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  • Elevated CO2 stimulates cells to divide in grass meristems: a differential effect in two natural populations of Dactylis glomerata
    Kinsman, E... A. ...
    In this study, we tested the hypothesis that elevated (CO2) shortens the cell cycle in meristems of Dactylis glomerata, more in a Portuguese population (38 degrees 53') than in a Swedish population ... (63 degrees 09;N). In the shoot meristem, the cell cycle shortened to about the same extent (cca 26%) in both populations exposed to the elevated (CO2) treatment. In the root meristem, thecell cycle shortened by 17% in the Portuguese and by 8% in the Swedish population. However, the proportion of rapidly cycling cells increased in the Portuguese much more than in the Swedish popultion in both meristems. In the root meristem, there was a 1-86-fold increase in the Portuguese compared with a 1-31-fold incrase in the Swedish. In the shoot meristem, the increases were 1-5-3-fold for the Portuguese and 1-2-fold for the Swedish. The data are consistent in showing that a major response to the evelated (CO2) treatment was an incrase in the proportion of cells that were cycling and that this was more marked for the Portuguese population. A more general response to the elevated (CO2) treatment was a shortening of the cell cycle regardless of population.
    Vir: Plant, cell and environment. - ISSN 0140-7791 (Let. 20, 1997, str. 1309-1316)
    Vrsta gradiva - članek, sestavni del
    Leto - 1997
    Jezik - angleški
    COBISS.SI-ID - 7026393

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