AI Article Synopsis
- Basal stem rot is a significant disease affecting oil palm caused by Ganoderma species, with Trichoderma and mycorrhizae suggested to reduce its severity.
- Research focused on examining the expression of eleven defense-related genes in oil palm roots infected with Trichoderma harzianum T32 and mycorrhizae over time.
- Results showed that certain genes (like EgBBI2 and EgDFS) were significantly upregulated in roots treated with mycorrhizae and Trichoderma, indicating their potential role in enhancing the plant's defense mechanisms against the disease.
Article 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.
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| http://dx.doi.org/10.1016/j.plaphy.2015.08.014 | DOI Listing |
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