title: Stimulated leaf dark respiration in tomato in an elevated carbon dioxide atmosphere.
abstract: It is widely accepted that leaf dark respiration is a determining factor for the growth and maintenance of plant tissues and the carbon cycle. However, the underlying effect and mechanism of elevated CO2 concentrations ([CO2]) on dark respiration remain unclear. In this study, tomato plants grown at elevated [CO2] showed consistently higher leaf dark respiratory rate, as compared with ambient control plants. The increased respiratory capacity was driven by a greater abundance of proteins, carbohydrates, and transcripts involved in pathways of glycolysis carbohydrate metabolism, the tricarboxylic acid cycle, and mitochondrial electron transport energy metabolism. This study provides substantial evidence in support of the concept that leaf dark respiration is increased by elevated [CO2] in tomato plants and suggests that the increased availability of carbohydrates and the increased energy status are involved in the increased rate of dark respiration in response to elevated [CO2].
authors.affiliation: 1] Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, P.R. China [2].
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Guanqun
authors.initials: G
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yangwenke
authors.initials: Y
authors.lastname: Liao
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Zhou
authors.forename: Xiaojian
authors.initials: X
authors.lastname: Xia
authors.forename: Kai
authors.initials: K
authors.lastname: Shi
authors.forename: Jingquan
authors.initials: J
authors.lastname: Yu
mesh_terms: D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000378:metabolism*; D019069:Cell Respiration; D003624:Darkness; D045222:Electron Transport Chain Complex Proteins; D004734:Energy Metabolism; D018551:Solanum lycopersicum / Q000235:genetics / Q000378:metabolism*; D008928:Mitochondria / Q000235:genetics / Q000378:metabolism; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism; D018515:Plant Leaves / Q000235:genetics / Q000378:metabolism*; D020543:Proteome; D059467:Transcriptome
chemical_list: D045222:Electron Transport Chain Complex Proteins; D020543:Proteome; D002245:Carbon Dioxide; D010100:Oxygen