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Iron tolerance in rice: an efficient method for performing quick early genotype screening.

Adriana Pires Soares Bresolin¹, Railson Schreinert Dos Santos², Roberto Carlos Doring Wolter³

¹Universidade Federal do Pampa (UNIPAMPA), Itaqui, RS, Brazil.

BMC Research Notes

|June 27, 2019

Summary

This study developed a fast and affordable method to screen rice cultivars for iron excess tolerance. Sensitive rice varieties accumulate more iron in shoots, providing a reliable indicator for breeding programs.

Keywords:

Efficient method Hydroponic culture Iron toxicity Lowland rice

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Area of Science:

Plant Science
Agronomy
Biochemistry

Background:

Iron (Fe) excess is a significant abiotic stress affecting rice (Oryza sativa L.) production.
Developing efficient screening methods for iron tolerance is crucial for crop improvement.

Purpose of the Study:

To establish an early, rapid, and cost-effective screening method for iron excess tolerance in rice cultivars.
To identify physiological and biochemical markers associated with iron tolerance.

Main Methods:

Cultivar screening under controlled iron excess conditions.
Measurement of shoot length (SL) as a phenotypic indicator.
Quantification of iron (Fe) and other mineral (Zn, Mn, Cu) accumulation in rice tissues.
Correlation analysis of mineral content and tolerance levels.

Main Results:

Reduced shoot length (SL) is a reliable indicator of iron excess sensitivity.
Sensitive rice genotypes exhibit higher iron accumulation in shoots compared to tolerant ones.
Iron excess significantly alters Zn and Mn content, with strong positive correlations between Fe, Zn, and Mn accumulation.

Conclusions:

Shoot iron concentration serves as an efficient and accurate method for characterizing rice cultivars' response to iron excess.
This screening method can aid in identifying and breeding iron-tolerant rice varieties.