title: Expression profiles of defence related cDNAs in oil palm (Elaeis guineensis Jacq.) inoculated with mycorrhizae and Trichoderma harzianum Rifai T32.
abstract: Basal stem rot is one of the major diseases of oil palm (Elaies guineensis Jacq.) caused by pathogenic Ganoderma species. Trichoderma and mycorrhizae were proposed to be able to reduce the disease severity. However, their roles in improving oil palm defence system by possibly inducing defence-related genes in the host are not well characterized. To better understand that, transcript profiles of eleven putative defence-related cDNAs in the roots of oil palm inoculated with Trichoderma harzianum T32 and mycorrhizae at different time points were studied. Transcripts encoding putative Bowman-Birk protease inhibitor (EgBBI2) and defensin (EgDFS) increased more than 2 fold in mycorrhizae-treated roots at 6 weeks post inoculation (wpi) compared to those in controls. Transcripts encoding putative dehydrin (EgDHN), glycine-rich RNA binding protein (EgGRRBP), isoflavone reductase (EgIFR), type 2 ribosome inactivating protein (EgT2RIP), and EgDFS increased in the oil palm roots treated with T. harzianum at 6 and/or 12 wpi compared to those in the controls. Some of these genes were also expressed in oil palm roots treated with Ganoderma boninense. This study provides an insight of some defence-related genes induced by Trichoderma and mycorrhizae, and their roles as potential agents to boost the plant defence system.
authors: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia. Electronic address: yungchie@gmail.com.
authors: Yung-Chie
authors: YC
authors: Tan
authors: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia. Electronic address: muiyun@agri.upm.edu.my.
authors: Mui-Yun
authors: MY
authors: Wong
authors: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia. Electronic address: clho@upm.edu.my.
authors: Chai-Ling
authors: CL
authors: Ho
mesh_terms: D028023:Arecaceae / Q000235:genetics* / Q000382:microbiology; D018076:DNA, Complementary / Q000235:genetics*; D020869:Gene Expression Profiling; D017343:Genes, Plant; D038821:Mycorrhizae / Q000302:isolation & purification / Q000502:physiology*; D012333:RNA, Messenger / Q000235:genetics; D014242:Trichoderma / Q000302:isolation & purification / Q000502:physiology*
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger
keywords: Biocontrol; Defence; Elaeis guineensis; Mycorrhizae; Oil palm; Trichoderma harzianum