In order to study the linkages between crop straw decomposition rate and change in soil biological properties after returned with different iron (Fe2+) contents, a 180-day incubation experiment was performed examine of maize (MS) under three Fe2+ levels, i.e., 0, 0.3, 1 mg g−1. Enzyme activities regarding microbial communities 0 g−1 Fe addition were also detected. The results showed that signif...

This study aimed to analyze the genetic variability and estimate diversity parameters of 23 elite papaya lines based on microsatellite molecular markers. The plant material was composed lines, 18 from 'Formosa' five 'Solo' group. expected heterozygosity (HE), observed (HO), coefficient inbreeding (ƒ) for each genotype were estimated. weighted index obtained dissimilarity matrix, estimated dista...

Petrocoptis montsicciana and P. pardoi are two Iberian endemic taxa of Caryophyllaceae family with an unclear taxonomic delimitation, being variously treated as independent species, subspecies or even synonyms. In the present study, allozyme raw data obtained in early 2000s have been reused improved tools to survey genetic structure, complemented modeling niche comparative analyses shed light o...

Background: Oral microbiota are considered major players in the development of periodontal diseases. Thorough knowledge of intact subgingival microbiomes is required to elucidate microbial shifts from health to disease. Aims: This comparative study investigated the subgingival microbiome of healthy children, possible inter- and intra-individual effects of modified sampling, and basic comparabil...

Analysis of crop genetic diversity and structure provides valuable information needed to broaden the narrow genetic base as well as to enhance the breeding and conservation strategies of crops. In this study, 95 Austrian and Belgian wheat cultivars maintained at the Centre for Genetic Resources (CGN) in the Netherlands were characterised using 1052 diversity array technology (DArT) markers to e...

Abstract The discharge of acid mine drainage from abandoned high sulfur (S) coal mines has caused serious pollution in the Shandi River, Yangquan, Shanxi Province. To determine impact long-term on microorganisms river, we collected river sediments a polluted tributary (Group P) and mainstream River R) to study bacterial diversity community composition. results showed that was seriously by mines...

Under paddy field conditions, biological sulfur oxidation occurs in the oxidized surface soil layer and rhizosphere, in which oxygen leaks from the aerenchyma system of rice plants. In the present study, we examined community shifts in sulfur-oxidizing bacteria associated with the oxidized surface soil layer and rice roots under different sulfur fertilization conditions based on the 16S ribosom...

Sequence-related amplified polymorphism (SRAP) markers were used to investigate the genetic diversity among 30 populations of Toona ciliata Roem. sampled from the species’ distribution area in China. To analyze the polymorphism in the SRAP profiles, 1505 primer pairs were screened and 24 selected. A total of 656 SRAP bands ranging from 100 to 1500 bp were acquired, of these 505 bands (77%) were...

Background Elymus sibiricus is an important native grass in Qinghai-Tibetan Plateau. Seed shattering is a serious problem for E. sibiricus, especially at harvest time. Cross breeding is an effective way to create new varieties with beneficial characteristic or improved traits, and to broaden genetic base. Results In this study, we created five hybrid populations by crossing seven E. sibiricus...

BACKGROUND The operational taxonomic unit (OTU) is widely used in microbial ecology. Reproducibility in microbial ecology research depends on the reliability of OTU-based 16S ribosomal subunit RNA (rRNA) analyses. RESULTS Here, we report that many hierarchical and greedy clustering methods produce unstable OTUs, with membership that depends on the number of sequences clustered. If OTUs are re...