ABSTRACT
Abiotic stresses, including cold and drought, negatively affect maize (Zea mays L.) seed field emergence and later yield and quality. In order to reveal the molecular mechanism of maize seed resistance to abiotic stress at seed germination, the global transcriptome of high- vigour variety Zhongdi175 exposed to cold- and drought- stress was analyzed by RNA-seq. In the comparison between the control and different stressed sample, 12,299 differentially expressed genes (DEGs) were detected, of which 9605 and 7837 DEGs were identified under cold- and drought- stress, respectively. Functional annotation analysis suggested that stress response mediated by the pathways involving ribosome, phenylpropanoid biosynthesis and biosynthesis of secondary metabolites, among others. Of the obtained DEGs (12,299), 5,143 genes are common to cold- and drought- stress, at least 2248 TFs in 56 TF families were identified that are involved in cold and/or drought treatments during seed germination, including bHLH, NAC, MYB and WRKY families, which suggested that common mechanisms may be originated during maize seed germination in response to different abiotic stresses. This study will provide a better understanding of the molecular mechanism of response to abiotic stress during maize seed germination, and could be useful for cultivar improvement and breeding of high vigour maize cultivars.
Subject(s)
Acclimatization/genetics , Cold-Shock Response/genetics , Germination , Plant Breeding/methods , Zea mays/growth & development , Chimera/genetics , Chimera/growth & development , Droughts , Gene Expression Regulation, Plant , RNA-Seq , Seeds/growth & development , Transcriptome , Zea mays/geneticsABSTRACT
OBJECTIVE: To evaluate the clinical application of lung function analysis in diagnosis of children respiratory diseases. METHODS: Respiratory function was evaluated with portable lung function detector in 6 261 children with respiratory diseases. FEV1, FVC and PEFR were measured in 268 children with cough variant asthma (CVA) and 147 children with asthma (AS), and the results were self-compared during follow-up. RESULT: There were no significant differences in above parameters between children with cough variant asthma and those with asthma (P>0.05). Lung functions of asthma children were improved evidently by administration of glycocorticoid inhalator (P<0.001). CONCLUSION: Lung function detection is essential for diagnosis of asthma and it can be used as a reliable index for therapeutic effect of asthma children.
