Evaluating rice for salinity using pot-culture provides a systematic tolerance assessment at the seedling stage

Rice
Naqeebullah KakarK Raja Reddy

Abstract

Rice (Oryza sativa L.) is one of the major staple food crops consumed globally. However, rice production is severely affected by high salinity levels, particularly at the seedling stage. A good solution would be the development of an efficient screening methodology to identify genotypes possessing genes for salt tolerance. A new salinity tolerance screening technique using rice seedlings in pot-culture was tested. This method controls soil heterogeneity by using pure sand as a growth medium and minimizes unexpected extreme weather conditions with a movable shelter. Seventy-four rice genotypes were screened at three salinity treatments including high salt stress (electrical conductivity (EC) 12 dSm- 1), moderate salt stress (EC 6 dSm- 1), and control (no salt stress), imposed 1 week after emergence. Several shoot and root morpho-physiological traits were measured at 37 days after sowing. A wide range of variability was observed among genotypes for measured traits with root traits being identified as the best descriptors for tolerance to salt stress conditions. Salt stress response indices (SSRI) were used to classify the 74 rice genotypes; 7 genotypes (9.46%) were identified as salt sensitive, 27 (36.48%) each as low and moderat...Continue Reading

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Citations

Jul 23, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Hong MenJingjing Liu
Nov 17, 2021·Environmental Monitoring and Assessment·Ambikapathi RamyaS Venkataramani

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Methods Mentioned

BETA
salt stress
salt treatments
PCA

Software Mentioned

SAS
SigmaPlot
WinRHIZO
Sigma Plot

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