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No detectable maternal effects of elevated CO(2) on Arabidopsis thaliana over 15 generations.

Teng N, Jin B, Wang Q, Hao H, Ceulemans R, Kuang T, Lin J - PLoS ONE (2009)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China.

ABSTRACT
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.

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Effects of elevated CO2 on silique length and number of siliques and seeds.A and B, elevated CO2 had no significant effect on the number of seeds per silique or silique length. C and D, elevated CO2 significantly increased the number of siliques and the number of seeds per plant. Error bars represent the standard deviation of the mean.
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pone-0006035-g002: Effects of elevated CO2 on silique length and number of siliques and seeds.A and B, elevated CO2 had no significant effect on the number of seeds per silique or silique length. C and D, elevated CO2 significantly increased the number of siliques and the number of seeds per plant. Error bars represent the standard deviation of the mean.

Mentions: The number of seeds per silique and silique length did not change significantly in response to CO2 treatment (Figure 2A and B). However, we detected significant treatment effects on the number of siliques and the number of seeds per plant (Figure 2C and D). The average number of siliques and seeds per plant across generations in the elevated treatment were significantly higher than those in the ambient treatment. For example, the average number of siliques and seeds per plant exposed to elevated CO2 concentrations were about 36% and 37% higher, respectively, than those exposed to ambient CO2 concentrations. In the same CO2 treatment, however, the number of siliques and the number of seeds per plant did not differ significantly across generations. Across generations, the average number of siliques per plant in the elevated and ambient CO2 treatments averaged around 280 and 206, respectively. Similarly, the average number of seeds per treatment across the 15 generations averaged around 13,000 for elevated CO2 and 9,500 for ambient CO2.


No detectable maternal effects of elevated CO(2) on Arabidopsis thaliana over 15 generations.

Teng N, Jin B, Wang Q, Hao H, Ceulemans R, Kuang T, Lin J - PLoS ONE (2009)

Effects of elevated CO2 on silique length and number of siliques and seeds.A and B, elevated CO2 had no significant effect on the number of seeds per silique or silique length. C and D, elevated CO2 significantly increased the number of siliques and the number of seeds per plant. Error bars represent the standard deviation of the mean.
© Copyright Policy
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC2698214&req=5

pone-0006035-g002: Effects of elevated CO2 on silique length and number of siliques and seeds.A and B, elevated CO2 had no significant effect on the number of seeds per silique or silique length. C and D, elevated CO2 significantly increased the number of siliques and the number of seeds per plant. Error bars represent the standard deviation of the mean.
Mentions: The number of seeds per silique and silique length did not change significantly in response to CO2 treatment (Figure 2A and B). However, we detected significant treatment effects on the number of siliques and the number of seeds per plant (Figure 2C and D). The average number of siliques and seeds per plant across generations in the elevated treatment were significantly higher than those in the ambient treatment. For example, the average number of siliques and seeds per plant exposed to elevated CO2 concentrations were about 36% and 37% higher, respectively, than those exposed to ambient CO2 concentrations. In the same CO2 treatment, however, the number of siliques and the number of seeds per plant did not differ significantly across generations. Across generations, the average number of siliques per plant in the elevated and ambient CO2 treatments averaged around 280 and 206, respectively. Similarly, the average number of seeds per treatment across the 15 generations averaged around 13,000 for elevated CO2 and 9,500 for ambient CO2.

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China.

ABSTRACT
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.

Show MeSH