巴青松,宋瑜龙,张兰兰,李桂萍,刘远,陈楚,傅兆麟.根施水杨酸对铅胁迫下小麦根系生长发育的影响[J].干旱地区农业研究,2019,37(1):208~213
根施水杨酸对铅胁迫下小麦根系生长发育的影响
Effects of root-applying salicylic acid on the growth and development of wheat roots under lead stress
  
DOI:10.7606/j.issn.1000-7601.2019.01.29
中文关键词:  铅胁迫  小麦根系  根施水杨酸  生理特性
英文关键词:lead stress  wheat root system  root-applying salicylic acid  physiological characteristics
基金项目:安徽省自然科学基金(1708085QC62);国家自然科学基金(D010506);安徽省高等学校省级自然科学研究项目(KJ2016A624);淮北师范大学博士科研启动基金(15600971); 资源植物生物学安徽省重点实验室开放基金(ZYZWSW2014012)
作者单位
巴青松 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
宋瑜龙 Northwest A&F University, State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling, Shaanxi 712100, China 
张兰兰 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
李桂萍 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
刘远 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
陈楚 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
傅兆麟 College of Life Science, Huaibei Normal University, Anhui Key Laboratory of Plant Resourcesand BiologyHuaibei, Anhui 235000, China 
摘要点击次数: 139
全文下载次数: 116
中文摘要:
      以小麦品种“轮选988”为材料,采用溶液培养法,研究了80 mg·L-1水杨酸(SA)对铅(50 mg·L-1 Pb2+)胁迫下小麦幼苗生长及生理特性的影响。结果表明:根施SA后,铅胁迫下的小麦幼苗株高、根长、株鲜重、根鲜重、株干重和根干重较对照(铅胁迫下未根施SA)分别上升了17.67%、24.85%、23.46%、18.69%、18.95%和25.41%,根系超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活性分别上升了215.73%、98.92%、137.45%和111.47%,根中超氧阴离子(O[KG-1][JX*3]·[JX-*3]2)和过氧化氢(H2O2)含量分别降低了23.82%和28.99%;同时,根施SA,铅胁迫下小麦根系中可溶性糖含量上升了13.59%,而Pro含量下降了40.11%,根系中丙二醛(MDA)含量降低了16.78%,小麦根系活力增加了694.52%。因此,根施SA在一定程度上提高了小麦根系的抗氧化能力,缓解了铅离子对小麦根系的毒害。
英文摘要:
      In order to explore the role of salicylic acid (SA) in alleviating lead (Pb) toxicity on wheat (Triticum aestivum L.), wheat seedlings exposed to 50 mg·L-1 Pb as Pb(NO3)2 were treated with 80 mg·L-1 SA. The physiological and biochemical indexes of wheat seedlings were measured by solution culture method. The results showed that Pb exposure depressed plant growth. However, after root-applying SA, the plant height, root length, fresh and dry weights of plant and root were increased by 17.67%, 24.85%, 23.46%,18.69%,18.95%, and 25.41%, respectively. In addition, SOD, POD, CAT, and APX increased by 215.73%, 98.92%, 137.45%, and 111.47%, respectively. The contents of O[KG-1][JX*3]·[JX-*3]2 and H2O2 in the roots decreased by 23.82% and 28.99%, respectively. Whereas the contents of soluble sugar increased by 13.59% while the content of proline decreased by 40.11%. The content of MDA in the roots decreased by 16.78% and root activity increased by 694.52% after root-application of SA under Pb stress. Therefore, root-applying SA significantly improved the antioxidation capability of wheat roots, which could, in turn, enhance the resistance of wheat roots to Pb stress and alleviate Pb toxic effects.
查看全文  查看/发表评论  下载PDF阅读器