盐胁迫对黍子种子萌发的影响

Effect of Salt Stress on the Seed Germination of Panicum miliacea

选取浓度为0．4％、0．8％、1．2％、1．6％、2．0％、2．4％的NaCl、MgCl2和Na2SO4对黍子种子进行发芽试验。结果表明：黍子种子在不同种类的盐胁迫下发芽率、发芽势、发芽指数、发芽值均低于对照组，且随着盐浓度的升高而降低。在NaCl、Na2SO4及MgCl2胁迫下，黍子种子萌发可忍耐的浓度范围分别为0％～1．2％、0％～1．6％、0％～2．0％。3种单盐胁迫条件下对黍子种子萌友的抑制作用依次为NaCl〉Na2SO4〉MgCl2。

Our objective was to compare the germination ability of the saline-tolerant millet. Applied NaCl, MgCl2 and Na2SO4 at concentrations of 0. 4 %,0. 8%,1.2 %, 1.6%,2. 0 %, 2.4 % for salt stress treatments and recorded germination percentage, relative germination percentage, germination energy, relative germination energy, relative germination index, germination value etc. The results showed that under salt stress the germination rate was lower than the control and declined with increasing of salinity in general. The seed germination reduced significantly when the solution of NaCl above 1.2%. In MgCl2 and Na2SO4 solution, the concentrations of 2.0% and 1.6% had the significant effects on the seed germination respectively. Generally, the order of tolerance of millet seeds under salt stress was MgCl2, Na2SO4 and NaCk.