The needles of Taxus wallichiana gave a taxoid 1-hydroxy- 2-deacetoxy-5-decinnamoyl-taxinine j, whose structure has been established by spectroscopic data and confirmed by X-ray crystallography. The taxoid possesses significant cytotoxic and immunomodulatory activity.
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Z/E configuration controlled by a Taxus sesquiterpene synthase facilitating the biosynthesis of (3Z,6E)-α-farnesene.
Phytochemistry
January 2025
State Key Laboratory of Southwestern Chinese Medicine Resources, and Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China. Electronic address:
Plant enzymes often present advantages in the synthesis of natural products with specific configurations. Farnesene is a pharmacologically active sesquiterpene with three natural Z/E configurations, among which the enzyme selectively responsible for the biosynthesis of (3Z,6E)-α-farnesene remains elusive. Herein, a sesquiterpene synthase TwSTPS1 biosynthesizing (3Z,6E)-α-farnesene as the major product was identified from Taxus wallichiana through genome mining.
View Article and Find Full Text PDFA new bicyclo [3.3.1]nonadienemethanol-type lignan from the leaves of Zucc.
Nat Prod Res
October 2024
Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.
Article Synopsis
- A new bicyclo[3.3.1]nonadienemethanol-type lignan called 9,9'-oxidolanceolatanin B, along with four known lignans, was isolated from Zucc. leaves through a study focusing on α-glucosidase inhibition.
- The structure of 9,9'-oxidolanceolanceolatanin B was determined using NMR spectroscopy and ECD data.
- All isolated compounds exhibited stronger α-glucosidase inhibitory effects than the standard drug acarbose, suggesting that Zucc. leaves may be a valuable source for developing plant-based anti-diabetic treatments.
Relationship between tree species diversity and water holding capacity of litter layer in subtropical region.
Ying Yong Sheng Tai Xue Bao
July 2024
School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China.
Litter layer, serving as the "skin" of forest soil, plays a crucial role in conserving water resources and maintaining soil and water conservation. We analyzed the relationship of tree species richness, community weighted mean traits, and functional diversity with the standing mass, maximum water holding rate, and effective water sto-rage capacity of litters from various tree species including , , , , , , , and their combinations of mixed forests in subtropical region. The results showed that across various tree species combinations, the ranges of maximum water holding rate, standing litter mass and effective water storage capacity of undecomposed layer were 0-419%, 0-0.
View Article and Find Full Text PDFDe novo assembly and comprehensive analysis of the mitochondrial genome of Taxus wallichiana reveals different repeats mediate recombination to generate multiple conformations.
Genomics
September 2024
National Engineering Laboratory of Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
Taxus plants are the exclusive source of paclitaxel, an anticancer drug with significant medicinal and economic value. Interspecies hybridization and gene introgression during evolution have obscured distinctions among Taxus species, complicating their phylogenetic classification. While the chloroplast genome of Taxus wallichiana, a widely distributed species in China, has been sequenced, its mitochondrial genome (mitogenome) remains uncharacterized.
View Article and Find Full Text PDFForaging for the future: traditional culinary uses of wild plants in the Western Himalayas-Kashmir Valley (India).
J Ethnobiol Ethnomed
July 2024
Department of Ethnobotany, Institute of Botany, Ilia State University, 0105, Tbilisi, Georgia.
Background: In the intricate tapestry of food security, wild food species stand as pillars, nourishing millions in low-income communities, and reflecting the resilience and adaptability of human societies. Their significance extends beyond mere sustenance, intertwining with cultural traditions and local knowledge systems, underscoring the importance of preserving biodiversity and traditional practices for sustainable livelihoods.
Methods: The present study, conducted between February 2022 and August 2023 along the Line of Control in India's Kashmir Valley, employed a rigorous data collection encompassing semi-structured interviews, focus group discussions, and specific field observations facilitated through a snowball sampling technique.
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