In:
Scientific Reports, Springer Science and Business Media LLC, Vol. 8, No. 1 ( 2018-09-11)
Kurzfassung:
High magnesium (Mg 2+ ) in some extreme serpentine soils or semi-arid regions is an important factor affecting crop growth and development. Specific loci that form the genetic framework underlying high Mg 2+ homeostasis, however, are not well understood. By using GWA mapping on 388 accessions of Arabidopsis thaliana selected from a worldwide collection and genotyped at approximately 250,00 SNPs, we successfully identified 109 and 74 putative genetic regions associated in nutrient traits under normal (1,000 µM) and high Mg 2+ (10,000 µM), respectively. Above 90% SNPs associated with nutrients including Mg 2+ and only two SNPs shared between normal and high Mg 2+ . A single strong peak of SNPs associated with Ca concentration corresponding to candidate gene At1g604 2 0 ARABIDOPSIS NUCLEOREDOXIN ( AtNRX1 ) under high Mg 2+ was further determined. Compared with wildtype, mutants of Atnrx1-1 and Atnrx1- 2 supplied with high Mg 2+ had higher Ca concentrations in the plant, and higher cytosolic Ca 2+ concentrations during root elongation, as well as higher fresh weight and lateral-root number. This suggests that AtNRX1 was a critical gene negatively regulating Ca uptake under high Mg 2+ conditions. The discovery could help to breed/select crops that can adapt to high-Mg 2+ soils such as serpentine soils (high ratio of Mg 2+ : Ca 2+ ) or Mars soil with high levels of magnesium sulfate.
Materialart:
Online-Ressource
ISSN:
2045-2322
DOI:
10.1038/s41598-018-31950-0
Sprache:
Englisch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2018
ZDB Id:
2615211-3
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