Figure 2.

In Situ Hybridization of M. truncatula Hairy Roots Colonized with Glomus sp DAOM 197198.

(A) Overview of a cross-sectioned mycorrhizal M. truncatula root. AR, arbuscule; IH, intraradical hyphae.

(B) Detail of a cross-sectioned mycorrhizal root hybridized with the antisense probe for MST2. Positive purple staining at arbuscules and IH indicates MST2 expression.

(C) No staining is visible in sections of the same root hybridized with the MST2 sense probe.

[See online article for color version of this figure.]