Allelopathic effects of actinobacterial isolates on seed germination and early seedling growth of velvetleaf (Abutilon theophrasti Medik.)

L. Santric, L. Radivojević, J. Gajić-Umiljendić, M. Sarić-Krsmanović
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引用次数: 1

Abstract

This study aimed to examine in vitro allelopathic effects of actinobacterial isolates on seed germination and early seedling growth of velvetleaf (Abutilon theophrasti). Thirtyfive actinobacterial isolates were obtained from soil and compost in different phases of composting. Also, an experiment variant involving the herbicide mesotrione was set in the recommended amount of application, as a reference standard. The experimental results indicate statistically significant differences (p<0.05) between controls and all treatments with actinobacterial isolates regarding seed germination, and radical and shoot length. The highest inhibition (100%) was observed in seed germination and radical length in treatments with the isolates A10 and NOV2, compared to uninoculated starch casein broth (SCB) as control. Shoot length was shown to be the most sensitive parameter, where 100% inhibition was observed in the following treatments with actinobacteria: A010, A017, NOV2, NOV3, NOV4 and NOV5. Actinobacterial isolates showed a higher inhibitory effect on seed germination than treatment with the reference herbicide mesotrione.
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放线菌分离株对棉叶种子萌发和幼苗早期生长的化感作用
本研究旨在研究放线菌分离物对棉叶种子萌发和幼苗早期生长的体外化感作用。从堆肥不同阶段的土壤和堆肥中分离出35株放线菌。同时,在推荐施用量中设置了涉及除草剂美索三酮的实验变异体,作为参考标准。结果表明,放线菌分离菌处理与对照在种子发芽率、根数和茎长方面差异均有统计学意义(p<0.05)。与未接种淀粉酪蛋白肉液(SCB)对照相比,A10和NOV2处理对种子萌发和根茎长度的抑制作用最高(100%)。芽长是最敏感的参数,放线菌A010、A017、NOV2、NOV3、NOV4和NOV5对芽长的抑制率均为100%。放线菌对种子萌发的抑制效果优于对照除草剂美索三酮。
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