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. 2009 Jul 23;60(13):3891–3908. doi: 10.1093/jxb/erp234

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© 2009 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)

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Fig. 4. — Effect of heat stress on the expression profiles of small heat shock protein (sHSP; A), HSP70 (B), and ascorbate peroxidase (APX; C) family members and of genes involved in transcription regulation (D) in maturing microspores. Expression values presented here correspond to the normalized, log base 2, mean expression values of heat-stressed (12 replicates) and control (12 replicates) microspores. Genes whose expression levels differ significantly (P <0.05) between HS and control conditions [based on the procedure described in the section ‘Array hybridization and statistical analysis’, using the LIMMA package (Smyth, 2004)] are marked by an asterisk. More details regarding the plant material and the experimental procedure are given in the legend to Fig. 3 and in Materials and methods. Only the genes represented on the Tomato Affymetrix array were analysed. Gene names are abbreviated according to the nomenclature used by the NCBI, and the corresponding accession or AGI numbers as well as Affy ID numbers appear in Table 1 and in Supplementary Table S3 at JXB online. CI, class I; CII, class II; MT, mitochondrial; LeER, L. esculentum endoplasmic reticulum. HSC-70-1 represents the BT013586 sequence. The gene sequences of the ascorbate peroxidase (APX) family members present on the microarray were annotated according to Najami et al. (2008) as follows: BM4119001 (SlAPX1), BG626096 (SlAPX2), BM410706 (SlAPX3), BG630221 (SlAPX5), AI775047 and BI208755 were annotated as SlAPX4-like and SlAPX6-like genes because of 89% and 84% identity to the DQ131130 and DQ029334 sequences, respectively, and AF413573 as SlTAPX. Affy ID numbers for all the genes that do not appear in either Table 1 or Supplementary Table S3 are as follows: AtHSC70-1, Les.4819.1.S1_at; SlAPX1, Les.247.3.S1_at; SlAPX2, Les.247.1.S1_a_at; SlAPX4, LesAffx.14867.1.S1_at; SlAPX5, Les.1230.1.A1_at; SlAPX6, LesAffx.25588.1.S1_s_at; SlTAPX, Les.2999.1.S1_at; LeCBF1, Les.124.1.S1_at; LeDREB2, Les.3984.1.S1_at; LeDREB3, Les.3379.1.S1_at.