RT-PCR and qRT-PCR on laser microdissected cells. (A) RT-PCR analysis of LjNIP1 and LjXIP1 in LMD samples: LjNIP1 amplified fragments were only detected in arbusculated cells (ARB), whereas LjXIP1 fragments were also detected in non-colonized cortical cells from mycorrhizal roots (MNM) and in cortical cells from non-mycorrhizal roots (C). (B) Relative expression of LjXIP1 in LMD samples assessed by means of One-Step qRT-PCR. The highest level was detected in the arbusculated cells. The values are the means of two biological samples and two technical replicates, with bars representing the standard deviations.