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Phenolic Acids in plant-soil-microbe system: A Review

Pedosphere 2002年第1期12卷 1-14页

作者： LI SHOUTIAN, ZHOU JIANMIN, WANG HUOYAN and CHEN XIAOQIN Institute of soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing S10008 (China) Institute of soil Science the Chinese Academy of Sciences P. O. Box 821 Nanjing 210008

Phenolic acids are very common compounds in pedosphere. Theobjective of this review was to summarize the current knowledge ofthe behaviors of phenolic acids in plant-soil microbe system. Whenphenolic acids originated form leaching, decomposition and exudationof living and dead plant tissues enter soils, they can reactphysiochemically with soil particle surfaces and/or incorporate intohumic matter. Phenolic acids desorbed from soil particle surfaces andremained in solution phase can be utilized by microbe as carbonsources and absorbed by plants.

关键词： allelopathic activity phenlic acids plant-soil-microbe system

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Effects of Elevated CO_2 and Drought on plant Physiology, soil Carbon and soil Enzyme Activities

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Pedosphere 2017年第5期27卷 846-855页

作者： WANG Yuhui YAN Denghua WANG Junfeng DING Yi SONG Xinshan College of Environmental Science and Engineering Donghua University China Institute of Water Resources and Hydropower Research

Global climate models have indicated high probability of drought occurrences in the coming future decades due to the impacts of climate change caused by a mass release of CO2. Thus, climate change regarding elevated ambient CO2 and drought may consequently affect the growth of crops. In this study, plant physiology, soil carbon, and soil enzyme activities were measured to investigate the impacts of elevated C02 and drought stress on a Stagn[c Anthrosol planted with soybean （Glycine ma,z）. Treatments of two CO2 levels, three soil moisture levels, and two soil cover types were established. The results indicated that elevated CO2 and drought stress significantly affected plant physiology. The inhibition of plant physiology by drought stress was mediated via prompted photosynthesis and water use efficiency under elevated CO2 conditions. Elevated CO2 resulted in a longer retention time of dissolved organic carbon （DOC） in soil, probably by improving the soil water effectiveness for organic decomposition and mineralization. Drought stress significantly decreased C：N ratio and microbial biomass carbon （MBC）, but the interactive effects of drought stress and CO2 on them were not significant. Elevated CO2 induced an increase in invertase and catalase activities through stimulated plant root exudation. These results suggested that drought stress had significant negative impacts on plant physiology, soil carbon, and soil enzyme activities, whereas elevated CO2 and plant physiological feedbacks indirectly ameliorated these impacts.

关键词： catalase drought stress invertase plant growth plant-soil-microbe system soil C:N ratio water use efficiency

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Effects of nitrogen addition on plant-soil-microbe stoichio-metry characteristics of different functional group species in Bothriochloa ischemum community

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soil Ecology Letters 2022年第4期4卷 362-375页

作者： ZiWen Zhao YanLi Qin Yang Wu WenJing Chen Sha Xue GuoBin Liu State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China Institute of soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China Key Laboratory of National Forestry and Grassland Administration on Ecological Hydrology and Disaster Prevention in Arid Regions Xi'an University of TechnologyXi'an 710048China

Nitrogen(N)deposition,the source of N input into terrestrial ecosystems,is exhibiting an increasingly serious impact on the biogeochemical cycle and functional stability of *** are an important component of terrestrial ecosystems and play a key role in maintaining terrestrial ecosystem ***,it is critical to understand the effects of nitrogen addition on grassland *** conducted gradientN addition experiments(0,3,6,and 9 g N m^(-2)2 y^(-1))for threeyears ingrassland communities with similar site *** utilized four typical herbaceous plants,including the dominant species Bothriochloa ischemum(***)and companion species Stipa bungeana(***),Artemisia gmelinii(***),and Cleistogenes squarrosa(***),to explore how different plant-soil-microbe systems respond to N *** homeostasis analysis demonstrated that both plants and microbes were strictly ***,the companion species were found to be more susceptible to P dominant ***,aggravated overlap in stoichiometric niches between plant species were observed at the N6 and N9 *** analysis indicated that the vector angle was>45°regardlessof plant species and N levels,suggesting that there was a strong Plimitation in the rhizosphere microbial *** partitioning analysis revealed that the Composite roots exhibited a greater effect(explaining 34.7% of the variation)on the rhizosphere microbes than on the Gramineae,indicating that there may be more intense nutrient competition in its ***,the effects of N addition on species were different a cross functional groups,with a significant positive effect on the Gramineae(***,***,and ***)and a significant negative effecton the Compositae(***),which should be fully considered in the future ecological management and restoration.

关键词： N addition Ecological stoichiometry Stoichiometric homeostasis Nutrient limitation Stoichiometric niche plant-soil-microbe system

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