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Three developmental changes were observed in the roots of Arabidopsis thaliana (Columbia) when shoots were exposed to elevated CO2(i) The allometric coefficient, k, was enhanced significantly (P<0.001), (ii) primary root length and root extension rate were enhanced (P<0.001). Accelerated cortical cell expansion contributed to this effect and was associated with increased cell wall extensibility, measured as % plasticity. (III) Lateral root formation and extension were also increased in elevated CO2(P<0.05). These results illustrate that root growth and structure was altered following exposure to elevated CO2. The changes observed suggest that Arabidopsis provides a useful model which should, in future, be amendable to study using appropriate mutants allowing the genetic basis of the responses to be identified.

Original publication

DOI

10.1093/jxb/49.320.593

Type

Journal article

Journal

Journal of Experimental Botany

Publication Date

01/01/1998

Volume

49

Pages

593 - 597