No detectable maternal effects of elevated CO(2) on Arabidopsis thaliana over 15 generations.
Maternal environment has been demonstrated to produce considerable impact on offspring growth. However, few studies have been carried out to investigate multi-generational maternal effects of elevated CO(2) on plant growth and development. Here we present the first report on the responses of plant reproductive, photosynthetic, and cellular characteristics to elevated CO(2) over 15 generations using Arabidopsis thaliana as a model system. We found that within an individual generation, elevated CO(2) significantly advanced plant flowering, increased photosynthetic rate, increased the size and number of starch grains per chloroplast, reduced stomatal density, stomatal conductance, and transpiration rate, and resulted in a higher reproductive mass. Elevated CO(2) did not significantly influence silique length and number of seeds per silique. Across 15 generations grown at elevated CO(2) concentrations, however, there were no significant differences in these traits. In addition, a reciprocal sowing experiment demonstrated that elevated CO(2) did not produce detectable maternal effects on the offspring after fifteen generations. Taken together, these results suggested that the maternal effects of elevated CO(2) failed to extend to the offspring due to the potential lack of genetic variation for CO(2) responsiveness, and future plants may not evolve specific adaptations to elevated CO(2) concentrations.
Teng
Nianjun
N
Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
Jin
Biao
B
Wang
Qinli
Q
Hao
Huaiqing
H
Ceulemans
Reinhart
R
Kuang
Tingyun
T
Lin
Jinxing
J
D017360:Arabidopsis / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism*; D002736:Chloroplasts / Q000378:metabolism; D055864:Droughts; D004777:Environment; D035264:Flowers / Q000378:metabolism; D017343:Genes, Plant; D008954:Models, Biological; D010788:Photosynthesis; D018515:Plant Leaves / Q000378:metabolism; D018521:Plant Physiological Phenomena; D018526:Plant Transpiration / Q000235:genetics; D012639:Seeds / Q000378:metabolism; D013997:Time Factors
D002245:Carbon Dioxide