摘要
植物促生菌可以促进植物生长,从而对农业生产起到促进作用。藜麦是一种全蛋白谷物,具有很高的食用与药用价值,发展前景广阔。通过藜麦接种促生菌解淀粉芽孢杆菌GB03后,测定藜麦在正常及盐胁迫下的生物量变化,探究促生菌对藜麦生长的影响。结果表明,解淀粉芽孢杆菌GB03处理后,藜麦根、茎长及干、鲜质量显著高于对照组(P<0.05),其中GB03处理的藜麦根长与LB对照相比提高31.19%,茎长与LB对照相比提高6.26%;GB03处理的藜麦干质量与LB对照相比提高300.00%,鲜质量与LB对照相比提高50.96%。在0、150、300 mmol/L盐胁迫下,解淀粉芽孢杆菌GB03处理的藜麦幼苗茎长较未经GB03处理的分别显著提高21.54%、49.36%、39.12%(P<0.05);GB03处理的藜麦根鲜质量显著高于未经GB03处理的(P<0.05),分别提高182.00%、200.00%、533.00%;GB03处理的藜麦地上部鲜质量较未经GB03处理的分别显著提高45.46%、26.58%、39.58%(P<0.05)。在300 mmol/L盐胁迫下,解淀粉芽孢杆菌GB03处理的藜麦幼苗根长较未经GB03处理的显著提高172%(P<0.05),地上部干质量较未经GB03处理的显著提高144%(P<0.05),根干质量较未经GB03处理的显著提高266%(P<0.05)。
Plant growth-promoting bacteria(PGPR)can promote plant growth,hence stimulating agricultural development.Chenopodium quinoa Willd is a whole-protein cereal with high edible and medicinal values and broad development prospect.This research assessed the effects of the PGPR strain Bacillus amyloliquefaciens GB03 on the growth of C.quinoa seedlings under both normal conditions and salt(NaCl)stress.The results showed that the treatment with B.amyloliquefaciens GB03 significantly(P<0.05)increased the root length of C.quinoa seedlings by 31.19%,the stem length by 6.26%,the dry weight by 300%,and the fresh weight by 50.96%in relation to the control treatment with LB.Under 0,150,and 300 mmol/L salinity,the treatment with B.amyloliquefaciens GB03 resulted in significant(P<0.05)increases in the stem length by 21.54%,49.36%,and 39.12%,respectively;in the fresh weight of roots by 182%,200%,and 533%,respectively;and in the fresh weight of above-ground plant parts by 45.46%,26.58%,and 39.58%,respectively,in relation to the control.Moreover,under the stress of 300 mmol/L salinity,the treatment with B.amyloliquefaciens GB03 caused significant(P<0.05)increases in the root length by 172%,in the dry weight of above-ground plant parts by 144%,and in the dry weight of roots by 266%as compared with the control.
作者
徐瑛
郭晓农
蔡德育
XU Ying;GUO Xiao-nong;CAI De-yu(College of Life Science and Engineering,Northwest University for Nationalities,Lanzhou 730030,China;College of Grassland Agriculture Science and Technology/State Key Laboratory of Grassland Agricultural Ecological System,Lanzhou University,Lanzhou 730020,China;Biomedical Research Center,Northwest University for Nationalities,Lanzhou 730030,China)
出处
《大麦与谷类科学》
2019年第5期10-14,共5页
Barley and Cereal Sciences
基金
国家自然科学基金(31760242)
西北民族大学2019年度中央高校基本科研业务费创新团队培育项目(31920190021)
西北民族大学2018年本科生科研创新项目（Y18088）
西北民族大学“双一流”引导专项生物工程特色学科(1001070204)
西北民族大学本科教学建设项目(2017XJJG-07、Y18091)
关键词
解淀粉芽孢杆菌
藜麦
促生作用
促生菌
盐胁迫
Bacillus amyloliquefaciens
Chenopodium quinoa Willd
Growth promotion
Plant growth promoting bacteria
Salt stress
