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Journal of Radioanalytical and Nuclear Chemistry

, Volume 322, Issue 2, pp 655–662 | Cite as

14C labelling as a reliable technique to screen soybean genotypes (Glycine max (L.) Merr.) for iron deficiency tolerance

  • Kiran Karthik RajEmail author
  • R. N. Pandey
  • Bhupinder Singh
  • A. Talukdar
Article

Abstract

Fifty diverse soybean genotypes were screened for their ability to tolerate iron deficiency stress in a hydroponics experiment with low iron (−Fe) and sufficient iron (+Fe). We hypothesised that the genotypes with higher root exudation potential would exhibit higher chlorophyll content, dry matter production and Fe acquisition. The relative root exudation capacity of the genotypes was estimated with the help of 14C. As compared to iron inefficient and non responsive (FeINR) category under sufficient availability of iron (+Fe), the average 14C content in the total root exudates (14CTRE) was 39.4% higher in iron efficient and responsive (FeER) category. Further, higher exudation was observed under iron limiting (−Fe) stress condition and reported maximum in FeER (110.0% increase over FeINR under +Fe condition). The strength of positive correlation between 14C released with other parameters related to iron deficiency chlorosis suggested that 14C could be effectively used as a tracer for providing reliable estimate for better screening of iron efficient and responsive categories of soybean genotypes.

Keywords

Iron deficiency chlorosis 14Soybean Screening Root exudates 

Notes

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Soil Science and Agricultural ChemistryICAR-Indian Agricultural Research InstituteNew DelhiIndia
  2. 2.Nuclear Research Laboratory, Centre for Environment Science and Climate Resilient Agriculture (CESCRA)ICAR-Indian Agricultural Research InstituteNew DelhiIndia
  3. 3.GeneticsICAR-Indian Agricultural Research InstituteNew DelhiIndia
  4. 4.Natural Resource ManagementICAR-Central Island Agricultural Research InstitutePort BlairIndia

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