All 7 memory genes described in our earlier study [ 9] were present in the memory category in the genome-wide RNA-Seq data (Additional file 4: Table S4).
Fourth, conserved homologous genes in the two species that display transcriptional memory but in different memory categories illustrate specific modifications of the memory responses during the evolution of the response systems under repeated dehydration stress occurrences.
Five families (AP2/ERF, bHLH, Homeodomain-Zip, MYB/Myb-like, and ZF) are represented in all memory categories; GRAS and HSF members display only and memory, and the CAAT family is represented only by memory genes.
The distribution of transcript levels for the dehydration stress-responsive memory genes in S1 and S3 illustrating the four memory categories is shown.
These criteria were selected to represent a country's educational and living standards for the birth years of the interviewees, and then compared with participants' cognitive performance.That performance was determined using tests for episodic memory (the retention of words in memory), category fluency (naming examples of, say, animals) and numeracy.
Within this response fraction, genes that display significantly different transcript levels in S3 compared to S1 define the memory category, while genes that produce transcripts in S3 at comparable levels as in S1 comprise the non-memory category.
Diverse and gene-specific mechanisms regulate transcription memory behavior of dehydration stress genes even for genes belonging in the same memory category [ 37].
Within the dehydration response fraction, 816 genes (~40%) provided different responses in S3 constituting the maize transcription memory category, while 1246 genes produced similar transcript amounts upon each stress treatment representing maize 'non-memory' genes (Table 1; Additional file 3).
Given the limited number of TF families represented by 1 3 genes per family in Z. mays (Table 2; Additional file 7), the memory genes encoding NAC family TFs (amounting to ~50% of all TFs from the memory category) and the memory genes encoding Integrase-type AP2/ERF family, are standing out as exclusive features of the Z. mays TF memory genes.
There was no significant interaction of PiB retention and rAMNART on tests of memory, category generation, working memory, visuospatial perception, and CDR status, although virtually all coefficients for the interactions were in the predicted direction.
