Effect of NaCl on the germination and growth parameters of some flax varieties (Linum usitatissimum L.)‎

Abstract EN

As a result of the phenomenon of climate change, drought and salinity are becoming an actual challenge to agriculture crop production.

flax is also one of the important agricultural crops that face the problem of salinity, that is why the study of its salinity tolerance level an inevitable in order to not just keep its production level, but also increased it that can answer to the population marketers demand for the world population.

seeds of flax varieties (Linum usitatissimum L) Syria, Rabar variety and hikmat variety where tested of salinity tolerance with four levels of salt solution in sterilized water (0.02, 0.04, 0.06 and, 0.08 molL-1) and control, that the e given salt solutions are equivalent to 1.7, 2.3, 3.5 and 4.7 gL-1 of NaCl, that answer to 1.8, 3.6, 5.5, and 7.3 Sd / m respectively the results shows clearly significant effect of varieties on germination percentage, speed and index, and significant decreasing of germination percentage, germination speed and germination index by increasing salinity levels.

regarding growth issue, the results show significant effect of varieties on and growth parameters except of root wet weight which has no significant effect by varieties.

rebar variety exceed over Hiklmat variety and Syria variety by its only higher value of root wet weight.

but Hikmat variety exceed over rebar and Syria by it is highest value of root numbers and shoot length, and Syria exceed over Hikamt variety and Raber variety by root try weight, shoot wet and dry weight as well as root length.

with increasing salinity levels decrease growth parameters, except of shoot dry weight that control has less value in relation to other salt levels and is equal to 4.7 gL-1.

the explanation to this instance, that control has less weigh value in relation to other salt levels, is because of accumulation of more salt substances in shoots in salt solution levels in compare with control, and the same explanation is valid to the result of root too.

significant interaction between salt levels and varieties about germination parameters indicate that Raber variety has is the supreme variety which tolerate better salinity in relation to Hikmat and Syria.

reducing root numbers and length due to salinity has significant effect on the tolerance degrees of plants, as the longer and more root number, the better for plants to penetrate soil and cover more area in soil, which make plant to tolerate more salinity and drought.

1.7 gL-1 which answer to 1.8 Sd / m is the tolerance level of flax to soil salinity, in this regard, rebar has the height value of germination parameters at all salt levels, and by comparative way Rabar can also tolerate salt level (2.3 gL-1) too that answer to 3.6 Sd / m, because 2.3 gL-1 of Rabar variety almost equal or even higher then (1.7 gL-1) in some germination parameter of Hikamt variety and Syria variety, therefore, Rabaer variety can tolerate in a soil from 1.8 Sd / m to 3.6 Sd / m, but Hikmat variety and Syria cannot tolerate soil salinity above 1.8 Sd / m.