title: Effects of CO(2) enrichment on growth and development of Impatiens hawkeri.
abstract: The effects of CO(2) enrichment on growth and development of Impatiens hawkeri, an important greenhouse flower, were investigated for the purpose of providing scientific basis for CO(2) enrichment to this species in greenhouse. The plants were grown in CO(2)-controlled growth chambers with 380 (the control) and 760 (CO(2) enrichment) μmol · mol(-1), respectively. The changes in morphology, physiology, biochemistry, and leaf ultrastructure of Impatiens were examined. Results showed that CO(2) enrichment increased flower number and relative leaf area compared with the control. In addition, CO(2) enrichment significantly enhanced photosynthetic rate, contents of soluble sugars and starch, activities of peroxidase (POD), superoxide dismutase (SOD), and ascorbate peroxidase (APX), but reduced chlorophyll content and malondialdehyde (MDA) content. Furthermore, significant changes in chloroplast ultrastructure were observed at CO(2) enrichment: an increased number of starch grains with an expanded size, and an increased ratio of stroma thylakoid to grana thylakoid. These results suggest that CO(2) enrichment had positive effects on Impatiens, that is, it can improve the visual value, promote growth and development, and enhance antioxidant capacity.
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Fan-Fan
authors.initials: FF
authors.lastname: Zhang
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Wang
authors.forename: Zhi-Zhe
authors.initials: ZZ
authors.lastname: Huang
authors.forename: Xiao-Chen
authors.initials: XC
authors.lastname: Zhu
authors.forename: Feng-Jiao
authors.initials: FJ
authors.lastname: Zhang
authors.forename: Fa-Di
authors.initials: FD
authors.lastname: Chen
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Fang
authors.forename: Nian-Jun
authors.initials: NJ
authors.lastname: Teng
mesh_terms: D060387:Ascorbate Peroxidases / Q000378:metabolism; D002245:Carbon Dioxide / Q000494:pharmacology*; D002734:Chlorophyll / Q000378:metabolism; D029069:Impatiens / Q000254:growth & development* / Q000378:metabolism / Q000648:ultrastructure; D008315:Malondialdehyde / Q000378:metabolism; D010544:Peroxidases / Q000378:metabolism; D010788:Photosynthesis; D018515:Plant Leaves / Q000378:metabolism / Q000648:ultrastructure; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D002734:Chlorophyll; D002245:Carbon Dioxide; D008315:Malondialdehyde; D010544:Peroxidases; D060387:Ascorbate Peroxidases; D013482:Superoxide Dismutase