文献类型： 外文期刊

作者： Hu, Si-Yi ¹ ; Gao, Hui ¹ ; Li, Jian ² ; Wang, Yan-Hong ³ ; Gao, An-Guo ¹ ; Wen, Ji-Hui ¹ ; Balah, Mohamed Abdelaziz ⁶ ; Wu, Ai-Ping ¹ ;

作者机构： 1.Hunan Agr Univ, Coll Resources & Environm, Ecol Dept, Hunan Prov Key Lab Rural Ecosyst Hlth Dongting Lak, Changsha, Peoples R China

2.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha, Peoples R China

3.Zhejiang Agr & Forestry Univ, Sch Forestry & Biotechnol, Hangzhou, Peoples R China

4.Hunan Acad Agr Sci, Inst Plant Protect, Changsha, Peoples R China

5.Huaihua Univ, Huaihua, Hunan, Peoples R China

6.Desert Res Ctr, Plant Protect Dept, Ecol & Dry Lands Agr Div, Cairo, Egypt

期刊名称：PLOS ONE （ 影响因子：3.7； 五年影响因子：3.8 ）

ISSN： 1932-6203

年卷期： 2023 年 18 卷 1 期

页码：

收录情况： SCI

摘要： Allelopathy has been considered a good explanation for the successful invasion of some invasive plants. However, the real latitudinal and longitudinal allelopathic effects on native species have rarely been documented since many exotics have spread widely. We conducted a Petri dish experiment to determine the latitudinal and longitudinal allelopathic patterns of an invasive alligator weed (Alternanthera philoxeroides) on a common crop (Lactuca sativa) in China, and find what determines the allelopathic intensity. The results showed that the allelopathic effects of A. philoxeroides increased with the latitude while decreased with the longitude. This indicated that A. philoxeroides used its allelopathy to gain competitive advantages more in its recent invaded communities than that in its early invaded ones as A. philoxeroides is expanding from southeast China to northwest China. Furthermore, we found that the allelopathic intensity of A. philoxeroide was negatively correlated to the leaf contents of soluble carbohydrate (SC), carbon (C) and nitrogen (N), but that was positively correlated to the leaf contents of soluble protein (SP), free amino acids (FAA), plant polyphenol (PP), phosphorus (P) and potassium (K). These results suggested that the allelopathic intensity of A. philoxeroide was more determined by the limited P and K nutrients as well as the intermediate allelochemicals (SP, FAA, PP) rather than the unlimited C, N and SC. Thus, we can speculate that the negative or positive effects of plant aqueous extracts are a function of not only the extract concentrations but also the trade-offs between inhibition and promotion of all components in the extracts. Then we could reduce the allelopathic effects of A. philoxeroide by controlling the component contents in the plant tissues, by fertilization or other managements, especially in the plant recent invaded communities.