盐胁迫对福建主栽水稻品种芽期生长的影响OACSTPCD
Effect of salt stress on germination growth of major rice varieties in Fujian Province
[目的]确定适合筛选芽期耐盐水稻的盐浓度,并筛选耐盐品种,为盐碱地种植优质高产水稻品种提供依据.[方法]分别以 50、100 和 150 mmol·L-1 NaCl溶液胁迫种子,测定福建省 12 个主栽水稻品种的形态和生理指标,并采用相关性分析、隶属函数法和聚类分析综合评价各品种的耐盐水平.[结果](1)随着盐浓度的升高,参试水稻品种的相对发芽势、相对根长、相对芽长和相对淀粉酶活性均不断下降,而相对电导率则不断提高,表明盐处理对芽期生长有抑制作用,且明显损害细胞膜透性.(2)10 项指标中,相对发芽势、相对根长、相对芽长、相对蛋白含量、相对淀粉酶活性、相对电导率和相对CAT活性的变异性均于 150 mmol·L-1盐浓度下达到最大,表明该盐浓度适合芽期的品种筛选.(3)获得的强耐盐品种有荃优 212、荃优 822 和两优H108,中度耐盐品种有昌两优 8 号、中浙优 8 号、甬优 1540、野香优 676、晶两优 1212 和野香优744,敏盐品种有谷优 676、甬优 15 号和甬优 2640.[结论]筛选芽期耐盐品种的适宜盐浓度为 150 mmol·L-1;荃优 212、荃优 822 和两优H108 的芽期耐盐性强.该结果可为后续强耐盐品种的耐盐机制研究和盐碱地推广种植提供参考.
[Purpose]The optimal salt concentration for salt-tolerant rice varieties during seed germination was determined and a screening process was conducted to identify suitable rice varieties for cultivation in saline-alkali land,aiming to establish a founda-tion for producing high rice quality and yield.[Method]The seeds were treated with NaCl solutions of concentrations 50,100,and 150 mmol·L-1.Morphological and physiological indices of 12 major rice varieties in Fujian Province were measured.Correlation a-nalysis,membership functions,and cluster analysis were employed to evaluate salt tolerance performance.[Result](1)With in-creasing NaCl concentration,all tested rice varieties exhibited a consistent decline in relative germination potential,relative root and shoot lengths,and relative amylase activity.Conversely,a steady increase was observed in relative electrical conductivity,sugges-ting that salt treatment inhibited germination growth and significantly impaired membrane integrity.(2)Among the morphological and physiological indices,the maximum variability was observed in relative germination potential,relative root and shoot length,rel-ative protein content,relative electrical conductivity,and relative amylase and CAT activities at a salt concentration of 150 mmol·L-1,indicating that this concentration was suitable for screening varieties during germination.(3)High salt tolerance varie-ties included Quanyou 212,Quanyou 822,and Liangyou H108.Medium salt tolerance varieties included Changliangyou 8,Zhongzheyou 8,Yongyou 1540,Yexiangyou 676,Jingliangyou 1212,and Yexiangyou 744.Sensitive salt varieties included Guyou 676,Yongyou 15,and Yongyou 2640.[Conclusion]A NaCl concentration of 150 mmol·L-1 was identified as optimal for salt tolerance treatment.Quanyou 212,Quanyou 822,and Liangyou H108 exhibited significant salt tolerance during germination.This study will lay the groundwork for future studies on the mechanisms of salt tolerance in rice varieties and promote the use of sa-line-alkali soils for rice cultivation.
阮妙鸿
福建省种植业技术推广总站,福建 福州 350003
农业科学
盐胁迫芽期生长主栽水稻品种福建省
salt stressseed germination growthmajor rice varietiesFujian Province
《亚热带农业研究》 2024 (001)
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福建省自然科学基金项目"不同化感潜力水稻对稗草分泌物DIMBOA的耐受性差异及其分子机制研究"(2020J01547).
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