为进一步探明陕西省榆林市樟子松人工林的土壤养分变化特征,以5年生樟子松(Pinus sylvestris L. var. mongolica Litv.)纯林和5年生樟子松-胡枝子(Lespedeza bicolor Turcz.)混交林为研究对象,分析土壤有机质、硝态氮、有效磷、速效钾...为进一步探明陕西省榆林市樟子松人工林的土壤养分变化特征,以5年生樟子松(Pinus sylvestris L. var. mongolica Litv.)纯林和5年生樟子松-胡枝子(Lespedeza bicolor Turcz.)混交林为研究对象,分析土壤有机质、硝态氮、有效磷、速效钾等理化指标以及土壤酶活性的变化特征。结果表明,樟子松纯林和樟子松-胡枝子混交林土壤有机质、有效磷和速效钾含量整体上均随着土层深度的增加呈下降趋势,全磷含量均随着土层深度的增加呈先升高后降低的趋势,硝态氮含量则均随着土壤深度的增加而增加,5个指标均表现为樟子松-胡枝子混交林高于樟子松纯林,且樟子松-胡枝子混交林各层土壤有效磷含量均显著高于樟子松纯林(P<0.05);樟子松纯林和樟子松-胡枝子混交林土壤含水率各土层间差异均不显著,樟子松-胡枝子混交林5~15 cm土层土壤含水率含量显著高于樟子松纯林(P<0.05);樟子松纯林和樟子松-胡枝子混交林土壤碱性磷酸酶活性、过氧化氢酶活性、脲酶活性均随着土层深度的增加而降低,且樟子松-胡枝子混交林过氧化氢酶活性和脲酶活性在各土层均显著高于樟子松纯林(P<0.05)。展开更多
Carotenoids and chlorophylls are among the most widely distributed pigments in nature that play essential roles in the photosynthetic apparatus and confer diverse colours in plants.Among all vegetables,cauliflower(Bra...Carotenoids and chlorophylls are among the most widely distributed pigments in nature that play essential roles in the photosynthetic apparatus and confer diverse colours in plants.Among all vegetables,cauliflower(Brassica oleracea L.ssp.var.botrytis)is rich in phytochemicals and is an important crop grown all over the world.This study investigates carotenoid and chlorophyll concentrations in differently pigmented cultivars and elucidates the role of transcriptional regulation of carotenoid accumulation including lutein andβ-carotene.Here,we characterised changes in pigments by UHPLC-DAD-ToF-MS and changes in transcript levels of carotenoid metabolic genes by qRT-PCR in florets and leaves of orange(‘Jaffa'and‘Sunset'),purple(‘Di Sicilia Violetto'and‘Graffiti'),green(‘Trevi')and white(‘Clapton')cultivars.Transcript levels of all carotenoid metabolic genes showed different transcript level patterns in the leaves and florets.Compared to the other cultivars,the orange cultivars had the highest levels ofβ-carotene in the florets and lutein in the leaves resulting in changes lutein/β-carotene ratios.In the green cultivar,higher transcript levels were also found,especially for phytoene synthase and phytoene desaturase genes of the core biosynthesis pathway.However,no increased carotenoid concentrations were observed,possibly due to a higher carotenoid turnover induced by the carotenoid cleavage dioxygenase 4 in the green cultivar.In the white(‘Clapton')and purple(‘Di Sicilia Violetto'and‘Graffiti')cultivars the phytoene desaturase transcript levels as well as carotenoid concentrations were low.Chlorophyll concentrations changed in trend comparable to the carotenoid concentrations and were only significantly lower in the leaves of the orange cultivar‘Jaffa'.Also,the chlorophyll a/b ratio changed in‘Jaffa'.In florets the highest chlorophylls concentrations were observed for the green cultivar(‘Trevi')and the purple cultivar(‘Di Sicilia Violetto').Taken together,the study demonstrates the complex source-sink relationship of carotenoid accumulation in different coloured cauliflower.展开更多
Coix seed is a dry and mature seed of Coix lacryma-jobi L.var.ma-yuen(Roman.)Stapf in the Gramineae family.Coix seed has a sweet,light taste,and a cool nature.Coix seed enters the spleen,stomach,and lung meridians.It ...Coix seed is a dry and mature seed of Coix lacryma-jobi L.var.ma-yuen(Roman.)Stapf in the Gramineae family.Coix seed has a sweet,light taste,and a cool nature.Coix seed enters the spleen,stomach,and lung meridians.It has the effects of promoting diuresis and dampness,strengthening the spleen to prevent diarrhea,removing arthralgia,expelling pus,and detoxifying and dispersing nodules.It is used for the treatment of edema,athlete's foot,poor urination,spleen deficiency and diarrhea,dampness and obstruction,lung carbuncle,intestinal carbuncle,verruca,and cancer.The medicinal and health value is high,and it has been included in the list of medicinal and food sources in China,which has a large development and application space.This article reviews the current research achievements in the processing methods and anti-tumor activities of Coix seed and provides examples of its clinical application in ancient and modern times,aiming to provide reference for further research on Coix seed and contribute to its clinical application and development.Through the analysis of the traditional Chinese patent medicines,and simple preparations and related health food of Coix seed queried by Yaozhi.com,the source,function,and dosage form of Coix seed were comprehensively analyzed,with a view of providing a reference for the development of Coix seed medicine and food.展开更多
本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,...本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,探讨新疆杨对长期盐胁迫的生理反应。主要结论为:盐胁迫下新疆杨通过选择性吸收K+,抑制过多Na+进入根系,新疆杨对盐分离子的运输选择性主要体现在根向边材的运输中,新疆杨根系对Na+具有较强的截留作用,对Cl-和SO42-也有一定截留作用。展开更多
文摘为进一步探明陕西省榆林市樟子松人工林的土壤养分变化特征,以5年生樟子松(Pinus sylvestris L. var. mongolica Litv.)纯林和5年生樟子松-胡枝子(Lespedeza bicolor Turcz.)混交林为研究对象,分析土壤有机质、硝态氮、有效磷、速效钾等理化指标以及土壤酶活性的变化特征。结果表明,樟子松纯林和樟子松-胡枝子混交林土壤有机质、有效磷和速效钾含量整体上均随着土层深度的增加呈下降趋势,全磷含量均随着土层深度的增加呈先升高后降低的趋势,硝态氮含量则均随着土壤深度的增加而增加,5个指标均表现为樟子松-胡枝子混交林高于樟子松纯林,且樟子松-胡枝子混交林各层土壤有效磷含量均显著高于樟子松纯林(P<0.05);樟子松纯林和樟子松-胡枝子混交林土壤含水率各土层间差异均不显著,樟子松-胡枝子混交林5~15 cm土层土壤含水率含量显著高于樟子松纯林(P<0.05);樟子松纯林和樟子松-胡枝子混交林土壤碱性磷酸酶活性、过氧化氢酶活性、脲酶活性均随着土层深度的增加而降低,且樟子松-胡枝子混交林过氧化氢酶活性和脲酶活性在各土层均显著高于樟子松纯林(P<0.05)。
基金supported by the Federal Office for Agriculture and Food(BLE)of Germany[Grant No.2816DOKI07(Carcauli)]。
文摘Carotenoids and chlorophylls are among the most widely distributed pigments in nature that play essential roles in the photosynthetic apparatus and confer diverse colours in plants.Among all vegetables,cauliflower(Brassica oleracea L.ssp.var.botrytis)is rich in phytochemicals and is an important crop grown all over the world.This study investigates carotenoid and chlorophyll concentrations in differently pigmented cultivars and elucidates the role of transcriptional regulation of carotenoid accumulation including lutein andβ-carotene.Here,we characterised changes in pigments by UHPLC-DAD-ToF-MS and changes in transcript levels of carotenoid metabolic genes by qRT-PCR in florets and leaves of orange(‘Jaffa'and‘Sunset'),purple(‘Di Sicilia Violetto'and‘Graffiti'),green(‘Trevi')and white(‘Clapton')cultivars.Transcript levels of all carotenoid metabolic genes showed different transcript level patterns in the leaves and florets.Compared to the other cultivars,the orange cultivars had the highest levels ofβ-carotene in the florets and lutein in the leaves resulting in changes lutein/β-carotene ratios.In the green cultivar,higher transcript levels were also found,especially for phytoene synthase and phytoene desaturase genes of the core biosynthesis pathway.However,no increased carotenoid concentrations were observed,possibly due to a higher carotenoid turnover induced by the carotenoid cleavage dioxygenase 4 in the green cultivar.In the white(‘Clapton')and purple(‘Di Sicilia Violetto'and‘Graffiti')cultivars the phytoene desaturase transcript levels as well as carotenoid concentrations were low.Chlorophyll concentrations changed in trend comparable to the carotenoid concentrations and were only significantly lower in the leaves of the orange cultivar‘Jaffa'.Also,the chlorophyll a/b ratio changed in‘Jaffa'.In florets the highest chlorophylls concentrations were observed for the green cultivar(‘Trevi')and the purple cultivar(‘Di Sicilia Violetto').Taken together,the study demonstrates the complex source-sink relationship of carotenoid accumulation in different coloured cauliflower.
基金Supported by Ningxia Natural Science Foundation,No.2022AAC02039Ningxia Key Research and Development Program,No.2023BEG02015National Natural Science Foundation of China,No.82260879.
文摘Coix seed is a dry and mature seed of Coix lacryma-jobi L.var.ma-yuen(Roman.)Stapf in the Gramineae family.Coix seed has a sweet,light taste,and a cool nature.Coix seed enters the spleen,stomach,and lung meridians.It has the effects of promoting diuresis and dampness,strengthening the spleen to prevent diarrhea,removing arthralgia,expelling pus,and detoxifying and dispersing nodules.It is used for the treatment of edema,athlete's foot,poor urination,spleen deficiency and diarrhea,dampness and obstruction,lung carbuncle,intestinal carbuncle,verruca,and cancer.The medicinal and health value is high,and it has been included in the list of medicinal and food sources in China,which has a large development and application space.This article reviews the current research achievements in the processing methods and anti-tumor activities of Coix seed and provides examples of its clinical application in ancient and modern times,aiming to provide reference for further research on Coix seed and contribute to its clinical application and development.Through the analysis of the traditional Chinese patent medicines,and simple preparations and related health food of Coix seed queried by Yaozhi.com,the source,function,and dosage form of Coix seed were comprehensively analyzed,with a view of providing a reference for the development of Coix seed medicine and food.
文摘本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,探讨新疆杨对长期盐胁迫的生理反应。主要结论为:盐胁迫下新疆杨通过选择性吸收K+,抑制过多Na+进入根系,新疆杨对盐分离子的运输选择性主要体现在根向边材的运输中,新疆杨根系对Na+具有较强的截留作用,对Cl-和SO42-也有一定截留作用。
