Effect of salinity on morpho-physiological traits at reproductive stages of Oryza sativa

S Sultana,Ma Mia,M Dhar,Th Shabi,Akmz Hossain,Mh Kabir,A Sagar

doi:10.3329/pa.v32i2.58396

Abstract

Soil salinity is one of the most adverse environmental problems which restricts crop yield. Salinity affects rice plants very badly from germination to its maturity. Therefore, a pot experiment was conducted to study the salinity tolerance of rice genotypes viz. SAL655, STL15, PBRC37, Binadhan-8 and BRRI dhan28. The plants were grown under four salinity levels (0, 6, 9 and 12 dSm−1). Plant height, total number of green leaves hill−1, root dry weight, stem dry weight, total dry weight per hill, root shoot ratio was found to be decreased gradually with gradual increase in salinity levels as compared to the control. The genotype Binadhan-8 and PBRC37 showed the better performance in respect of all the parameters than other genotypes. Therefore, Binadhan-8 and PBRC37 were found more tolerant than other genotypes to salt stress. Progressive Agriculture 32 (2): 117-126, 2021

Highlights

Salinity is considered as one of the important physical factors influencing rice production
The effect of different levels of salinity was significant on plant height, total number of green leaves hill−1, number of affected leaves hill−1, root dry weight, stem dry weight, total dry weight, and root shoot ratio
The highest plant height, total numbers of green leaves/hill, root dry weight, stems dry weight, total dry weight, root shoot ratio were observed in control plant

Summary

Introduction

Salinity is considered as one of the important physical factors influencing rice production. Salinity is the most widespread soil problem in different countries (Roy et al, 2018; Sagar et al, 2019) and is considered as a serious constraint to increased rice production worldwide (Flowers and Yeo, 1981; Chen et al, 2021). There exists tremendous variation for different abiotic stresses such as salt stress within species in rice (Thomson et al, 2010; Khaton et al, 2016; Roy et al, 2018; Rauf et al, 2020; Sagar et al, 2020), providing opportunities to improve crop saltstress tolerance through genetic means. Rice (Oryza sativa L.) is one of the most important world food crops, serving as the staple food for over one-third of the world’s population (Sen et al, 2020).

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Conclusion