Differential Responses of Rice (Oryza sativa L.) Cultivars to NaCl in Relation to Physiological and Biochemical Parameters at Seedling Stage

Sagar Datir¹*, Bilwa Kulkarni² and Neeta Patil²

¹Department of Biotechnology, Savitribai Phule Pune University, Pune, India
²Postgraduate Research Centre, Department of Botany, Modern College of Arts, Science and Commerce, Shivajinagar, Pune, India

*Corresponding Author: Sagar Datir, Department of Biotechnology, Savitribai Phule Pune University, Pune, India.

Received: December 28, 2018; Published: January 12, 2018

Citation: Sagar Datir., et al. “Differential Responses of Rice (Oryza sativa L.) Cultivars to NaCl in Relation to Physiological and Biochemical Parameters at Seedling Stage”. Acta Scientific Agriculture 2.2 (2018).

Abstract

  Rice is one of the most important staple food crops in world and relatively susceptible to salinity. Effects of NaCl were studied on six rice cultivars viz. Ratnagiri-24, Ratnagiri-711, Ratnagiri-4, Palghar-2, Karjat-2 and Karjat-184 under control (0 mM) and increasing levels of salinity (50 mM, 100 mM, 150 mM and 200 mM) at seedling level. Differential responses of rice cultivars were observed in relation to salinity levels. As the level of salinity increases, an apparent reduction in germination %, shoot length, root length, root/shoot ratio, seed vigor index and photosynthetic pigments in all the cultivars were revealed. Of all the cultivars, these parameters were less affected in Ratnagiri-24 and Ratnagiri-711. The levels of proline were high under salt stress (200 mM), however, it remained exceptionally higher in Karjat-2 followed by Palghar-2 as compared to rest of the cultivars. Proline exhibited highly significant correlations with most of the physiological parameters (p < 0.05). Based on these parameters, rice cultivars can be classified into three groups. Group I includes Ratnagiri-24 and Ratnagiri-711 as highly salt tolerant while group II consist of Ratnagiri-711, Palghar-2 and Karjat-2 as moderately salt sensitive. Group III comprises highly salt sensitive cultivar Karjat-184.

Keywords: Proline; Rice; Root Length; Salinity; Shoot Length

Copyright: © 2018 Sagar Datir., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.