Lytton John Musselman Curriculum Vitae December 2011
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Chromosome Numbers in Gymnosperms - an Update
Rastogi and Ohri . Silvae Genetica (2020) 69, 13 - 19 13 Chromosome Numbers in Gymnosperms - An Update Shubhi Rastogi and Deepak Ohri Amity Institute of Biotechnology, Research Cell, Amity University Uttar Pradesh, Lucknow Campus, Malhaur (Near Railway Station), P.O. Chinhat, Luc know-226028 (U.P.) * Corresponding author: Deepak Ohri, E mail: [email protected], [email protected] Abstract still some controversy with regard to a monophyletic or para- phyletic origin of the gymnosperms (Hill 2005). Recently they The present report is based on a cytological data base on 614 have been classified into four subclasses Cycadidae, Ginkgoi- (56.0 %) of the total 1104 recognized species and 82 (90.0 %) of dae, Gnetidae and Pinidae under the class Equisetopsida the 88 recognized genera of gymnosperms. Family Cycada- (Chase and Reveal 2009) comprising 12 families and 83 genera ceae and many genera of Zamiaceae show intrageneric unifor- (Christenhusz et al. 2011) and 88 genera with 1104 recognized mity of somatic numbers, the genus Zamia is represented by a species according to the Plant List (www.theplantlist.org). The range of number from 2n=16-28. Ginkgo, Welwitschia and Gen- validity of accepted name of each taxa and the total number of tum show 2n=24, 2n=42, and 2n=44 respectively. Ephedra species in each genus has been checked from the Plant List shows a range of polyploidy from 2x-8x based on n=7. The (www.theplantlist.org). The chromosome numbers of 688 taxa family Pinaceae as a whole shows 2n=24except for Pseudolarix arranged according to the recent classification (Christenhusz and Pseudotsuga with 2n=44 and 2n=26 respectively. -
ED45E Rare and Scarce Species Hierarchy.Pdf
104 Species 55 Mollusc 8 Mollusc 334 Species 181 Mollusc 28 Mollusc 44 Species 23 Vascular Plant 14 Flowering Plant 45 Species 23 Vascular Plant 14 Flowering Plant 269 Species 149 Vascular Plant 84 Flowering Plant 13 Species 7 Mollusc 1 Mollusc 42 Species 21 Mollusc 2 Mollusc 43 Species 22 Mollusc 3 Mollusc 59 Species 30 Mollusc 4 Mollusc 59 Species 31 Mollusc 5 Mollusc 68 Species 36 Mollusc 6 Mollusc 81 Species 43 Mollusc 7 Mollusc 105 Species 56 Mollusc 9 Mollusc 117 Species 63 Mollusc 10 Mollusc 118 Species 64 Mollusc 11 Mollusc 119 Species 65 Mollusc 12 Mollusc 124 Species 68 Mollusc 13 Mollusc 125 Species 69 Mollusc 14 Mollusc 145 Species 81 Mollusc 15 Mollusc 150 Species 84 Mollusc 16 Mollusc 151 Species 85 Mollusc 17 Mollusc 152 Species 86 Mollusc 18 Mollusc 158 Species 90 Mollusc 19 Mollusc 184 Species 105 Mollusc 20 Mollusc 185 Species 106 Mollusc 21 Mollusc 186 Species 107 Mollusc 22 Mollusc 191 Species 110 Mollusc 23 Mollusc 245 Species 136 Mollusc 24 Mollusc 267 Species 148 Mollusc 25 Mollusc 270 Species 150 Mollusc 26 Mollusc 333 Species 180 Mollusc 27 Mollusc 347 Species 189 Mollusc 29 Mollusc 349 Species 191 Mollusc 30 Mollusc 365 Species 196 Mollusc 31 Mollusc 376 Species 203 Mollusc 32 Mollusc 377 Species 204 Mollusc 33 Mollusc 378 Species 205 Mollusc 34 Mollusc 379 Species 206 Mollusc 35 Mollusc 404 Species 221 Mollusc 36 Mollusc 414 Species 228 Mollusc 37 Mollusc 415 Species 229 Mollusc 38 Mollusc 416 Species 230 Mollusc 39 Mollusc 417 Species 231 Mollusc 40 Mollusc 418 Species 232 Mollusc 41 Mollusc 419 Species 233 -
An Account of Orobanche L. in Britain and Ireland
Watsonia, 18, 257-295 (1991) 257 An accountof OrobancheL. in Britain and Ireland J. RUMSEY and S. L. JURY Departmentof Botany, Universityof Reading,P.O. Box 221,Reading, Berkshire, RG6 2AS ABSTRACT Morphological descriptions are given of the 14 speciesof Orobanche (Orobanchaceae) recorded in the British Isles, together with separate keys for identifying fresh material and herbarium specimens. Accounts of the history of the speciesare presented together with illustrations and distribution maps. The variation in Orobanche minor is accounted for with the recognition of four varieties. INTRODUcnON ..,,; . The genus Orobanche is renowned as a taxonomically very difficult one. In most casesthis is a result of many of the useful charactersbecoming lost on drying, and the lack of adequate field notes. Plants which are very distinct in the field become reduced to a hideous brown uniformity when pressed. Therefore, herbarium specimens are often incorrectly determined (an average of 5-10% in fact). The loss of characters on drying, considerable intra-specific variation, confusing synonymies, incorrectly cited names and badly described specieswith poor types (often with different specieson the same sheet) have done little to generate interest in the genus. Too many botanists have shown a reluctance to deal with this genusin herbaria, perpetuating the myth that the speciesare impossible to identify once dried. Certainly, Orobanche minor Sm. and its close relatives often cannot be positively determined without descriptive notes made at the time of gathering, but all other species from the British Isles are distinct enough not to need any additional information. It is hoped that this account will stimulate other botanists to study, identify and record members of this fascinating parasitic genus in Britain and Ireland, as well as clear up some errors and confusions made in the past. -
Invisible Connections: Introduction to Parasitic Plants Dr
Invisible Connections: Introduction to Parasitic Plants Dr. Vanessa Beauchamp Towson University What is a parasite? • An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense. Symbiosis https://www.superpharmacy.com.au/blog/parasites-protozoa-worms-ectoparasites Food acquisition in plants: Autotrophy Heterotrophs (“different feeding”) • True parasites: obtain carbon compounds from host plants through haustoria. • Myco-heterotrophs: obtain carbon compounds from host plants via Image Credit: Flickr User wackybadger, via CC mycorrhizal fungal connection. • Carnivorous plants (not parasitic): obtain nutrients (phosphorus, https://commons.wikimedia.org/wiki/File:Pin nitrogen) from trapped insects. k_indian_pipes.jpg http://www.welivealot.com/venus-flytrap- facts-for-kids/ Parasite vs. Epiphyte https://chatham.ces.ncsu.edu/2014/12/does-mistletoe-harm-trees-2/ By © Hans Hillewaert /, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=6289695 True Parasitic Plants • Gains all or part of its nutrition from another plant (the host). • Does not contribute to the benefit of the host and, in some cases, causing extreme damage to the host. • Specialized peg-like root (haustorium) to penetrate host plants. https://www.britannica.com/plant/parasitic-plant https://chatham.ces.ncsu.edu/2014/12/does-mistletoe-harm-trees-2/ Diversity of parasitic plants Eudicots • Parasitism has evolved independently at least 12 times within the plant kingdom. • Approximately 4,500 parasitic species in Monocots 28 families. • Found in eudicots and basal angiosperms • 1% of the dicot angiosperm species • No monocot angiosperm species Basal angiosperms Annu. Rev. Plant Biol. 2016.67:643-667 True Parasitic Plants https://www.alamy.com/parasitic-dodder-plant-cuscuta-showing-penetration-parasitic-haustor The defining structural feature of a parasitic plant is the haustorium. -
Intriguing World of Weeds Orobanche-The Broomrapes1
Intriguing World of Weeds Orobanche-The Broomrapes1 LARRY W. MIT1CH2 INTRODUCTION other early botanists. Broomrape first appeared in En!! Orobanchaceae, the broomrape family, comprises ap lish in Dodoens, "a new herbal or historie of plants" :is proximately 150 species in. 17 genera. Four genera translated from the French by Henry Lyte (1529?-1607) represented by four species occur in and published in 1578. Wrote he, "That excrescence the southeastern U.S. (21). A comming from the roote of Broome is called in Latine majority of the genera and about Ragum Genistae, that is to say Broome Rape" (20). 90% of the species in Oroban Cattle and sheep graze broomrape shoots with impu chaceae are Old World natives. The nity. However, the seeds pass unharmed through their family is primarily'one of the north alimentary tracts and can infest tobacco plants (9). ern warm and temperate zones. Indiscriminate grazing in infested fields disseminates the parasite. Only about 10% of the species oc cur in the tropics; only one species reaches the arctic (21). ECONOMIC IMPORTANCE A few species in Orobanchaceae are used in folk Broomrape-infested crops result in great economi-: medicine (21). Several Old World species are widely losses in southern Europe, particularly to beans distributed weeds. The genus Orobanche accommodates (Phaseolus sp.) in Italy. In the U.S., broomrape causes about 60 species of unbranched parasitic herbs, without considerable yield losses in tobacco, clover, tomatoes chlorophyll (21). The broomrapes are variable in color, (Lycopersicon esculentum Mill.), sunflowers (Helian ranging from yellowish-brown and reddish-violet to thus annuus L.), and broad beans (Vicia faba L.). -
Pollination Drop in Relation to Cone Morphology in Podocarpaceae: a Novel Reproductive Mechanism Author(S): P
Pollination Drop in Relation to Cone Morphology in Podocarpaceae: A Novel Reproductive Mechanism Author(s): P. B. Tomlinson, J. E. Braggins, J. A. Rattenbury Source: American Journal of Botany, Vol. 78, No. 9 (Sep., 1991), pp. 1289-1303 Published by: Botanical Society of America Stable URL: http://www.jstor.org/stable/2444932 . Accessed: 23/08/2011 15:47 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Botanical Society of America is collaborating with JSTOR to digitize, preserve and extend access to American Journal of Botany. http://www.jstor.org AmericanJournal of Botany 78(9): 1289-1303. 1991. POLLINATION DROP IN RELATION TO CONE MORPHOLOGY IN PODOCARPACEAE: A NOVEL REPRODUCTIVE MECHANISM' P. B. TOMLINSON,2'4 J. E. BRAGGINS,3 AND J. A. RATTENBURY3 2HarvardForest, Petersham, Massachusetts 01366; and 3Departmentof Botany, University of Auckland, Auckland, New Zealand Observationof ovulatecones at thetime of pollinationin the southernconiferous family Podocarpaceaedemonstrates a distinctivemethod of pollencapture, involving an extended pollinationdrop. Ovules in all generaof the family are orthotropousand singlewithin the axil of each fertilebract. In Microstrobusand Phyllocladusovules are-erect (i.e., the micropyle directedaway from the cone axis) and are notassociated with an ovule-supportingstructure (epimatium).Pollen in thesetwo genera must land directly on thepollination drop in theway usualfor gymnosperms, as observed in Phyllocladus.In all othergenera, the ovule is inverted (i.e., the micropyleis directedtoward the cone axis) and supportedby a specializedovule- supportingstructure (epimatium). -
Methods for Measuring Frost Tolerance of Conifers: a Systematic Map
Review Methods for Measuring Frost Tolerance of Conifers: A Systematic Map Anastasia-Ainhoa Atucha Zamkova *, Katherine A. Steele and Andrew R. Smith School of Natural Sciences, Bangor University, Bangor LL57 2UW, Gwynedd, UK; [email protected] (K.A.S.); [email protected] (A.R.S.) * Correspondence: [email protected] Abstract: Frost tolerance is the ability of plants to withstand freezing temperatures without unrecov- erable damage. Measuring frost tolerance involves various steps, each of which will vary depending on the objectives of the study. This systematic map takes an overall view of the literature that uses frost tolerance measuring techniques in gymnosperms, focusing mainly on conifers. Many different techniques have been used for testing, and there has been little change in methodology since 2000. The gold standard remains the field observation study, which, due to its cost, is frequently substituted by other techniques. Closed enclosure freezing tests (all non-field freezing tests) are done using various types of equipment for inducing artificial freezing. An examination of the literature indicates that several factors have to be controlled in order to measure frost tolerance in a manner similar to observation in a field study. Equipment that allows controlling the freezing rate, frost exposure time and thawing rate would obtain results closer to field studies. Other important factors in study design are the number of test temperatures used, the range of temperatures selected and the decrements between the temperatures, which should be selected based on expected frost tolerance of the tissue and species. Citation: Atucha Zamkova, A.-A.; Steele, K.A.; Smith, A.R. -
Gymnosperms on the EDGE Félix Forest1, Justin Moat 1,2, Elisabeth Baloch1, Neil A
www.nature.com/scientificreports OPEN Gymnosperms on the EDGE Félix Forest1, Justin Moat 1,2, Elisabeth Baloch1, Neil A. Brummitt3, Steve P. Bachman 1,2, Stef Ickert-Bond 4, Peter M. Hollingsworth5, Aaron Liston6, Damon P. Little7, Sarah Mathews8,9, Hardeep Rai10, Catarina Rydin11, Dennis W. Stevenson7, Philip Thomas5 & Sven Buerki3,12 Driven by limited resources and a sense of urgency, the prioritization of species for conservation has Received: 12 May 2017 been a persistent concern in conservation science. Gymnosperms (comprising ginkgo, conifers, cycads, and gnetophytes) are one of the most threatened groups of living organisms, with 40% of the species Accepted: 28 March 2018 at high risk of extinction, about twice as many as the most recent estimates for all plants (i.e. 21.4%). Published: xx xx xxxx This high proportion of species facing extinction highlights the urgent action required to secure their future through an objective prioritization approach. The Evolutionary Distinct and Globally Endangered (EDGE) method rapidly ranks species based on their evolutionary distinctiveness and the extinction risks they face. EDGE is applied to gymnosperms using a phylogenetic tree comprising DNA sequence data for 85% of gymnosperm species (923 out of 1090 species), to which the 167 missing species were added, and IUCN Red List assessments available for 92% of species. The efect of diferent extinction probability transformations and the handling of IUCN data defcient species on the resulting rankings is investigated. Although top entries in our ranking comprise species that were expected to score well (e.g. Wollemia nobilis, Ginkgo biloba), many were unexpected (e.g. -
Ecology and Distribution of the Malesian Podocarps Neal J
4 Ecology and Distribution of the Malesian Podocarps Neal J. Enright and Tanguy Jaffré ABSTRACT. Podocarp species and genus richness is higher in the Malesian region than anywhere else on earth, with maximum genus richness in New Guinea and New Caledo- nia and maximum species richness in New Guinea and Borneo. Members of the Podo- carpaceae occur across the whole geographic and altitudinal range occupied by forests and shrublands in the region. There is a strong tendency for podocarp dominance of vegetation to be restricted either to high- altitude sites close to the limit of tree growth or to other sites that might restrict plant growth in terms of water relations and nutri- ent supply (e.g., skeletal soils on steep slopes and ridges, heath forests, ultramafic parent material). Although some species are widespread in lowland forests, they are generally present at very low density, raising questions concerning their regeneration ecology and competitive ability relative to co- occurring angiosperm tree species. A number of species in the region are narrowly distributed, being restricted to single islands or mountain tops, and are of conservation concern. Our current understanding of the distribution and ecology of Malesian podocarps is reviewed in this chapter, and areas for further research are identified. INTRODUCTION The Malesian region has the highest diversity of southern conifers (i.e., Podocarpaceae and Araucariaceae) in the world (Enright and Hill, 1995). It is a large and heterogeneous area, circumscribing tropical and subtropical lowland to montane forest (and some shrubland) assemblages, extending from Tonga in Neal J. Enright, School of Environmental Science, the east to India in the west and from the subtropical forests of eastern Australia Murdoch University, Murdoch, Western Austra- in the south to Taiwan and Nepal in the north (Figure 4.1). -
Haustorium 50 Issue!
HAUSTORIUM 50 January 2007 1 HAUSTORIUM Parasitic Plants Newsletter Official Organ of the International Parasitic Plant Society 50th ISSUE! January 2007 Number 50 MESSAGE FROM THE IPPS PRESIDENT acquaintances between those interested in parasitic Dear IPPS Members, plants. The IPPS wishes you a happy festive season and a While the main reports during the early years of peaceful and happy 2007. We all wish that the New Haustorium were on taxonomic, anatomical and Year will bring a better understanding of parasitic physiological aspects of parasitic plants, the recent plants, and new breakthroughs in our ability to control issues also report on significant progress in molecular parasitic weeds. research of parasitic plants, with emphasis on three In addition to celebrating the birth of a new year, we main areas: (a) genome studies of parasitic plants, are also happily celebrating the issue of the 50th including evolutionary, genetic and physiological edition of Haustorium, the well established considerations; (b) the development of new resistances Newsletter of the parasitic plant research community. It against parasitic weeds either directly by genetic is my pleasure to send our special thanks and engineering or indirectly by the employment of appreciation to the dedicated founding Editors of herbicide resistance; and (c) the development of Haustorium and honorary members of the IPPS, Chris molecular markers for diagnostic purposes, and for Parker and Lytton Musselman, for their immense marker-assisted selection, serving more efficient long lasting contribution in distributing updated breeding of various crops for resistance against knowledge on parasitic plants to all parts of the world, parasitic weeds. gathering pieces of information on a variety of aspects Another encouraging development of the last decade is of parasitic plant biology and on the management of the availability of a number of effective means for the parasitic weeds, for the benefit of us all. -
Distribution and Ecology of the Conifers of New Caledonia
I 1 extrait de : EGOLQGY OP THE SOUTHERN CONIFERS Edited by : Neal J. ENRIGHT and Robert S. HILL MELBOW WVERSITY PRESS - 1935 5. - I Distribution and Ecology 8 of the Conifers of - New Caledonia T. JAFFRÉ ESPITE ITS small area (19 O00 km2) New Caledonia possesses a rich and distinctive flora, totalling 3000 species of phanerogams of which 75 to 80 per cent are endemic. Among these are 43 conifers (all endemic) belonging D (1 to four families: Taxaceae (one sp.), Podocarpaceae (18 spp.), Araucariaceae 8 spp.), Cupressaceae (six spp.). \ The sole species of the family Taxaceae belongs to the endemic genus Austrotaxus. The Podocarpaceae is divided among eight genera: Podocarpus (seven ii spp.), Dacrydium (four spp.), Retrophyllum (twospp.), Falcatifolium, Dacrycarpus, Acmopyb, Prumnopitys and Parasitaxus (one sp. each), the last being endemic to New Caledonia (Page 1988). The Araucariaceae comprises two genera, Araucaria (13 spp.) and Agathis (five spp.), and the Cupressaceae the genera Libocedrus (three spp.), Callitris (two spp.), and the monotypic and endemic Neocallitropsis (de Laubenfels 1972). No other region of the world with such a small area possesses such a rich and distinctive conifer flora. Growth forms The majority of New Caledonian conifers are tall trees but there are also small trees and shrubs. The Araucariaceae, all arborescent, includes nine species exploited for their timber (Agatbis corbassonii, A. lanceolata, A. moorei, A. ovata, Araucaria columnaris, A. bernieri, A. laubenfelsii, A. luxurians, A. subulata). The Agatbis species are among the most massive forest trees; some individuals I of the tallest species, Agatbis lanceolata, have trunks more than 2.5 m in diameter and attain a height of 30-40 m. -
An Account of Common Broomrape Orobanche Minor (Orobanchaceae) in the British Isles
British & Irish Botany 2(3): 223-239, 2020 An account of Common Broomrape Orobanche minor (Orobanchaceae) in the British Isles C.J. Thorogood1,2*, Fred Rumsey3 1University of Oxford Botanic Garden, Oxford, UK; 2Department of Plant Sciences, University of Oxford, Oxford, UK; 3Natural History Museum, London, UK. *Corresponding author: Chris Thorogood: [email protected] This pdf constitutes the Version of Record published on 31st August 2020 Abstract Common broomrape (Orobanche minor Sm.) is the most widespread and variable species in the British Isles and is the subject of much taxonomic confusion. Poor preservation in herbaria, coupled with the presence of cryptic host-specific races, have contributed to this. Here we review the taxonomic status of infraspecific taxa of O. minor in the British Isles, and provide a revised identification key, informed by morphology, ecology and molecular data. We describe two new varieties of O. minor s.l. that are ecologically distinct and discuss within the broader context of cryptic taxa in the subsection Minores (Beck-Mannagetta) Teryokhin in the British Isles and continental Europe. We suggest that delineating taxa objectively and reliably will be important for informing conservation priorities. Host identity and ecology, besides morphology, are essential considerations when identifying infraspecific taxa in this taxonomically challenging species. Keywords: Taxonomy; host race; parasitic plant Introduction Broomrapes (genus Orobanche L.) are renowned for being taxonomically challenging. Many of the characters useful for identification, for example stigma and corolla colour, are lost upon drying. Coupled with inadequate field notes, herbarium specimens are often determined incorrectly (Rumsey & Jury, 1991). Of the 14 species that occur in the British Isles, common broomrape (Orobanche minor Sm.) is the most widespread and variable (Figs.