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以4种菊芋为试验材料,研究不同浓度(0、50、100、150mmol/L)混合盐碱(Na2CO3、Na HCO3、Na Cl和Na2SO4)胁迫对种子萌发及幼苗生长的影响,为菊芋在盐碱化土地上种植提供参考。结果表明,除菊芋Ht B外,其他3份菊芋的发芽率随胁迫强度的增加均呈不同程度的降低。同时,Y150处理(Na2CO3∶Na HCO3∶Na Cl∶Na2SO4为5∶23∶9∶5)下,菊芋Ht B、Ht L和Ht D的发芽时间均受到了调控。盐碱胁迫抑制4种菊芋幼苗的生长,尤其在Y150处理下,菊芋的株高和地上鲜重均显著低于对照(P<0.05)。不同盐碱浓度处理Ht L叶片脯氨酸含量迅速增加,且显著高于对照(P<0.05)。4种菊芋叶片中超氧化物歧化酶(SOD)活性随胁迫强度的增加均呈先升高后降低的趋势。在同一处理条件下,4种菊芋相同指标的变化率不同,说明他们的耐盐碱能力不同。
Four Jerusalem artichoke cultivars were used to study the effects of different concentrations (0, 50, 100 and 150 mmol / L) of mixed saline alkali (Na2CO3, Na HCO3, Na Cl and Na2SO4) on seed germination and seedling growth. Alkaline land planting for reference. The results showed that the germination rate of three other Jerusalem artichoke decreased with the increase of the stress intensity except Jerusalem artichoke Ht B. At the same time, germination time of Ht B, Ht L and Ht D in Jerusalem artichoke was regulated under Y150 treatment (Na2CO3: NaHCO3: NaCl: Na2SO4: 5: 23: 9: 5) Saline-alkali stress inhibited the growth of four kinds of Jerusalem artichoke seedlings. Especially under Y150 treatment, the plant height and fresh weight of Jerusalem artichoke were significantly lower than those of the control (P <0.05). The content of proline in leaves of Ht L treated with different saline-alkali concentrations increased rapidly, and was significantly higher than that of the control (P <0.05). The activities of superoxide dismutase (SOD) in four kinds of Jerusalem artichoke leaves increased first and then decreased with the increase of the stress intensity. Under the same treatment conditions, the rate of change of the same indicators of the four kinds of Jerusalem Artichoke differs, indicating that they have different saline-alkali tolerance capabilities.