Research articles
ScienceAsia 49 (2023):ID 888-898 |doi:
10.2306/scienceasia1513-1874.2023.099
Differences in rhizosphere soil microbial function and
community structure in invasive weed Bidens pilosa and
native weeds
Shasha Luoa,b, Dachun Shena,b, Yinglin Lua,b, Jihu Lia,b, Donglei Suna,b, Yuxing Ana,b,*
ABSTRACT: As an invasive weed, Bidens pilosa seriously threatens native ecosystem functions in beach regions in
South China. This study aimed to explore the differences in soil nutrients and microorganisms between the invasive
weed B. pilosa and native weeds (Cynodon dactylon, Portulaca oleracea, and Eleusine indica), exploring variations in
soil functions after B. pilosa invasion. The results showed that soil nutrients varied by the weed species. The total and
unique bacterial and fungal amplicon sequence variant (ASV) numbers in B. pilosa were higher than those in the other
three weeds. The bacterial composition related to soil carbon metabolism differed between B. pilosa and the other three
native weeds. Analysis of bacterial metabolic pathways showed that their soil carbon metabolism ability was higher
than that of the other three native weeds. Some pathogenic fungi and Lophotrichus (dark septate endophytes) are
enriched in the rhizosphere of B. pilosa. Increasing the relative abundance of beneficial soil bacteria and decreasing the
relative abundance of pathogenic soil fungi may be beneficial for resisting the invasion of B. pilosa. In addition, the soil
total phosphorus, available phosphorus, and soil organic matter contents were identified as the most important edaphic
factors shaping microbial community structure and function in the context of B. pilosa invasion. This study revealed
differences in soil microorganisms between B. pilosa and native weeds, and these differences potentially affected the
native ecosystem function.
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a |
Guangdong Province Pesticide-fertilizer Technology Research Center, Institute of Nanfan &Seed Industry,
Guangdong Academy of Sciences, Guangzhou 510316 China |
b |
Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, Guangzhou 510316 China |
* Corresponding author, E-mail: anyuxing2021@126.com
Received 21 Nov 2022, Accepted 2 Sep 2023
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