气候变化领域集成服务门户(CCPortal): The competitive strategies of poisonous weeds Elsholtzia densa Benth. on the Qinghai Tibet Plateau: Allelopathy and improving soil environment

CCPortal

DOI	10.3389/fpls.2023.1124139
	The competitive strategies of poisonous weeds Elsholtzia densa Benth. on the Qinghai Tibet Plateau: Allelopathy and improving soil environment
	Zhou, Xijie; Xiao, Yunxing; Ma, Danwei; Xie, Yusi; Wang, Yu; Zhang, Hong; Wang, Yanan
发表日期	2023
ISSN	1664-462X
卷号	14
英文摘要	IntroductionThe competitive strategies of plants play a crucial role in their growth. Allelopathy is one of the weapons that plants use to improve their competitive advantage. MethodsIn order to explore the competitive strategy of a poisonous weed Elsholtzia densa Benth. (E. densa) on the Qinghai-Tibet Plateau (QTP), the effects of decomposing substances of E. densa on growth, root border cells (RBCs) characteristics of highland crop highland barley (Hordeum vulgare L.), and soil environment were determined. ResultsThe decomposing allelopathic effect of E. densa on the germination and seedling growth of highland barley mainly occurred in the early stage of decomposing. The allelopathic effects were mainly on seed germination and root growth of highland barley. After treatment with its decomposing solution, the RBC's mucilage layer of highland barley thickened, and the RBC's activity decreased or even apoptosis compared with the control. However, only the above-ground part of the treatment group showed a significant difference. The effects of E. densa decomposed substances on the soil environment were evaluated from soil physicochemical properties and bacterial community. The results showed that soil bacteria varied greatly in the early stage of decomposion under different concentrations of E. densa. In addition, E. densa decomposing substances increased the soil nutrient content, extracellular enzyme activities, and bacterial community diversity. In the process of decomposition, the bacterial community structure changed constantly, but Actinobacteriota was always the dominant phylum. DiscussionThese results indicated that E. densa might adopt the following two strategies to help it gain an advantage in the competition: 1. Release allelochemicals that interfere with the defense function of surrounding plants and directly inhibit the growth and development of surrounding plants. 2. By changing the physical and chemical properties of soil and extracellular enzyme activity, residual plant decomposition can stimulate soil microbial activity, improve soil nutrition status, and create a more suitable soil environment for growth.
关键词	Elsholtzia densa Benth competitive strategies allelopathy root border cells soil environment
英文关键词	MICROBIAL COMMUNITIES; BACTERIAL COMMUNITY; ESSENTIAL OIL; ROOT-GROWTH; PLANTS; RESTORATION; RHIZOSPHERE; GRASSLAND; DIVERSITY; DOMINANCE
WOS研究方向	Plant Sciences
WOS记录号	WOS:000950674100001
来源期刊	FRONTIERS IN PLANT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283271
作者单位	Sichuan Normal University
推荐引用方式 GB/T 7714	Zhou, Xijie,Xiao, Yunxing,Ma, Danwei,et al. The competitive strategies of poisonous weeds Elsholtzia densa Benth. on the Qinghai Tibet Plateau: Allelopathy and improving soil environment[J],2023,14.
APA	Zhou, Xijie.,Xiao, Yunxing.,Ma, Danwei.,Xie, Yusi.,Wang, Yu.,...&Wang, Yanan.(2023).The competitive strategies of poisonous weeds Elsholtzia densa Benth. on the Qinghai Tibet Plateau: Allelopathy and improving soil environment.FRONTIERS IN PLANT SCIENCE,14.
MLA	Zhou, Xijie,et al."The competitive strategies of poisonous weeds Elsholtzia densa Benth. on the Qinghai Tibet Plateau: Allelopathy and improving soil environment".FRONTIERS IN PLANT SCIENCE 14(2023).