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PAW及其与LTP的联合作用对小麦种子萌发及幼苗生长的影响 被引量:1
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作者 齐先科 李淼 +1 位作者 李彩虹 渠琛玲 《河南农业科学》 北大核心 2024年第4期20-29,共10页
以济麦22、百农307为材料,研究等离子体活化水(PAW,制备时间分别为5.0、7.5、10.0 min,分别命名为PAW-5、PAW-7.5、PAW-10)及其与低温等离子体(LTP)联合处理(LTP+W-5、LTP+W-7.5、LTP+W-10)对小麦种子萌发及幼苗生长的影响,以期为PAW、... 以济麦22、百农307为材料,研究等离子体活化水(PAW,制备时间分别为5.0、7.5、10.0 min,分别命名为PAW-5、PAW-7.5、PAW-10)及其与低温等离子体(LTP)联合处理(LTP+W-5、LTP+W-7.5、LTP+W-10)对小麦种子萌发及幼苗生长的影响,以期为PAW、LTP在小麦种子活力提高方面的应用提供理论依据。结果表明,2个小麦品种种子均于LTP处理9 s时的发芽率及发芽指数达到最佳,因此选用LTP处理时间9 s进行PAW与LTP联合作用效果研究。PAW、PAW与LTP联合处理均能提高小麦种子的发芽率、株高、幼苗鲜质量和干质量,并显著提高种子的活力指数,总体以LTP+W-7.5处理效果最好;未经LTP处理的种子与蒸馏水之间的接触角最大,表明其润湿性能最弱,相较之下,未经LTP处理的种子与PAW之间的接触角有所下降,而经LTP处理后的种子与蒸馏水或PAW之间的接触角极显著下降;与蒸馏水处理相比,PAW及其与LTP联合处理的小麦幼苗中的活性氧氮(RONS)含量总体上显著增加,而仅LTP处理的小麦幼苗中RONS含量无显著变化。综上,PAW及其与LTP联合处理均有效地促进了小麦种子萌发及幼苗生长,其中LTP+W-7.5处理的促进效果最佳。 展开更多
关键词 小麦 种子萌发 幼苗生长 低温等离子体 等离子体活化水 活力指数 润湿性能 活性氧氮
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Bioleaching of chalcocite by mixed microorganisms subjected to mutation 被引量:2
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作者 康健 邱冠周 +3 位作者 高健 王海华 吴学玲 丁建南 《Journal of Central South University》 SCIE EI CAS 2009年第2期218-222,共5页
Mixed microorganisms with elevated activity of chalcocite-leaching were screened by mutation methods. The original microorganisms collected from acid mine drainage of different sites were mixed and then treated with m... Mixed microorganisms with elevated activity of chalcocite-leaching were screened by mutation methods. The original microorganisms collected from acid mine drainage of different sites were mixed and then treated with mutagens NO2^- , diethyl sulfate (DES), UV and their combinations, respectively. Five groups of mixed microorganisms with much stronger ore-leaching ability were obtained by screening on the leaching media. Among them, group E of mixed microorganisms (treated with 1% DES for 60 min) with the best perfonnance on chalcocite-leaching, increases the content of Cu^2+ by 101.4% in 20 d of leaching compared with the control culture. In addition, group E is more tolerant to Cu^2+ in media than the control without mutation treatment. Analysis for the diversity of microbial clones indicates that half of operational taxonomic units (OTUs) in group E are Acidithiobacillus ferrooxidans. These observations suggest that group E might have potentials for industrial application. 展开更多
关键词 CHALCOCITE mixed microorganisms BIOLEACHING MUTATION
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