Relative mRNA levels in leaf tissue for trehalose biosynthetic genes (A), carbohydrate metabolism genes (B), and sugar transport genes (C). Transcript levels were determined by qRT-PCR in control and salt-stressed plants at silking, pollination, and 3 DAP. Plants were grown as described in “Materials and Methods.” Results are expressed relative to the average levels of three stably expressed genes (PROTEIN PHOSPHATASE 2A COMPLEX A-2 SUBUNIT [PP2AA-2], GLYCERALDEHYDE PHOSPHATE DEHYDROGENASE1 [GAPDH1], and Fbox3). Asterisks indicate that salt treatment had a significant effect over controls (P < 0.05; n = 3).