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. 2006 Jan;140(1):221–234. doi: 10.1104/pp.105.070326

Figure 1.

Figure 1.

M. truncatula root responses to S. meliloti. Time points correspond to those used for harvesting RNA from inoculated roots for production of cDNAs for probing microarrays. A, A root hair with swollen tip (arrow) at 1 hpi. B, A root hair with an asymmetrically growing tip (arrow) at 6 hpi. C, Root hair deformation and branching (arrow) at 12 hpi. D, A curled root hair at 24 hpi. E, Cell divisions in the root inner cortex forming a nodule primordium (arrow) at 48 hpi. F, A curled root hair with a nascent infection thread (arrow, blue) at 48 hpi. G, A nodule primordium (arrow) with infection threads (blue) penetrating the dividing cells at 72 hpi. Bars in A, B, C, D, and F are 25 μm, and in E and G are 100 μm.