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选用‘凯勒’等10个品种甜高粱种子为材料,分别用Na Cl和等渗的甘露醇进行处理,以鉴定各品种的抗盐性与抗旱性。结果表明:不同品种甜高粱种子在100 mmol·L-1 Na Cl和等渗的甘露醇处理下萌发和幼苗生长都受到了不同程度的抑制;对比盐处理组和干旱处理组,绝大多数品种的甜高粱种子的萌发参数和幼苗生长指标都没有显著性的差异,这说明盐胁迫抑制种子萌发的主要因素是由渗透胁迫造成的生理干旱;利用隶属函数值法对甜高粱在萌发期的7个生长生理指标进行综合评价,抗盐性强弱顺序为‘绿能1号’>‘济甜杂7号’>‘济甜杂10号’>‘济甜杂2号’>‘济甜杂11-6’>‘MN-3867’>‘能饲1号’>‘凯勒’>‘MN-94’>‘济甜杂12号’,抗旱性强弱顺序为‘绿能1号’>‘济甜杂2号’>‘济甜杂11-6’>‘济甜杂10号’>‘济甜杂7号’>‘MN-3867’>‘MN-94’>‘能饲1号’>‘济甜杂12号’>‘凯勒’,可以看出甜高粱在萌发期的抗盐性与抗旱性存在较强的正相关关系。
Ten varieties of sweet sorghum seeds such as ’Keller’ were selected as materials and treated with NaCl and isotonic mannitol respectively to identify the salt tolerance and drought resistance of the varieties. The results showed that the seed germination and seedling growth of different varieties of sweet sorghum seeds were inhibited to varying degrees under 100 mmol·L-1 NaCl and isotonic mannitol treatment. Compared with the salt-treated and the drought-treated groups, most of the varieties Of sweet sorghum seed germination parameters and seedling growth indicators are no significant differences, indicating that salt stress suppression of seed germination is the main factor caused by osmotic stress physiological drought; the use of membership function of sweet sorghum during germination 7 A comprehensive assessment of physiological indicators of growth, salt resistance of the order of ’green energy 1’> ’Jitiaza 7’> ’Jitiaza 10’> ’Jitiaza 2’> Jizhixia MN-3867> Nourishing 1> ’Keller’> ’MN-94’> ’Jitianza 12’, the order of drought resistance was ’Green No. 1’> ’Jitiaza 2’> ’Jitiaza 11-6’> ’Jitiaza 10’> ’Jitiaza 7’> ’MN-3867’> ’MN-94’> ’Nengxu No.1 ’Ji’tezhao12’ and ’Keller’, we can see that sweet sorghum has a strong positive correlation between salt resistance and drought resistance at germination stage.