Global population growth poses a threat to food security in an era of increased ecosystem degradation, climate change, soil erosion, and biodiversity loss. In this context, harnessing naturally-occurring processes such as those provided by plant-associated microorganisms presents promising strategy reduce dependency on agrochemicals. Biofertilizers are living microbes that enhance plant nutrition either mobilizing or increasing nutrient availability soils. Various microbial taxa including...

ABSTRACT The purpose of this study was to investigate the mechanism by which phytoremediation systems promote hydrocarbon degradation in soil. composition and capacity bulk soil microbial community during contaminated with aged hydrocarbons assessed. In soil, level catabolic genes involved ( ndoB , alkB xylE) as well mineralization hexadecane phenanthrene higher planted treatment cells than no plants. There detectable shift 16S ribosomal DNA (rDNA) between treatments, but there were...

Little is known about the composition and diversity of bacterial community associated with plant roots. The purpose this study was to investigate bacteria roots canola plants grown at three field locations in Saskatchewan, Canada. Over 300 rhizoplane 220 endophytic were randomly selected from agarâ€solidified trypticase soy broth, identified using fatty acid methyl ester (FAME) profiles. Based on FAME profiles, 18 genera a similarity index >0.3, but 73% isolates belonged four genera:...

Abundance of fungi and bacteria in long‐term no‐till (NT) intensively tilled (IT) soils the Northern Great Plains were measured using phospholipid fatty acid analysis (PLFA) to determine if a shift relative abundance occurs as result conversion NT. Four tillage trials located four different soil zones sampled spring 2005 2006 before crop was seeded evaluate effect on microbial community. With exception one site‐year, total, bacterial, fungal PLFA greater NT than IT at surface (0‐ 5‐cm depth)...

The use of plants to reduce contaminant levels in soil is a cost-effective method reducing the risk human and ecosystem health posed by contaminated sites. This review concentrates on plant-bacteria interactions that increase degradation hazardous organic compounds soil. Plants bacteria can form specific associations which plant provides with carbon source induces phytotoxicity Alternatively, nonspecific normal processes stimulate microbial community, course metabolic activity degrades...

ABSTRACT The introduction of transgenic plants into agricultural ecosystems has raised the question ecological impact these on nontarget organisms, such as soil bacteria. Although differences in both genetic structure and metabolic function microbial communities associated with some plant lines have been established, it remains to be seen whether an communities. We conducted a 2-year, multiple-site field study which rhizosphere samples canola variety conventional were sampled at six times...

Abstract Aims We evaluated the impact of fungal endophyte symbiosis on growth, ecophysiological and reproductive success wheat exposed to heat drought. Methods Results The resistance pot-grown or drought stress was measured by quantifying efficiency photosystem II (Fv/Fm), plant height, average seed weight (ASW), total (TSW), water-use (WUE) as well time 50% germination percentage second-generation seeds produced under stress, well-watered conditions. endophytic fungi tested increased...

Seed germination is a critical life stage for plants survival and timely seedling establishment especially in stressful environments. We hypothesized that fungal endophytes would improve wheat seed under heat drought stress. The hydrothermal time (HTT) model of conceptual useful predicting the timing energy (EG) given set conditions. HTT EG are applied, first time, to determine if one or more compatible endophytic fungi enhance tolerance wheat. Fungal tested dramatically increased percent...

Oil sands mining in northern Alberta impacts a large footprint, but the industry is committed to reclaim all disturbed land an ecologically healthy state response environmental regulations. However, these newly reconstructed landscapes may be limited by several factors that include low soil nutrient levels and reduced microbial activity. Rhizosphere microorganisms colonize plant roots providing hosts with nutrients, stimulating growth, suppressing disease increasing tolerance abiotic stress....

Rhizosphere and root associated bacteria are key components of plant microbiomes influence crop production. In sustainable agriculture, it is important to investigate diversity in various species how edaphic factors the bacterial microbiome. this study, we used high-throughput sequencing assess communities with rhizosphere interior canola, wheat, field pea, lentil grown at four locations Saskatchewan, Canada. exhibited distinct profiles among crops sampling locations. However, each was...

The composition and diversity of the bacterial community associated with plant roots is influenced by a variety factors such as root density exudation. In turn, these are breeding programs. This study assessed root-endophytic rhizosphere communities three canola cultivars (Parkland, Brassica rapa; Excel, B. napus; Quest, napus) grown at two field sites. derivative Excel developed Alberta Wheat Pool, has been genetically engineered to tolerate herbicide glyphosate. Approximately 2300 bacteria...