Aroma precursors of cigars from different tobacco parts and origins, and their correlations with sensory characteristics.

Cigars are developing rapidly around the world, but the content characteristics of aroma precursors and their contribution to sensory perception have not been fully elucidated. In this study, 69 aroma precursors from 61 tobaccos of different parts and origins were systematically determined, and the sensory characteristics of middle leaves from different origins and their correlation with aroma precursors were evaluated. The results showed that tobacco parts mainly affected amino acid content, and contents of nicotine, oxalic acid, malic acid, isovaleric acid, cystine, glutarnine, glycine, isoleucine, glutamicacid, asparticacid, and fructose-proline were significantly changed.

First report of Ludwigia yellow vein Vietnam virus causing leaf curling on tobacco plants in Hainan province, China.

Cigar tobacco (Nicotiana tabacum L.) has been recently introduced into China for various industrial applications. From March 2022, certain symptoms of begomovirus infection, including leaf curling and thickening of veins, were sporadically (disease incidence was approximately 0.

Identification, genetic diversity, and pathogenicity of Ralstonia pseudosolanacearum causing cigar tobacco bacterial wilt in China.

Ralstonia pseudosolanacearum, previously known as R. solanacearum species complex (RSSC) phylotypes I and III, is a plant pathogenic bacterium causing significant yield losses in economical crops. In the May of 2020 and 2021, cigar tobacco bacterial wilt was first observed in fields in Danzhou, Hainan Province, China.

Research progress on extraction, purification, structure and biological activity of polysaccharides.

Kimura et Migo () is a traditional medicinal and food homologous plant that has been used for thousands of years in folk medicine and nutritious food. Recent studies have shown that polysaccharide is one of the main biologically active components in . polysaccharides possess several biological activities, such as anti-oxidant, heptatoprotective, immunomodulatory, gastrointestinal protection, hypoglycemic, and anti-tumor activities.

Prevalence and Strain Composition of Circulating in Potato Fields in China's North-Central Province of Shanxi.

Potato is an important crop in Shanxi province, located in north-central China. In 2019 to 2020, 319 potato leaf samples were collected from eight locations distributed in three major potato production areas in Shanxi. BioChip testing revealed the presence of several potato viruses, of which (PVY) was the most common, reaching an incidence of 87.

Proteomic Analysis of Histone Crotonylation Suggests Diverse Functions in .

is one of the most important economic pests of cultivated crops. In the present study, we used an integrated approach involving high-performance liquid chromatography fractionation, affinity enrichment, and mass spectrometry-based proteomics to carry out a comprehensive proteomic analysis of lysine crotonylation in . Altogether, 7530 lysine crotonylation sites were identified in 2452 protein groups.

Reconstruction of the full-length transcriptome of cigar tobacco without a reference genome and characterization of anion channel/transporter transcripts.

Background: Cigar wrapper leaves are the most important raw material of cigars. Studying the genomic information of cigar tobacco is conducive to improving cigar quality from the perspective of genetic breeding. However, no reference genome or full-length transcripts at the genome-wide scale have been reported for cigar tobacco.

Construction of a SNP Fingerprinting Database and Population Genetic Analysis of Cigar Tobacco Germplasm Resources in China.

Cigar tobacco is an important economic crop that is widely grown around the world. In recent years, varietal identification has become a frequent problem in germplasm preservation collections, which causes considerable inconvenience and uncertainty in the cataloging and preservation of cigar germplasm resources, in the selection of parental lines for breeding, and in the promotion and use of high quality varieties. Therefore, the use of DNA fingerprints to achieve rapid and accurate identification of varieties can play an important role in germplasm identification and property rights disputes.

First Report of Cercospora nicotianae Causing Frog Eye Spot in Cigar Tobacco in Hainan, China.

Cigar tobacco (Nicotiana tabacum L.), sun air-cured tobacco, originally from South America, with a main use to rolling cigar wrapper that is different from flue-cured tobacco. In April, 2018, diseased leaves were observed in cigar tobacco in some fields in Danzhou city (109.

Chiral determination of nornicotine, anatabine and anabasine in tobacco by achiral gas chromatography with (1S)-(-)-camphanic chloride derivatization: Application to enantiomeric profiling of cultivars and curing processes.

The alkaloid enantiomers are well-known to have different physiological and pharmacological effects, and to play an important role in enantioselectivity metabolism with enzymes catalysis in tobacco plants. Here, we developed an improved method for simultaneous and high-precision determination of the individual enantiomers of nornicotine, anatabine and anabasine in four tobacco matrices, based on an achiral gas chromatography-nitrogen phosphorus detector (GCNPD) with commonly available Rtx-200 column using (1S)-(-)-camphanic chloride derivatization. The method development consists of the optimization of extraction and derivatization, screening of achiral column, analysis of the fragmentation mechanisms and evaluation of matrix effect (ME).

Identification of Genes/Proteins Related to Submergence Tolerance by Transcriptome and Proteome Analyses in Soybean.

Flooding can lead to yield reduction of soybean. Therefore, identification of flooding tolerance genes has great significance in production practice. In this study, Qihuang 34, a highly-resistant variety to flooding stress, was selected for submergence treatments.

Production of alkaline pectinase: a case study investigating the use of tobacco stalk with the newly isolated strain Bacillus tequilensis CAS-MEI-2-33.

Background: Tobacco stalk (TS), a major agricultural waste abundant in pectin, has resulted in concerns about the need for its reuse. The nicotine in TS is considered a chemical that is to\xic and hazardous to the environment.

Results: In this study, Bacillus tequilensis CAS-MEI-2-33 was isolated from cigar wrappers to produce alkaline pectinase using TS.

Emission level of seven mainstream smoke toxicants from cigarette with variable tobacco leaf constituents.

[Introduction] Seven smoke constituents, including hydrogen cyanide (HCN), ammonia (NH), phenol, benzo[α]pyrene (B[a]P), carbon monoxide (CO)¸ crotonaldehyde, and 4-(methylnitrosamino)-1- (3-pyridyl)-1-butanone (NNK), are proposed be the most relevant constituents for smoking-related diseases. [Methods] Different combinations of leaf stalk positions, varieties and locations were used to create variable chemistry of cigarette filler and smoke. Experimental cigarettes were measured for emission level of seven smoke toxicants and content of seventy-three filler components.