| 王治江,刘自刚,孙万仓,方彦,武军艳,刘海卿,赵艳宁,蒲媛媛,袁金海,钱武,陈奇,方园,徐梦雪.NaCl和Na2SO4胁迫对白菜型冬油菜种子萌发的影响及其耐盐性分析[J].干旱地区农业研究,2016,34(6):243~252 |
| NaCl和Na2SO4胁迫对白菜型冬油菜种子萌发的影响及其耐盐性分析 |
| Effects of NaCl and Na2SO4 stress on germination of winter rapeseed (Brassica rapa L.) and analysis of salt resistance |
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| DOI：10.7606/j.issn.1000-7601.2016.06.37 |
| 中文关键词: NaCl Na2SO4 盐胁迫 白菜型冬油菜 种子萌发 耐盐性 |
| 英文关键词:NaCl Na2SO4 salt stress winter rapeseed (Brassica rapa L.) germination salt Tolerance |
| 基金项目:国家现代农业产业技术体系建设专项资金（CARS-13）；国家自然科学基金(31460356)；国家863计划(2011AA10A104)；国家973计划(2015CB150206)；国家农业科技成果转化项目(2014G10000317) |
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| 中文摘要: |
| 以6个耐盐性不同的白菜型冬油菜种子为材料，将NaCl和Na2SO4按摩尔比1∶1混合，设浓度为0（CK）、45、90、135、180、240 mmol·L-16个处理，测定其对种子萌发和生长参数的影响，研究不同冬油菜种子萌发时的耐盐能力，以期为耐盐冬油菜的筛选提供依据。结果表明：(1) 45 mmol·L-1和90 mmol·L-1盐浓度对种子萌发的影响不明显；135 mmol·L-1和180 mmol·L-1盐浓度明显抑制了种子萌发，表现为种子发芽势、发芽率、发芽指数、活力指数、胚根长、胚芽长、鲜重和干重均随盐浓度的增大而明显降低。因此，135～180 mmol·L-1盐浓度可认为是耐盐性鉴定的适宜范围。(2) 不同指标对盐胁迫的敏感程度差异较大，发芽指数、活力指数、胚芽长和鲜重与盐浓度均为极显著负相关，对盐胁迫最为敏感。(3) 3个耐盐冬油菜ky-1、ky-10-191和ky-NDJ的种子发芽指数、活力指数、胚芽长和鲜重的耐盐临界值显著高于原有品系平油1号、10-191和ky-NDJ。ky-1、ky-10-191、ky-NDJ的耐盐临界值分别为133.895、123.264、107.399 mmol·L-1，而平油1号、10-191、NDJ的耐盐临界值分别为117.394、103.947、93.834 mmol·L-1。用隶属函数法综合评价，耐盐性强弱顺序依次为ky-1>ky-10-191>平油1号>ky-NDJ>10-191>NDJ。可见，ky-1、ky-10-191和ky-NDJ的耐盐性较平油1号、10-191和NDJ均有所提高。 |
| 英文摘要: |
| Winter rapeseeds’(Brassica rapa L.) seeds from six cultivars was treated by mixed solution of NaCl and Na2SO4 (mole ratio of 1∶1) to investigate the salt tolerance for screening of salt tolerance winter rapeseed. The concentration of mixed solution included 0 (CK), 45, 90, 135, 180, 240 mmol·L-1. Seed germination and growth parameters were determined. The results showed that salt concentration of 45 mmol·L-1 and 90 mmol·L-1 had little effect on seed germination but 135 mmol·L-1 and 180 mmol·L-1 significantly inhibited the germination of seeds, germination potential, germination rate, germination index, vigor index, length of radicle and plumule, fresh weight and dry weight, indicating that salt concentration of 135～180 mmol·L-1 could be considered as the appropriate concentration of salt resistance identification. Moreover, the salt stress sensitivity of these indicators differenced a lot. Germination index, vigor index, plumule length and fresh weight and salt concentration were negatively correlated, suggesting that they were the most sensitive indicators. The salt tolerance critical value of ky-1, ky-10-191 and ky-NDJ were 133.895, 123.264, 107.399 mmol·L-1, while that of Pingyou 1, 10-191 and NDJ were 117.394, 103.947, 93.834 mmol·L-1, respectively. The former was significantly higher than the latter. Comprehensive evaluation indicated that the salt-tolerance rank of six winter rapeseeds was ky-1>ky-10-191>Pingyou 1>ky-NDJ>10-191>NDJ. |
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