Lycopodiaceae
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Origin and Evolution of Lycopods ""'"'Ill{
Origin and evolution of lycopods C. G. K. Ramanujam Ramanujam CGK 1992. Origin and evolution of lycopods. Palaeobotanist 41 51·57. The lycopods are known from as early as Sieginean Stage of the Lower Devonian. Lower and Middle Devonian lycopods were all herbaceous. Arborescent taxa appeared by Upper Devonian (e.g., Cyclostigma and Lepidosigillaria). The microphyllous foliage of lycopods seem to have originated from enations as well as telomic trusses. The lycopods auained peak of their evolution during the Upper Carboniferous. Towards the close of the Carboniferous and dawn of the Permian, with gradual dWindling and disappearance of swamps, the lepidodendrids suffered drastic decline numerically and phytogeographically. General aridity of the Triassic resulted in acute dwarfing as evidenced by Pleuromeia. This trend continued funher resulting in the highly telescoped Nathorstiana during the Cretaceous. The earlier lycopods were homosporous; heterospory appeared by Upper Devonian. Heterospory ran rampant in the Lepidodendrales. The ultimate in heterospory and the approach to seed habit could be witnessed in Lepidocarporz. Four discrete types of strobilus organization could be recognized by the Lower Carboniferous, viz., 1. Lepidostrobus type, 2. Mazocarpon type, 3. Achlamydocarpon type, and 4. Lepidocarpon type. Recent studies point towards the origin of lycopods along rwo different pathways, with both Zosterophyllopsida and Rhyniopsida representing the progenirors All available evidence show that Lycopsida constitutes a "Blind Alley" -
Huperzine a from Huperzia Species—An Ethnopharmacolgical Review Xiaoqiang Ma A,B, Changheng Tan A, Dayuan Zhu A, David R
Huperzine A from Huperzia species—An ethnopharmacolgical review Xiaoqiang Ma a,b, Changheng Tan a, Dayuan Zhu a, David R. Gang b, Peigen Xiao c,∗ a State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 201203, PR China b Department of Plant Sciences and BIO5 Institute, The University of Arizona, 303 Forbes Building, Tucson, AZ 85721-0036, USA c Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100094, PR China Abstract Huperzine A (HupA), isolated originally from a traditional Chinese medicine Qiang Ceng Ta, whole plant of Huperzia serrata (Thunb. ex Murray) Trev., a member of the Huperziaceae family, has attracted intense attention since its marked anticholinesterase activity was discovered by Chinese scientists. Several members of the Huperziaceae (Huperzia and Phlegmariurus species) have been used as medicines in China for contusions, strains, swellings, schizophrenia, myasthenia gravis and organophosphate poisoning. HupA has been marketed in China as a new drug for Alzheimer’s disease (AD) treatment and its derivative ZT-1 is being developed as anti-AD new drug candidate both in China and in Europe. A review of the chemistry, bioactivities, toxicology, clinical trials and natural resources of HupA source plants is presented. Keywords: Huperzine A; ZT-1; Alzheimer’s disease; Huperzia serrata; Huperziaceae; Drug discovery; Bioactivities; Clinical trials; Traditional Chinese -
Embryophytic Sporophytes in the Rhynie and Windyfield Cherts
Transactions of the Royal Society of Edinburgh: Earth Sciences http://journals.cambridge.org/TRE Additional services for Transactions of the Royal Society of Edinburgh: Earth Sciences: Email alerts: Click here Subscriptions: Click here Commercial reprints: Click here Terms of use : Click here Embryophytic sporophytes in the Rhynie and Windyeld cherts Dianne Edwards Transactions of the Royal Society of Edinburgh: Earth Sciences / Volume 94 / Issue 04 / December 2003, pp 397 - 410 DOI: 10.1017/S0263593300000778, Published online: 26 July 2007 Link to this article: http://journals.cambridge.org/abstract_S0263593300000778 How to cite this article: Dianne Edwards (2003). Embryophytic sporophytes in the Rhynie and Windyeld cherts. Transactions of the Royal Society of Edinburgh: Earth Sciences, 94, pp 397-410 doi:10.1017/S0263593300000778 Request Permissions : Click here Downloaded from http://journals.cambridge.org/TRE, IP address: 131.251.254.13 on 25 Feb 2014 Transactions of the Royal Society of Edinburgh: Earth Sciences, 94, 397–410, 2004 (for 2003) Embryophytic sporophytes in the Rhynie and Windyfield cherts Dianne Edwards ABSTRACT: Brief descriptions and comments on relationships are given for the seven embryo- phytic sporophytes in the cherts at Rhynie, Aberdeenshire, Scotland. They are Rhynia gwynne- vaughanii Kidston & Lang, Aglaophyton major D. S. Edwards, Horneophyton lignieri Barghoorn & Darrah, Asteroxylon mackiei Kidston & Lang, Nothia aphylla Lyon ex Høeg, Trichopherophyton teuchansii Lyon & Edwards and Ventarura lyonii Powell, Edwards & Trewin. The superb preserva- tion of the silica permineralisations produced in the hot spring environment provides remarkable insights into the anatomy of early land plants which are not available from compression fossils and other modes of permineralisation. -
Ordovician Land Plants and Fungi from Douglas Dam, Tennessee
PROOF The Palaeobotanist 68(2019): 1–33 The Palaeobotanist 68(2019): xxx–xxx 0031–0174/2019 0031–0174/2019 Ordovician land plants and fungi from Douglas Dam, Tennessee GREGORY J. RETALLACK Department of Earth Sciences, University of Oregon, Eugene, OR 97403, USA. *Email: gregr@uoregon. edu (Received 09 September, 2019; revised version accepted 15 December, 2019) ABSTRACT The Palaeobotanist 68(1–2): Retallack GJ 2019. Ordovician land plants and fungi from Douglas Dam, Tennessee. The Palaeobotanist 68(1–2): xxx–xxx. 1–33. Ordovician land plants have long been suspected from indirect evidence of fossil spores, plant fragments, carbon isotopic studies, and paleosols, but now can be visualized from plant compressions in a Middle Ordovician (Darriwilian or 460 Ma) sinkhole at Douglas Dam, Tennessee, U. S. A. Five bryophyte clades and two fungal clades are represented: hornwort (Casterlorum crispum, new form genus and species), liverwort (Cestites mirabilis Caster & Brooks), balloonwort (Janegraya sibylla, new form genus and species), peat moss (Dollyphyton boucotii, new form genus and species), harsh moss (Edwardsiphyton ovatum, new form genus and species), endomycorrhiza (Palaeoglomus strotheri, new species) and lichen (Prototaxites honeggeri, new species). The Douglas Dam Lagerstätte is a benchmark assemblage of early plants and fungi on land. Ordovician plant diversity now supports the idea that life on land had increased terrestrial weathering to induce the Great Ordovician Biodiversification Event in the sea and latest Ordovician (Hirnantian) -
THE EVOLUTION of XYLEM ANATOMY in EARLY TRACHEOPHYTES by ELISABETH ANNE BERGMAN
Conquering the terrestrial environment: the evolution of xylem anatomy in early tracheophytes Item Type text; Electronic Thesis Authors Bergman, Elisabeth Anne Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 27/09/2021 03:01:29 Item License http://rightsstatements.org/vocab/InC/1.0/ Link to Item http://hdl.handle.net/10150/626731 CONQUERING THE TERRESTRIAL ENVIRONMENT: THE EVOLUTION OF XYLEM ANATOMY IN EARLY TRACHEOPHYTES By ELISABETH ANNE BERGMAN ____________________ A Thesis Submitted to The Honors College In Partial Fulfillment of the Bachelors Degree With Honors in Biology with an Emphasis in Biomedical Sciences THE UNIVERSITY OF ARIZONA D E C E M B E R 2 0 1 7 Approved by: ____________________________ Dr. Brian Enquist Department of Ecology and Evolutionary Biology Acknowledgements Many thanks go to all of those who made contributions, big and small, to my honors thesis, and more notably, my education. Foremost, I thank Dr. Brian Enquist for accepting me into his lab and serving as my mentor for two years. I appreciate all of the time he put in to meet with me and help me to develop my honors thesis. Additional thanks go to Dr. Sean Michaletz who first introduced me to the work that would eventually become my honors thesis. From the University of Santa Cruz, California, I thank Dr. -
Belowground Rhizomes in Paleosols: the Hidden Half of an Early Devonian Vascular Plant
Belowground rhizomes in paleosols: The hidden half of an Early Devonian vascular plant Jinzhuang Xuea,b,1, Zhenzhen Denga, Pu Huanga, Kangjun Huanga, Michael J. Bentonc, Ying Cuid, Deming Wanga, Jianbo Liua, Bing Shena, James F. Basingere, and Shougang Haoa aThe Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, People’s Republic of China; bKey Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China; cSchool of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom; dDepartment of Earth Sciences, Dartmouth College, Hanover, NH 03755; and eDepartment of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada Edited by Donald E. Canfield, Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, Odense M., Denmark, and approved June 28, 2016 (received for review March 28, 2016) The colonization of terrestrial environments by rooted vascular because of a poor fossil record, it remains quite unclear how the plants had far-reaching impacts on the Earth system. However, “hidden half” ecosystem (24), with buried structures growing in soils, the belowground structures of early vascular plants are rarely functioned during the early stage of vascular plant radiation. Such a documented, and thus the plant−soil interactions in early terres- knowledge gap hinders a deep understanding of the ecology of early trial ecosystems are poorly understood. Here we report the earli- plants and their roles in terrestrial environments. est rooted paleosols (fossil soils) in Asia from Early Devonian In this article, we report well-preserved plant traces from the deposits of Yunnan, China. -
PLANT SCIENCE Bulletin Summer 2013 Volume 59 Number 2
PLANT SCIENCE Bulletin Summer 2013 Volume 59 Number 2 1st Place Triarch Botanical Images Student Travel Awards Ricardo Kriebel The New York Botanical Garden Flower of Miconia arboricola (Melastomataceae: Miconieae) in late anthesis In This Issue.............. Dr. Thomas Ranker and The BSA awards many for their PLANTS Recipients excel in others elected to serve the contributions.....p. 36 botany ......p. 15 BSA.....p. 35 From the Editor PLANT SCIENCE Every year this is one of my favorite issues of BULLETIN Plant Science Bulletin because we get to recognize Editorial Committee the accomplishments of some of our most worthy Volume 59 members. The Merit Awardees have been elected to the most select group of professional botanists in North America. Begun at the Fiftieth Anniversary Elizabeth Schussler (2013) meeting, 55 years ago, the Merit Award recognizes Department of Ecology & individuals for their outstanding contributions to the Evolutionary Biology mission of the Botanical Society. These are people University of Tennessee whose names we recognize from their publications, Knoxville, TN 37996-1610 presentations, and service to the society. They are [email protected] leaders at their own institutions, in the Botanical Society and in other scientific organizations. What I find more interesting, though, are the younger members being recognized for their Christopher Martine potential. These are graduate students beginning (2014) to make their mark in botanical research and being Department of Biology invested with the opportunity to help direct the Bucknell University evolution of the Society. They are also undergraduates Lewisburg, PA 17837 being recognized by their mentors for their initiative, [email protected] enthusiasm and drive to make discoveries and share their love of plants with others. -
A Palaeobotanical Pot-Pourri
A PALAEOBOTANICAL POT-POURRI Abstract This study, the third in the series of virtual issues of Palaeontology , examines the contributions the journal has made to the field of palaeobotany from 1961 onwards. I offer a personal selection of six papers repres enting four decades of research, with a range of specific geographical (Canada, Australia, China), temporal (Mesozoic, Devonian, Silurian) or more general (cycads, palynology, stratigraphy) focus. Key words Palaeobotany, palynology, cycads, early land plants, Devonian, Silurian A quick flick through the archive of all 57 volumes of Palaeontology proved not that onerous as there were relatively few palaeobotanical contributions, but producing a short list was mind-numbing. As compensation on the entertain ment side, my selection is a fossil plant equivalent of Desert Island Discs (for those not devotees of BBC Radio 4, this is the programme in which famous people select eight pieces of music they would wish to listen to when marooned on a desert island). Thus, here a scientific theme is replaced by a personal one. My choice includes papers by giants in their fields for which I have a very high regard, on subjects of interest to my own research area (early land plants) and even one on which I am a co-author (see Table 1) . I would not go as far as pianist Moura Limpany’s selection of all eight of her own recordings. I begin with Professor Tom Harris ’ presidential address on fossil cycads (Harris 1961). Professor Harris was the most influential Mesozoic pal aeobotanist of his generation and my PhD external examiner. -
The Classification of Early Land Plants-Revisited*
The classification of early land plants-revisited* Harlan P. Banks Banks HP 1992. The c1assificalion of early land plams-revisiled. Palaeohotanist 41 36·50 Three suprageneric calegories applied 10 early land plams-Rhyniophylina, Zoslerophyllophytina, Trimerophytina-proposed by Banks in 1968 are reviewed and found 10 have slill some usefulness. Addilions 10 each are noted, some delelions are made, and some early planls lhal display fealures of more lhan one calegory are Sel aside as Aberram Genera. Key-words-Early land-plams, Rhyniophytina, Zoslerophyllophytina, Trimerophytina, Evolulion. of Plant Biology, Cornell University, Ithaca, New York-5908, U.S.A. 14853. Harlan P Banks, Section ~ ~ ~ <ltm ~ ~-~unR ~ qro ~ ~ ~ f~ 4~1~"llc"'111 ~-'J~f.f3il,!"~, 'i\'1f~()~~<1I'f'I~tl'1l ~ ~1~il~lqo;l~tl'1l, 1968 if ~ -mr lfim;j; <fr'f ~<nftm~~Fmr~%1 ~~ifmm~~-.mtl ~if-.t~m~fuit ciit'!'f.<nftmciit~%1 ~ ~ ~ -.m t ,P1T ~ ~~ lfiu ~ ~ -.t 3!ftrq; ~ ;j; <mol ~ <Rir t ;j; w -.m tl FIRST, may I express my gratitude to the Sahni, to survey briefly the fate of that Palaeobotanical Sociery for the honour it has done reclassification. Several caveats are necessary. I recall me in awarding its International Medal for 1988-89. discussing an intractable problem with the late great May I offer the Sociery sincere thanks for their James M. Schopf. His advice could help many consideration. aspiring young workers-"Survey what you have and Secondly, may I join in celebrating the work and write up that which you understand. The rest will the influence of Professor Birbal Sahni. The one time gradually fall into line." That is precisely what I did I met him was at a meeting where he was displaying in 1968. -
Pteridophytic Diversity in Human-Inhabited Buffer Zone of Murlen National Park, Mizoram, India
13 2 2081 the journal of biodiversity data 3 April 2017 Check List LISTS OF SPECIES Check List 13(2): 2081, 3 April 2017 doi: https://doi.org/10.15560/13.2.2081 ISSN 1809-127X © 2017 Check List and Authors Pteridophytic diversity in human-inhabited buffer zone of Murlen National Park, Mizoram, India Sachin Sharma1, Bhupendra S. Kholia1, 4, Ramesh Kumar2 & Amit Kumar3 1 Botanical Survey of India, Northern Regional Centre, Dehradun 248 195, Uttarakhand, India 2 Botanical Survey of India, Arid Zone Regional Centre, Jodhpur 342 008, Rajasthan, India 3 Wildlife Institute of India, P.O. Box #18, Chandrabani, Dehradun 248 001, Uttarakhand, India 4 Corresponding author. E-mail: [email protected] Abstract: A taxonomic inventorization of pteridophytes (Kholia 2014). Generally, it is believed that modern ferns occurring in a human inhabited buffer zone of Murlen and their allies are much older than flowering plants, and National Park, India, was conducted in 2012 and 2013. often considered as living fossils, but except for a few This survey revealed 35 species belonging to 27 genera families, most of the modern ferns evolved and flourished and 15 families. Polypodiaceae was recorded as dominant under the shadow of angiosperms (Smith et al. 2006). family, represented by six genera and eight species, In India, pteridophytes are mainly distributed in Hima- followed by Pteridaceae (three genera and six species) layan region, as well as North-Eastern and Southern India, and Lycopodiaceae (three genera and four species). Of the where climates are humid and more conducive for growth. recorded species, 23 species were terrestrial, 11 (epiphytic) Approximately 1,267 species of pteridophytes (ca. -
Devonian As a Time of Major Innovation in Plants and Their Communities
1 Back to the Beginnings: The Silurian- 2 Devonian as a Time of Major Innovation 15 3 in Plants and Their Communities 4 Patricia G. Gensel, Ian Glasspool, Robert A. Gastaldo, 5 Milan Libertin, and Jiří Kvaček 6 Abstract Silurian, with the Early Silurian Cooksonia barrandei 31 7 Massive changes in terrestrial paleoecology occurred dur- from central Europe representing the earliest vascular 32 8 ing the Devonian. This period saw the evolution of both plant known, to date. This plant had minute bifurcating 33 9 seed plants (e.g., Elkinsia and Moresnetia), fully lami- aerial axes terminating in expanded sporangia. Dispersed 34 10 nate∗ leaves and wood. Wood evolved independently in microfossils (spores and phytodebris) in continental and 35AU2 11 different plant groups during the Middle Devonian (arbo- coastal marine sediments provide the earliest evidence for 36 12 rescent lycopsids, cladoxylopsids, and progymnosperms) land plants, which are first reported from the Early 37 13 resulting in the evolution of the tree habit at this time Ordovician. 38 14 (Givetian, Gilboa forest, USA) and of various growth and 15 architectural configurations. By the end of the Devonian, 16 30-m-tall trees were distributed worldwide. Prior to the 17 appearance of a tree canopy habit, other early plant groups 15.1 Introduction 39 18 (trimerophytes) that colonized the planet’s landscapes 19 were of smaller stature attaining heights of a few meters Patricia G. Gensel and Milan Libertin 40 20 with a dense, three-dimensional array of thin lateral 21 branches functioning as “leaves”. Laminate leaves, as we We are now approaching the end of our journey to vegetated 41 AU3 22 now know them today, appeared, independently, at differ- landscapes that certainly are unfamiliar even to paleontolo- 42 23 ent times in the Devonian. -
Research Article Components and Anti-Hepg2 Activity Comparison of Lycopodium Alkaloids from Four Geographic Origins
Hindawi Publishing Corporation Evidence-Based Complementary and Alternative Medicine Volume 2016, Article ID 4631843, 9 pages http://dx.doi.org/10.1155/2016/4631843 Research Article Components and Anti-HepG2 Activity Comparison of Lycopodium Alkaloids from Four Geographic Origins Yong-Qiang Tian,1,2 Guang-Wan Hu,1,3 and Ming-Quan Guo1,3 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China Correspondence should be addressed to Ming-Quan Guo; [email protected] Received 6 November 2015; Revised 2 February 2016; Accepted 3 February 2016 Academic Editor: Raffaele Capasso Copyright © 2016 Yong-Qiang Tian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Lycopodium japonicum Thunb. has attracted great interests due to its rich alkaloids with significant anticancer activity. However, significant chemical differences often exist in a plant species from different geographic origins and affect its quality and bioactivities. Thus, it is urgent to reveal their chemical and biological distinctions at the molecular level. In this context, a comparative chemical analysis of LAs using HPLC-UV-ESI-MS/MS was firstly conducted and resulted in the detection of 46 LAs, 28 of which were identified, and a series of unique LAs markers, such as peaks 2, 9, 10,and11, were further found to be characteristic LAs and selected as markers from four different origins for their quality control.