title: Transcriptional profiling reveals adaptive responses to boron deficiency stress in Arabidopsis.
abstract: Boron (B) is a micronutrient for vascular plants, and B deficiency has been recognized as a limiting factor for crop production in many areas worldwide. To gain a better insight into the adaptability mechanism of plant responses to B starvation, an Arabidopsis whole genome Affymetrix GeneChip was used to evaluate global gene expression alterations in response to short- and long-term B deficiency stress. A large number of B deficiency-responsive genes were identified and grouped by their functions. Genes linked to jasmonic acid (JA) showed the most prominent response under B deficiency. The transcripts for biosynthesis and regulation of JA were constantly induced during short- and long-term B deficiency stress. A set of well-known JA-dependent process and responsive genes showed the same expression profile. This suggested that JA could be a pivotal player in the integration of adaptive responses to B deficiency stress. Moreover, other functional groups of B deficiency-responsive genes (including various encoding the biosynthesis of antioxidants, the basic components of Ca2+ signalling, protein kinases, cell wall-modifying enzymes and proteins, H+-ATPase, K transporters, and a set of enzymes involved in central metabolism and cellular growth) were also observed, and their physiological roles under B deficiency stress are discussed. These results provide some information for a better understanding of plant-adaptive responses to B deficiency stress and potential strategies to improve B efficiency in crops.
authors.affiliation: National Key Laboratory of Crop Genetic Improvement and Microelement Research Centre, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Lishun
authors.initials: L
authors.lastname: Peng
authors.forename: Changying
authors.initials: C
authors.lastname: Zeng
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Hongmei
authors.initials: H
authors.lastname: Cai
authors.forename: Fangsen
authors.initials: F
authors.lastname: Xu
mesh_terms: D017360:Arabidopsis / Q000378:metabolism* / Q000502:physiology; D001483:Base Sequence; D015152:Blotting, Northern; D001895:Boron / Q000172:deficiency*; D017931:DNA Primers; D020869:Gene Expression Profiling; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014158:Transcription, Genetic
chemical_list: D017931:DNA Primers; D001895:Boron