Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 1
Written by Gergana DESHEVA, Manol DESHEV, Evgeniya VALCHINOVA, Albena PENCHEVA, Bozhidar KYOSEV
The objective of this study was to evaluate the genotypes of barbed goatgrass (Aegilops triuncialis L.) for tolerance to NaCl salinity stress at germination and the early stages of plant growth. Seeds from five populations of Aegilops triuncialis L. were collected from disparate regions of Bulgaria and subjected to salt stress at six distinct NaCl concentrations (50, 100, 150, 200, 250 and 300 mM). The genotypes exhibited considerable variation for the germination and seedling characteristics examined under both control and salinity-stress conditions. The highest value of the relative injury rate was recorded when seeds were treated with 300 mM NaCl. The application of increasing concentrations of the NaCl prolonged the mean germination time and suppressed the studied germination and seedling traits and had a greater inhibitory effect on shoot growth compared to root growth. Genotype BGR43665 was identified as the most tolerant to salinity stress, when exposed to increasing concentrations of sodium chloride ranging from 50 to 250 mM, on the base of the indices values for Mean productivity (MP), Geometric mean productivity (GMP), Harmonic mean (HM), Stress tolerance index (STI), Yield index (YI), Yield stability index (YSI), Relative stress index (RSI), calculated on the based of shoot dry mass. The average of the summary ranks (ASR) also identified BGR43665 as the best genotype.
[Read full article] [Citation]
