Abstract:
:To understand the transcriptional responses to flooding stress in roots including hypocotyl of soybean seedlings, genome-wide changes in gene expression were analyzed using a soybean microarray chip containing 42,034 60-mer oligonucleotide probes. More than 6,000 of flooding-responsive genes in the roots including hypocotyl of soybean seedlings were identified. The transcriptional analysis showed that genes related to photosynthesis, glycolysis, Ser-Gly-Cys group amino acid synthesis, regulation of transcription, ubiquitin-mediated protein degradation and cell death were significantly up-regulated by flooding. Meanwhile, genes related to cell wall synthesis, secondary metabolism, metabolite transport, cell organization, chromatin structure synthesis, and degradation of aspartate family amino acid were significantly down-regulated. Comparison of the responses with other plants showed that genes encoding pyrophosphate dependent phosphofructokinase were down-regulated in flooded soybean seedlings, however, those in tolerant plants were up-regulated. Additionally, genes related to RNA processing and initiation of protein synthesis were not up-regulated in soybean, however, those in tolerant plants were up-regulated. Furthermore, we found that flooding-specific up-regulation of genes encoding small proteins which might have roles in acclimation to flooding. These results suggest that functional disorder of acclimative responses to flooding through transcriptional and post-transcriptional regulations is involved in occurring flooding injury to soybean seedlings.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Nanjo Y,Maruyama K,Yasue H,Yamaguchi-Shinozaki K,Shinozaki K,Komatsu Sdoi
10.1007/s11103-011-9799-4subject
Has Abstractpub_date
2011-09-01 00:00:00pages
129-44issue
1-2eissn
0167-4412issn
1573-5028journal_volume
77pub_type
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