Ovambo Plant Nomenclature and Classification
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Germination Characteristics of Tree Seeds: Spotlight on Southern African Tree Species
Tree and Forestry Science and Biotechnology ©2007 Global Science Books Germination Characteristics of Tree Seeds: Spotlight on Southern African Tree Species Simon A. Mng’omba1,2 • Elsa S. du Toit1* • Festus K. Akinnifesi2 1 Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, University of Pretoria, 0002 Pretoria, South Africa 2 World Agroforestry Centre, SADC-ICRAF Agroforestry Programme, Chitedze Agricultural Research Station, P.O. Box 30798, Lilongwe 3, Malawi Corresponding author : * [email protected] ABSTRACT Many tree species of economic potential are propagated by seeds, but seed germination information is limited due to inadequate research. This frustrates genetic conservation, ecosystem restoration, domestication and biodiversity efforts. Deforestation, floods, drought and other disasters are endemic to many countries of Africa and these have a negative impact on the availability of many tree species which have a significant contribution as food and income sources. This review takes stock of seed germination and storage behavior of some important southern African tree species. Recalcitrant and orthodox seeds are the two extreme seed germination behaviors distinctly discussed, but information on seed germination and storage behavior of many southern African tree species is limited. Furthermore, knowledge on seed dormancy of recalcitrant or orthodox tree seeds is limited. Orthodox seeds tolerate relatively long storage periods, and hence have inherent primary seed dormancy. Seed dormancy for many recalcitrant tree seeds is not well explained, but such seeds are sensitive to desiccation injury and have a short storage period. Seed germination and storage behavior of many southern African tree species are not fully established with respect to secondary metabolites, fruit pulp composition, growth hormones and physical impediments. -
Seasonal Selection Preferences for Woody Plants by Breeding Herds of African Elephants (Loxodonta Africana)In a Woodland Savanna
Hindawi Publishing Corporation International Journal of Ecology Volume 2013, Article ID 769587, 10 pages http://dx.doi.org/10.1155/2013/769587 Research Article Seasonal Selection Preferences for Woody Plants by Breeding Herds of African Elephants (Loxodonta africana)in a Woodland Savanna J. J. Viljoen,1 H. C. Reynecke,1 M. D. Panagos,1 W. R. Langbauer Jr.,2 and A. Ganswindt3,4 1 Department of Nature Conservation, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa 2 ButtonwoodParkZoo,NewBedford,MA02740,USA 3 Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa 4 Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort 0110, South Africa Correspondence should be addressed to J. J. Viljoen; [email protected] Received 19 November 2012; Revised 25 February 2013; Accepted 25 February 2013 Academic Editor: Bruce Leopold Copyright © 2013 J. J. Viljoen 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. To evaluate dynamics of elephant herbivory, we assessed seasonal preferences for woody plants by African elephant breeding herds in the southeastern part of Kruger National Park (KNP) between 2002 and 2005. Breeding herds had access to a variety of woody plants, and, of the 98 woody plant species that were recorded in the elephant’s feeding areas, 63 species were utilized by observed animals. Data were recorded at 948 circular feeding sites (radius 5 m) during wet and dry seasons. Seasonal preference was measured by comparing selection of woody species in proportion to their estimated availability and then ranked according to the Manly alpha () index of preference. -
Impacts of Global Climate Change on the Phenology of African Tropical Ecosystems
IMPACTS OF GLOBAL CLIMATE CHANGE ON THE PHENOLOGY OF AFRICAN TROPICAL ECOSYSTEMS GABRIELA S. ADAMESCU MSc by Research UNIVERSITY OF YORK Biology October 2016 1 Abstract The climate has been changing at an unprecedented rate, affecting natural systems around the globe. Its impact has been mostly reflected through changes in species’ phenology, which has received extensive attention in the current global-change research, mainly in temperate regions. However, little is known about phenology in African tropical forests. Africa is known to be vulnerable to climate change and filling the gaps is an urgent matter. In this study we assess plant phenology at the individual, site and continental level. We first compare flowering and fruiting events of species shared between multiple sites, accounting for three quantitative indicators, such as frequency, fidelity for conserving a certain frequency and seasonal phase. We complement this analysis by assessing interannual trends of flowering and fruiting frequency and fidelity to their dominant frequency at 11 sites. We complete the bigger picture by analysing flowering and fruiting frequency of African tropical trees at the site and community level. Next, we correlate three climatic indices (ENSO, IOD and NAO) with flowering and fruiting events at the canopy level, at 16 sites. Our results suggest that 30 % of the studied species show plasticity or adaptability to different environments and will most likely be resilient to moderate future climate change. At both site and continental level, we found that annual flowering cycles are dominant, indicating strong seasonality in the case of more than 50% of African tropical species under investigation. -
Phytochemical Constituents of Combretum Loefl. (Combretaceae)
Send Orders for Reprints to [email protected] 38 Pharmaceutical Crops, 2013, 4, 38-59 Open Access Phytochemical Constituents of Combretum Loefl. (Combretaceae) Amadou Dawe1,*, Saotoing Pierre2, David Emery Tsala2 and Solomon Habtemariam3 1Department of Chemistry, Higher Teachers’ Training College, University of Maroua, P.O.Box 55 Maroua, Cameroon, 2Department of Earth and Life Sciences, Higher Teachers’ Training College, University of Maroua, P.O.Box 55 Ma- roua, Cameroon, 3Pharmacognosy Research Laboratories, Medway School of Science, University of Greenwich, Cen- tral Avenue, Chatham-Maritime, Kent ME4 4TB, UK Abstract: Combretum is the largest and most widespread genus of Combretaceae. The genus comprises approximately 250 species distributed throughout the tropical regions mainly in Africa and Asia. With increasing chemical and pharma- cological investigations, Combretum has shown its potential as a source of various secondary metabolites. Combretum ex- tracts or isolates have shown in vitro bioactivitities such as antibacterial, antifungal, antihyperglycemic, cytotoxicity against various human tumor cell lines, anti-inflammatory, anti-snake, antimalarial and antioxidant effects. In vivo studies through various animal models have also shown promising results. However, chemical constituents and bioactivities of most species of this highly diversified genus have not been investigated. The molecular mechanism of bioactivities of Combretum isolates remains elusive. This review focuses on the chemistry of 261 compounds isolated and identified from 31 species of Combretum. The phytochemicals of interest are non-essential oil compounds belonging to the various struc- tural groups such as terpenoids, flavonoids, phenanthrenes and stilbenoids. Keywords: Combretum, phytochemistry, pharmacology, terpenoids, polyphenolic compounds, antibacterial activity, antifungal activity. INTRODUCTION is sometimes persistant, and especially in climbers it forms a hooked wooded spine when the leaf abscises. -
Stillingia: a Newly Recorded Genus of Euphorbiaceae from China
Phytotaxa 296 (2): 187–194 ISSN 1179-3155 (print edition) http://www.mapress.com/j/pt/ PHYTOTAXA Copyright © 2017 Magnolia Press Article ISSN 1179-3163 (online edition) https://doi.org/10.11646/phytotaxa.296.2.8 Stillingia: A newly recorded genus of Euphorbiaceae from China SHENGCHUN LI1, 2, BINGHUI CHEN1, XIANGXU HUANG1, XIAOYU CHANG1, TIEYAO TU*1 & DIANXIANG ZHANG1 1 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China 2University of Chinese Academy of Sciences, Beijing 100049, China * Corresponding author, email: [email protected] Abstract Stillingia (Euphorbiaceae) contains ca. 30 species from Latin America, the southern United States, and various islands in the tropical Pacific and in the Indian Ocean. We report here for the first time the occurrence of a member of the genus in China, Stillingia lineata subsp. pacifica. The distribution of the genus in China is apparently narrow, known only from Pingzhou and Wanzhou Islands of the Wanshan Archipelago in the South China Sea, which is close to the Pearl River estuary. This study updates our knowledge on the geographic distribution of the genus, and provides new palynological data as well. Key words: Island, Hippomaneae, South China Sea, Stillingia lineata Introduction During the last decade, hundreds of new plant species or new species records have been added to the flora of China. Nevertheless, newly described or newly recorded plant genera are not discovered and reported very often, suggesting that botanical expedition and plant survey at the generic level may be advanced in China. As far as we know, only six and eight angiosperm genera respectively have been newly described or newly recorded from China within the last ten years (Qiang et al. -
Mothers, Markets and Medicine Hanna Lindh
Mothers, markets and medicine The role of traditional herbal medicine in primary women and child health care in the Dar es Salaam region, Tanzania Hanna Lindh Degree project in biology, Bachelor of science, 2015 Examensarbete i biologi 15 hp till kandidatexamen, 2015 Biology Education Centre, Uppsala University Supervisors: Sarina Veldman and Hugo de Boer 1 Abstract Traditional medicine is still the most common primary healthcare used in Tanzania, especially among women. The ethnobotanical studies performed in Tanzania have not explored women’s traditional medicine, with the result that we do not know that much about it, including if women’s usage of medicinal plants create a threat against the medicinal flora’s biodiversity or not. Field studies consisting of interviews and collections of medicinal plants were carried out in the Dar es Salaam region in Tanzania before identifying the collected specimens by DNA barcoding, literature and morphology in Uppsala, Sweden. The 33 informants belonged to 15 different ethnic groups and 79% of them had migrated to Dar es Salaam. A total of 249 plant species were mentioned for women’s healthcare and 140 for children’s healthcare. The medicinal plants frequently reported as used for women’s health and childcare during structured interviews and free-listing exercises were Senna occidentalis/ Cassia abbreviata, Zanthoxylum sp., Clausena anisata, Acalypha ornata and Ximenia sp. The most salient uses of medicinal plants by women were during pregnancy, childbirth, menstruation, to induce abortion, and for cleansing infants and treating convulsions in children. Most of the fresh specimens were collected from disturbance vegetation. The informants having most interview answers in common were the market vendors, healers and herbalists and they were the only informants that mentioned species listed as vulnerable on the IUCN Red List of Threatened Species. -
Carbon Based Secondary Metabolites in African Savanna Woody Species in Relation to Ant-Herbivore Defense
Carbon based secondary metabolites in African savanna woody species in relation to anti-herbivore defense Dawood Hattas February 2014 Thesis Presented for the Degree of DOCTOR OF PHILOSOPHY in the Department of Biological Sciences UniveristyUNIVERSITY ofOF CAPE Cape TOWN Town Supervisors: JJ Midgley, PF Scogings and R Julkunen-Tiitto The copyright of this thesis vests in the author. No quotation from it or information derived from it is to be published without full acknowledgementTown of the source. The thesis is to be used for private study or non- commercial research purposes only. Cape Published by the University ofof Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author. University Declaration I Dawood Hattas, hereby declare that the work on which this thesis is based is my original work (except where acknowledgements indicate otherwise) and that neither the whole nor any part of it has been, is being, or is to be submitted for another degree in this or any other university. I authorize the University to reproduce for the purpose of research either the whole or a portion of the content in any manner whatsoever. This thesis includes two publications that were published in collaboration with research colleagues. Thus I am using the format for a thesis by publication. My collaborators have testified that I made substantial contributions to the conceptualization and design of the papers; that I independently ran experiments and wrote the manuscripts, with their support in the form of comments and suggestions (see Appendix). Published papers Hattas, D., Hjältén, J., Julkunen-Tiitto, R., Scogings, P.F., Rooke, T., 2011. -
Chrysobalanaceae: Traditional Uses, Phytochemistry and Pharmacology Evanilson Alves Feitosa Et Al
Revista Brasileira de Farmacognosia Brazilian Journal of Pharmacognosy Chrysobalanaceae: traditional uses, 22(5): 1181-1186, Sep./Oct. 2012 phytochemistry and pharmacology Evanilson Alves Feitosa,1 Haroudo Satiro Xavier,1 Karina Perrelli Randau*,1 Laboratório de Farmacognosia, Universidade Federal de Pernambuco, Brazil. Review Abstract: Chrysobalanaceae is a family composed of seventeen genera and about 525 species. In Africa and South America some species have popular indications Received 16 Jan 2012 for various diseases such as malaria, epilepsy, diarrhea, infl ammations and diabetes. Accepted 25 Apr 2012 Despite presenting several indications of popular use, there are few studies confi rming Available online 14 Jun 2012 the activities of these species. In the course of evaluating the potential for future studies, the present work is a literature survey on databases of the botanical, chemical, Keywords: biological and ethnopharmacological data on Chrysobalanaceae species published Hirtella since the fi rst studies that occurred in the 60’s until the present day. Licania Parinari botany ethnopharmacology ISSN 0102-695X http://dx.doi.org/10.1590/S0102- 695X2012005000080 Introduction Small fl owers usually greenish-white, cyclic, zigomorphic, diclamides, with a developed receptacle, sepals and petals Chrysobalanaceae was fi rst described by the free, general pentamers, androecium consists of two botanist Robert Brown in his study “Observations, stamens to many free or more or less welded together; systematical and geographical, on the herbarium collected superomedial ovary, bi to tricarpellate, unilocular, usually by Professor Christian Smith, in the vicinity of the Congo, with only one ovule and fruit usually drupaceous. In the during the expedition to explore that river, under the Brazilian Cerrado and in the Amazonian forests trees from command of Captain Tuckey, in the year 1816” (Salisbury, the species of the genus Licania can be found. -
Review on Combretaceae Family
Int. J. Pharm. Sci. Rev. Res., 58(2), September - October 2019; Article No. 04, Pages: 22-29 ISSN 0976 – 044X Review Article Review on Combretaceae Family Soniya Rahate*, Atul Hemke, Milind Umekar Department of Quality Assurance, Shrimati Kishoritai Bhoyar College of Pharmacy, Kamptee, Dist-Nagpur 441002, India. *Corresponding author’s E-mail: [email protected] Received: 06-08-2019; Revised: 22-09-2019; Accepted: 28-09-2019. ABSTRACT Combretaceae, the family of flowering plants consisting of 20 genus and 600 important species in respective genus. The two largest genera of the family are Combretum and Terminalia which contains the more no. of species. The members of the family are widely distributed in tropical and subtropical regions of the world. Most members of the trees, shrubs or lianas of the combretaceae family are widely used medicinally. The members of this family contain the different phytoconstituents of medicinal value e.g tannins, flavonoids, terpenoids and alkaloids. Most of the species of this family are used as antimicrobial, antioxidant and antifungal. The biological activities of the some members of this family yet not found. Apart from the medicinal value many members of the Combretaceae are of culinary and ornamental value. Keywords: Combretaceae, Tannins, Flavonoid, Terminalia, Combretum. INTRODUCTION species of Combretum have edible kernels whereas Buchenavia species have edible succulent endocarps. he family combretaceae is a major group of Chemical constituents like tannins are also found in fruits, flowering plants (Angiosperms) included in the bark, leaves, roots and timber in buchenavia and order of Myrtales. Robert Brown established it in T terminalia genera. Many of the species are reputed to 1810 and its inclusion to the order is not in dispute. -
Red Data List Special Edition
Newsletter of the Southern African Botanical Diversity Network Volume 6 No. 3 ISSN 1027-4286 November 2001 Invasive Alien Plants Part 2 Southern Mozambique Expedition Living Plant Collections: Lowveld, Mozambique, Namibia REDSABONET NewsDATA Vol. 6 No. 3 November LIST 2001 SPECIAL EDITION153 c o n t e n t s Red Data List Features Special 157 Profile: Ezekeil Kwembeya ON OUR COVER: 158 Profile: Anthony Mapaura Ferraria schaeferi, a vulnerable 162 Red Data Lists in Southern Namibian near-endemic. 159 Tribute to Paseka Mafa (Photo: G. Owen-Smith) Africa: Past, Present, and Future 190 Proceedings of the GTI Cover Stories 169 Plant Red Data Books and Africa Regional Workshop the National Botanical 195 Herbarium Managers’ 162 Red Data List Special Institute Course 192 Invasive Alien Plants in 170 Mozambique RDL 199 11th SSC Workshop Southern Africa 209 Further Notes on South 196 Announcing the Southern 173 Gauteng Red Data Plant Africa’s Brachystegia Mozambique Expedition Policy spiciformis 202 Living Plant Collections: 175 Swaziland Flora Protection 212 African Botanic Gardens Mozambique Bill Congress for 2002 204 Living Plant Collections: 176 Lesotho’s State of 214 Index Herbariorum Update Namibia Environment Report 206 Living Plant Collections: 178 Marine Fishes: Are IUCN Lowveld, South Africa Red List Criteria Adequate? Book Reviews 179 Evaluating Data Deficient Taxa Against IUCN 223 Flowering Plants of the Criterion B Kalahari Dunes 180 Charcoal Production in 224 Water Plants of Namibia Malawi 225 Trees and Shrubs of the 183 Threatened -
Sustainable Use and Management of Indigenous Plant Resources: a Case of Mantheding Community in Limpopo Province, South Africa
sustainability Article Sustainable Use and Management of Indigenous Plant Resources: A Case of Mantheding Community in Limpopo Province, South Africa Sejabaledi A. Rankoana Department of Sociology and Anthropology; University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa; [email protected]; Tel.: +015-268-2179 or +072-443-1321 Academic Editor: Iain Gordon Received: 24 December 2015; Accepted: 22 February 2016; Published: 3 March 2016 Abstract: Indigenous plant resources provide rural communities with non-timber forest products that provide energy, food, shelter and medicine. Indigenous plant users in the rural communities have developed selective management methods to sustain plant resources. The most common management methods are restrictions on the cutting of green plants, harvesting of some species during certain seasons, exclusive harvesting of the leaves of certain species and collection of lateral roots from medicinal plant species. The present study examined the use and management strategies developed by members of Mantheding community to sustain indigenous plant resources. The study results are derived from 100 structured interviews and transect walks with key-informants. Multiple uses of indigenous plants are observed. The plants are sources of medicine, food, fodder and fuel. Sustainable management of indigenous plants is accomplished through harvesting practices, seed propagation and control of plant use by the local chief. These management strategies may be referred to as in situ management methods in which the fruits, leaves, roots, bulbs, stem, bark and wood are harvested in their habitats and direct conservation methods are applied to sustain the resources. Keywords: indigenous knowledge; plant resource; sustainability; rural community; Limpopo province 1. -
Large Tree Mortality in Kruger National Park
Tough times for large trees: Relative impacts of elephant and fire on large trees in Kruger National Park Graeme Shannon1, Maria Thaker1 Abi Tamim Vanak1, Bruce Page1, Rina Grant2, Rob Slotow1 1University of KwaZulu-Natal, 2Scientific Services, SANParks Shannon G., Thaker M, et al. 2011. Ecosystems 14: 1372-1381 Large trees in savanna ecosystems • Key role in ecosystem functioning – Keystone components – Nutrient pumps – Habitat heterogeneity – Increase biodiversity Damage to large trees: Role of elephant • Foliage utilisation • Breaking of large branches • Debarking • Pushing over Damage to large trees: Role of fire • Removal of lower crown biomass • Damage to tissues • Topkill Effect of elephant and fire: are they additive? • Elephant damage to trees makes them more susceptible to fire • Opening up of canopy increases fuel load – Higher intensity fires Understanding the patterns of damage • Determine impact of elephant, fire (main ecological drivers) and disease on large trees over a 30-month period subsequent to initial description • Particular focus on the independent and combined effects of previous impact on subsequent levels of impact and mortality Surveys of large trees • Transects: 2.5 years apart (Apr 2006, Nov 2008) • 22 Transects (67 km total) • Southern Kruger • N = 2522 trees (> 5 m height) 1st survey of large trees • location of individual trees (≥ 5 m height) • species, dimensions • use/impact by elephant (proportion tree volume removed) • fire damage (proportion tree volume removed) • disease (presence of wood borer,