title: Alternative splicing and differential expression of two transcripts of nicotine adenine dinucleotide phosphate oxidase B gene from Zea mays.
abstract: With the exception of rice, little is known about the existence of respiratory burst oxidase homolog (rboh) gene in cereals. The present study reports the cloning and analysis of a novel rboh gene, termed ZmrbohB, from maize (Zea mays L.). The full-length cDNA of ZmrbohB encodes a 942 amino acid protein containing all of the respiratory burst oxidase homolog catalytically critical motifs. Alternative splicing of ZmrbohB has generated two transcript isoforms, ZmrbohB-alpha and -beta. Spliced transcript ZmrbohB-beta retains an unspliced intron 11 that carries a premature termination codon and probably leads to nonsense-mediated mRNA decay. Expression analysis showed that two splice isoforms were differentially expressed in various tissues and at different developmental stages, and the major product was ZmrbohB-alpha. The transcripts of ZmrbohB-alpha accumulated markedly when the maize seedlings were subjected to various abiotic stimuli, such as wounding, cold (4 degrees C), heat (40 degrees C), UV and salinity stress. In addition, several abiotic stimuli also affected the alternative splicing pattern of ZmrbohB except wounding. These results provide new insight into roles in the expression regulation of plant rboh genes and suggest that ZmrbohB gene may play a role in response to environmental stresses.
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Lin
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ming-Yi
authors.initials: MY
authors.lastname: Jiang
mesh_terms: D017398:Alternative Splicing / Q000187:drug effects / Q000528:radiation effects; D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D020869:Gene Expression Profiling; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects / Q000528:radiation effects; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000528:radiation effects; D008969:Molecular Sequence Data; D010088:Oxidoreductases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride / Q000494:pharmacology; D013312:Stress, Physiological / Q000187:drug effects / Q000528:radiation effects; D013696:Temperature; D014466:Ultraviolet Rays; D003313:Zea mays / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics* / Q000528:radiation effects
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger; D012965:Sodium Chloride; D010088:Oxidoreductases