Carbon（C） storage has received significant attention for its relevance to agricultural security and climate change. Afforestation can increase C storage in terrestrial ecosystems, and has been recognized as an impor...Carbon（C） storage has received significant attention for its relevance to agricultural security and climate change. Afforestation can increase C storage in terrestrial ecosystems, and has been recognized as an important measure to offset CO_2 emissions. In order to analyze the C benefits of planting wolfberry（Lycium barbarum L.） on the secondary saline lands in arid areas, we conducted a case study on the dynamics of biomass carbon（BC） storage and soil organic carbon（SOC） storage in different-aged wolfberry plantations（4-, 7-and 11-year-old） established on a secondary saline land as well as on the influence of wolfberry plantations on C storage in the plant-soil system in an arid irrigated area（Jingtai County） of Gansu Province, China. The C sequestration and its potential in the wolfberry plantations of Gansu Province were also evaluated. An intact secondary saline land was selected as control. Results show that wolfberry planting could decrease soil salinity, and increase BC, SOC and litter C storage of the secondary saline land significantly, especially in the first 4 years after planting. The aboveground and belowground BC storage values in the intact secondary saline land（control） accounted for only 1.0% and 1.2% of those in the wolfberry plantations, respectively. Compared to the intact secondary saline land, the SOC storage values in the 4-, 7-and 11-year-old wolfberry plantations increased by 36.4%, 37.3% and 43.3%, respectively, and the SOC storage in the wolfberry plantations occupied more than 92% of the ecosystem C storage. The average BC and SOC sequestration rates of the wolfberry plantations for the age group of 0–11 years were 0.73 and 3.30 Mg C/（hm^2·a）, respectively. There were no significant difference in BC and SOC storage between the 7-year-old and 11-year-old wolfberry plantations, which may be due in part to the large amounts of C offtakes in new branches and fruits. In Gansu Province, the C storage in the wolfberry plantations has reached up to 3.574 Tg in 2013, and the C sequestration potential of the existing wolfberry plantations was 0.134 Tg C/a. These results indicate that wolfberry planting is an ideal agricultural model to restore the degraded saline lands and increase the C sequestration capacity of agricultural lands in arid areas.展开更多
Arabinogalactan from Lycium barbarum(LBP-3)is the major biological activity component and contributes to maintaining intestinal immune homeostasis by targeting gut microbiota and their metabolites.However,it is still ...Arabinogalactan from Lycium barbarum(LBP-3)is the major biological activity component and contributes to maintaining intestinal immune homeostasis by targeting gut microbiota and their metabolites.However,it is still a big challenge to know the specific ecological microbe-metabolite interaction regulated by LBP-3 due to the host complex diet webs and lots of unidentified intestinal bacteria.Therefore,the present study constructed a defined microbial consortium,composing of symbiotic Bacteroides caccae,Phocaeicola vulgatus,B.thetaiotaomicron,B.uniformis,B.ovatus,Lactobacillus plantarum and Escherichia coli in vitro,to investigate the impact of LBP-3 on the interactions of species and their metabolites.The utilization of LBP-3 by the defined microbial consortium of 7 intestinal species was 22.5%.Full-length 16S rRNA analysis demonstrated that LBP-3 significantly modulated the composition of synthetic bacterial community,especially inhibiting the level of opportunistic pathogenic E.coli and improving the relative abundance of probiotic L.plantarum and all Bacteroidetes species except B.ovatus.LBP-3 remarkedly influenced 27 differential metabolites,mainly belong to amino acids,peptides and analogues(37.04%)and carboxylic acid and derivatives(7.41%).Moreover,targeted metabolomics revealed that the levels of acetate,propionate,tryptophan and 5-methylthioadenosine were improved by LBP-3.In addition,LBP-3 modulated the pathways of tryptophan metabolism,cysteine and methionine metabolism,and biosynthesis of siderophore group nonribosomal peptides.Notably,some amino acids(e.g.,proline and glutamate)and their related metabolic pathways(e.g.,arginine and proline metabolism)altered by LBP-3 were significantly correlated with the levels of species,such as B.uniformis,P.vulgatus,and B.thetaiotaomicron.展开更多
基金supported by the National Natural Science Foundation of China(31660232,41061030)the Carbon Benefits Project(G-4280-3)+1 种基金the Global Environmental Facility(GEF)Co-financed Project,the Foundation for Innovative Research Groups of Gansu Province(145RJIA335)the National Science and Technology Program for People's Livelihood(2013GS620202)
文摘Carbon（C） storage has received significant attention for its relevance to agricultural security and climate change. Afforestation can increase C storage in terrestrial ecosystems, and has been recognized as an important measure to offset CO_2 emissions. In order to analyze the C benefits of planting wolfberry（Lycium barbarum L.） on the secondary saline lands in arid areas, we conducted a case study on the dynamics of biomass carbon（BC） storage and soil organic carbon（SOC） storage in different-aged wolfberry plantations（4-, 7-and 11-year-old） established on a secondary saline land as well as on the influence of wolfberry plantations on C storage in the plant-soil system in an arid irrigated area（Jingtai County） of Gansu Province, China. The C sequestration and its potential in the wolfberry plantations of Gansu Province were also evaluated. An intact secondary saline land was selected as control. Results show that wolfberry planting could decrease soil salinity, and increase BC, SOC and litter C storage of the secondary saline land significantly, especially in the first 4 years after planting. The aboveground and belowground BC storage values in the intact secondary saline land（control） accounted for only 1.0% and 1.2% of those in the wolfberry plantations, respectively. Compared to the intact secondary saline land, the SOC storage values in the 4-, 7-and 11-year-old wolfberry plantations increased by 36.4%, 37.3% and 43.3%, respectively, and the SOC storage in the wolfberry plantations occupied more than 92% of the ecosystem C storage. The average BC and SOC sequestration rates of the wolfberry plantations for the age group of 0–11 years were 0.73 and 3.30 Mg C/（hm^2·a）, respectively. There were no significant difference in BC and SOC storage between the 7-year-old and 11-year-old wolfberry plantations, which may be due in part to the large amounts of C offtakes in new branches and fruits. In Gansu Province, the C storage in the wolfberry plantations has reached up to 3.574 Tg in 2013, and the C sequestration potential of the existing wolfberry plantations was 0.134 Tg C/a. These results indicate that wolfberry planting is an ideal agricultural model to restore the degraded saline lands and increase the C sequestration capacity of agricultural lands in arid areas.
基金supported by Natural Science Basic Research Program of Shaanxi(No.2024JC-YBQN-0238)Xi’an Association for Science and Technology Youth Talent Support Program(No.959202413057)+1 种基金Science and Technology Program of Xi’an(No.24NYGG0050)Shaanxi Provincial Science and Technology Key Project(No.2023-YBNY-167).
文摘Arabinogalactan from Lycium barbarum(LBP-3)is the major biological activity component and contributes to maintaining intestinal immune homeostasis by targeting gut microbiota and their metabolites.However,it is still a big challenge to know the specific ecological microbe-metabolite interaction regulated by LBP-3 due to the host complex diet webs and lots of unidentified intestinal bacteria.Therefore,the present study constructed a defined microbial consortium,composing of symbiotic Bacteroides caccae,Phocaeicola vulgatus,B.thetaiotaomicron,B.uniformis,B.ovatus,Lactobacillus plantarum and Escherichia coli in vitro,to investigate the impact of LBP-3 on the interactions of species and their metabolites.The utilization of LBP-3 by the defined microbial consortium of 7 intestinal species was 22.5%.Full-length 16S rRNA analysis demonstrated that LBP-3 significantly modulated the composition of synthetic bacterial community,especially inhibiting the level of opportunistic pathogenic E.coli and improving the relative abundance of probiotic L.plantarum and all Bacteroidetes species except B.ovatus.LBP-3 remarkedly influenced 27 differential metabolites,mainly belong to amino acids,peptides and analogues(37.04%)and carboxylic acid and derivatives(7.41%).Moreover,targeted metabolomics revealed that the levels of acetate,propionate,tryptophan and 5-methylthioadenosine were improved by LBP-3.In addition,LBP-3 modulated the pathways of tryptophan metabolism,cysteine and methionine metabolism,and biosynthesis of siderophore group nonribosomal peptides.Notably,some amino acids(e.g.,proline and glutamate)and their related metabolic pathways(e.g.,arginine and proline metabolism)altered by LBP-3 were significantly correlated with the levels of species,such as B.uniformis,P.vulgatus,and B.thetaiotaomicron.
