, a new species of Piperaceae from Xizang, China.

X.W.Qin, F.

, a new species of Gesneriaceae from Yunnan, China.

F.Su, C.Y.

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants.

Piper nigrum L. (black pepper) is a typical woody vine that is an economically important spice crop across the world. Black pepper production is significantly impacted by root rot disease caused by Phytophthora capsici, which has seriously influenced the industry development as a "choke point" problem.

Comparative Transcriptome and Metabolome Analysis of Resistant and Susceptible Species Upon Infection by the Oomycete .

is a destructive oomycete pathogen that causes devastating disease in black pepper, resulting in a significant decline in yield and economic losses. (black pepper) is documented as susceptible to , whereas its close relative is known to be resistant. However, the molecular mechanism underlying the resistance of remains obscure.

Chemical Composition and Acetylcholinesterase Inhibitory Activity of Essential Oils from Piper Species.

The essential oils (EOs) derived from aromatic plants such as Piper species are considered to play a role in alleviating neuronal ailments that are associated with inhibition of acetylcholinesterase (AChE). The chemical compositions of 23 EOs prepared from 16 Piper spp. were analyzed by both gas chromatography with a flame ionization detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS).

Chemical constituents from Piper hainanense and their cytotoxicities.

Two new compounds, (Z,R)-1-phenylethylcinnamate (1) and (1R,2R,3R,6S)-pipoxide (2) were isolated from the aerial part of Piper hainanense, along with 12 known compounds, including nine benzene derivatives (4-11), one isobutylamide (12), and two polyoxygenated cyclohexene derivatives (13-14). Their structures were elucidated on the basis of the HRESIMS, 1D and 2D NMR spectroscopic analyses, and ECD in cases of 2 and 3. The absolute configuration of ellipeiopsol B (3) was determined for the first time.

Volatile organic compound emissions from different stages of Cananga odorata flower development.

Headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to identify the volatile organic compounds (VOCs) of the different flower development stages of Cananga odorata for the evaluation of floral volatile polymorphism as a basis to determine the best time of harvest. Electronic nose results, coupled with discriminant factor analysis, suggested that emitted odors varied in different C. odorata flower development stages, including the bud, display-petal, initial-flowering, full-flowering, end-flowering, wilted-flower, and dried flower stages.

[Point pattern analysis of different age-class Taxus chinensis var. mairei individuals in mountainous area of southern Anhui Province].

By using O-ring statistics in point pattern analysis and Programita software, this paper studied the spatial distribution patterns and associations of different age-class individuals of Taxus chinensis var. mairei populations at Xianyu and Xiaxiang in the mountainous area of southern Anhui Province. The Xianyu population had a random spatial distribution at the scales from 2 m to 25 m but a clumped distribution at the scales < 2 m, while the Xiaxiang population distributed randomly at all the scales.

[Population structure of endangered Monimopetalum chinense and its relationships with environmental factors].

Based on the field investigation data obtained from the typical plots of four community types, i. e. , secondary shrub, Phyllostachys edulis forest, Cunninghamia lanceolata forest, and Pinus massoniana forest, in the Zongli Village of Qimen County in Anhui Province, this paper studied the mean basal diameter and structure of Monimopetalum chinense population, and the effects of environmental factors on the population characteristics.

[The applications of fourier transform infrared spectroscopy in resolving some taxonomic doubts of Caprifoliaceae].

Fourier transform infrared spectroscopy (FTIR) provides biochemical profiles containing overlapping signals from a majority of the compounds that are present when whole.samples are analyzed. The spectra of the xylem of 112 samples belonging to 12 species and 5 genera in Caprifoliaceae were determined directly with FTIR spectrometry and OMNI-sampler.

[Identification of soybean varieties by direct determination of FTIR spectrum].

The spectra of cotyledons and outer layer parts of skins of eight kinds of soybeans were determined by FTIR spectrometry with OMNI-sampler directly, fast and accurately. The absorption peaks of the spectra w ere analyzed. Results from the comparison of the spectra showed some differences in the intensity and the shape of absorption peaks of their FTIR spectra, especially in the range of 1800-1200 cm(-1), which mainly reflected the substituent nature of amide I and II of protein.