Spatial gradients in cell wall composition and transcriptional profiles along elongating maize internodes

BMC Plant Biology

Table 1 Differential expression of cell wall genes in an elongating maize internode

Sections	Number of genes changed by 2-fold or more (%)	% of differentially transcribed genes between any two sections
Sections	Number of genes changed by 2-fold or more (%)	S2	S3	S4	S5	S6	S7	S8	S9
S2	214 (23)
S3	418 (45)	54
S4	390 (42)	56	15
S5	370 (40)	52	27	26
S6	389 (42)	54	32	30	13
S7	408 (44)	61	30	27	30	27
S8	389 (42)	56	34	33	18	10	24
S9	372 (40)	58	33	31	16	10	22	10
S10	386 (41)	59	34	34	26	20	22	15	23

The 4 × 44 microarray chips contained 17200 putative functional genes. About 5% (930 genes) of them was found to code for cell wall metabolic proteins. While Section S1 was taken as the control, the number of genes with a change in signal intensity by 2- or more than 2-fold (both down and up-regulated) was calculated for other sections (showing in column 2). The percentage overall cell wall genes was listed in brackets. The differential transcription between any two adjacent sections was also calculated and is shown in columns 3 – 10.

ISSN: 1471-2229