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以分布于准噶尔荒漠的木地肤为材料,研究了木地肤种子在4个温变周期(5/2℃、15/2℃、25/15℃、30/15℃,光12 h/暗12 h)下以及0.0~4.0mol/L NaCl溶液中的萌发。结果表明:木地肤种子萌发的适宜温周期为30/15℃和25/15℃,萌发率均大于85%;低温周期(5/2℃、15/2℃)明显抑制种子的萌发。低浓度的NaCl盐溶液(≤0.1mol/L)促进木地肤种子萌发,有一定的增效效应;小于0.6mol/LNaCl盐溶液对种子累积萌发率(≥80%)无显著影响;NaCl浓度大于1mol/L后,随着盐浓度的增加,盐度与萌发率呈显著负相关关系;盐胁迫解除后,种子具有一定的恢复萌发能力,随着盐浓度的不断增加,种子的恢复萌发率逐渐下降;在NaCl盐溶液高达2.0、4.0mol/L时,恢复萌发率为36%和39.6%。
In this study, the seedlings of A. koraiensis were cultivated in the woody soil distributed in the Junggar desert at four temperature cycles (5/2 ℃, 15/2 ℃, 25/15 ℃, 30/15 ℃, light 12 h / dark 12 h) and 0.0 ~ 4.0 mol / L NaCl solution. The results showed that the optimum temperature for seed germination was 30/15 and 25/15, and the germination rate was more than 85%. Seedling germination was obviously inhibited by low temperature (5/2 ℃, 15/2 ℃). Low concentrations of NaCl salt solution (≤0.1mol / L) could promote the seed germination of Kadsura toxoplorata with some synergistic effects. The salt concentration of less than 0.6mol / L NaCl had no significant effect on the cumulative germination percentage (≥80%); NaCl concentration When the salt concentration was higher than 1 mol / L, salinity and germination rate had a significant negative correlation with salt concentration. After the salt stress was relieved, the seed had a certain ability to restore germination. With the increasing salt concentration, the seed germination rate Gradually decreased. When NaCl salt solution reached 2.0 and 4.0 mol / L, the germination rate was 36% and 39.6%, respectively.