Figure 1.

(A) Aerenchyma formation of maize primary roots under waterlogged conditions, aerobic conditions and aerobic conditions with 1 ppm ethylene. Tissue sections were prepared at 24 h after the start of treatments. Bars, 100 µm. (B) Cell type-specific expression analysis of the RBOH and the MT genes. Semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) was performed. The alphanumeric symbols in parentheses indicate the Gene IDs of the Maizesequence database. The Ubiquitin (UBQ) was used as a control. Ste, stelar cells; Cor, cortical cells; OCL, outer cell layers. (C) Aerenchyma formation in maize primary roots at 24 h grown under waterlogged conditions with or without DPI treatment. All values are means (n = 4) ±SD.