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采用盆栽试验,设置0、0.15%、0.30%和0.45%等4个浓度的盐胁迫,通过出苗速度、植株形态和生物量等指标研究不同基因型花生(Arachis hypogaea)品种(系)萌发至幼苗期的耐盐性差异。结果表明,各浓度盐胁迫下,相对出苗时间、相对株高、相对主茎高、相对主根长、相对地上部鲜质量、相对地下部鲜质量、相对植株鲜质量、相对地上部干质量、相对地下部干质量和相对植株干质量等10个指标耐盐指数品种间呈正态分布,变异较大。主成分分析将10个指标归结为不相关的独立因子,采用综合得分将107个品种(系)聚类为高度耐盐型、耐盐型、盐敏感型和高度盐敏感型4组,0.15%浓度下4个类型品种数分别占供试材料的45.79%、39.25%、7.48%和7.48%;0.30%浓度下4个类型品种(系)数分别占供试材料的11.21%、47.66%、22.43%和18.69%;0.45%浓度下4个类型品种(系)数分别占供试材料的6.54%、23.36%、50.47%和19.63%。部分品种(系)在各强度盐胁迫下均表现为耐盐或盐敏感,部分品种(系)在低强度胁迫下表现为耐盐,而在高强度胁迫下表现为盐敏感。3个浓度盐胁迫下高度耐盐型、耐盐型、盐敏感型和盐高度敏感型分组一致的品种(系)分别有1个(‘阜花11’)、7个(‘花育28’、‘Z11’、‘花育39’、‘花育32’、‘HLN2’、‘粤油26’、‘XE019’)、0个和1个(‘D1035’)。盐胁迫下,不同耐盐类型花生品种(系)出苗时间、植株形态和生物量等10个指标间差异达显著或极显著水平,盐敏感类型比耐盐类型品种(系)出苗时间延长,植株形态建成抑制加重,物质积累减少。
Pot experiments were conducted to study the effects of salt stress on the seedling growth and seedling development of Arachis hypogaea (Arachis hypogaea) seedlings at seedling concentrations of 0, 0.15, 0.30 and 0.45% Salt tolerance differences. The results showed that under the salt stress, the relative emergence time, relative plant height, relative main stem height, relative main root length, relative fresh weight of upper part, relative fresh weight of fresh part, relative fresh weight of plant, relative dry weight of upper part, The underground dry weight and relative dry weight of 10 indicators of salt tolerance index showed a normal distribution between varieties larger variation. The principal component analysis included 10 indicators as independent independent factors. 107 varieties (lines) were clustered into 4 groups with high salt tolerance, salt tolerance, salt sensitivity and high salt sensitivity using 0.15% The four varieties accounted for 45.79%, 39.25%, 7.48% and 7.48% of the tested materials at the concentration of 0.30% and 11.21%, 47.66% and 22.43 % And 18.69%, respectively. The percentages of the four genotypes at the concentration of 0.45% accounted for 6.54%, 23.36%, 50.47% and 19.63% of the tested materials respectively. Some cultivars (lines) showed salt tolerance or salt sensitivity under salt stress. Some varieties (lines) showed salt tolerance under low stress but salt sensitive under high stress. Three cultivars (lines) with the highest concentration of salt-tolerant, salt-tolerant, salt-sensitive and salt highly sensitive groups under salt stress were 1 (Fu Fu 11), 7 , ’Z11’, ’Huayu 39’, ’Huayu 32’, ’HLN2’, ’Yueyou 26’, ’XE019’), 0 and 1 (’D1035’). Under salt stress, the differences of emergence time, plant morphology and biomass among 10 salt-tolerant peanut varieties (lines) were significant or extremely significant, the salt-sensitive types were longer than the salt-tolerant varieties (lines) Inhibition of morphological build-up, reduced material accumulation.