Torreya grandis cv.Merrillii(Taxace,Torreya)is mainly distributed across the hilly areas of subtropical China and is well known for its nutritional value.In this study,the ameliorative effects of T.grandis seed oil on...Torreya grandis cv.Merrillii(Taxace,Torreya)is mainly distributed across the hilly areas of subtropical China and is well known for its nutritional value.In this study,the ameliorative effects of T.grandis seed oil on lipid metabolism were investigated,and the underlying mechanism was explored from the perspective of gut microbiota.Mice experiments showed that the rate of body mass gain in the group where the mice were fed a high-fat diet(HFD)and supplemented with 550 mg/(kg·day)T.grandis seed oil(HFD+TO550 group)was 42.27%,while it was 62.25%in the HFD group.Compared with the HFD group,the liver and fat indices,total cholesterol,triglycerides,and low-density lipoprotein cholesterol were reduced in the oil-supplement groups.Moreover,the oil supplement significantly changed the fatty acid composition and alleviated pathological damage to the liver caused by the high-fat diet.Additionally,the distinct clustering of bacteria in the composition of gut microbiota was observed in the oil treatment group compared with that in the HFD group.T.grandis seed oil significantly increased the abundance of the beneficial bacteria and short-chain fatty acid producers,including Lactobacillus,Bifidobacterium,Faecalibaculum and Allobaculum.Our results suggest that the supplements of T.grandis seed oil could alleviate hyperlipidemia caused by HFD.These positive effects are considered to be related with sciadonic acid(SCA)and are partially mediated by alterations in gut microbiota composition and functionality.展开更多
To provide the scientific basis for establishing the efficient cultivation and management measures of Torreya grandis cv.’Merrillii’,the process of the female flower bud differentiation was studied with the paraffin...To provide the scientific basis for establishing the efficient cultivation and management measures of Torreya grandis cv.’Merrillii’,the process of the female flower bud differentiation was studied with the paraffin method.Results indicated that the ovulating strobilus differentiation of T.grandis cv.`Merrillii’ was mainly in the winter and the early spring.The ovulate strobilus formed in the middle and upper part of young tips of the mixed-bud.Their primordia appeared in early November before which there was no distinction in the dissected shape between the mixed-bud and the nutrition bud.Through the developments of bract,ovule scale,nucellus and integument,the strobilus started to blossom in the next mid-April and entered in a period of free nucleus of endosperm without formed female gametophyte and archegonium.The whole process lasted about 160 d.The illumination and themoisture in summer and autumn were main conditions to affect the female flower bud differentiation.展开更多
基金supported by the Regional Demonstration Project of Marine Economic Innovation and Development(2013 and 2016)the K.C.Wong Magna Fund offered by the Ningbo University.
文摘Torreya grandis cv.Merrillii(Taxace,Torreya)is mainly distributed across the hilly areas of subtropical China and is well known for its nutritional value.In this study,the ameliorative effects of T.grandis seed oil on lipid metabolism were investigated,and the underlying mechanism was explored from the perspective of gut microbiota.Mice experiments showed that the rate of body mass gain in the group where the mice were fed a high-fat diet(HFD)and supplemented with 550 mg/(kg·day)T.grandis seed oil(HFD+TO550 group)was 42.27%,while it was 62.25%in the HFD group.Compared with the HFD group,the liver and fat indices,total cholesterol,triglycerides,and low-density lipoprotein cholesterol were reduced in the oil-supplement groups.Moreover,the oil supplement significantly changed the fatty acid composition and alleviated pathological damage to the liver caused by the high-fat diet.Additionally,the distinct clustering of bacteria in the composition of gut microbiota was observed in the oil treatment group compared with that in the HFD group.T.grandis seed oil significantly increased the abundance of the beneficial bacteria and short-chain fatty acid producers,including Lactobacillus,Bifidobacterium,Faecalibaculum and Allobaculum.Our results suggest that the supplements of T.grandis seed oil could alleviate hyperlipidemia caused by HFD.These positive effects are considered to be related with sciadonic acid(SCA)and are partially mediated by alterations in gut microbiota composition and functionality.
文摘To provide the scientific basis for establishing the efficient cultivation and management measures of Torreya grandis cv.’Merrillii’,the process of the female flower bud differentiation was studied with the paraffin method.Results indicated that the ovulating strobilus differentiation of T.grandis cv.`Merrillii’ was mainly in the winter and the early spring.The ovulate strobilus formed in the middle and upper part of young tips of the mixed-bud.Their primordia appeared in early November before which there was no distinction in the dissected shape between the mixed-bud and the nutrition bud.Through the developments of bract,ovule scale,nucellus and integument,the strobilus started to blossom in the next mid-April and entered in a period of free nucleus of endosperm without formed female gametophyte and archegonium.The whole process lasted about 160 d.The illumination and themoisture in summer and autumn were main conditions to affect the female flower bud differentiation.
