Abstract
The interaction between phosphorus (P) and other media components alters root development and masks the plant response and thus limits the ability to correctly identify P-deficiency response (pdr) mutants. This study aims to assess changes in root development caused by different composition of growth media normally used in Arabidopsis research and to study their effects on pdr-mutant screening. Primary root growth of four genotypes was analyzed in media differing in P concentrations: half-strength Murashige and Skoog (½ MS) and Somerville and Ogren (SO). The effects of nitrogen source and Fe on root growth were investigated in each medium separately and in a mixture. We found that the primary root length of all genotypes grown on ½ MS was reduced in comparison with plants grown on SO medium. The mutant pdr9 was the most sensitive in ½ MS, This mutant was also hypersensitive to Fe that intensified its sensitivity to ammonium. Ammonium increased the root inhibition caused by Fe also in wild-type plants. In conclusion, on the basis of our study we recommend to use SO medium, which ensures an efficient selection to screen for pdr mutants through root growth. Moreover, nitrogen sources in the media other than nitrate should be taken carefully.
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Abbreviations
- MS:
-
Murashige and Skoog
- pdr1 :
-
phosphate deficiency response1
- PHR1:
-
phosphate starvation response 1
- QC:
-
quiescent center
- SO:
-
Somerville and Ogren
- WT:
-
wild type
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Acknowledgments: This work was supported by the Brazilian National Council for Scientific and Technological Development (CNPq) Grants No. 473050/2006-4 and 470173/2010-6. MLS received a pre-doctoral fellowship (Proc. 140725/2006-7 and 201660/2007-5) and CAD received PQ-1D fellowship (Proc. 305122/2014-2) from CNPq.
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Strieder, M.L., Pinto, K.G., Bertoldi, C. et al. Response of Arabidopsis thaliana root growth to phosphorus and its relation to media chemical composition. Biol Plant 61, 587–594 (2017). https://doi.org/10.1007/s10535-017-0713-z
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DOI: https://doi.org/10.1007/s10535-017-0713-z