title: Transcriptomic analysis reveals the flooding tolerant mechanism in flooding tolerant line and abscisic acid treated soybean.
abstract: Soybean is highly sensitive to flooding stress and exhibits markedly reduced plant growth and grain yield under flooding conditions. To explore the mechanisms underlying initial flooding tolerance in soybean, RNA sequencing-based transcriptomic analysis was performed using a flooding-tolerant line and ABA-treated soybean. A total of 31 genes included 12 genes that exhibited similar temporal patterns were commonly changed in these plant groups in response to flooding and they were mainly involved in RNA regulation and protein metabolism. The mRNA expression of matrix metalloproteinase, glucose-6-phosphate isomerase, ATPase family AAA domain-containing protein 1, and cytochrome P450 77A1 was up-regulated in wild-type soybean under flooding conditions; however, no changes were detected in the flooding-tolerant line or ABA-treated soybean. The mRNA expression of cytochrome P450 77A1 was specifically up-regulated in root tips by flooding stress, but returned to the level found in control plants following treatment with the P450 inhibitor uniconazole. The survival ratio and root fresh weight of plants were markedly improved by 3-h uniconazole treatment under flooding stress. Taken together, these results suggest that cytochrome P450 77A1 is suppressed by uniconazole treatment and that this inhibition may enhance soybean tolerance to flooding stress.
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan.|Institute of Crop Science, National Agriculture and Food Research Organization, Kannondai 2-1-2, Tsukuba, 305-8518, Japan.
authors.forename: Xiaojian
authors.initials: X
authors.lastname: Yin
authors.affiliation: Institute of Crop Science, National Agriculture and Food Research Organization, Kannondai 2-1-2, Tsukuba, 305-8518, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Hiraga
authors.affiliation: Institute of Crop Science, National Agriculture and Food Research Organization, Kannondai 2-1-2, Tsukuba, 305-8518, Japan.
authors.forename: Makita
authors.initials: M
authors.lastname: Hajika
authors.affiliation: Graduate School of Life and Food Sciences, Niigata University, Niigata, 950-2181, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Nishimura
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan. skomatsu@affrc.go.jp.|Institute of Crop Science, National Agriculture and Food Research Organization, Kannondai 2-1-2, Tsukuba, 305-8518, Japan. skomatsu@affrc.go.jp.
authors.forename: Setsuko
authors.initials: S
authors.lastname: Komatsu
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D000222:Adaptation, Physiological / Q000235:genetics*; D000595:Amino Acid Sequence; D003577:Cytochrome P-450 Enzyme System / Q000145:classification / Q000235:genetics; D055868:Floods; D020869:Gene Expression Profiling / Q000379:methods*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects*; D010802:Phylogeny; D010937:Plant Growth Regulators / Q000494:pharmacology; D010940:Plant Proteins / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D013025:Glycine max / Q000235:genetics* / Q000254:growth & development; D013997:Time Factors
chemical_list: D010937:Plant Growth Regulators; D010940:Plant Proteins; D000040:Abscisic Acid; D003577:Cytochrome P-450 Enzyme System
keywords: Abscisic acid; Cytochrome P450 77A1; Flooding stress; Mutant; Soybean; Transcriptomics