Institute of Plant Genetic Resources „К. Malkov „- Sadovo, 4122, Sadovo
Резюме
The aim of study is to determine the effect of NaCl salinity stress on germination
characteristics and seedling growth of 3 Bulgarian rye accessions - Milenium,
В7Е0131 and В7Е0055 maintained in the ex situ collection of the National genebank
of Bulgaria. Six different concentrations of NaCl (25, 50, 75, 100, 125 and 150 mM)
are used as treatments and deionized water is used as control. To determine the
salinity tolerance, the following germination characteristics - germination energy
(%), germination percentage (%), coefficient of velocity of germination (% day-1),
germination rate index and mean germination time (day), water uptake are studied.
The data for the shoot and root length (cm), fresh weight (mg plant-1) of shoot and
root and dry weight (mg plant-1) of shoot and root are measured seven days after
germination. Vigor index and solt tolerance index are also calculated. The effect of
increasing NaCl levels on germination energy and final germination percentages
are not recorded for В7Е0131 and В7Е0055. Increasing salinity concentration from
25 to 150 mM NaCl prolonged mean germination time and had an inhibitory effect
on the initial seedling growth. В7Е0055 is the most tolerant at seedling growth
stage.