Heat-responsive nat-siRNAs derived from Bra040444/ Bra040445 cis-NAT pair and expression of their homologs in Arabidopsis. (A) Assembled transcript models of Bra040444 in four RNA-seq datasets. (B) Assembled transcript models of Bra040445 in four RNA-seq datasets. Nat-siRNAs were derived from the strands of Bra040444 (top of gene pairs), or of Bra040445 (bottom). The red lines indicate heat-induced nat-siRNAs in high-temperature libraries, and black ones indicate nat-siRNA in normal-temperature libraries. (C) Expression of AT3G63300, a homolog of Bra040444, and AT3G63310,a homolog of Bra040445, under abiotic stress (AtGenExpress Visualization Tool). Blue rectangles indicate the original coding sequence model without untranslated regions; red rectangles indicate Brassica rapa ssp. pekinensis cv. Bre seedling; orange rectangles indicate in B. rapa ssp. chinensis cv. Wut seedling; green rectangles indicate cv. Bre inflorescence apex; pink rectangles indicate cv. Wut inflorescence apex.