{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/123918"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/123918","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"THE ROLE OF PKS1 MEDIATED SECONDARY METABOLISM IN HOST PENETRATION AND COLONIZATION DURING RICE BLAST DISEASE","abstract":"MAGNAPORTHE ORYZAE CAUSES DEVASTATING RICE BLAST DISEASES ALL OVER THE WORLD. THIS FUNGUS DIFFERENTIATES A SPECIALIZED INFECTION STRUCTURE, THE APPRESSORIUM, TO PENETRATE THE RICE LEAVES DURING INITIATION OF THE DISEASE. A LAYER OF CONDENSED MELANIN IS FORMED IN THE APPRESSORIUM TO MAINTAIN A HIGH TURGOR PRESSURE THEREIN TO FACILITATE THE HOST PENETRATION. HOWEVER, OTHER MECHANISMS THAT ARE RELATED TO THE APPRESSORIAL PENETRATION REMAIN ELUSIVE. IN THIS STUDY, WE DESCRIBE A PKS1 (POLYKETIDE SYNTHASE) CONTAINING GENE CLUSTER, WHICH IS ESSENTIAL FOR THE APPRESSORIAL FUNCTION. PKS1 DELETION MUTANT GENERATES NON-FUNCTIONAL APPRESSORIA THAT FAIL TO ELABORATE A PROPER PENETRATION PORE OR CONSEQUENTLY FAIL TO PENETRATE THE HOST SURFACE. THE PKS1-DELETION MUTANT ALSO SHOWED DEFECTS IN MELANIN DEPOSITION AND SEPTIN LOCALIZATION. THE ABC3 TRANSPORTER AND A SERINE HYDROLASE FSH1 SHARE THE AFOREMENTIONED GENE CLUSTER WITH PKS1. THESE GENES ARE CO-REGULATED WITH PKS1 AND ARE REQUIRED FOR THE PENETR","abstract_html":"MAGNAPORTHE ORYZAE CAUSES DEVASTATING RICE BLAST DISEASES ALL OVER THE WORLD. THIS FUNGUS DIFFERENTIATES A SPECIALIZED INFECTION STRUCTURE, THE APPRESSORIUM, TO PENETRATE THE RICE LEAVES DURING INITIATION OF THE DISEASE. A LAYER OF CONDENSED MELANIN IS FORMED IN THE APPRESSORIUM TO MAINTAIN A HIGH TURGOR PRESSURE THEREIN TO FACILITATE THE HOST PENETRATION. HOWEVER, OTHER MECHANISMS THAT ARE RELATED TO THE APPRESSORIAL PENETRATION REMAIN ELUSIVE. IN THIS STUDY, WE DESCRIBE A PKS1 (POLYKETIDE SYNTHASE) CONTAINING GENE CLUSTER, WHICH IS ESSENTIAL FOR THE APPRESSORIAL FUNCTION. PKS1 DELETION MUTANT GENERATES NON-FUNCTIONAL APPRESSORIA THAT FAIL TO ELABORATE A PROPER PENETRATION PORE OR CONSEQUENTLY FAIL TO PENETRATE THE HOST SURFACE. THE PKS1-DELETION MUTANT ALSO SHOWED DEFECTS IN MELANIN DEPOSITION AND SEPTIN LOCALIZATION. THE ABC3 TRANSPORTER AND A SERINE HYDROLASE FSH1 SHARE THE AFOREMENTIONED GENE CLUSTER WITH PKS1. THESE GENES ARE CO-REGULATED WITH PKS1 AND ARE REQUIRED FOR THE PENETR","abstract_has_math":false,"creators":["QU ZIWEI"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-01-19","date_published":"2016-01-19","updated_at":"2026-07-24T03:31:00Z","subjects":["Magnaporthe oryzae, PKS, secondary metabolism, appressorium, gene cluster,melanin"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["QU ZIWEI"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2016-01-19"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/123918"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Magnaporthe oryzae, PKS, secondary metabolism, appressorium, gene cluster,melanin"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/ad08d13b-7504-4b36-a586-ce969c19dfca/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["MAGNAPORTHE ORYZAE CAUSES DEVASTATING RICE BLAST DISEASES ALL OVER THE WORLD. THIS FUNGUS DIFFERENTIATES A SPECIALIZED INFECTION STRUCTURE, THE APPRESSORIUM, TO PENETRATE THE RICE LEAVES DURING INITIATION OF THE DISEASE. A LAYER OF CONDENSED MELANIN IS FORMED IN THE APPRESSORIUM TO MAINTAIN A HIGH TURGOR PRESSURE THEREIN TO FACILITATE THE HOST PENETRATION. HOWEVER, OTHER MECHANISMS THAT ARE RELATED TO THE APPRESSORIAL PENETRATION REMAIN ELUSIVE. IN THIS STUDY, WE DESCRIBE A PKS1 (POLYKETIDE SYNTHASE) CONTAINING GENE CLUSTER, WHICH IS ESSENTIAL FOR THE APPRESSORIAL FUNCTION. PKS1 DELETION MUTANT GENERATES NON-FUNCTIONAL APPRESSORIA THAT FAIL TO ELABORATE A PROPER PENETRATION PORE OR CONSEQUENTLY FAIL TO PENETRATE THE HOST SURFACE. THE PKS1-DELETION MUTANT ALSO SHOWED DEFECTS IN MELANIN DEPOSITION AND SEPTIN LOCALIZATION. THE ABC3 TRANSPORTER AND A SERINE HYDROLASE FSH1 SHARE THE AFOREMENTIONED GENE CLUSTER WITH PKS1. THESE GENES ARE CO-REGULATED WITH PKS1 AND ARE REQUIRED FOR THE PENETR"]},{"key":"dc:format.checksum.md5","label":"Dc Format Checksum Md5","values":["a8b1c834cc53370f7f8536c27989b30a","b662d047ec1bf28bd4ec7409a3cae576"]},{"key":"dc:title","label":"Title","values":["THE ROLE OF PKS1 MEDIATED SECONDARY METABOLISM IN HOST PENETRATION AND COLONIZATION DURING RICE BLAST DISEASE"]}]}],"canonical_facts":{"dc:creator":["QU ZIWEI"],"dc:date.issued":["2016-01-19"],"dc:description.abstract":["MAGNAPORTHE ORYZAE CAUSES DEVASTATING RICE BLAST DISEASES ALL OVER THE WORLD. THIS FUNGUS DIFFERENTIATES A SPECIALIZED INFECTION STRUCTURE, THE APPRESSORIUM, TO PENETRATE THE RICE LEAVES DURING INITIATION OF THE DISEASE. A LAYER OF CONDENSED MELANIN IS FORMED IN THE APPRESSORIUM TO MAINTAIN A HIGH TURGOR PRESSURE THEREIN TO FACILITATE THE HOST PENETRATION. HOWEVER, OTHER MECHANISMS THAT ARE RELATED TO THE APPRESSORIAL PENETRATION REMAIN ELUSIVE. IN THIS STUDY, WE DESCRIBE A PKS1 (POLYKETIDE SYNTHASE) CONTAINING GENE CLUSTER, WHICH IS ESSENTIAL FOR THE APPRESSORIAL FUNCTION. PKS1 DELETION MUTANT GENERATES NON-FUNCTIONAL APPRESSORIA THAT FAIL TO ELABORATE A PROPER PENETRATION PORE OR CONSEQUENTLY FAIL TO PENETRATE THE HOST SURFACE. THE PKS1-DELETION MUTANT ALSO SHOWED DEFECTS IN MELANIN DEPOSITION AND SEPTIN LOCALIZATION. THE ABC3 TRANSPORTER AND A SERINE HYDROLASE FSH1 SHARE THE AFOREMENTIONED GENE CLUSTER WITH PKS1. THESE GENES ARE CO-REGULATED WITH PKS1 AND ARE REQUIRED FOR THE PENETR"],"dc:format.checksum.md5":["a8b1c834cc53370f7f8536c27989b30a","b662d047ec1bf28bd4ec7409a3cae576"],"dc:identifier.uri":["https://scholarbank.nus.edu.sg/bitstreams/ad08d13b-7504-4b36-a586-ce969c19dfca/download"],"dc:relation.isreferencedby":["https://scholarbank.nus.edu.sg/handle/10635/123918"],"dc:subject":["Magnaporthe oryzae, PKS, secondary metabolism, appressorium, gene cluster,melanin"],"dc:title":["THE ROLE OF PKS1 MEDIATED SECONDARY METABOLISM IN HOST PENETRATION AND COLONIZATION DURING RICE BLAST DISEASE"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T03:31:00Z"}