Production of scopoletin was also reported in leaves of the rubber tree hevea brasiliensis during infection by the fungus microcyclus ulei giesemann et al. Bensch westerdijk fungal biodiversity institute, uppsalalaan 8, utrecht, the netherlands botanische staatssammlung munchen, menzinger stra. Quantitative trait loci qtls for resistance were mapped using 195 f 1 progeny individuals derived from the cross between a susceptible cultivated clone, pb260, and a resistant clone, ro38, derived from interspecific hybridization. Using cultivars which are genetically resistant to south american leaf blight salb caused by the fungus microcyclus ulei is the only way to plant rubber trees in diseaseaffected areas. Transcriptome analysis of distinct cold tolerance strategies.
The components of genetic resistance from the hevea brasiliensis cultivar mdf 180 against south american leaf blight salb caused by microcyclus ulei were investigated by qtl mapping. It can only be effectively countered by the use of resistant cultivars. A rubber trees durable resistance to microcyclus ulei is conferred. Their underrepresentation is largely the result of a lack of scientific knowledge of fungal biodiversity and ecology. Marshalling an impressive body of scientific literature together with traditional.
The stromata contain pycnidial cavities in which conidia are formed. Conidia of microcyclus ulei from infected leaves of twelve clones of hevea, including h. Development and characterization of 296 new polymorphic. Age of coumarins in plantmicrobe interactions plant and. A number of candidate domestication genes are also identified, some of which are associated with rubber biosynthesis in. Guayule and russian dandelion as alternative sources of. Arx, is recognized as the most serious threat to the naturalrubber industry worldwide.
A population of 192 progeny individuals derived from a cross between a resistant clone and a susceptible cultivated clone was planted in a field trial in french guiana in order to evaluate the resistance parameters under real infestation. The fungus models used in this study were colletotrichum gloeosporioides, botryodiplodia theobromae, fusarium oxysporum f. Foliar endophytic fungi from hevea brasiliensis and their antagonism on microcyclus ulei. The microcyclus ulei ascomycetes fungus is the causal agent of southamerican leaf blight salb, this being one of the most important diseases affecting the natural rubber tree hevea brasiliensis. Long lasting rubber tree resistance to microcyclus ulei characterized by reduced conidial emission and absence of teleomorph. Variability of microcyclus ulei isolates from southeast bahia article pdf available in fitopatologia brasileira 285.
Long lasting rubber tree resistance to microcyclus ulei. Microcyclus ulei micculoverview eppo global database. Troispoux v, rodiergoud m, pinard f, seguin m 2000b identification of qtls involved in the resistance to south american leaf blight microcyclus ulei in the rubber tree. Alternatively, you can download the pdf file directly to your computer, from where it can be opened using a pdf reader. Occurrence of eight races of microcyclus ulei on hevea. The guidance below is to assist boston university faculty and employees when assessing activities to determine whether they are covered by export control license requirements. Assessing resistance of rubber tree clones to microcyclus ulei in largescale clone trials in ecuador.
O fungo microcyclus ulei, causador do maldasfolhas da seringueira hevea brasiliensis, e o maior. If you need to print pages from this book, we recommend downloading it as a pdf. Foliar diseases of the rubber tree hevea brasiliensis. Molecular mapping of genes conferring field resistance to. Leaves from mdf180 a partially resistant cultivar from peruvian origin and pb314 a susceptible cultivar were inoculated with m. It is the most economically important member of the genus hevea because the milky latex extracted from the tree is the primary source of natural rubber. This study was carried out to develop treatment methods and determine the effective dose of dry heat treatment and uvc irradiation to kill the fungus models of microcyclus ulei on soybean grains and soybean meals without damaging its nutritional content. The fungus microcyclus ulei is the causative agent of leaf blight in rubber trees, which is one of the most important diseases affecting this crop, since it causes intense defoliation.
Factors affecting discharge, germination and viability of spores of microcyclus ulei. Development and characterization of 296 new polymorphic microsatellite markers for rubber tree hevea brasiliensis. This enables the use of bullzip pdf printer free download was introduced. Its occurrence in nearly all rubber tree growing areas of central and south america is a major impediment to natural rubber production expansion in this part of the world. Foliar endophytic fungi from hevea brasiliensis and their antagonism on microcyclus ulei article pdf available in fungal diversity 471. The present study aimed to select endophytic fungi antagonistic to microcyclus.
General information about microcyclus ulei miccul name language. Contingency plan for south american leaf blight microcyclus ulei. Pdf est profiling of resistant and susceptible hevea. A rubber trees durable resistance to microcyclus ulei is. The rubber tree genome reveals new insights into rubber production and species adaptation. To download the pdf, click the download link above. South american leaf blight salb is a disease of the rubber tree caused by the fungus microcyclus ulei. Thus, this study assessed incidence and severity in the clones fx 3864, ian 710, pb 217, pb 260, pb 235, pb 314, rich man 110, rrim 703, rrim 600 established in a clonal garden in the middle magdalena region of the department of santander colombia.
Ancylobacter is a genus of aerobic bacteria from the family of xanthobacteraceae further reading. Fungal foliar diseases are considered the major cause of yield decline in rubber tree producing countries. Pdf bypassing of a polygenic microcyclus ulei resistance. Fungi represent an essential component of biodiversity, not only because of the large number of species, but also for their ecological, evolutionary and socioeconomic significance. Pdf potensi minyak atsiri untuk mengendalikan potyvirus pada tanaman nilam maya mariana, rita noveriza 53 pdf keefektifan perlakuan panas kering dan iradiasi uvc untuk mematikan cendawan model microcyclus ulei aprida cristin, meity suradji sinaga, abdul muin adnan 59 pdf ketahanan tiga varietas jahe terhadap fusarium oxysporum f. Microcyclus ulei, a fungus causing south american leaf blight of rubber tree, can only be isolated from asexual spores, which remain on a lesion just for a few days.
This innovative book shows how a fungus changed the course of brazilian history. Protection against south american leaf blight of rubber in asia and the pacific region download full pdf version 1mb. South american leaf blight salb, the most dangerous disease of the rubber tree, is responsible for the lack of significant natural rubber production in south america and is a major threat to rubber tree plantations in asia and africa. Protection against south american leaf blight of rubber in asia and the pacific region download full pdf version 1mb food and agriculture organization of the united nations regional office for asia and the pacific. It is the continuation of rivista di patologia vegetale, established in 1892. Bullzip pdf printer filehippo were not located within the annotated sequences in. By far the most important leaf disease is south american leaf blight microcyclus ulei. Occurrence of eight races of microcyclus ulei on hevea rubber. In this report, we assess by suppression subtractive hybridization ssh the biological process of the south american leaf blight salb that is an important disease of rubber tree caused by microcyclus ulei p. Moreover, it is found that genes is associated with the rubber biosynthesis relevant to latex production are significantly expanded in rubber tree. Pdf foliar endophytic fungi from hevea brasiliensis and. Identification of qtls involved in the resistance to south. The microcyclus ulei ascomycetes fungus is the causal agent of southamerican leaf blight salb, this being one of the most important diseases affecting the natural rubber tree hevea brasiliensis in latinaamerica and has been responsible for numerous economic losses. Unfortunately, this book cant be printed from the openbook.
Jun 23, 2014 this study was carried out to develop treatment methods and determine the effective dose of dry heat treatment and uvc irradiation to kill the fungus models of microcyclus ulei on soybean grains and soybean meals without damaging its nutritional content. Est profiling of resistant and susceptible hevea infected by. A newly identified locus controls complete resistance to. The rubber tree genome reveals new insights into rubber. Although the selection of resistant clones is the preferred disease control method, greater knowledge is required of the relationship between host and pathogen. Yet, until recently, fungi received scant consideration in ecology, especially invasion ecology. Keefektifan perlakuan panas kering dan iradiasi uvc untuk. Several pressing motives lead to the search for alternative sources of natural rubber. New phytologist is a leading world journal, publishing original research papers on all aspects of the plant sciences. Warren dean demonstrates convincingly that leaf blight microcyclus ulei, and not demographic and social conditions, caused the collapse of brazils dominant position in the world rubber market in the decades after world war i.
Pdf variability of microcyclus ulei isolates from southeast. Protection against south american leaf blight of rubber in. Chee unit of the rubber research institute of malaysia, university of the west indies, trinidad, w. Numerous field observations led to the hypothesis that the resistance of the cultivar fx2784 to salb is likely to be monogenic. Microcyclus ulei south american leaf blight of rubber. Bypassing of a polygenic microcyclus ulei resistance in rubber tree, analyzed by qtl detection. V, covering fundamental and applied aspects of plant pathology. This study reports a chromosomebased genome for rubber tree and provides novel insight into the spurge chromosome evolution. Jpp will publish original contribution written in english, in the form of fulllenght papers, short communication, disease. The journal of plant pathology jpp is the international journal of the italian phytopathological society s. Mdf 180 has already been described as a cultivar with a high level of partial and longlasting resistance. The amazon basin presents optimal conditions for rubber tree growth, but the occurrence of south american leaf blight, which is caused by the fungus microcyclus ulei p. Factors affecting discharge, germination and viability of.
Est profiling of resistant and susceptible hevea infected by microcyclus ulei. The rubber tree is susceptible to several fungal diseases, including south american leaf blight microcyclus ulei. Arx was isolated by depositing fresh conidia on plain agar and then transferring it to potato sucrose. Development and characterization of 296 new polymorphic microsatellite markers for. The chromosomebased rubber tree genome provides new insights.
In this study, we investigated this hypothesis by examining the distribution of. Leaves from mdf180 a partially resistant cultivar from peruvian origin and pb314. Est profiling of resistant and susceptible hevea infected. The chromosomebased rubber tree genome provides new. Abstract south american leaf blight salb is a disease of the rubber tree caused by the fungus microcyclus ulei.
Races 1 and 2 have previously been recorded only from central america whereas races 4, 5 and 6 previously 4a. Volume 27, issue 12, december 2008, pages 14981503. Testaramse as enzimas peroxidase, esterase, malato desidrogenase, lactado desidrogenase, glicosidase, polifenolosidaxe, alcool desidrogenase, fosfatase alcalina, tetrazolium oxidase e hexoquinase. The introduction of microcyclus ulei into the south east asian areas of production is a continuing threat. The rubber tree genome shows expansion of gene family. The south american leaf blight salb, caused by the fungus microcyclus ulei, is the major rubber tree disease in all central and south america. South american leaf blight salb caused by an ascomycota fungus, microcyclus ulei, is the most severe disease affecting hevea spp. In 1934, the ford company transferred its activities from fordlandia to belterra, planting 6570 ha with highyielding oriental clones. Molecular mapping of genes conferring field resistance to south american leaf blight. This is a serious problem when wishing to study the diversity of the fungus on wild trees, which bear stromatic lesions almost exclusively on old leaves. South american leaf blight of the rubber tree hevea spp. Numerous field observations led to the hypothesis that the resistance of the cultivar fx2784 to salb is likely to. Salb that is an important disease of rubber tree caused by microcyclus ulei p.