title: Characterization of full-length enriched expressed sequence tags of dehydration-treated white fibrous roots of sweetpotato.
abstract: Sweetpotato (Ipomoea batatas (L). Lam.) is relatively tolerant to unfavorable growth conditions such as drought, yet has not been exploited to provide a better understanding of the molecular basis of drought stress tolerance. We obtained 983 high-quality expressed sequence tags of 100 bp or longer (average length of 700 bp) from cDNA libraries of detached white fibrous root tissues by subjecting them to dehydration for 6 h. The 431 cDNAs were each assigned a function by alignment using the BLASTX algorithm. Among them, three genes associated with various abiotic stresses and nine genes not previously associated with drought stress were selected for expression pattern analysis through detailed reverse transcription-polymerase chain reaction. The direct and indirect relationships of the 12 genes with drought tolerance mechanisms were ascertained at different developmental stages and under various stress conditions.
authors.affiliation: Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-333, Korea.
authors.forename: Sun-Hyung
authors.initials: SH
authors.lastname: Kim
authors.forename: Wan-Keun
authors.initials: WK
authors.lastname: Song
authors.forename: Yun-Hee
authors.initials: YH
authors.lastname: Kim
authors.forename: Suk-Yun
authors.initials: SY
authors.lastname: Kwon
authors.forename: Haeng-Soon
authors.initials: HS
authors.lastname: Lee
authors.forename: In-Chul
authors.initials: IC
authors.lastname: Lee
authors.forename: Sang-Soo
authors.initials: SS
authors.lastname: Kwak
mesh_terms: D003681:Dehydration / Q000235:genetics*; D020224:Expressed Sequence Tags; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D027723:Ipomoea batatas / Q000033:anatomy & histology / Q000235:genetics* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D018517:Plant Roots / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction