Soil pH effects on phosphorus mobilization in the rhizosphere of Lupinus angustifolius

2021 ◽  
Author(s):  
Moussa Bouray ◽  
James Laing Moir ◽  
Niklas Jussi Lehto ◽  
Leo Murtagh Condron ◽  
Driss Touhami ◽  
...  
Keyword(s):  
Soil Ph ◽  
Lupinus Angustifolius ◽  
Ph Effects

Do fungi and bacteria respond similar across a steep local pH gradient?

2021 ◽  
Author(s):  
Rasmus Kjoller ◽  
Carla Cruz-Paredes
Keyword(s):  
Community Composition ◽  
Soil Ph ◽  
Wood Ash ◽  
Ph Gradient ◽  
Fungal Communities ◽  
Ph Effects ◽  
Fungal Community Composition ◽  
Ph Gradients ◽  
Field Samples ◽  
Bacterial Richness

<p>Soil pH is consistently recorded as the single most important variable explaining bacterial richness and community composition locally as globally. Bacterial richness responds to soil pH in a bell-shaped pattern, highest in soils with near-neutral pH, while lower diversity is found in soil with pH >8 and <4.5. Also, community turnover is strongly determined by pH for bacteria. In contrast, pH effects on fungi is apparently less pronounced though also much less studied compared to bacteria. Still, pH appears to be a significant determinant for fungal communities but typically not the most important. Rarely are bacterial and fungal communities co-analyzed from the same field samples taken across pH gradients. Here we analyze the community responses of fungi and bacteria in parallel over an extreme pH gradient ranging from pH 4 to 8 established by applying strongly alkaline wood ash to replicated plots in a Picea abies plantation. Bacterial and fungal community composition were assessed by amplicon-based meta-barcoding. Bacterial richness were not significantly affected by pH, while fungal richness and a-diversity were stimulated with higher pH. We found that both, bacterial and fungal communities increasingly deviated from the untreated plots with increasing amount of wood ash though fungal communities were more resistant to changes than bacterial. Soil NH<sub>4</sub>, NO<sub>3</sub> and pH significantly correlated with the NMDS pattern for both bacterial and fungal communities. In the presentation we will discuss resistance versus sensitivity of different fungal functional guilds towards higher pH as well as the underlying factors explaining the community changes.</p>

Soil pH effects on the toxicity of zinc oxide nanoparticles to soil microbial community

2018 ◽  
Vol 25 (28) ◽  
pp. 28140-28152 ◽  
Author(s):  
Concepción García-Gómez ◽  
María Dolores Fernández ◽  
Sandra García ◽  
Ana Francisca Obrador ◽  
Marta Letón ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Microbial Community ◽  
Soil Ph ◽  
Soil Microbial Community ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Ph Effects ◽  
Soil Microbial

scholarly journals Contrasting Soil pH Effects on Fungal and Bacterial Growth Suggest Functional Redundancy in Carbon Mineralization

2009 ◽  
Vol 75 (6) ◽  
pp. 1589-1596 ◽  
Author(s):  
Johannes Rousk ◽  
Philip C. Brookes ◽  
Erland Bååth
Keyword(s):  
Soil Ph ◽  
Bacterial Growth ◽  
Carbon Mineralization ◽  
Fungal Growth ◽  
Functional Redundancy ◽  
Ph Gradient ◽  
Total Carbon ◽  
Ph Effects ◽  
Acetate Incorporation ◽  
Growth Ratio

ABSTRACT The influence of pH on the relative importance of the two principal decomposer groups in soil, fungi and bacteria, was investigated along a continuous soil pH gradient at Hoosfield acid strip at Rothamsted Research in the United Kingdom. This experimental location provides a uniform pH gradient, ranging from pH 8.3 to 4.0, within 180 m in a silty loam soil on which barley has been continuously grown for more than 100 years. We estimated the importance of fungi and bacteria directly by measuring acetate incorporation into ergosterol to measure fungal growth and leucine and thymidine incorporation to measure bacterial growth. The growth-based measurements revealed a fivefold decrease in bacterial growth and a fivefold increase in fungal growth with lower pH. This resulted in an approximately 30-fold increase in fungal importance, as indicated by the fungal growth/bacterial growth ratio, from pH 8.3 to pH 4.5. In contrast, corresponding effects on biomass markers for fungi (ergosterol and phospholipid fatty acid [PLFA] 18:2ω6,9) and bacteria (bacterial PLFAs) showed only a two- to threefold difference in fungal importance in the same pH interval. The shift in fungal and bacterial importance along the pH gradient decreased the total carbon mineralization, measured as basal respiration, by only about one-third, possibly suggesting functional redundancy. Below pH 4.5 there was universal inhibition of all microbial variables, probably derived from increased inhibitory effects due to release of free aluminum or decreasing plant productivity. To investigate decomposer group importance, growth measurements provided significantly increased sensitivity compared with biomass-based measurements.

scholarly journals Nitrogen, Phosphorus, and Soil pH Effects on Goldenseal (Hydrastis canadensis L.) Growth, Root Yield, and Quality

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 673d-673
Author(s):  
Jeanine M. Davis
Keyword(s):  
Soil Ph ◽  
Ph Effects ◽  
Root Weight ◽  
Root Yield ◽  
Hydrastis Canadensis ◽  
Yield And Quality ◽  
Lath Structure ◽  
N Rates ◽  
Fibrous Roots ◽  
Nitrogen Phosphorus

Goldenseal was grown in pots of forest soil under a wood-lath structure for 3 years. Soil treatments consisted of four pH levels (4.5, 5.5, 6.5, and 7.5) and four rates of P and N (P or N at 0, 0.1, 0.2, and 0.3 kg·m–3 of soil) arranged as a RCB factorial with eight replications. Final root weights were highest with pH 5.5 and 6.5. Although response to N and P rates varied from year to year, final root weights showed no response to P and decreased with increasing N. Increase in fresh weight from initial weight of the planting stock to final total root weight ranged from 5.7× (pH 4.5, P at 0 kg·m–3, and N at 0.3 kg·m–3 treatment) to 28.5× (pH 5.5, P at 0.2 kg·m–3, and 0 N treatment). Flowering, fruit set, plant height, leaf number, and fibrous roots: rhizome ratio were highest at pH 5.5 and 6.5 and not influenced by P or N rates. Preliminary analysis suggest that root alkaloid content was also affected by soil pH.

scholarly journals Soil pH Effects on Nutrient Availability in the Everglades Agricultural Area

EDIS ◽  
2009 ◽  
Vol 2009 (4) ◽  
Author(s):  
Alan L. Wright ◽  
Edward A. Hanlon ◽  
David Sui ◽  
Ronald W. Rice
Keyword(s):  
Soil Ph ◽  
Nutrient Availability ◽  
Agricultural Soils ◽  
Agricultural Area ◽  
Ph Effects ◽  
Sources Of Information ◽  
Fact Sheet ◽  
Everglades Agricultural Area ◽  
Water Science ◽  
Soil And Water

SL287, a 5-page fact sheet by Alan L. Wright, Edward A. Hanlon, David Sui, and Ronald Rice, identifies strategies that could be used to address the problem of the increasing pH in muck soils. Includes additional sources of information. Published by the UF Department of Soil and Water Science, May 2009. SL287/SS500: Managing pH in the Everglades Agricultural Soils (ufl.edu)

Chloride, Soil Solution Osmotic Potential, and Soil pH Effects on Nitrification

1986 ◽  
Vol 50 (4) ◽  
pp. 941-945 ◽  
Author(s):  
R. J. Roseberg ◽  
N. W. Christensen ◽  
T. L. Jackson
Keyword(s):  
Soil Solution ◽  
Soil Ph ◽  
Osmotic Potential ◽  
Ph Effects

Correlation between soil pH of collection site and the tolerance of wild genotypes of Lupinus angustifolius L. to neutral pH

1998 ◽  
Vol 38 (4) ◽  
pp. 355 ◽  
Author(s):  
A. D. Robson ◽  
C. Tang
Keyword(s):  
Seed Size ◽  
Soil Ph ◽  
Root Elongation ◽  
Chlorophyll Concentration ◽  
Lupinus Angustifolius ◽  
Root Weight ◽  
Collection Site ◽  
High Ph ◽  
Nodule Number ◽  
Wide Range

Summary. Lupinus angustifolius L. grows poorly on alkaline soils, and high pH appeared to be a major limiting factor. In this study, 30 wild genotypes of this species collected from soils with a wide range of pH (4.2–9.0) and texture (coarse sand–clay) were grown in nutrient solution for 22 days to examine their tolerance of pH 7. Cultivars of L. angustifolius, L. pilosus, L. luteus and Pisum sativum were included for comparison. Root length, nodule number, chlorophyll and iron concentrations in leaves were lower in almost all wild genotypes grown at pH 7.0 compared with those at pH 5.2. However, there was large variation in growth and nodulation in response to high pH among genotypes. Compared with the value at pH 5.2, shoot weight at pH 7.0 ranged from 41 to 120%, chlorophyll concentration from 8 to 75%, iron concentration from 22 to 70%, root weight from 27 to 109%, root elongation rate from 61 to 96% and nodule number from 0 to 86%. However, the tolerance (as assessed by growth and nodulation) of these wild genotypes to pH 7.0 was not correlated with soil pH or texture at collection site, but iron chlorosis at pH 7.0 was weakly correlated with collection site soil texture (r = –0.36, n = 30) and seed size (r = –0.45, n = 30), and early root elongation correlated with seed size (r = –0.55, n = 30). In addition, some wild genotypes appeared to be more tolerant to pH 7.0 than existing cultivars of L. angustifolius. The results confirm that soil pH at collection site (as recorded in the Agriculture Western Australia International Lupin Collection) is not a useful indicator for selecting high pH-tolerant genotypes of L. angustifolius.

Soil pH Effects on Nitrification of Fall-Applied Anhydrous Ammonia

2004 ◽  
Vol 68 (2) ◽  
pp. 545 ◽  
Author(s):  
Peter M. Kyveryga ◽  
Alfred M. Blackmer ◽  
Jason W. Ellsworth ◽  
Ramon Isla
Keyword(s):  
Soil Ph ◽  
Ph Effects ◽  
Anhydrous Ammonia

scholarly journals Soil pH effects on the comparative toxicity of dissolved zinc, non-nano and nano ZnO to the earthwormEisenia fetida

2013 ◽  
Vol 8 (5) ◽  
pp. 559-572 ◽  
Author(s):  
Laura R. Heggelund ◽  
Maria Diez-Ortiz ◽  
Stephen Lofts ◽  
Elma Lahive ◽  
Kerstin Jurkschat ◽  
...  
Keyword(s):  
Soil Ph ◽  
Ph Effects ◽  
Nano Zno ◽  
Comparative Toxicity

Soil pH Effects on Nitrification of Fall-Applied Anhydrous Ammonia

2004 ◽  
Vol 68 (2) ◽  
pp. 545-551 ◽  
Author(s):  
Peter M. Kyveryga ◽  
Alfred M. Blackmer ◽  
Jason W. Ellsworth ◽  
Ramon Isla
Keyword(s):  
Soil Ph ◽  
Ph Effects ◽  
Anhydrous Ammonia
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