Late-Acting Self-Incompatible System, Preferential Allogamy and Delayed Selfing in The
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Variation in Seed Production and Germination in 22 Rare and Threatened Western Australian Verticordia (Myrtaceae)
Journal of the Royal Society of Western Australia, 84:103-110, 2001 Variation in seed production and germination in 22 rare and threatened Western Australian Verticordia (Myrtaceae) A Cochrane1, K Brown2, S Cunneen3 & A Kelly4 1Threatened Flora Seed Centre, Department of Conservation and Land Management, Locked Bag 104, Bentley Delivery Centre, Perth WA 6983 2Environmental Weeds Action Network, 108 Adelaide Terrace, East Perth WA 6000 3CSIRO Centre for Mediterranean Agricultural Research, Floreat WA 6014 424 Carnarvon St, East Victoria Park WA 6100 email: [email protected] Manuscript received August 2000, accepted March 2001 Abstract This study investigates the reproductive potential of 22 rare and threatened Western Australian taxa in the genus Verticordia (Myrtaceae) over a 5-year period. Considerable inter- and intra-specific variation in both seed production and germinability was demonstrated for the majority of taxa. The seed to flower ratio, or “seed set”, ranged from 0% to 68% with an overall mean of 21% in 82 accessions representing seed from 48 populations of the 22 taxa. Percentage germination ranged from 7% to 100% with an average of 49% for 68 accessions. The precariously low annual reproductive capacity of some of the more restricted and critically endangered taxa threatens their survival and unexpected disturbance events may result in population decline or even localised extinction. Mitigation measures such as the reintroduction of plant material into new sites and the enhancement of existing populations through additional plantings may be warranted for many of Western Australia’s rare and threatened Verticordia. Keywords: Verticordia, seed production, germination Introduction prominently displayed feathery flowers are borne singly but appear as heads or spikes and are generally brightly Verticordia (family Myrtaceae, sub-family coloured, ranging from yellow to red to purple. -
Thryptomene Micrantha (Ribbed Heathmyrtle)
Listing Statement for Thryptomene micrantha (ribbed heathmyrtle) Thryptomene micrantha ribbed heathmyrtle T A S M A N I A N T H R E A T E N E D F L O R A L I S T I N G S T A T E M E N T All i mage s by Richard Schahinger Scientific name: Thryptomene micrantha Hook.f., J. Bot. Kew Gard. (Hooker) 5: 299, t.8 (1853) Common Name: ribbed heathmyrtle (Wapstra et al. 2005) Group: vascular plant, dicotyledon, family Myrtaceae Status: Threatened Species Protection Act 1995 : vulnerable Environment Protection and Biodiversity Conservation Act 1999 : Not Listed Distribution: Endemic status: Not endemic to Tasmania Tasmanian NRM Region: South Figure 1 . Distribution of Thryptomene micrantha in Plate 1. Thryptomene micrantha in flower Tasmania 1 Threatened Species Section – Department of Primary Industries, Parks, Water & Environment Listing Statement for Thryptomene micrantha (ribbed heathmyrtle) IDENTIFICATION & ECOLOGY Thryptomene micrantha is a small shrub in the Myrtaceae family (Curtis & Morris 1975), known in Tasmania from the central east where it grows in near-coastal heathy woodlands on granite-derived sands. Flowering may occur from mid winter through to early summer. Beardsell et al. (1993a & b) noted that Thryptomene species tend to shed their fruit each year within 6 to 18 weeks of flowering, with at least two years ageing and weathering required before a seed’s initial dormancy is broken. Dormancy was found to be due largely to the action of the seed coat acting as a barrier to water uptake, with the surrounding fruit having a smaller inhibitory effect. -
Vestured Pits in Wood of Onagraceae: Correlations with Ecology, Habit, and Phylogeny1
VESTURED PITS IN WOOD OF Sherwin Carlquist2 and Peter H. Raven3 ONAGRACEAE: CORRELATIONS WITH ECOLOGY, HABIT, AND PHYLOGENY1 ABSTRACT All Onagraceae for which data are available have vestured pits on vessel-to-vessel pit pairs. Vestures may also be present in some species on the vessel side of vessel-to-ray pit pairs. Herbaceous Onagraceae do not have fewer vestures, although woods with lower density (Circaea L. and Oenothera L.) have fewer vestures. Some Onagraceae from drier areas tend to have smaller vessel pits, and on that account may have fewer vestures (Epilobium L. and Megacorax S. Gonz´alez & W. L. Wagner). Pit apertures as seen on the lumen side of vessel walls are elliptical, occasionally oval, throughout the family. Vestures are predominantly attached to pit aperture margins. As seen from the outer surfaces of vessels, vestures may extend across the pit cavities. Vestures are usually absent or smaller on the distal portions of pit borders (except for Ludwigia L., which grows consistently in wet areas). Distinctive vesture patterns were observed in the several species of Lopezia Cav. and in Xylonagra Donn. Sm. & Rose. Vestures spread onto the lumen-facing vessel walls of Ludwigia octovalvis (Jacq.) P. H. Raven. Although the genera are presented here in the sequence of a recent molecular phylogeny of Onagraceae, ecology and growth forms are more important than evolutionary relationships with respect to abundance, degree of grouping, and morphology of vestured pits. Designation of vesture types is not warranted based on the distribution of named types in Onagraceae and descriptive adjectives seem more useful, although more data on vesturing in the family are needed before patterns of diversity and their extent can be fully ascertained. -
Reproductive Biology of Faidherbia Albida (Del.) A. Chev
Silva Fennica 37(4) research articles Reproductive Biology of Faidherbia albida (Del.) A. Chev. Yaye Kène Gassama-Dia, Djibril Sané and Mansor N’Doye Gassama-Dia, Y.K., Sané, D. & N’Doye, M. 2003. Reproductive biology of Faidherbia albida (Del.) A. Chev. Silva Fennica 37(4): 429–436. Phenology, fl owering and fructifi cation were studied in 5 natural populations of Faid- herbia albida in a semi-arid zone in Senegal. In this species, the infl orescence acts as the reproductive unit; the basal fl owers, opening fi rst, have a low rate of fertilisation; the maximum rate of fertilisation (65%) was obtained in the apical fl owers. Stigmatic receptivity, tested by esterasic reaction, was maximal immediately after anthesis. Stigmata of F. albida can bear simultaneously 2 or 3 polyads. Controlled pol- lination revealed that allogamy is the dominant reproductive system (ISI = 0.2) in natural populations of F. albida. Intra-specifi c variability in selfi ng (ISI ranging from 0 to 0.54) was also observed. Despite of the complete reproductive mechanism during fl owering, only a small number of ripe pods (1.25%) is produced, and an average of 70% of the ovules per carpel are fertilized. Keywords Faidherbia albida, fl owering, fructifi cation, polyad, allogamy, selfi ng Authors´ address Université Cheikh Anta Diop de Dakar, Faculté des Sciences et Techniques, Département de biologie végétale, Dakar, Sénégal E-mail [email protected] Received 1 September 2000 Accepted 7 July 2003 1 Introduction Development of any programme of tree breeding needs study of the pollination strategy Faidherbia albida (Del.) A. -
Hypericaceae) Heritiana S
University of Missouri, St. Louis IRL @ UMSL Dissertations UMSL Graduate Works 5-19-2017 Systematics, Biogeography, and Species Delimitation of the Malagasy Psorospermum (Hypericaceae) Heritiana S. Ranarivelo University of Missouri-St.Louis, [email protected] Follow this and additional works at: https://irl.umsl.edu/dissertation Part of the Botany Commons Recommended Citation Ranarivelo, Heritiana S., "Systematics, Biogeography, and Species Delimitation of the Malagasy Psorospermum (Hypericaceae)" (2017). Dissertations. 690. https://irl.umsl.edu/dissertation/690 This Dissertation is brought to you for free and open access by the UMSL Graduate Works at IRL @ UMSL. It has been accepted for inclusion in Dissertations by an authorized administrator of IRL @ UMSL. For more information, please contact [email protected]. Systematics, Biogeography, and Species Delimitation of the Malagasy Psorospermum (Hypericaceae) Heritiana S. Ranarivelo MS, Biology, San Francisco State University, 2010 A Dissertation Submitted to The Graduate School at the University of Missouri-St. Louis in partial fulfillment of the requirements for the degree Doctor of Philosophy in Biology with an emphasis in Ecology, Evolution, and Systematics August 2017 Advisory Committee Peter F. Stevens, Ph.D. Chairperson Peter C. Hoch, Ph.D. Elizabeth A. Kellogg, PhD Brad R. Ruhfel, PhD Copyright, Heritiana S. Ranarivelo, 2017 1 ABSTRACT Psorospermum belongs to the tribe Vismieae (Hypericaceae). Morphologically, Psorospermum is very similar to Harungana, which also belongs to Vismieae along with another genus, Vismia. Interestingly, Harungana occurs in both Madagascar and mainland Africa, as does Psorospermum; Vismia occurs in both Africa and the New World. However, the phylogeny of the tribe and the relationship between the three genera are uncertain. -
Ventura County Planning Division 2018 Locally Important Plant List
Ventura County Planning Division 2018 Locally Important Plant List Number of Scientific Name Common Name Habit Family Federal/State Status Occurrences in Source Ventura County Abronia turbinata Torr. ex S. Consortium of California Turbinate Sand-verbena A/PH Nyctaginaceae 2 Watson Herbaria Acanthoscyphus parishii var. abramsii (E.A. McGregor) Consortium of California Abrams' Oxytheca AH Polygonaceae CRPR 1B.2 4-5 Reveal [synonym: Oxytheca Herbaria parishii var. abramsii] Acanthoscyphus parishii Consortium of California Parish Oxytheca AH Polygonaceae CRPR 4.2 1 (Parry) Small var. parishii Herbaria Acmispon glaber var. Consortium of California brevialatus (Ottley) Brouillet Short Deerweed PH Fabaceae 1 Herbaria Acmispon heermannii Heermann Lotus or Consortium of California (Durand & Hilg.) Brouillet var. PH Fabaceae 4 Hosackia Herbaria heermannii Acmispon heermannii var. Roundleaf Heermann Consortium of California PH Fabaceae 1 orbicularis (A. Gray) Brouillet Lotus or Hosackia Herbaria Acmispon junceus (Bentham) Consortium of California Rush Hosackia AH Fabaceae 2 Brouillet var. junceus Herbaria 1 Locally Important Plant List- Dec. 2018 Number of Scientific Name Common Name Habit Family Federal/State Status Occurrences in Source Ventura County Acmispon micranthus (Torrey Consortium of California Grab Hosackia or Lotus AH Fabaceae 3 & A. Gray) Brouillet Herbaria Acmispon parviflorus Consortium of California Tiny Lotus AH Fabaceae 2 (Bentham) D.D. Sokoloff Herbaria Consortium of California Agrostis hallii Vasey Hall's Bentgrass PG Poaceae 1 Herbaria Common or Broadleaf Consortium of California Alisma plantago-aquaticum L. PH Alismataceae 4 Water-plantain Herbaria Consortium of California Allium amplectens Torrey Narrowleaf Onion PG Alliaceae 1 Herbaria Allium denticulatum (Traub) Consortium of California Dentate Fringed Onion PG Alliaceae 1 D. -
Flowers, Posts and Plates of Dirk Hartog Island
Flowers, Posts and Plates of Dirk Hartog Island Lesley Brooker FLOWERS POSTS AND PLATES January 2020 Home Flowers, Posts and Plates of Dirk Hartog Island Lesley Brooker For the latest revision go to https://lesmikebrooker.com.au/Dirk-Hartog-Island.php Please direct feedback to Lesley Brooker at [email protected] Home INTRODUCTION This document is in two parts:- Part 1 — FLOWERS is an interactive reference to some of the flora of Dirk Hartog Island. Plants are arranged alphabetically within families. Hyperlinks are provided for quick access to historical material found on-line. Attention is drawn (in the green boxes below the species accounts) to some features which may help identification or may interest the reader, but these are by no means diagnostic. Where technical terms are used, these are explained in parenthesis. The ultimate on-line authority on the Western Australian flora is FloraBase. It provides the most up-to-date nomenclature, details of subspecies, flowering periods and distribution maps. Please use this guide in conjunction with FloraBase. Part 2 — POSTS AND PLATES provides short historical accounts of some the people involved in erecting and removing posts and plates on Dirk Hartog Island between 1616 and 1907, and those who may have collected plants on the island during their visit. Home FLOWERS PHOTOGRAPHS REFERENCES BIRD LIST Home Flower Photos The plants are presented in alphabetical order within plant families - this is so that plants that are closely related to one another will be grouped together on nearby pages. All of the family names and genus names are given at the top of each page and are also listed in an index. -
Genera in Myrtaceae Family
Genera in Myrtaceae Family Genera in Myrtaceae Ref: http://data.kew.org/vpfg1992/vascplnt.html R. K. Brummitt 1992. Vascular Plant Families and Genera, Royal Botanic Gardens, Kew REF: Australian – APC http://www.anbg.gov.au/chah/apc/index.html & APNI http://www.anbg.gov.au/cgi-bin/apni Some of these genera are not native but naturalised Tasmanian taxa can be found at the Census: http://tmag.tas.gov.au/index.aspx?base=1273 Future reference: http://tmag.tas.gov.au/floratasmania [Myrtaceae is being edited at mo] Acca O.Berg Euryomyrtus Schaur Osbornia F.Muell. Accara Landrum Feijoa O.Berg Paragonis J.R.Wheeler & N.G.Marchant Acmena DC. [= Syzigium] Gomidesia O.Berg Paramyrciaria Kausel Acmenosperma Kausel [= Syzigium] Gossia N.Snow & Guymer Pericalymma (Endl.) Endl. Actinodium Schauer Heteropyxis Harv. Petraeomyrtus Craven Agonis (DC.) Sweet Hexachlamys O.Berg Phymatocarpus F.Muell. Allosyncarpia S.T.Blake Homalocalyx F.Muell. Pileanthus Labill. Amomyrtella Kausel Homalospermum Schauer Pilidiostigma Burret Amomyrtus (Burret) D.Legrand & Kausel [=Leptospermum] Piliocalyx Brongn. & Gris Angasomyrtus Trudgen & Keighery Homoranthus A.Cunn. ex Schauer Pimenta Lindl. Angophora Cav. Hottea Urb. Pleurocalyptus Brongn. & Gris Archirhodomyrtus (Nied.) Burret Hypocalymma (Endl.) Endl. Plinia L. Arillastrum Pancher ex Baill. Kania Schltr. Pseudanamomis Kausel Astartea DC. Kardomia Peter G. Wilson Psidium L. [naturalised] Asteromyrtus Schauer Kjellbergiodendron Burret Psiloxylon Thouars ex Tul. Austromyrtus (Nied.) Burret Kunzea Rchb. Purpureostemon Gugerli Babingtonia Lindl. Lamarchea Gaudich. Regelia Schauer Backhousia Hook. & Harv. Legrandia Kausel Rhodamnia Jack Baeckea L. Lenwebia N.Snow & ZGuymer Rhodomyrtus (DC.) Rchb. Balaustion Hook. Leptospermum J.R.Forst. & G.Forst. Rinzia Schauer Barongia Peter G.Wilson & B.Hyland Lindsayomyrtus B.Hyland & Steenis Ristantia Peter G.Wilson & J.T.Waterh. -
Autogamy and Allogamy in Genus Lathyrus
Lathyrus Lathyrism Newsletter 2 (2001) Autogamy and allogamy in genus pots, 20 cm in diameter, the plants were grown under homogenous conditions (25°C and 12h /day length) in Lathyrus an experimental garden, at the National Agronomic Research Institute of Tunisia (Upper Semi-arid). Plant flowering occurred from April (L. cicera, L. sativus and L. aphaca) to June (L. latifolius and L. sylvestris). N. Ben Brahim1, D. Combes2 and M. 3 Three types of treatments were performed: selfing by Marrakchi bagging flowers in order to prevent insect visitation of the flower (Treatment A), natural pollination without 1. Laboratoire de botanique, Institut National de la castration of anthers (Treatment B) and natural Recherche Agronomique de Tunisie, pollination following castration of anthers (Treatment Rue Hédi Karray, 2049, Ariana, Tunisie. C). Each type of operation was performed on 15 2. Laboratoire d’Ecologie Moléculaire, IBEAS, flowers per plant, 5 plants were studied per species. Université de Pau et des Pays de Ladours, France. Two fertility parameters were measured for each plant 3. Laboratoire de Génétique et de Biologie on 15 flowers per plant: the frequency of flowers Moléculaire, Faculté des Sciences de Tunis. giving pods (p/f) and the mean number of seeds per pod (g/p). Email : (1) [email protected] The values of the ratio p/f ranged from 0 to 1, the transformation Introduction f(x) = arc sin√x, where x = p/f, was used. In Tunisia the genus Lathyrus is represented by 15 (11) native species , distributed essentially in marginal Statistical analysis. The data of the fertility parameters environments in the north of the country. -
Inquiry Into the Utilisation of Victorian Native Flora and Fauna
ENVIRONMENT AND NATURAL RESOURCES COMMITTEE INQUIRY INTO THE UTILISATION OF VICTORIAN NATIVE FLORA AND FAUNA REPORT June 2000 ___________________________________ Ordered to be printed ___________________________________ VICTORIAN GOVERNMENT PRINTER 2000 No 30 Session 1999/2000 The Committee records its appreciation to all those who have contributed to the Inquiry and the preparation of this report. A large number of individuals and organisations made their expertise and experience available through the submission process, the Committee’s inspection program and the public hearing process; they are listed in the Appendices. Specialist consultancies were undertaken by Mr Quentin Farmar-Bowers of Star Eight Consulting, Dr Graham Steed of G.R. Steed and Associates Pty Ltd and Mrs Tannetje Bryant and Mr Keith Akers of the Faculty of Law, Monash University. Technical review and advice was provided by Dr Robert Begg and Mr Spencer Field of the Department of Natural Resources and Environment and their associates. Additional technical advice was provided by Mr Tony Charters, Director of Planning and Destination Development, Tourism Queensland, Dr Graham Hall and associates of the Tasmanian Department of Parks and Wildlife, Professor Hundle of the National Ecotourism Accreditation Program, and Dr Ray Wills, Senior Ecologist at Kings Park and Botanic Gardens, Western Australia. The cover photograph is of Grampians Thryptomene (Thryptomene calycina) taken by Dr David Beardsell. Cover design by Luke Flood of Actual Size, with printing by Acuprint. Editing services were provided by Ms Heather Kelly. The report was drafted by the staff of the Environment and Natural Resources Committee: Ms Julie Currey, Dr Andrea Lindsay, and Mr Brad Miles. -
How Does Genome Size Affect the Evolution of Pollen Tube Growth Rate, a Haploid Performance Trait?
Manuscript bioRxiv preprint doi: https://doi.org/10.1101/462663; this version postedClick April here18, 2019. to The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv aaccess/download;Manuscript;PTGR.genome.evolution.15April20 license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Effects of genome size on pollen performance 2 3 4 5 How does genome size affect the evolution of pollen tube growth rate, a haploid 6 performance trait? 7 8 9 10 11 John B. Reese1,2 and Joseph H. Williams2 12 Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 13 37996, U.S.A. 14 15 16 17 1Author for correspondence: 18 John B. Reese 19 Tel: 865 974 9371 20 Email: [email protected] 21 1 bioRxiv preprint doi: https://doi.org/10.1101/462663; this version posted April 18, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 22 ABSTRACT 23 Premise of the Study – Male gametophytes of most seed plants deliver sperm to eggs via a 24 pollen tube. Pollen tube growth rates (PTGRs) of angiosperms are exceptionally rapid, a pattern 25 attributed to more effective haploid selection under stronger pollen competition. Paradoxically, 26 whole genome duplication (WGD) has been common in angiosperms but rare in gymnosperms. -
Mode of Reproduction in Relation to Breeding Methods
© 2020 JETIR October 2020, Volume 7, Issue 10 www.jetir.org (ISSN-2349-5162) MODE OF REPRODUCTION IN RELATION TO BREEDING METHODS Yash Verma, Student, Chandigarh Group of Colleges, Jhanjeri Mohali, India. ABSTRACT: In natural reproduction a portion gets detached from the body of mother plant and its detached portion grows up into a new independent plant under suitable conditions.The special cells or asexual reproductive units are produced by the parent body which grow themselves up into new individuals without two such cells fusing together as in sexual reproduction.The zygote develops into a new plant. The main difference between sexual and asexual reproduction is that in asexual reproduction only one parents sex is concerned while in sexual reproduction both parent sex are concerned.Meiosis and fertilisation are the regular and constant features of amphimixis. Occasionally, irregularities occur in them in which fertilisation is omitted. Even them the embryo develops from egg cell or from cells associated with it. When the pollens of a flower fall on the stigma of another flower on the same plant, it is termed as geitonogamy and genetically is equal to self pollination. Sometimes it occurs in maize where males are on top and females are laterally female on the same plant resulting in geitonogamy. Keywords- Amphimixis, Apomixis, Parthenogenesis, Apogamy, Apospory, Autogamy, Allogamy, Geitonogamy. The breeding methods that may be employed in a particular crop are determined by the mode of reproduction. This relationship will become clearer as the breeding methods used different crop. METHODS OF REPRODUCTION There are three methods of reproduction among plants: 1.