scholarly journals Soil bacterial and fungal community dynamics in relation to Panax notoginseng death rate in a continuous cropping system

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Linlin Dong ◽  
Jiang Xu ◽  
Guangquan Feng ◽  
Xiwen Li ◽  
Shilin Chen
Keyword(s):  
Fungal Community ◽  
Death Rate ◽  
Community Dynamics ◽  
Cropping System ◽  
Panax Notoginseng ◽  
Continuous Cropping ◽  
Soil Bacterial ◽  
Continuous Cropping System

scholarly journals Long-Term Monoculture Negatively Regulates Fungal Community Composition and Abundance of Tea Orchards

Agronomy ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 466 ◽  
Author(s):  
Yasir Arafat ◽  
Muhammad Tayyab ◽  
Muhammad Umar Khan ◽  
Ting Chen ◽  
Hira Amjad ◽  
...  
Keyword(s):  
Soil Ph ◽  
Fungal Community ◽  
Cropping System ◽  
Alpha Diversity ◽  
Fungal Species ◽  
Fungal Communities ◽  
Continuous Cropping ◽  
Fungal Community Composition ◽  
Continuous Cropping System ◽  
Tea Plants

Continuous cropping frequently leads to soil acidification and major soil-borne diseases in tea plants, resulting in low tea yield. We have limited knowledge about the effects of continuous tea monoculture on soil properties and the fungal community. Here, we selected three replanted tea fields with 2, 15, and 30 years of monoculture history to assess the influence of continuous cropping on fungal communities and soil physiochemical attributes. The results showed that continuous tea monoculture significantly reduced soil pH and tea yield. Alpha diversity analysis showed that species richness declined significantly as the tea planting years increased and the results based on diversity indicated inconsistency. Principal coordinate analysis (PCoA) revealed that monoculture duration had the highest loading in structuring fungal communities. The relative abundance of Ascomycota, Glomeromycota, and Chytridiomycota decreased and Zygomycota and Basidiomycota increased with increasing cropping time. Continuous tea cropping not only decreased some beneficial fungal species such as Mortierella alpina and Mortierella elongatula, but also promoted potentially pathogenic fungal species such as Fusarium oxysporum, Fusarium solani, and Microidium phyllanthi over time. Overall, continuous tea cropping decreased soil pH and potentially beneficial microbes and increased soil pathogenic microbes, which could be the reason for reducing tea yield. Thus, developing sustainable tea farming to improve soil pH, microbial activity, and enhanced beneficial soil microbes under a continuous cropping system is vital for tea production.

scholarly journals Composition and function of rhizosphere microbiome of Panax notoginseng with discrepant yields

2020 ◽  
Author(s):  
Mengzhi Li ◽  
Zhongjian Chen ◽  
Jun Qian ◽  
Fugang Wei ◽  
Guozhuang Zhang ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Functional Traits ◽  
Cropping System ◽  
Panax Notoginseng ◽  
Continuous Cropping ◽  
Metagenomic Sequencing ◽  
Rhizosphere Microbiome ◽  
Functional Features ◽  
Continuous Cropping System ◽  
And Function

Abstract Background Panax notoginseng is a highly valuable medicinal plant. Reduced P. notoginseng yield is a common and serious problem that arises in a continuous cropping system. Variation in the composition and function of soil microbial community is considered the primary cause of yield reduction. Methods This study used shotgun metagenomic sequencing approaches to describe the taxonomic and functional features of P. notoginseng rhizosphere microbiome and screen microbial taxa and functional traits related to yields. Results A total of 43 families and 45 genera (relative abundance > 0.1%) were further confirmed to be related to P. notoginseng yields. Nitrosomonadaceae, Xanthomonadaceae, Mycobacterium and Arthrobacter that were enriched in soils with higher yields were positively correlated with P. notoginseng yields, thereby suggesting that they might increase yields. Negative correlation coefficients indicated that Xanthobacteraceae, Caulobacteraceae, Oxalobacteraceae, Chitinophagaceae, Sphingomonas, Hyphomicrobium, Variovorax and Phenylobacterium might be detrimental to P. notoginseng growth. A total of 85 functional traits were significantly (P < 0.05) correlated with P. notoginseng yields. Functional traits, likely steroid biosynthesis and MAPK signaling pathway were positively correlated with P. notoginseng yields. In contrast, functional traits, such as bacterial secretion system, ABC transporters, metabolism of xenobiotics by cytochrome P450 and drug metabolism–cytochrome P450, were negatively associated with yields. Conclusions This study describes an overview of the rhizosphere microbiome of P. notoginseng with discrepant yields and confirms the taxa and functional traits related to yields. Our results provide valuable information to guide the isolation and culture of potentially beneficial microorganisms and to utilize the power of the microbiome to increase plant yields in a continuous cropping system.

scholarly journals Composition and function of rhizosphere microbiome of Panax notoginseng with discrepant yields

2020 ◽  
Author(s):  
Mengzhi Li ◽  
Zhongjian Chen ◽  
Jun Qian ◽  
Fugang Wei ◽  
Guozhuang Zhang ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Functional Traits ◽  
Cropping System ◽  
Panax Notoginseng ◽  
Continuous Cropping ◽  
Metagenomic Sequencing ◽  
Rhizosphere Microbiome ◽  
Functional Features ◽  
Continuous Cropping System ◽  
And Function

Abstract Background: Panax notoginseng is a highly valuable medicinal plant. Reduced P. notoginseng yield is a common and serious problem that arises in a continuous cropping system. Variation in the composition and function of soil microbial community is considered the primary cause of yield reduction.Methods: This study used shotgun metagenomic sequencing approaches to describe the taxonomic and functional features of P. notoginseng rhizosphere microbiome and screen microbial taxa and functional traits related to yields. Results: At the family and genus level, a total of 43 families and 45 genera (relative abundance > 0.1%) were obtained, and the correlation with the yield of P. notoginseng was further analyzed. Nitrosomonadaceae, Xanthomonadaceae, Mycobacterium and Arthrobacter that were enriched in soils with higher yields were positively correlated with P. notoginseng yields, thereby suggesting that they might increase yields. Negative correlation coefficients indicated that Xanthobacteraceae, Caulobacteraceae, Oxalobacteraceae, Chitinophagaceae, Sphingomonas, Hyphomicrobium, Variovorax and Phenylobacterium might be detrimental to P. notoginseng growth. A total of 85 functional traits were significantly (P < 0.05) correlated with P. notoginseng yields. Functional traits, likely steroid biosynthesis and MAPK signaling pathway were positively correlated with P. notoginseng yields. In contrast, functional traits, such as bacterial secretion system, ABC transporters, metabolism of xenobiotics by cytochrome P450 and drug metabolism–cytochrome P450, were negatively associated with yields. Conclusions: This study describes an overview of the rhizosphere microbiome of P. notoginseng with discrepant yields and identifies the taxa and functional traits related to yields. Our results provide valuable information to guide the isolation and culture of potentially beneficial microorganisms and to utilize the power of the microbiome to increase plant yields in a continuous cropping system.

Physio-ecological and cytological features of ramie from continuous cropping system

2013 ◽  
Vol 38 (4) ◽  
pp. 360-365 ◽  
Author(s):  
Si-yuan ZHU ◽  
Tou-ming LIU ◽  
Qing-ming TANG ◽  
Shou-wei TANG
Keyword(s):  
Cropping System ◽  
Continuous Cropping ◽  
Cytological Features ◽  
Continuous Cropping System

Effect of an acidifying nitrogen fertiliser and lime on soil pH and wheat yields. 2. Plant response

1994 ◽  
Vol 34 (2) ◽  
pp. 247 ◽  
Author(s):  
MG Mason ◽  
WM Porter ◽  
WJ Cox
Keyword(s):  
Grain Yield ◽  
Cropping System ◽  
Gaeumannomyces Graminis ◽  
Continuous Cropping ◽  
Consistent Effect ◽  
P Rate ◽  
P Application ◽  
Continuous Cropping System ◽  
Plant Sampling ◽  
Yield Responses

This paper reports the effects of an acidifying fertiliser on wheat yields and mineral composition in the first 10 years of trials at Merredin, Wongan Hills, and Newdegate, described in the previous paper. There were grain yield increases from application (kg/ha.year) of 17.5 N + 7.6 P and 35 N + 15.2 P in all years except 1980 (Wongan Hills and Newdegate) and 1989 (Merredin). At Merredin, 3 t/ha of limestone increased grain yields in all years except 1982 and 1983. At Wongan Hills, limestone increased yields in the continuous cropping system, in the presence of high N + P, during 1986 and 1989. At Newdegate, grain yield responses to lime were recorded in 1980, 1981, 1982, 1986, 1988, and 1989; limestone resulted in decreased wheat yields in 1984 because of an increase in the severity of the root disease take-all (caused by Gaeumannomyces graminis var. tritici), and decreased lupin yields in 1987 because of manganese deficiency. There were a few responses at Merredin and Newdegate to low rates of limestone with each N + P application. Application of the magnesium (Mg) + potassium (K) + molybdenum (Mo) in addition to limestone gave isolated responses at all sites. Concentrations of calcium (Ca), Mg, and K at the 1989 plant sampling were highest at Wongan Hills and lowest at Merredin. Calcium concentrations were higher at Merredin and Newdegate following N + P application, but lower at Wongan Hills. Application of N + P reduced the concentration of Mg at Merredin and Wongan Hills, but increased Mg at Newdegate. The concentration of K was decreased at all sites by N + P. Limestone had no consistent effect on Ca concentrations but increased the concentrations of Mg and K at Merredin and K at Newdegate. Where Mg + K + Mo had been applied in 1980, concentrations of Ca decreased and K increased, while there was no consistent effect on Mg concentration. The Mo concentration in plant shoots was reduced at all sites by increasing rate of N + P and increased by application of lime and Mo in 1980. Grain Mo concentrations were very low at Merredin and Wongan Hills, even in the absence of N + P. Concentrations at Newdegate were reduced by increasing N + P rate. Application of limestone increased grain Mo concentrations at all sites, but these were still lowered by N + P application. Concentrations were also increased by the application of Mo in 1980, but fell with time, particularly with application of N + P.

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