Abstract
Plants develop a series of physiological, biochemical, and molecular responses to survive in drought stress. Many drought-related genes with various functions which regulated by ABA-dependent and independent pathways have been identified in wheat. However, studies on the effect of biostimulants on drought-related genes are limited and unclear. As a biostimulant, humic acid (HA) has enormous roles on plant growth, yield, and protection of resistance in various abiotic stresses, but its relation to drought-related genes is unknown. Here, we aimed to determine the relationships between drought stress generated by − 6 bar and − 8 bar PEG6000 and ABA and HA treatments on total oxidant status (TOS) and total antioxidant status (TAS) and expression of miRNA target genes (AP2, GRF, LAC, CSD1/CSD2, and Plastocyanin) on tolerant (Aksel 2000 and Kırkpınar 79) and susceptible (Atlı 2002 and Kırmızı Kılçık) bread wheat (Triticum aestivum L.) genotypes. According to the results, the expression of the genes varied depending on genotype and tissue and it was determined whether the genes used ABA-dependent or ABA-independent mechanisms to provide tolerance to stress in our promoter analysis. Also, the irregularities of the biochemical changes and expression of genes that were caused by PEG6000 could be improved by HA considering the positive effects on genes.
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13 November 2021
A Correction to this paper has been published: https://doi.org/10.1007/s11105-021-01322-6
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This study was funded by Ataturk University Research Funds (project no: 2015/346).
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E. Arslan and M. Aydin performed the measurements and wrote the manuscript. G. Agar participated in the planning of the study, data analysis, and writing of the manuscript.
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Drought is becoming a threat to the effect of increasing global warming. Wheat is an important and necessary food for the growing human population. The effect of humic acid was determined on some drought-related and ABA-dependent or independent gene expressions.
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Table S1
The cis-acting elements present in the promoter region of the AP2 (PDF 115 kb)
Table S2
The cis-acting elements present in the promoter region of the GRF (PDF 223 kb)
Table S3
The cis-acting elements present in the promoter region of the LAC (PDF 147 kb)
Table S4
The cis-acting elements present in the promoter region of the CSD1/CSD2 (PDF 240 kb)
Table S5
The cis-acting elements present in the promoter region of the Plastocyanin (PDF 221 kb)
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Arslan, E., Agar, G. & Aydin, M. Humic Acid as a Biostimulant in Improving Drought Tolerance in Wheat: the Expression Patterns of Drought-Related Genes. Plant Mol Biol Rep 39, 508–519 (2021). https://doi.org/10.1007/s11105-020-01266-3
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DOI: https://doi.org/10.1007/s11105-020-01266-3