title: Responses of the Hybrid between Sphagneticola trilobata and Sphagneticola calendulacea to Low Temperature and Weak Light Characteristic in South China.
abstract: Hybridization between exotic and native species is of great interest to evolutionary biologists and ecologists because it usually shows a quick evolution of species and invasiveness. It has been reported that such hybridization frequently increases the adaptation and aggressiveness of the new hybrids. A hybrid between invasive Sphagneticola trilobata and its native congener S. calendulacea was recently found in subtropical China. S. calendulacea has a significantly higher tolerance to low temperature and weak light stress than S. trilobata, and its range includes both tropical and temperate regions. This study examined how the tolerance of the new hybrid to low temperature and weak light conditions (LTWL), expanded its geographical range. All changes of phenotype, gas exchange parameters, chlorophyll fluorescence parameters, contents of malonaldehyde (MDA) and activity of superoxide dismutase (SOD) and peroxidase (POD) indicated that hybridization slightly catalyzed the tolerance of the hybrid to LTWL condition and the responses of the hybrid were more similar with their invasive parent. The results demonstrate that the current hybrid populations may not expand their geographical distribution ranges in a short period, but the distribution of the backcrossed generations is still uncertain. The threat of the hybrid to its native parent in subtropical region should be concerned.
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.|Guangdong Open Laboratory of Geospatial Information Technology and Application, Guangzhou Institute of Geography, Guangzhou 510070, China.
authors.forename: Zhongyu
authors.initials: Z
authors.lastname: Sun
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Yanqiao
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Environmental Studies, Faculty of Social Sciences, University of Victoria, Victoria, BC V8W 5Y2, Canada.
authors.forename: Valentin
authors.initials: V
authors.lastname: Schaefer
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Huimiao
authors.initials: H
authors.lastname: Liang
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Li
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Shengqin
authors.initials: S
authors.lastname: Huang
authors.affiliation: Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitor, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China.
authors.forename: Changlian
authors.initials: C
authors.lastname: Peng
mesh_terms: D019659:Asteraceae / Q000235:genetics* / Q000502:physiology* / Q000528:radiation effects; D002681:China; D002734:Chlorophyll / Q000378:metabolism; D003080:Cold Temperature; D005453:Fluorescence; D005740:Gases / Q000378:metabolism; D006824:Hybridization, Genetic; D008027:Light; D008315:Malondialdehyde / Q000378:metabolism; D009195:Peroxidase / Q000378:metabolism; D010641:Phenotype; D018515:Plant Leaves / Q000033:anatomy & histology / Q000201:enzymology / Q000528:radiation effects; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D005740:Gases; D002734:Chlorophyll; D008315:Malondialdehyde; D009195:Peroxidase; D013482:Superoxide Dismutase