Table 1. Expression Levels of Wall and Microtubule-Related Genes.

Gene Name		Relative Expression
		qua2	tsd2
Cellulose synthesis-related genes
	CESA1	0.58 ± 0.05**	0.48 ± 0.01**
	CESA3	0.69 ± 0.03*	0.51 ± 0.06*
	CESA6	0.50 ± 0.03*	0.43 ± 0.02**
	KOR1	0.42 ± 0.02**	0.33 ± 0.03**
	COBRA	0.72 ± 0.04*	0.70 ± 0.02*
	CSI1	0.54 ± 0.02**	0.42 ± 0.01**
Microtubule-related genes
	MAP20	0.59 ± 0.09*	0.86 ± 0.12
	MAP65-1	0.91 ± 0.02	0.87 ± 0.03
	MAP70-1	0.62 ± 0.04**	0.58 ± 0.01**
	MAP70-5	0.22 ± 0.01**	0.26 ± 0.02**
	CLASP	0.57 ± 0.05**	0.41 ± 0.04**
	FRA1	0.46 ± 0.01**	0.31 ± 0.04**
	KTN1	0.69 ± 0.04**	0.62 ± 0.04**
Cell wall integrity genes
	FER	0.65 ± 0.01*	0.56 ± 0.03*
	HERK1	0.36 ± 0.01**	0.31 ± 0.02**
	FEI1	0.68 ± 0.01**	0.50 ± 0.07**
	FEI2	0.70 ± 0.05*	0.59 ± 0.03**
	KIN13A	0.48 ± 0.02**	0.40 ± 0.01**
	THE1	0.41 ± 0.06*	0.25 ± 0.02**
	WAK1	0.94 ± 0.01	0.18 ± 0.03*
	WAK2	1.07 ± 0.31	0.42 ± 0.13*
	WAK3	1.68 ± 0.24	0.94 ± 0.23
	WAK4	0.99 ± 0.20	0.20 ± 0.06*
	WAK5	0.77 ± 0.29	0.15 ± 0.06**
Pectin-related genes
	GAE1	0.71 ± 0.10*	0.53 ± 0.04*
	GAUT1	0.68 ± 0.06*	0.65 ± 0.07*
	GAUT7	0.68 ± 0.09*	0.63 ± 0.06**
	GAUT8	1.08 ± 0.06	1.08 ± 0.03
	GAUT12	0.47 ± 0.07**	0.19 ± 0.02**
	GAUT15	1.04 ± 0.20	0.76 ± 0.03
	EXT3	1.66 ± 0.09*	2.16 ± 0.07**
	EXT4	5.79 ± 0.57**	5.25 ± 0.49**
	PME35	0.0065 ± 0.001**	0.0036 ± 0.003**

Detection of mRNA expression levels is shown from 3-d-old etiolated Col, qua2, and tsd2 seedlings by qPCR. EF1-a was amplified as an internal control. Expression levels in Col were normalized to 1, and the expression levels of target genes in qua2 and tsd2 seedlings were calculated relative to these values. Data present averages and sd (n = 3 technical replicates). Asterisks indicate significant differences (*, P < 0.05 and **, P < 0.001, Student’s t test). See also the Supplemental Table.