Effects of Soil Environment on Field Efficacy of Microbial Inoculants

Khare, Ekta; Arora, Naveen Kumar

doi:10.1007/978-81-322-2068-8_19

Cited by 36 publications

(23 citation statements)

References 200 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At first glance, this result appears to be at odds with our findings for soil water content. However, it may indicate that atmospheric-CH 4 uptake in these soils was at least occasionally limited by water availability, i.e., when the latter dropped below the lower limit of favorable conditions (ϳ20% water saturation) (41,42). At a low soil water content, water exists primarily in small pores and as films coating mineral particles (43,44).…”

Section: Discussionmentioning

confidence: 99%

High Temporal and Spatial Variability of Atmospheric-Methane Oxidation in Alpine Glacier Forefield Soils

Chiri

Nauer

Rainer

et al. 2017

Appl Environ Microbiol

View full text Add to dashboard Cite

Glacier forefield soils can provide a substantial sink for atmospheric CH 4 , facilitated by aerobic methane-oxidizing bacteria (MOB). However, MOB activity, abundance, and community structure may be affected by soil age, MOB location in different forefield landforms, and temporal fluctuations in soil physical parameters. We assessed the spatial and temporal variability of atmospheric-CH 4 oxidation in an Alpine glacier forefield during the snow-free season of 2013. We quantified CH 4 flux in soils of increasing age and in different landforms (sandhill, terrace, and floodplain forms) by using soil gas profile and static flux chamber methods. To determine MOB abundance and community structure, we employed pmoA gene-based quantitative PCR and targeted amplicon sequencing. Uptake of CH 4 increased in magnitude and decreased in variability with increasing soil age. Sandhill soils exhibited CH 4 uptake rates ranging from Ϫ3.7 to Ϫ0.03 mg CH 4 m Ϫ2 day Ϫ1 . Floodplain and terrace soils exhibited lower uptake rates and even intermittent CH 4 emissions. Linear mixed-effects models indicated that soil age and landform were the dominating factors shaping CH 4 flux, followed by cumulative rainfall (weighted sum Յ4 days prior to sampling). Of 31 MOB operational taxonomic units retrieved, ϳ30% were potentially novel, and ϳ50% were affiliated with upland soil clusters gamma and alpha. The MOB community structures in floodplain and terrace soils were nearly identical but differed significantly from the highly variable sandhill soil communities. We concluded that soil age and landform modulate the soil CH 4 sink strength in glacier forefields and that recent rainfall affects its shortterm variability. This should be taken into account when including this environment in future CH 4 inventories. IMPORTANCE Oxidation of methane (CH 4 ) in well-drained, "upland" soils is an important mechanism for the removal of this potent greenhouse gas from the atmosphere. It is largely mediated by aerobic, methane-oxidizing bacteria (MOB). Whereas there is abundant information on atmospheric-CH 4 oxidation in mature upland soils, little is known about this important function in young, developing soils, such as those found in glacier forefields, where new sediments are continuously exposed to the atmosphere as a result of glacial retreat. In this field-based study, we investigated the spatial and temporal variability of atmospheric-CH 4 oxidation and associated MOB communities in Alpine glacier forefield soils, aiming at better understanding the factors that shape the sink for atmospheric CH 4 in this young soil ecosystem. This study contributes to the knowledge on the dynamics of atmospheric-CH 4 oxidation in developing upland soils and represents a further step toward the inclusion of Alpine glacier forefield soils in global CH 4 inventories.KEYWORDS atmospheric-methane oxidation, glacier forefield soil, high-affinity MOB, methanotroph, methane flux, proglacial landforms, pmoA Citation Chiri E, Nauer PA, Rainer E-M, Zeyer J, Schroth M...

show abstract

Section: Discussionmentioning

confidence: 99%

High Temporal and Spatial Variability of Atmospheric-Methane Oxidation in Alpine Glacier Forefield Soils

Chiri

Nauer

Rainer

et al. 2017

Appl Environ Microbiol

View full text Add to dashboard Cite

show abstract

“…Abiotic stresses such as drought, salinity, extreme temperatures, heavy metal toxicity, and oxidative stress are severe threats to agroecosystems ( Wang et al, 2003 ; Khare and Arora, 2015 ). The molecular mechanisms adopted by endophytes for increasing stress tolerance in plants include induction and expression of stress-responsive genes, generation of scavenger molecules like ROS, and synthesis of antistress metabolites ( Lata et al, 2018 ).…”

Section: Endophytes Affecting Host Genetic and Phenotypic Expressionsmentioning

confidence: 99%

Multifaceted Interactions Between Endophytes and Plant: Developments and Prospects

2018

Self Cite

View full text Add to dashboard Cite

Microbial endophytes are present in all known plant species. The ability to enter and thrive in the plant tissues makes endophytes unique, showing multidimensional interactions within the host plant. Several vital activities of the host plant are known to be influenced by the presence of endophytes. They can promote plant growth, elicit defense response against pathogen attack, and can act as remediators of abiotic stresses. To date, most of the research has been done assuming that the interaction of endophytes with the host plant is similar to the plant growth-promoting (PGP) microbes present in the rhizosphere. However, a new appreciation of the difference of the rhizosphere environment from that of internal plant tissues is gaining attention. It would be interesting to explore the impact of endosymbionts on the host’s gene expression, metabolism, and other physiological aspects essential in conferring resistance against biotic and abiotic stresses. A more intriguing and inexplicable issue with many endophytes that has to be critically evaluated is their ability to produce host metabolites, which can be harnessed on a large scale for potential use in diverse areas. In this review, we discuss the concept of endophytism, looking into the latest insights related to the multifarious interactions beneficial for the host plant and exploring the importance of these associations in agriculture and the environment and in other vital aspects such as human health.

show abstract

“…Consequence of that, the growth of yield became downwards in addition to high utilization of chemical fertilizers caused poor soil health due to lack of organic matter, loss of inherent fertility (Mahajan and Gupta, 2009;Khare and Arora, 2015) by affecting soil micro flora and fauna (Gupta and Singh, 2008). Even it also impaired the health of human beings and animals (Gupta and Singh, 2006;Khare and Arora, 2015).…”

Section: Issn: 2319-7706 Volume 6 Number 11 (2017) Pp 1177-1186mentioning

confidence: 99%

“…Even it also impaired the health of human beings and animals (Gupta and Singh, 2006;Khare and Arora, 2015).…”

Section: Issn: 2319-7706 Volume 6 Number 11 (2017) Pp 1177-1186mentioning

confidence: 99%

See 1 more Smart Citation

Biofertilizer as Prospective Input for Sustainable Agriculture in India

Barman¹,

Paul²,

Choudhury³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

View full text Add to dashboard Cite

Effects of Soil Environment on Field Efficacy of Microbial Inoculants

Cited by 36 publications

References 200 publications

High Temporal and Spatial Variability of Atmospheric-Methane Oxidation in Alpine Glacier Forefield Soils

High Temporal and Spatial Variability of Atmospheric-Methane Oxidation in Alpine Glacier Forefield Soils

Multifaceted Interactions Between Endophytes and Plant: Developments and Prospects

Biofertilizer as Prospective Input for Sustainable Agriculture in India

Contact Info

Product

Resources

About