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Browsing Natural and Agricultural Sciences by Supervisor "Wingfield, Brenda D."
Now showing items 1-20 of 71
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(University of Pretoria, 2011-08-06)DNA micro-array technology is a new and powerful technology that could substantially increase the speed of forest tree breeding programmes. This thesis represents a compilation of investigations that focus on the exploitation ...
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(University of Pretoria, 2007-06-21)Fusarium circinatum is the causal agent of the disease known as pitch canker of pine. The fungus causes resinous cankers on stems and branches of mature trees, dieback of female flowers and cones, as well as root rot and ...
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(University of Pretoria, 2011-09-23)
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(University of Pretoria, 2022)Nematodes often associate with insects. Usually, it is the nematode that benefits from this interaction as the insect serves either as vector – for many plant- and vertebrate-parasitic nematodes (VPN) – or as the target ...
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(University of Pretoria, 2010-11-12)Inflorescence malformation in Syzygium cordatum and Mangifera indica (mango) is characterised by abnormally enlarged and excessively branched panicles, which are unable to bear fruits. In mango, the malformation disease ...
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(University of Pretoria, 2023)Plant-pathogenic organisms including fungi pose significant risks to agriculture, horticulture, and natural and plantation forests. This affects attainment of some of the 17 Sustainable Development Goals (SDGs) to transform ...
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(University of Pretoria, 2013)The success of the forestry industry in the world and particularly the Southern hemisphere can be attributed to the choice of fast and easy-growing exotic pine and eucalypt tree species, which have been planted separated ...
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(University of Pretoria, 2009-06-17)The Koala bears housed and maintained by the Pretoria Zoo are relying on 20 different Eucalyptus species in the Eucalyptus arboretum in Pretoria for food. Species of the Botryosphaeriaceae are well known endophytes and ...
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(University of Pretoria, 2014-06-30)Fungi are capable of both sexual and asexual reproduction. Sexual reproduction involves karyogamy followed by meiosis (Burnett 1968; Alexopoulos, Mims, Blackwell 1996), while asexual reproduction involves neither meiosis ...
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(University of Pretoria, 2013)Spontaneous mutagenesis can be divided into three main steps: the introduction of DNA damage and lesions, damage recognition and DNA repair. All sources of spontaneous mutagenesis originate from within the cell itself, ...
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(University of Pretoria, 2010-11-11)The leaf and shoot blight disease known locally as Daño Foliar del Pino (DFP) is the most important problem affecting Chilean Pinus radiata plantations. The disease is typified by needle infections, exudation of resin ...
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(University of Pretoria, 2010-11-11)
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(University of Pretoria, 2005-09-05)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2021)Orchids form unique symbiotic relationships and are adapted to growing in extreme environments. The growth and survival of orchids are aided by soil microbes such as bacteria, actinomycetes and fungi, particularly mycorrhizal ...
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(University of Pretoria, 2021)The genus Fusarium includes some of the most destructive pathogens of agricultural and forestry crops. Within this genus, Fusarium circinatum is an important pathogen that causes severe disease on pine plants of all ages ...
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(University of Pretoria, 2006)There are many examples of associations between insects and fungi. Where the fungi involved are pathogens, such associations may be of economic importance. Insects of no economic concern alone can also become important ...
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(University of Pretoria, 2012-09-14)The Gibberella fujikuroi species complex accommodates Fusarium spp. in the section Liseola that are unified by a common Gibberella sexual state. These are ubiquitous and economically important pathogens of plants, resulting ...
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(University of Pretoria, 2023)Chapter One of this dissertation presents a literature review of aspects of TEs and their important roles in the genome evolution of Basidiomycota and other fungi. The genome defence mechanisms that prevent the expansion ...
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(University of Pretoria, 2023)Ceratocystis albifundus is an emerging pathogen of non-native Acacia mearnsii in Southern Africa. Although the fungus generally does not cause disease symptoms on native hosts, disease symptoms have been recently observed ...
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(University of Pretoria, 2006-12-18)Leptographium have been known since the early part of the 20th Century and include of many species causing blue stain of timber. Among these species are several species known or believed to be involved in causing diseases ...
Now showing items 1-20 of 71