Photosynthate-13C allocation in the plant-soil system after 13C–pulse labeling of Phragmites australis in different salt marshes

Geoderma ◽  
2019 ◽  
Vol 347 ◽  
pp. 252-261 ◽  
Author(s):  
Chen Wang ◽  
Rong Xiao ◽  
Yuan Cui ◽  
Ziwen Ma ◽  
Yutong Guo ◽  
...  
Keyword(s):  
Phragmites Australis ◽  
Salt Marshes ◽  
Soil System ◽  
Plant Soil ◽  
13C Pulse Labeling

scholarly journals Phragmites australis+Typha latifoliaCommunity Enhanced the Enrichment of Nitrogen and Phosphorus in the Soil of Qin Lake Wetland

Scientifica ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Zhiwei Ge ◽  
Ran An ◽  
Shuiyuan Fang ◽  
Pengpeng Lin ◽  
Chuan Li ◽  
...  
Keyword(s):  
Phragmites Australis ◽  
Soil Layer ◽  
Typha Latifolia ◽  
Wetland Soils ◽  
Wetland Soil ◽  
Vegetation Types ◽  
Nitrogen And Phosphorus ◽  
Soil System ◽  
Soil P ◽  
Plant Soil

Aquatic plants play an essential role and are effective in mitigating lake eutrophication by forming complex plant-soil system and retaining total nitrogen (TN) and phosphorus (TP) in soils to ultimately reduce their quantities in aquatic systems. Two main vegetation types (Phragmites australiscommunity andP. australis+Typha latifoliacommunity) of Qin Lake wetland were sampled in this study for the analysis of TN and TP contents and reserves in the wetland soils. The results showed that (1) the consumption effect of Qin Lake wetland on soluble N was much more significant than on soluble P. (2) The efficiency of TN enrichment in wetland soil was enhanced by vegetation covering ofP. australisandT. latifolia. (3) Wetland soil P was consumed byP. australiscommunity and this pattern was relieved with the introduction ofT. latifolia. (4) According to the grey relativity analysis, the most intensive interaction between plants and soil occurred in summer. In addition, the exchange of N in soil-vegetation system primarily occurred in the 0–15 cm soil layer. Our results indicated that vegetation covering was essential to the enrichment of TN and TP, referring to the biology-related fixation in the wetland soil.

Modelling the Balance of Metals in the Amended Soil for the Case of ‘Atmosphere–Plant–Soil’ System

2016 ◽  
Vol 21 (5) ◽  
pp. 577-590 ◽  
Author(s):  
Edita Baltrėnaitė ◽  
Arvydas Lietuvninkas ◽  
Pranas Baltrėnas
Keyword(s):  
Soil System ◽  
Plant Soil ◽  
Amended Soil

scholarly journals The response of soil and phyllosphere microbial communities to repeated application of the fungicide iprodione: accelerated biodegradation or toxicity?

2020 ◽  
Vol 96 (6) ◽  
Author(s):  
A Katsoula ◽  
S Vasileiadis ◽  
M Sapountzi ◽  
Dimitrios G Karpouzas
Keyword(s):  
Microbial Communities ◽  
Agricultural Production ◽  
Soil Microorganisms ◽  
Amplicon Sequencing ◽  
Fungal Communities ◽  
Similar Response ◽  
Repeated Application ◽  
Plant Leaves ◽  
Soil System ◽  
Plant Soil

ABSTRACT Pesticides interact with microorganisms in various ways with the outcome being negative or positive for the soil microbiota. Pesticides' effects on soil microorganisms have been studied extensively in soil but not in other pesticides-exposed microbial habitats like the phyllosphere. We tested the hypothesis that soil and phyllosphere support distinct microbial communities, but exhibit a similar response (accelerated biodegradation or toxicity) to repeated exposure to the fungicide iprodione. Pepper plants received four repeated foliage or soil applications of iprodione, which accelerated its degradation in soil (DT50_1st = 1.23 and DT50_4th = 0.48 days) and on plant leaves (DT50_1st > 365 and DT50_4th = 5.95 days). The composition of the epiphytic and soil bacterial and fungal communities, determined by amplicon sequencing, was significantly altered by iprodione. The archaeal epiphytic and soil communities responded differently; the former showed no response to iprodione. Three iprodione-degrading Paenarthrobacter strains were isolated from soil and phyllosphere. They hydrolyzed iprodione to 3,5-dichloraniline via the formation of 3,5-dichlorophenyl-carboxiamide and 3,5-dichlorophenylurea-acetate, a pathway shared by other soil-derived arthrobacters implying a phylogenetic specialization in iprodione biotransformation. Our results suggest that iprodione-repeated application could affect soil and epiphytic microbial communities with implications for the homeostasis of the plant–soil system and agricultural production.

scholarly journals Interplay of Darwinian and frequency-dependent selection in the host-associated microbial population

2005 ◽  
Vol 3 (3) ◽  
pp. 3-11
Author(s):  
Nikolay I Vorobyov ◽  
Nikolay A Provorov
Keyword(s):  
Mathematical Simulation ◽  
Microbial Population ◽  
Genetically Modified ◽  
Ecological Niches ◽  
Soil System ◽  
Selection Pressures ◽  
Frequency Dependent ◽  
Frequency Dependent Selection ◽  
Plant Soil ◽  
Balanced Polymorphism

The method for mathematical simulation is suggested to analyze the balanced polymorphism in rhizobia population generated due to the interplay of Darwinian and frequency-dependent selection. Analysis of the model suggested that this polymorphism is determined not only by the selection pressures but also by the capacities of ecological niches occupied by bacteria in the «plant-soil» system. The model may be used for analyzing the selective processes in various symbiotic systems and for predicting the consequences of releasing of genetically modified plant symbionts into environment.

Sign in / Sign up

Export Citation Format

Share Document