摘要
为提高盐渍化农田作物的耐盐性,从生长于高盐土壤的玉米根际中分离促生潜力的菌株,在NaCl胁迫下,测定其对玉米发芽率、发芽势、促生长和电导率的影响。结果表明,枯草芽孢杆菌NY-06、巨大芽孢杆菌YJ-1和解淀粉芽孢杆菌YJ-3有很好益生效果。在1.5%NaCl和2.0%NaCl胁迫下,3个菌株发酵液处理后的玉米株高分别增高16.3%、9.5%、16.7%和18.9%、8.3%、19.9%,地上部鲜重分别增加28.8%、21.5%、34.0%和29.3%、22.8%、36.3%,根系鲜重分别增加32.7%、15.5%、18.3%和51.9%、58.6%、56.8%,玉米叶片相对电导率分别降低11.1%、9.2%、8.0%和6.4%、9.5%、14.2%。
To improve the salt tolerance of salinized farmland crops,the strains with promoting growth potential were isolated from the rhizosphere of maize grown in high salt soil.Under the stress of NaCl,we determined their ef-fects on maize germination rate,germination potential,growth rate and blade electrical conductivity.The results showed that Bacillus subtilis NY-06,Bacillus megaterium YJ-1 and Bacillus amyloliquefaciens YJ-3 had beneficial effects on maize growth.When maize plants were drenched with the strains fermentation broth,,the three strains in-creased 16.3%,9.5%,16.7%of the plant height of maize,28.8%,21.5%,34.0%of the fresh weight of above-ground parts,32.7%,15.5%,18.2%of root fresh weight,and decreased 11.1%,9.2%,8.0%of blade relative conduc-tivity,respectively,under the stress of 1.5%NaCl.And under 2.0%NaCl stress,the three strains fermentation broth had the same influencing trends on maize plant as that under 1.5%NaCl stress,which increased plant height by 18.9%,8.3%,19.9%,increased above-ground fresh weight by 29.2%,22.8%,36.3%,increased root fresh weight by 51.9%,58.6%and 56.8%,and decreased the relative conductivity of maize leaves by 6.4%,9.5%,14.2%,respec-tively.
作者
袁海
何鹏飞
吴毅歆
李兴玉
何鹏搏
康志钰
何月秋
YUAN Hai;HE Peng-fei;WU Yi-xin;LI Xing-yu;HE Peng-bo;KANG Zhi-yu;HE Yue-qiu(Faculty College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming 650201;College of Plant Protection,Yunnan Agricultural University,Kunming 650201;National and Local Joint Engineering Research Center for Screening and Application of Microbial Strains,Kunming 650217;College of Information Engineering,Yunnan Agricultural University,Kunming 650201,China)
出处
《玉米科学》
CAS
CSCD
北大核心
2019年第1期69-74,共6页
Journal of Maize Sciences
基金
云南省玉米产业体系项目(2017KJTX002)
关键词
玉米
益生菌
盐胁迫
根际
电导率
Maize
Beneficial bacterium
Salt stress
Rhizosphere
Electrical conductivity
