Characterization of Leaf Transcriptome in a Tropical Tree Species, <i>Shorea curtisii</i>, over a Flowering Season

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  • SUHAIMI Ahmad Husaini
    Institute of Biological Sciences, Faculty of Science, Universiti Malaya
  • KOBAYASHI Masaki J.
    Forestry Division, Japan International Research Center for Agricultural Sciences
  • SATAKE Akiko
    Department of Biology, Faculty of Science, Kyushu University
  • LEE Soon Leong
    Forestry Biotechnology Division, Forest Research Institute Malaysia
  • MUHAMMAD Norwati
    Forestry Biotechnology Division, Forest Research Institute Malaysia
  • OTANI Tatsuya
    Shikoku Research Center, Forestry and Forest Products Research Institute, Forestry Research and Management Organization
  • KONDO Toshiaki
    Bio-Resources and Utilization Division, Japan International Research Center for Agricultural Sciences
  • TANI Naoki
    Forestry Division, Japan International Research Center for Agricultural Sciences Faculty of Life and Environmental Sciences, University of Tsukuba
  • YEOH Suat Hui
    Institute of Biological Sciences, Faculty of Science, Universiti Malaya

説明

<p>General flowering (GF) is a synchronous flowering phenomenon in the Southeast Asian tropical rainforests that occurs at irregular intervals of multiple years. While in this study, the leaf transcriptome of a GF species, Shorea curtisii obtained from three-time points – before and after floral initiation, and post-flowering stage – was sequenced, the unpredictable intervals of GF raise conservation concerns for these under-researched forests with rich economically and ecologically important species. We assembled 243,759,478 sequencing reads into 39,943 non-redundant unigenes including 677 putative homologs of Arabidopsis thaliana flowering-related genes. Differential expression analysis conducted on pairwise comparisons of the time points identified 930 differentially expressed unigenes, which includes 17 flowering-related homologs. The differential expression of unigenes with significant enrichments of functions related to drought corroborated the involvement of drought as an environmental cue for GF, with the outcomes of this study offering an insight into the conservation of floral regulatory genes and pathways in Shorea and possibly being used as a model to better understand the floral initiation cues and regulation of GF trees.</p>

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