia plant, belonging to the order Bennettitales, consists of stem-Bucklandia Presl, leaf Ptilophyllum Morris, male flower- Weltrichia Braun and female flower- Williamsonia Carruthers. This plant was perhaps a small, much branched woody tree of xerophytic environment. It co-existed alongwith extremely variable and rich flora including highly diversified plant groups from algae to gymnosperms. In India, it appeared during the marine Jurassic, proliferated and widely distributed in the Lower Cretaceous and disappeared from the vegetational scenario of Upper Cretaceous Period with the advent of angiosperms. Key-words-Bennettitales, Williamsonia, Jurassic-Cretaceous (India). jayasri Baner}i, Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226007, India. ri~T ~ 'lfmftq- fili'<1QQ«lf.:lQi "" om~~ "l?li'O'$i'OI<1fl \f>'f it ~ filf<1QQ«lf.:lQi qtfr if ~ ~ 3!<'flT-3!<'flT 'lTIif it ~ "lTif t W'I'T CAT-~ m, ~ ~ ~it ~fu;m;;mrr~1 ~qtm~~ <ffir ll~<'ilf4>~<'1'i"li'tfGr, "''!'''l ~~?l~Ti:t>Qi <ilf.1 'I"lT filf<1QQ«lf.:lQi ~ ~ ~ f;;ru-if.~ ~ 61'1'~dOl'h\'i if m <'IT<'1T ~ Wc:r, 3!fuq,iffiliOlT3if it ~ ¥i "IT' ~ it il'1f4ff1"1ld, it if qtfr ~ 'it, q;r tt ~ ~tl W'I'T~~'-I'<"1if~~3lT, 3Tahmm'-l'<"1if~~~-~'d"f~<f"lT'3'1f'<mm~ ~ ~ ~ ~ if qtm if if t1T"f -flT"f lIT lfllT' LIFE OF WILLIAMSONIA PLANT B. dichotoma Sharma. In B. indica Seward, the secondary wood is more compact than recent cycads In the Upper Mesozoic Era, a new group of and cycadeoids. -
JUDD W.S. Et. Al. (2002) Plant Systematics: a Phylogenetic Approach. Chapter 7. an Overview of Green
UNCORRECTED PAGE PROOFS An Overview of Green Plant Phylogeny he word plant is commonly used to refer to any auto- trophic eukaryotic organism capable of converting light energy into chemical energy via the process of photosynthe- sis. More specifically, these organisms produce carbohydrates from carbon dioxide and water in the presence of chlorophyll inside of organelles called chloroplasts. Sometimes the term plant is extended to include autotrophic prokaryotic forms, especially the (eu)bacterial lineage known as the cyanobacteria (or blue- green algae). Many traditional botany textbooks even include the fungi, which differ dramatically in being heterotrophic eukaryotic organisms that enzymatically break down living or dead organic material and then absorb the simpler products. Fungi appear to be more closely related to animals, another lineage of heterotrophs characterized by eating other organisms and digesting them inter- nally. In this chapter we first briefly discuss the origin and evolution of several separately evolved plant lineages, both to acquaint you with these important branches of the tree of life and to help put the green plant lineage in broad phylogenetic perspective. We then focus attention on the evolution of green plants, emphasizing sev- eral critical transitions. Specifically, we concentrate on the origins of land plants (embryophytes), of vascular plants (tracheophytes), of 1 UNCORRECTED PAGE PROOFS 2 CHAPTER SEVEN seed plants (spermatophytes), and of flowering plants dons.” In some cases it is possible to abandon such (angiosperms). names entirely, but in others it is tempting to retain Although knowledge of fossil plants is critical to a them, either as common names for certain forms of orga- deep understanding of each of these shifts and some key nization (e.g., the “bryophytic” life cycle), or to refer to a fossils are mentioned, much of our discussion focuses on clade (e.g., applying “gymnosperms” to a hypothesized extant groups. -
Major Evolutionary Trends in the Angiosperm Fossil Record
Colloquium Toward a new synthesis: Major evolutionary trends in the angiosperm fossil record David Dilcher* Florida Museum of Natural History, University of Florida, Gainesville, FL 32611-7800 Angiosperm paleobotany has widened its horizons, incorporated Nature and Origin of Primitive Angiosperms,’’ there is no new techniques, developed new databases, and accepted new substantive use of the fossil record to address this question. questions that can now focus on the evolution of the group. The The theories and hypothesis presented by Stebbins are based fossil record of early flowering plants is now playing an active role on the comparative morphology and anatomy of living angio- in addressing questions of angiosperm phylogeny, angiosperm sperms considered primitive at that time rather than the fossil origins, and angiosperm radiations. Three basic nodes of angio- record of early angiosperms. sperm radiations are identified: (i) the closed carpel and showy However, at the same time, the early 1970s, special attention radially symmetrical flower, (ii) the bilateral flower, and (iii) fleshy was being focused on the fine features of the morphology of fruits and nutritious nuts and seeds. These are all coevolutionary angiosperm leaf venation and the cuticular anatomy of living and events and spread out through time during angiosperm evolution. fossil angiosperms (2, 6–8). Most of the early angiosperms from The proposal is made that the genetics of the angiosperms pres- the Cretaceous and early Tertiary were being found to be extinct sured the evolution of the group toward reproductive systems that or only distantly related to living genera (Fig. 3). Grades and favored outcrossing. This resulted in the strongest selection in the clades of relationships were being founded on the basis of careful angiosperms being directed toward the flower, fruits, and seeds. -
Curriculum Vitae
CURRICULUM VITAE ORCID ID: 0000-0003-0186-6546 Gar W. Rothwell Edwin and Ruth Kennedy Distinguished Professor Emeritus Department of Environmental and Plant Biology Porter Hall 401E T: 740 593 1129 Ohio University F: 740 593 1130 Athens, OH 45701 E: [email protected] also Courtesy Professor Department of Botany and PlantPathology Oregon State University T: 541 737- 5252 Corvallis, OR 97331 E: [email protected] Education Ph.D.,1973 University of Alberta (Botany) M.S., 1969 University of Illinois, Chicago (Biology) B.A., 1966 Central Washington University (Biology) Academic Awards and Honors 2018 International Organisation of Palaeobotany lifetime Honorary Membership 2014 Fellow of the Paleontological Society 2009 Distinguished Fellow of the Botanical Society of America 2004 Ohio University Distinguished Professor 2002 Michael A. Cichan Award, Botanical Society of America 1999-2004 Ohio University Presidential Research Scholar in Biomedical and Life Sciences 1993 Edgar T. Wherry Award, Botanical Society of America 1991-1992 Outstanding Graduate Faculty Award, Ohio University 1982-1983 Chairman, Paleobotanical Section, Botanical Society of America 1972-1973 University of Alberta Dissertation Fellow 1971 Paleobotanical (Isabel Cookson) Award, Botanical Society of America Positions Held 2011-present Courtesy Professor of Botany and Plant Pathology, Oregon State University 2008-2009 Visiting Senior Researcher, University of Alberta 2004-present Edwin and Ruth Kennedy Distinguished Professor of Environmental and Plant Biology, Ohio -
Williamsonia Stewardiana, (Open Canopy Growth Form) E.G
Were Mesozoic Ginkgophytes Shrubby? Data on leaf morphology in the Mesozoic of North America shows a proportional increase of bifurcated, ginkgo-like leaves during the middle of the Jurassic. This ginkophyte acme is correlated with W. A. Green—Department of Geology—Yale University—P. O. Box 208109, Yale Station—New Haven, Connecticut 06520—[email protected] a decreased proportion of the leaf forms associated with herbaceous or shrubby pteridophytes, and with no substantial change in the proportion of leaf forms associated with canopy gymnosperms. The increase in ginkgo-like foliage at the same time as fern-like forms decreased in relative abundance suggests replacement of The conventional view sees all ginkgophytes as some part of the forest understory or early-successional habitats by early ginkgophytes. That is, early ginkgophytes may not have arborescent, by analogy with modern Ginkgo biloba: been competing for light or water in an established gymnosperm canopy. This suggests that most Mesozoic ginkgophytes were shrubs rather than being large trees like the surviving Ginkgo biloba. Such a result explains the absence of Mesozoid ginkgophyte wood and supports the argument that has already been made from sedimentological data, that to a much greater extent than do individuals of Ginkgo biloba now cultivated around the world, many ancestral ginkgophytes pursued early-successional strategies. 1: Competitive displacement alues) 2 v Records of Jurassic fossil occurrences in the Compendium Index of Mesozoic and Cenozoic Jurassic Records -
Terra Nostra 2018, 1; Mte13
IMPRINT TERRA NOSTRA – Schriften der GeoUnion Alfred-Wegener-Stiftung Publisher Verlag GeoUnion Alfred-Wegener-Stiftung c/o Universität Potsdam, Institut für Erd- und Umweltwissenschaften Karl-Liebknecht-Str. 24-25, Haus 27, 14476 Potsdam, Germany Tel.: +49 (0)331-977-5789, Fax: +49 (0)331-977-5700 E-Mail: [email protected] Editorial office Dr. Christof Ellger Schriftleitung GeoUnion Alfred-Wegener-Stiftung c/o Universität Potsdam, Institut für Erd- und Umweltwissenschaften Karl-Liebknecht-Str. 24-25, Haus 27, 14476 Potsdam, Germany Tel.: +49 (0)331-977-5789, Fax: +49 (0)331-977-5700 E-Mail: [email protected] Vol. 2018/1 13th Symposium on Mesozoic Terrestrial Ecosystems and Biota (MTE13) Heft 2018/1 Abstracts Editors Thomas Martin, Rico Schellhorn & Julia A. Schultz Herausgeber Steinmann-Institut für Geologie, Mineralogie und Paläontologie Rheinische Friedrich-Wilhelms-Universität Bonn Nussallee 8, 53115 Bonn, Germany Editorial staff Rico Schellhorn & Julia A. Schultz Redaktion Steinmann-Institut für Geologie, Mineralogie und Paläontologie Rheinische Friedrich-Wilhelms-Universität Bonn Nussallee 8, 53115 Bonn, Germany Printed by www.viaprinto.de Druck Copyright and responsibility for the scientific content of the contributions lie with the authors. Copyright und Verantwortung für den wissenschaftlichen Inhalt der Beiträge liegen bei den Autoren. ISSN 0946-8978 GeoUnion Alfred-Wegener-Stiftung – Potsdam, Juni 2018 MTE13 13th Symposium on Mesozoic Terrestrial Ecosystems and Biota Rheinische Friedrich-Wilhelms-Universität Bonn, -
Bennettitales) from the Bajocian of Yorkshire
Int. J. Plant Sci. 170(9):1195–1200. 2009. Ó 2009 by The University of Chicago. All rights reserved. 1058-5893/2009/17009-0007$15.00 DOI: 10.1086/605873 THE POLLEN ULTRASTRUCTURE OF WILLIAMSONIELLA CORONATA THOMAS (BENNETTITALES) FROM THE BAJOCIAN OF YORKSHIRE Natalia Zavialova,1,* Johanna van Konijnenburg-van Cittert,y and Michael Zavadaz *A. A. Borissiak Paleontological Institute, Russian Academy of Sciences, Profsoyusnaya 123, Moscow 117647, Russia; yInstitute of Environmental Biology, Faculty of Science, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands, and the National Natural History Museum ‘‘Naturalis,’’ Leiden, The Netherlands; and zDepartment of Biological Sciences, East Tennessee State University, Box 70703, Johnson City, Tennessee 37614, U.S.A. The exine ultrastructure of Williamsoniella coronata Thomas from the Bajocian of Yorkshire (United Kingdom) was investigated with light, scanning electron, and transmission electron microscopy. The pollen averages 16.5 mm along its short axis and 24.5 mm along its long axis and is monosulcate, and the nonapertural sculpturing is distinctly verrucate. The pollen wall is homogeneous, and the sulcus membrane is composed of thin exine with scattered small granules. The pollen grains differ in exine sculpturing and pollen wall ultrastructure from pollen grains of the bennettitalean taxa Cycadeoidea dacotensis (MacBride) Ward and Leguminanthus siliquosis (Leuthardt) Kraeusel. They are similar to dispersed pollen grains of Granamonocolpites luisae Herbst from the Triassic Chinle Formation of the United States, supporting the bennettitalean affinity of these dispersed pollen grains. The Bennettitales are palynologically characterized by monosulcate ‘‘boat-shaped’’ pollen with a homogeneous or granular pollen wall ultrastructure. Keywords: exine sculpture, exine ultrastructure, Bennettitales, Jurassic. -
The Cycadofilicales, They Formed the Dominant Fossil Plants During Palaeozoic Age
UNIT-2 Cycadeoideales Introduction to Cycadeoideales: The Cycadofilicales, they formed the dominant fossil plants during Palaeozoic age. The Cycadofilicales have of course definite affinities with the cycads on one side and ferns on the other, but they had no cones either in the male or in the female part of the plants, so some workers think that the Cycadofilicales form a separate group quite distinct from gymnosperms. In the Mesozoic times, however, we came across fossils plants which had cones and were definitely related to gymnosperms. So in Mesozoic the Cycadofilicales were replaced by true gymnosperms which formed strobili, and the seeds had a naked dicotyledonous embryo in them. The ovule or the seed was never enclosed in closed carpel. The Mesozoic gymnosperms can be placed into two separate groups: 1. Cycadeoidale (Bennettitales) and 2. Cycadales. Pant (1957) has placed the cycadeiods in a distinct class, the Cycadeoideopsida of the division Cycadophyta. The Cycadeoideales (Bennettitales) first appeared in the Permian they reached their highest range during the Jurassic period, after which they disappeared altogether. The second group Cycadales had a world-wide distribution during the Mesozoic period Majority of them had altogether disappeared; only a few types have been left which are confined to special parts of the East. The present day cycads are only the remnants of very large dyeing out group, i.e., they are sometimes described as living fossils, because they are on their way to extinction. The Cycadeoideales (Bennettitales) were very much like the cycads in their general appearance, and as the Mesozoic had these two prominent groups of gymnosperms, so that period sometimes described as age of cycads. -
Fossil Cycads
ABriefReviewof The Fossil Cycads by RobertBuckley Illustationsby: DouglasHenderson, JohnSibbick &MarkHallett Pseudoctenis-type Cycadales and a Cycadeoid, Douglas Henderson Early Jurassic 1 1 Acknowledgements Douglas Henderson This publication has been prepared and donated to the Palm and Cycad Society of Florida, http://www.plantapalm.com as an overview of the fossil record of the Cycadales and is for informational purposes only. All photos, drawings and paintings are the property of and copyright by their respective photographers and artists. They are presented here to promote wider recognition of each artist’s work. Talented technical artists too often go under appreciated, as they follow in the footsteps of Charles R. Knight and others who recreate the magic of lost worlds with their paintings. Cycads in art are also often relegated to the backgrounds, yet equal care is lavished on these reconstructions as is on the dinosaurian stars of the scene. This article brings some of these supporting players out of the shadows. Books cited are available from http://www.amazon.com. Visit the Palm and Cycad Society’s web site and you will find a listing of books relating to palms and cycads, and a link to amazon.com. Distribution of this document for profit is prohibited. This is simply an overview since a systematic study of the fossil cycads has yet to be performed. Any errors or misconceptions in Ichthyostega, an early adventurer onto land in the first forests. the information presented here are those of the author. Devonian Period Robert Buckley August, 1999. 2 2 TheArtists Douglas Henderson His intense use of light and shadow, creative views, and brooding curtains of haze and mist allow Douglas Henderson’s work to capture a real sense of environment. -
Fossil Coniferous Wood from the Middle Jurassic of Liaoning Province, China ⁎ Hong-En Jiang A,B, David K
Available online at www.sciencedirect.com Review of Palaeobotany and Palynology 150 (2008) 37–47 www.elsevier.com/locate/revpalbo Fossil coniferous wood from the Middle Jurassic of Liaoning Province, China ⁎ Hong-En Jiang a,b, David K. Ferguson c, Cheng-Sen Li a,d, , Ye-Ming Cheng e a State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China b Academia Turfanica of Xinjiang Uygur Autonomous Region, Turpan 838000, China c Institute of Palaeontology, University of Vienna, Althanstraβe 14, A-1090 Vienna, Austria d Beijing Museum of Natural History, Beijing 100050, China e Geological Museum of China, Beijing 100034, China Received 20 April 2006; received in revised form 8 January 2008; accepted 15 January 2008 Available online 1 February 2008 Abstract Silicified coniferous wood was collected from the Lanqi Formation (late Middle Jurassic in age) at Shebudaigou Village, Liaoning Province, China. Three taxa are identified, namely Pinoxylon dacotense Knowlton, Xenoxylon phyllocladoides Gothan, and Araucariopitys sp. Based on these new data, and those of other fossil plants reported previously from the same formation, we consider the climate during the deposition of the Lanqi Formation was subtropical, humid and seasonal. In this respect the Lanqi flora differs from the coeval Shimengou and Longmen floras from North China. The Longmen flora was deposited during more humid, subtropical conditions, while the Shimengou Formation indicates that the climate was warm temperate and dry. Our data would suggest that the Late Jurassic climatic pattern was initiated as early as the late Middle Jurassic. © 2008 Elsevier B.V. -
Plant Remains from the Middle–Late Jurassic Daohugou Site of the Yanliao Biota in Inner Mongolia, China
Acta Palaeobotanica 57(2): 185–222, 2017 e-ISSN 2082-0259 DOI: 10.1515/acpa-2017-0012 ISSN 0001-6594 Plant remains from the Middle–Late Jurassic Daohugou site of the Yanliao Biota in Inner Mongolia, China CHRISTIAN POTT 1,2* and BAOYU JIANG 3 1 LWL-Museum of Natural History, Westphalian State Museum and Planetarium, Sentruper Straße 285, DE-48161 Münster, Germany; e-mail: [email protected] 2 Palaeobiology Department, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden 3 School of Earth Sciences and Engineering, Nanjing University, 163 Xianlin Avenue, Qixia District, Nanjing 210046, China Received 29 June 2017; accepted for publication 20 October 2017 ABSTRACT. A late Middle–early Late Jurassic fossil plant assemblage recently excavated from two Callovian– Oxfordian sites in the vicinity of the Daohugou fossil locality in eastern Inner Mongolia, China, was analysed in detail. The Daohugou fossil assemblage is part of the Callovian–Kimmeridgian Yanliao Biota of north-eastern China. Most major plant groups thriving at that time could be recognized. These include ferns, caytonialeans, bennettites, ginkgophytes, czekanowskialeans and conifers. All fossils were identified and compared with spe- cies from adjacent coeval floras. Considering additional material from three collections housed at major pal- aeontological institutions in Beijing, Nanjing and Pingyi, and a recent account in a comprehensive book on the Daohugou Biota, the diversity of the assemblage is completed by algae, mosses, lycophytes, sphenophytes and putative cycads. The assemblage is dominated by tall-growing gymnosperms such as ginkgophytes, cze- kanowskialeans and bennettites, while seed ferns, ferns and other water- or moisture-bound groups such as algae, mosses, sphenophytes and lycophytes are represented by only very few fragmentary remains. -
The Eco-Plant Model and Its Implication on Mesozoic Dispersed Sporomorphs for Bryophytes, Pteridophytes, and Gymnosperms
Review of Palaeobotany and Palynology 293 (2021) 104503 Contents lists available at ScienceDirect Review of Palaeobotany and Palynology journal homepage: www.elsevier.com/locate/revpalbo Review papers The Eco-Plant model and its implication on Mesozoic dispersed sporomorphs for Bryophytes, Pteridophytes, and Gymnosperms Jianguang Zhang a,⁎, Olaf Klaus Lenz b, Pujun Wang c,d, Jens Hornung a a Technische Universität Darmstadt, Schnittspahnstraße 9, 64287 Darmstadt, Germany b Senckenberg Research Institute and Natural History Museum, Senckenberganlage 25, 60325 Frankfurt/Main, Germany c Key Laboratory for Evolution of Past Life and Environment in Northeast Asia (Jilin University), Ministry of Education, Changchun 130026, China d College of Earth Sciences, Jilin University, Changchun 130061, PR China article info abstract Article history: The ecogroup classification based on the growth-form of plants (Eco-Plant model) is widely used for extant, Ce- Received 15 July 2020 nozoic, Mesozoic, and Paleozoic paleoenvironmental reconstructions. However, for most Mesozoic dispersed Received in revised form 2 August 2021 sporomorphs, the application of the Eco-Plant model is limited because either their assignment to a specific Accepted 3 August 2021 ecogroup remains uncertain or the botanical affinities to plant taxa are unclear. By comparing the unique outline Available online xxxx and structure/sculpture of the wall of dispersed sporomorph to the sporomorph wall of modern plants and fossil plants, 861 dispersed Mesozoic sporomorph genera of Bryophytes, Pteridophytes, and Gymnosperms are Keywords: Botanical affinity reviewed. Finally, 474 of them can be linked to their closest parent plants and Eco-Plant model at family or Ecogroup order level. Based on the demands of the parent plants to different humidity conditions, the Eco-Plant model sep- Paleoenvironment arates between hydrophytes, hygrophytes, mesophytes, xerophytes, and euryphytes.