title: Comparative analysis of the drought-responsive transcriptome in soybean lines contrasting for canopy wilting.
abstract: Drought stress causes significant yield losses in major oil seed crops, such as soybean [Glycine max (L.) Merr]. Few soybean lines have been identified as canopy-wilting tolerant; however, the molecular mechanism conferring tolerance is not fully understood. To understand the biological process, a whole genome transcriptome analysis was performed for leaf tissues of two contrasting soybean lines: drought-susceptible (DS) Pana and drought-tolerant (DT) PI 567690. A pairwise comparison of the DS and DT lines under drought and control conditions detected 1914 and 670 genes with a greater than two-fold change in expression under drought conditions. Pairwise treatment comparison and gene enrichment analysis on the DT line showed the down-regulation of genes associated with protein binding, hydrolase activity, carbohydrate/lipid metabolism, xyloglucan endo-transglycosylases associated with cell-wall, apoplast, and chlorophyll a/b binding proteins. On the other hand, genes that were associated with the biotic stress response, ion binding and transport, the oxido-reductive process and electron carrier activity were up-regulated. Gene enrichment analysis detected UDP glucuronosyl transferase activity-encoding genes to be differentially expressed in PI 567690 under drought stress conditions. We found valuable SNPs variation in aquaporin genes of the DT line that are conserved in known slower canopy-wilting lines, this should facilitate marker-assisted selection in soybeans with improved drought tolerance.
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Silvas J
authors.initials: SJ
authors.lastname: Prince
authors.affiliation: Department of Computer Science, Informatics Institute, University of Missouri, Columbia, MO 65211, USA.
authors.forename: Trupti
authors.initials: T
authors.lastname: Joshi
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Raymond N
authors.initials: RN
authors.lastname: Mutava
authors.affiliation: School of Human and Life Sciences, Canterbury Christ Church University, Canterbury CT1 1QU, United Kingdom.
authors.forename: Naeem
authors.initials: N
authors.lastname: Syed
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Maldonado Dos Santos
authors.initials: Mdos S
authors.lastname: Joao Vitor
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Gunvant
authors.initials: G
authors.lastname: Patil
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Li
authors.initials: L
authors.lastname: Song
authors.affiliation: Department of Computer Science, Informatics Institute, University of Missouri, Columbia, MO 65211, USA.
authors.forename: JiaoJiao
authors.initials: J
authors.lastname: Wang
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Li
authors.initials: L
authors.lastname: Lin
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: J Grover
authors.initials: JG
authors.lastname: Shannon
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA.
authors.forename: Babu
authors.initials: B
authors.lastname: Valliyodan
authors.affiliation: Department of Computer Science, Informatics Institute, University of Missouri, Columbia, MO 65211, USA; School of Human and Life Sciences, Canterbury Christ Church University, Canterbury CT1 1QU, United Kingdom.
authors.forename: Dong
authors.initials: D
authors.lastname: Xu
authors.affiliation: National Center for Soybean Biotechnology and Division of Plant Sciences University of Missouri, Columbia, MO 65211, USA. Electronic address: nguyenhenry@missouri.edu.
authors.forename: Henry T
authors.initials: HT
authors.lastname: Nguyen
mesh_terms: D055864:Droughts; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D000069600:Plant Breeding; D012641:Selection, Genetic; D013025:Glycine max / Q000235:genetics* / Q000378:metabolism; D013312:Stress, Physiological
keywords: Aquaporin; Canopy wilting; Drought stress; RNA-sequencing; Soybean