The symbiotic interaction between Medicago sativa and Sinorhizobium meliloti RmkatB(++) overexpressing the housekeeping catalase katB is delayed, and this delay is combined with an enlargement of infection threads. This result provides evidence that H(2)O(2) is required for optimal progression of infection threads through the root hairs and plant cell layers.
Interactions Plantes-Microorganismes et Santé Végétale, UMR IPMSV INRA 1064 - CNRS 6192, Université de Nice-Sophia Antipolis, Centre Sophia Agrobiotech, 400 route des chappes, BP 167, F-06903 Sophia Antipolis, France.
