Tolerance limits of Indonesian rice varieties to drought and salinity in germination phase using PEG and NaCl as selection agents

Abstract

This research aims to study tolerance limit of various Indonesian rice varieties to drought and salinity in germination phase using PEG and NaCl as selection agents and to obtain a resistance benchmarks of the rice varieties on drought and or salinity. Two sets of experiments were conducted, both set using Split Plot design, to analyse the plant tolerance to drought and salinity stress, respectively. Four levels of salinity i.e. Control, EC 4, 6 and 8 mmhos/cm, respectively were used in the first experiment and four levels of drought condition in the second experiment i.e. control, -0.33, -0.67 and -1.0 MPa, respectively. 25 varieties used in both experiments were germinated using wet papers previously applied with PEG and NaCl. High genetic diversity was shown by the rice varieties with the highest heritability index (H>0.7) on the PEG and NaCl with concentration of -0.67 MPa and 6 mmhos/cm, respectively. The tolerance limit of the rice varieties to salinity was on the NaCl concentration of 6 g.L-1, while to drought was on the PEG concentration of 100 g.L-1 (-0.67 MPa). Parameters that can be used as benchmarks for tolerance to drought and salinity in the germination phase were vigor index, radicle and plumula length.

Access to Document

Other files and links

• Link to publication in Scopus
• Open Access Version Available

Fingerprint