中国长江沿线三省不同入侵程度小飞蓬的化感作用
The allelopathy of horseweed with different invasion degrees in three provinces along the Yangtze River in China.
作者信息
Cheng Huiyuan, Wu Bingde, Yu Youli, Wang Shu, Wei Mei, Wang Congyan, Du Daolin
机构信息
Institute of Environment and Ecology & School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China.
School of Chemistry and Chemical Engineering, Zhaotong University, Zhaotong, 657000 China.
出版信息
Physiol Mol Biol Plants. 2021 Mar;27(3):483-495. doi: 10.1007/s12298-021-00962-y. Epub 2021 Mar 4.
UNLABELLED
The effect of allelopathy from invasive alien plants (IAPs) on native species is one of the main factors for their adaptation and diffusion. IAPs can have different degrees of invasion under natural succession and are distributed in numerous regions. Seed germination and seedling growth (SGe-SGr) play a crucial role in population recruitment. Thus, it is critical to illustrate the differences in the allelopathy caused by an IAP with different degrees of invasion in numerous regions on SGe-SGr of native species to describe the primary force behind their adaptation and diffusion. This study assessed the allelopathy of the notorious IAP horseweed ( (L.) Cronq.) on SGe-SGr of the native lettuce species ( L.) under different degrees of invasion (light degree of invasion and heavy degree of invasion) in three provinces (Jiangsu, Anhui, and Hubei) along the Yangtze River in China. The allelopathy of horseweed leaf extract on lettuce SGe-SGr remarkably increased with the increased degree of invasion, which may be due to the buildup of allelochemicals generated by horseweed with a heavy degree of invasion compared with a light degree of invasion. A high concentration of horseweed leaf extract resulted in noticeably stronger allelopathy on lettuce SGe-SGr compared to the extract with a low concentration. There are noticeable differences in the allelopathy of the extract of horseweed leaves from different provinces on lettuce SGe-SGr with the following order i.e. Jiangsu > Hubei > Anhui. This may be due to the high latitudes for the three sampling sites in Jiangsu compared with the latitudes for the collection sites in Hubei and Anhui. There are certain differences in the environments among the three provinces. Thus, the allelopathy of horseweed on SGe-SGr of lettuce may have a greater negative impact in Jiangsu compared to the other two provinces.
SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at 10.1007/s12298-021-00962-y.
未标注
外来入侵植物的化感作用对本地物种的影响是其适应和扩散的主要因素之一。外来入侵植物在自然演替过程中会有不同程度的入侵，且分布在众多地区。种子萌发和幼苗生长在种群补充中起着关键作用。因此，阐明不同程度入侵的外来入侵植物在众多地区对本地物种种子萌发和幼苗生长造成的化感作用差异，对于描述其适应和扩散背后的主要驱动力至关重要。本研究评估了臭名昭著的外来入侵植物小飞蓬（(L.) Cronq.）在中国长江沿线三个省份（江苏、安徽和湖北）不同入侵程度（轻度入侵和重度入侵）下对本地莴苣物种（L.）种子萌发和幼苗生长的化感作用。小飞蓬叶提取物对莴苣种子萌发和幼苗生长的化感作用随入侵程度的增加而显著增强，这可能是由于重度入侵的小飞蓬与轻度入侵相比产生的化感物质积累所致。与低浓度提取物相比，高浓度的小飞蓬叶提取物对莴苣种子萌发和幼苗生长的化感作用明显更强。不同省份的小飞蓬叶提取物对莴苣种子萌发和幼苗生长的化感作用存在显著差异，顺序为江苏＞湖北＞安徽。这可能是因为江苏的三个采样点纬度高于湖北和安徽的采集点纬度。三省之间的环境存在一定差异。因此，与其他两省相比，小飞蓬对江苏莴苣种子萌发和幼苗生长的化感作用可能具有更大的负面影响。
补充信息
在线版本包含可在10.1007/s12298-021-00962-y获取的补充材料。
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