|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Diversity and conservation of Chinese wild begonias显示文摘Begonia, one of the most diverse plant taxa and the fifth or sixth largest angiosperm genus, consists of over1800 accepted species. The number of species recognized within this genus has greatly increased over the past 20 years, rising from 80 to 200 species in China alone. Based on recent field surveys, the number of begonia species in China is predicted to be between 250 and 300. Given the large number of begonia species that still remain to be described, further taxonomical work is urgently required. This is especially true for Chinese Begonia, in which there is a huge diversity of habitat, habit, plant size, leaf type, flower and fruit morphology, and most species are narrowly distributed in isolated habitats that are subject to negative disturbances from climate change, as well as agricultural and industrial activities. Although the conservation status for the majority of species has been evaluated using the standards of the International Union for Conservation of Nature, the results don't represent the truth in many species, and also about11.5% of which are data-absent. In addition, illegal collection and over-harvesting of wild begonias for ornamental or medicinal use has increased due to the rapid development of internet commerce. Far more often than predicted, these species should be categorized as rare and endangered and require immediate protection. Ex situ conservation of Chinese begonias started in 1995 and over 60% of the total species have been so far introduced into cultivation by several major botanical gardens in China. However, only few research institutions, limited funds and human resources have been involved in Begonia conservation;moreover, no project has conducted reintroduction. Therefore, more conservation-based work remains to be done. Improved conservation of Chinese begonias in the future depends on further field survey, an improved understanding of population diversity, and integrative approaches, including in situ and ex situ conservation, seed banking, and plant reintroduction. Species-targeted conservation zones should be established for endangered species excluded from the existing nature reserves. Additionally, laws pertaining to plant protection should be extended to prevent the illegal collection and transaction of wild plants, particularly for those species with unique habitats and small populations. | Daike Tian Yan Xiao Yi Tong Naifeng Fu Qingqing Liu Chun Li | 2018 | Plant Diversity2018，40，3： | 4 |
| 2 | Impact of dietary supplementation of b-hydroxybutyric acid on performance,nutrient digestibility,organ development and serum stress indicators in early-weaned goat kids显示文摘The objective of this study was to determine the effect of dietary supplementation of b-hydroxybutyric acid(BHBA)on performance,nutrient digestibility,organ development,and serum composition in earlyweaned goat kids.Sixty-four goat kids at 30 d of age were assigned to 4 treatments in a completely randomized design:1)control(basal diet);2)low(basal diet with 3 g/d per animal BHBA);3)medium(basal diet with 6 g/d per animal BHBA;and 4)high(basal diet with 9 g/d per animal BHBA).Subsequently,48(6 kids per treatment)goat kids were randomly selected and slaughtered at 60 and 90 d of age.Compared with the control group,BHBA at low and high doses increased body weight(P<0.05),average daily gain(P<0.01),and average daily starter intake(P<0.01).The BHBA improved organ development,especially at the lowest dose(P<0.01).The digestibility of dry matter and crude protein increased with age(P<0.05).However,BHBA did not affect nutrient digestibility.Compared with the control group,serum ceruloplasmin increased(P<0.05)with high BHBA level at 90 d of age.However,the serum creatinine(P<0.05)increased over time but was not affected by BHBA.The serum total antioxidant capacity and superoxide dismutase decreased with the high dose of BHBA at 90 d of age(P<0.01).In contrast,the serum glutathione peroxidase and malondialdehyde increased with the high doses of BHBA(P<0.01).Overall,low doses of BHBA were positive for growth performance,organ development,and health status against weaning stress.Whereas high doses of BHBA in the long term could negatively affect antioxidant status. | Mahmoud M.Abdelsattar Einar Vargas-Bello-Perez Yimin Zhuang Yuze Fu Naifeng Zhang | 2022 | Animal Nutrition2022，，2： | 1 |
| 3 | Rumen microbiota-host transcriptome interaction mediates the protective effects of trans-10,cis-12 CLA on facilitating weaning transition of lambs显示文摘Developing alternatives to antibiotics for prevention of gastrointestinal dysbiosis in early-weaning farmed animals is urgently needed.This study was to explore the potential effects of trans-10,cis-12 conjugated linoleic acid(CLA)on maintaining ruminal homeostasis of young ruminants during the weaning transition period.Thirty neonatal lambs were selected(6 lambs per group)and euthanized for rumen microbial and epithelial analysis.The lambs were weaned at 28 d and experienced the following 5 treatments:euthanized on d 28 as the pre-weaning control(CON0),fed starter feed for 5(CON5)or 21(CON21)d,fed starter feed with 1%of CLA supplemented for 5(CLA5)or 21(CLA21)d.Results showed that the average daily weight gain and dry matter intake were significantly higher in CLA5 than CON5 group.As compared with the CON5 and CON21 group,the relative abundances of volatile fatty acid(VFA)producing bacteria including Bacteroides,Treponema,Parabacteroides and Anaerovibrio,as well as the concentrations of acetate,butyrate and total VFA were significantly increased in CLA5 and CLA21 group,respectively.Integrating microbial profiling and epithelial transcriptome results showed that 7 downregulated inflammatory signaling-related host genes IL2RA,CXCL9,CD4,CCR4,LTB,SPP1,and BCL2A1 with CLA supplementation were significantly negatively correlated with both VFA concentration and VFA producing bacteria,while 3(GPX2,SLC27A2 and ALDH3A1)and 2(GSTM3 and GSTA1)upregulated metabolism-related genes,significantly positively correlated with either VFA concentration or VFA producing bacteria,respectively.To confirm the effects of CLA on epithelial signal transduction,in vitro experiment was further conducted by treating rumen epithelial cells without or with IL-17A+TNF-αfor 12 h after pretreatment of 100μM CLA or not(6 replicates per treatment).The results demonstrated the anti-inflammatory effect of CLA via suppressing the protein expression of NF-кB p-p65/p65 with the activation of peroxisome proliferator-activated receptor gamma(PPARγ).In conclusion,CLA supplementation enhanced the ruminal microbiota-driven transcriptional regulation in healthy rumen epithelial development via rumen VFA production,and CLA may therefore serve as an alternative way to alleviate early-weaning stress and improve physiological and metabolic conditions of young ruminants. | Chunlei Yang Xiangfei Deng Peter Lund Haixia Liu Xingwang Ding Zhengwei Fu Naifeng Zhang Jinjun Li Lifeng Dong | 2023 | Animal Nutrition2023，，1： | 0 |
| 4 | Transcriptomic and metabolomic insights into the roles of exogenous b-hydroxybutyrate acid for the development of rumen epithelium in young goats显示文摘Beta-hydroxybutyric acid(BHBA),as one of the main metabolic ketones in the rumen epithelium,plays critical roles in cellular growth and metabolism.The ketogenic capacity is associated with the maturation of rumen in young ruminants,and the exogenous BHBA in diet may promote the rumen development.However,the effects of exogenous BHBA on rumen remain unknown.This is the first study to investigate the mechanisms of BHBA on gene expression and metabolism of rumen epithelium using young goats as a model through multi-omics techniques.Thirty-two young goats were divided into control,low dose,middle dose,and high dose groups by supplementation of BHBA in starter(0,3,6,and 9 g/day,respectively).Results demonstrated the dietary of BHBA promoted the growth performance of young goats and increased width and length of the rumen papilla(P<0.05).Hub genes in host transcriptome that were positively related to rumen characteristics and BHBA concentration were identified.Several upregulated hub genes including NDUFC1,NDUFB4,NDUFB10,NDUFA11 and NDUFA1 were enriched in the gene ontology(GO)pathway of nicotinamide adenine dinucleotide(NADH)dehydrogenase(ubiquinone)activity,while ATP5ME,ATP5PO and ATP5PF were associated with ATP synthesis.RT-PCR revealed the expression of genes(HMGCS2,BDH1,SLC16A3,etc.)associated with lipolysis increased significantly by BHBA supplementation(P<0.05).Metabolomics indicated that some metabolites such as glucose,palmitic acid,cortisol and capric acid were also increased(P<0.05).This study revealed that BHBA promoted rumen development through altering NADH balance and accelerating lipid metabolism,which provides a theoretical guidance for the strategies of gastrointestinal health and development of young ruminants. | Yimin Zhuang Jianmin Chai Mahmoud M.Abdelsattar Yuze Fu Naifeng Zhang | 2023 | Animal Nutrition2023，，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员