Abstract Rice variety is one of the key factors regulating methane (CH 4 ) production and emission from paddy fields. However, relationships between rice varieties populations microorganisms involved in CH dynamics are poorly understood. Here we investigated composition abundance ‐producing archaea ‐oxidizing bacteria a Chinese field soil planted with three types rice. Hybrid produced 50–60% more shoot biomass than Indica Japonica cultivars. rate was similar to lower Indica. Furthermore,...

ABSTRACT Intermittent drainage can substantially reduce methane emission from rice fields, but the microbial mechanisms remain poorly understood. In present study, we determined rates of production and emission, dynamics ferric iron sulfate, abundance methanogen mcrA genes (encoding alpha subunit methyl coenzyme M reductase) their transcripts in response to alternate dry/wet cycles paddy field soil. We found that intermittent did not affect growth plants significantly reduced both emission....

Methanogens are known to inhabit not only the anaerobic bulk soil but also rhizosphere of rice plants. The release root exudates, a major carbon source for CH4 production in rhizosphere, is closely coupled plant photosynthesis. In present study we hypothesized that diel cycle photosynthetic activity may shape structure and function methanogens rice. We performed field experiment determine dynamics methanogen mcrA their transcripts soil. chemistry NH4 (+) , NO3 (-) SO4 (2-) Fe(II) remained...

A novel bacterium, designated strain L28T, was isolated from the rhizosphere soil of a mangrove plant in Hong Kong. Cells L28T are Gram-stain-positive, rod-shaped and endospore-forming. Optimum growth occurs at 37 °C (range, 20–45 °C), 0.5 % (w/v) NaCl 0–5.0 %) pH 7.5 6.5–9.0). The major fatty acids iso-C15 : 0 C16 1ω7c alcohol. respiratory quinone is MK-7. polar lipid profile comprises phospholipid, phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol two unidentified...

A novel bacterial strain, J103T, was isolated from rhizosphere soil of the mangrove plant Kandelia in Mai Po Inner Deep Bay Ramsar Site, Hong Kong. The strain aerobic, Gram-stain-negative, oval-shaped with folds middle, non-motile and non-spore-forming. It grew at temperatures 20-30 °C (optimum, 25-30 °C), pH 6.0-9.0 (optimum 6.0) NaCl concentrations 0.5-5.0 % (w/v) 1.0-2.0 %). Strain J103T able to reduce nitrate nitrite, hydrolyse urea, Tween 40 60. major polar lipids were aminolipid,...

Understanding the soil microbiology and physico-chemistry may contribute to efficient land utilization. A 10-year field experiment was conducted in Songnen Plain, China. High-throughput sequencing quantitative PCR of 16S rRNA methyl coenzyme M reductase (mcrA) genes were performed investigate dynamic changes archaeal community following long-term rice planting. Ten-year planting significantly decreased salinity alkalinity, including pH (7.6%), electrical conductivity (23.9%), sodium...

Context Rapid desalination by planting rice in saline soil consumes large amounts of water, which is not environmentally friendly. Aims Herein, we propose rapid rice, then shifting to cultivating upland plants attain substantial resource-saving and higher yield simultaneously with restoration saline-sodic soil. Methods Field experiments were run for two consecutive years five treatments: unreclaimed wasteland (WL) as control, cultivation followed fallow (RF), rice–rice continuous cropping...

Objective To investigate the effect of phakic posterior chamber implantable collamer lens (PPC-ICL) implantation surgery on accommodative status eyes with high myopia. Methods The study included 30 22-30 years old patients myopia. All underwent PPC-ICL in West China Hospital Sichuan University. Monocular amplitude, positive and negative relative accommodation facility were investigated before 1 month 3 months after surgery. The results analyzed by repeat measured...

Objective To explore the effect of reconstructing unilateral cleft lip by changing arc-shaped incision, combined with 3D reconstruction upper muscles. Methods Twenty patients were treated using a new surgical operation, muscle, to restore normal anatomy and stress mucous membrane, muscle skin. Operation scar was designed for straight line, located on philtral ridges contour line; phitrum rebuilt, postoperative reduced. Results A lot 20 had no local infection, hemorrhage, complex...

This study conducted laboratory column experiments to systematically examine the transport of novel heteroaggregates montmorillonite (Mt) microparticles with nanoscale zerovalent irons (nZVIs) in saturated sand at solution ionic strengths (ISs) ranging from 0.001 0.2 M. Spherical nZVIs were synthesized using liquid phase reduction method and attached on plate-shaped Mt surfaces monolayer. While complete deposition occurred for sand, significant was observed Mt-nZVI IS ≤ 0.01 M despite...