Abstract
Phosphorus is an essential nutrient required for soybean growth but is bound in phytic acid which causes negative effects on both the environment as well as the animal nutrition. Lowering of phytic acid levels is associated with reduced agronomic characteristics, and relatively little information is available on the response of soybean plants to phosphorus (P) starvation. In this study, we evaluated the effects of different P starvation concentrations on the phytic acid content, growth, and yield of seven mutant genotypes along with the unirradiated control, JS-335, in a hydroponics growth system. The low phytic acid containing mutant genotypes, IR-JS-101, IR-DS-118, and IR-V-101, showed a relatively high growth rate in low P concentration containing nutrient solution (2 μM), whereas the high P concentration (50 μM) favored the growth of IR-DS-111 and IR-DS-115 mutant genotypes containing moderate phytate levels. The mutant genotypes with high phytic acid content, IR-DS-122, IR-DS-114, and JS-335, responded well under P starvation and did not have any significant effect on the growth and yield of plants. Moreover, the reduction of P concentration in nutrient solution from 50 to 2 μM also reduced the phytic acid content in the seeds of all the soybean genotypes under study. The desirable agronomic performance of low phytic acid containing mutant genotype IR-DS-118 reported in this study suggested it to be a P-efficient genotype which could be considered for agricultural practices under P limiting soils.
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Abbreviations
- PCA:
-
Principal component analysis
- PA:
-
Phytic acid
- SDW:
-
Seed dry weight
- SHDW:
-
Shoot dry weight
- SY:
-
Seed yield
- KOH:
-
Potassium hydroxide
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Acknowledgments
The authors are grateful to the Indian Council of Agricultural Research, Ministry of Agriculture, Govt. of India for funding the National Fund Project (NASF) to carry out this research work. They are also thankful to Dr. S. K. Lal, Division of Genetics, IARI, New Delhi, for providing seeds of the different mutant genotypes.
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The authors declare that they have no competing interests.
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Kumar, V., Singh, T.R., Hada, A. et al. Probing Phosphorus Efficient Low Phytic Acid Content Soybean Genotypes with Phosphorus Starvation in Hydroponics Growth System. Appl Biochem Biotechnol 177, 689–699 (2015). https://doi.org/10.1007/s12010-015-1773-1
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DOI: https://doi.org/10.1007/s12010-015-1773-1