Abstract:
:Plants would experience more complex environments, such as sudden heat shock (SHS) stress combined with elevated CO2 in the future, and might adapt to this stressful condition by optimizing photosynthetic carbon metabolism (PCM). It is interesting to understand whether this acclimation process would be altered in different genotypes of maize under elevated CO2, and which metabolites represent key indicators reflecting the photosynthetic rates (PN) following SHS. Although B76 had greater reduction in PN during SHS treatment, our results indicated that PN in genotype B76, displayed faster recovery after SHS treatment under elevated CO2 than in genotype B106. Furthermore, we employed a stepwise feature extraction approach by partial linear regression model. Our findings demonstrated that 9 key metabolites over the total (35 metabolites) can largely explain the variance of PN during recovery from SHS across two maize genotypes and two CO2 grown conditions. Of these key metabolites, malate, valine, isoleucine, glucose and starch are positively correlated with recovery pattern of PN. Malate metabolites responses to SHS were further discussed by incorporating with the activities and gene expression of three C4 photosynthesis-related key enzymes. We highlighted the importance of malate metabolism during photosynthesis recovery from short-term SHS, and data integration analysis to better comprehend the regulatory framework of PCM in response to abiotic stress.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Qu M,Chen G,Bunce JA,Zhu X,Sicher RCdoi
10.1038/s41598-018-26283-xsubject
Has Abstractpub_date
2018-05-18 00:00:00pages
7849issue
1issn
2045-2322pii
10.1038/s41598-018-26283-xjournal_volume
8pub_type
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