Root-knot nematodes（RKNs,Meloidogyne spp.） are obligate biotrophic parasites that settle close to the vascular tissues in plant roots.The diseases resulting from RKN infections cause serious damage to agricultural p...Root-knot nematodes（RKNs,Meloidogyne spp.） are obligate biotrophic parasites that settle close to the vascular tissues in plant roots.The diseases resulting from RKN infections cause serious damage to agricultural production worldwide.In the present paper,the resistance of Chinese leek（Allium tuberosum Rottler ex Sprengel） against RKNs,its suppressive effect on nematode disease,its nematicidal activity and its component profile were studied to identify an efficient disease control method.In soil heavily infected by nematodes,Chinese leek showed strong resistance to RKNs.Additionally,the gall indexes of cucumber plants rotated with Chinese leek and of tomato plants intercropped with Chinese leek were reduced by 70.2 and 41.1%,respectively.In a pot experiment,the gall indexes of Chinese leek extract-treated tomato and cucumber plants were reduced by 88.9 and 75.9%,respectively.In an in vitro experiment,the mortality rate of a RKN（Meloidogyne incognita J2） treated with Chinese leek extract was significantly higher than that of the control.The gas chromatography-mass spectrometry（GC-MS） analysis revealed that glycosides,carboxylic acids,ketones and organic sulfides are the main components in the Chinese leek extract.This study revealed that Chinese leek possesses a high resistance to RKNs,has strong nematicidal activity against M.incognita and can significantly reduce the incidence of disease caused by nematodes.展开更多
[Objectives]To investigate the molecular mechanism of gene differential expression in A.tuberosum under Botrytis cinerea stress.[Methods]The leaf of A.tuberosum was inoculated with B.cinerea to induce resistance,then ...[Objectives]To investigate the molecular mechanism of gene differential expression in A.tuberosum under Botrytis cinerea stress.[Methods]The leaf of A.tuberosum was inoculated with B.cinerea to induce resistance,then leaf samples were taken at 2,4,8,12 and 24 h,respectively,after inoculation,and used for cDNA-SCoT analysis to detect the gene differential expressions.[Results]More than 800 bands with length of 100-1800 bp were obtained using 60 SCoT primers.A total of 40 differentially expressed EST sequences were screened out,and 18 non-redundant ESTs with high quality were obtained by cluster analyses of the ESTs sequencing.The results of BlastN showed that the differential genes of A.tuberosum mainly related to disease defense,signal transduction,and protein metabolism.[Conclusions]Further analysis of gene function indicated that brassinosteroid biosynthesis-like proteins,NBS-LRR type disease resistance protein,jasmonic acid induced protein,abscisic stress ripening protein may be involved in the process of the incompatible interaction between the A.tuberosum and B.cinerea.展开更多
Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effect...Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effects,which result in low yield and poor quality.This paper analyzed effects of PEG6000 concentration on budding percentage in detail.It comes to conclusions that budding percentage of No.1 seed increases from 71% to 92% on the basis of 36 h treatment by 20% PEG6000 and 24 h water-drying,that of No.3 seed ranges from 30.4% to 53.4% on the basis of the same treatment by 10% PEG6000.展开更多
Objective:This study tests whether long-term intake of Allium tuberosum(AT)can alleviate pulmonary inflammation in ovalbumin(OVA)-induced asthmatic mice and evaluates its effect on the intestinal microbiota and innate...Objective:This study tests whether long-term intake of Allium tuberosum(AT)can alleviate pulmonary inflammation in ovalbumin(OVA)-induced asthmatic mice and evaluates its effect on the intestinal microbiota and innate lymphoid cells(ILCs).Methods:BALB/c mice were divided into three groups:phosphate buffer saline,OVA and OVA+AT.The asthmatic murine model was established by sensitization and challenge of OVA in the OVA and OVA+AT groups.AT was given to the OVA+AT group by oral gavage from day 0 to day 27.On day 28,mice were sacrificed.Histopathological evaluation of lung tissue was performed using hematoxylin and eosin,and periodic acid-Schiff staining.The levels of IgE in serum,interleukin-5(IL-5)and IL-13 from bronchoalveolar lavage fluid(BALF)were measured by enzyme-linked immunosorbent assay.The ILCs from the lung and gut were detected by flow cytometry.16 S ribosomal DNA sequencing was used to analyze the differences in colon microbiota among treatment groups.Results:We found that long-term intake of AT decreased the number of inflammatory cells from BALF,reduced the levels of IL-5 and IL-13 in BALF,and IgE level in serum,and rescued pulmonary histopathology with less mucus secretion in asthmatic mice.16 S ribosomal DNA sequencing results showed that AT strongly affected the colonic bacteria community structure in asthmatic mice,although it had no significant effect on the abundance and diversity of the microbiota.Ruminococcaceae and Desulfovibrionaceae were identified as two biomarkers of the treatment effect of AT.Moreover,AT decreased the numbers of ILCs in both the lung and gut of asthmatic mice.Conclusion:The results indicate that AT inhibits pulmonary inflammation,possibly by impeding the activation of ILCs and adjusting the homeostasis of gut microbiota in asthmatic mice.展开更多
建立了韭菜中三唑酮和腐霉利同时测定的气相色谱-串联质谱（gas chromatographytandem mass spectrometry,GC-MS/MS）分析方法。样品匀浆后用乙腈提取,经盐析和利用石墨化碳黑/氨基混合型固相萃取柱进行净化,经GC-MS/MS检测,外标法定量...建立了韭菜中三唑酮和腐霉利同时测定的气相色谱-串联质谱（gas chromatographytandem mass spectrometry,GC-MS/MS）分析方法。样品匀浆后用乙腈提取,经盐析和利用石墨化碳黑/氨基混合型固相萃取柱进行净化,经GC-MS/MS检测,外标法定量。结果表明：在0.01～0.5 mg/kg添加水平下,三唑酮和腐霉利回收率在84%～98%之间,相对标准偏差在2.0%～7.3%（n=5）之间;三唑酮和腐霉利的定量限分别为0.005和0.001 mg/kg,可满足韭菜中三唑酮和腐霉利残留检测的要求。展开更多
基金supported by the National Natural Science Foundation of China(31272151,31471864)the Agro-scientific Research in the Public Interest,China(201103018)the China Agriculture Research System(CARS-25)
文摘Root-knot nematodes（RKNs,Meloidogyne spp.） are obligate biotrophic parasites that settle close to the vascular tissues in plant roots.The diseases resulting from RKN infections cause serious damage to agricultural production worldwide.In the present paper,the resistance of Chinese leek（Allium tuberosum Rottler ex Sprengel） against RKNs,its suppressive effect on nematode disease,its nematicidal activity and its component profile were studied to identify an efficient disease control method.In soil heavily infected by nematodes,Chinese leek showed strong resistance to RKNs.Additionally,the gall indexes of cucumber plants rotated with Chinese leek and of tomato plants intercropped with Chinese leek were reduced by 70.2 and 41.1%,respectively.In a pot experiment,the gall indexes of Chinese leek extract-treated tomato and cucumber plants were reduced by 88.9 and 75.9%,respectively.In an in vitro experiment,the mortality rate of a RKN（Meloidogyne incognita J2） treated with Chinese leek extract was significantly higher than that of the control.The gas chromatography-mass spectrometry（GC-MS） analysis revealed that glycosides,carboxylic acids,ketones and organic sulfides are the main components in the Chinese leek extract.This study revealed that Chinese leek possesses a high resistance to RKNs,has strong nematicidal activity against M.incognita and can significantly reduce the incidence of disease caused by nematodes.
基金Supported by Key Scientific Research Projects of Colleges and Universities in Henan Province(21B210007).
文摘[Objectives]To investigate the molecular mechanism of gene differential expression in A.tuberosum under Botrytis cinerea stress.[Methods]The leaf of A.tuberosum was inoculated with B.cinerea to induce resistance,then leaf samples were taken at 2,4,8,12 and 24 h,respectively,after inoculation,and used for cDNA-SCoT analysis to detect the gene differential expressions.[Results]More than 800 bands with length of 100-1800 bp were obtained using 60 SCoT primers.A total of 40 differentially expressed EST sequences were screened out,and 18 non-redundant ESTs with high quality were obtained by cluster analyses of the ESTs sequencing.The results of BlastN showed that the differential genes of A.tuberosum mainly related to disease defense,signal transduction,and protein metabolism.[Conclusions]Further analysis of gene function indicated that brassinosteroid biosynthesis-like proteins,NBS-LRR type disease resistance protein,jasmonic acid induced protein,abscisic stress ripening protein may be involved in the process of the incompatible interaction between the A.tuberosum and B.cinerea.
文摘Allium tuberosum Roxb is very popular for its function of stomach-strengthening,spirit-freshening,yang-warming and kidney essencereplenishing,however,its seeds appear to low bud,irregular sapling and other side effects,which result in low yield and poor quality.This paper analyzed effects of PEG6000 concentration on budding percentage in detail.It comes to conclusions that budding percentage of No.1 seed increases from 71% to 92% on the basis of 36 h treatment by 20% PEG6000 and 24 h water-drying,that of No.3 seed ranges from 30.4% to 53.4% on the basis of the same treatment by 10% PEG6000.
基金supported by the National Natural Science Foundation of China(No.81473656)Fundamental Research Funds for Central Universities(No.2019-JYB-TD014)。
文摘Objective:This study tests whether long-term intake of Allium tuberosum(AT)can alleviate pulmonary inflammation in ovalbumin(OVA)-induced asthmatic mice and evaluates its effect on the intestinal microbiota and innate lymphoid cells(ILCs).Methods:BALB/c mice were divided into three groups:phosphate buffer saline,OVA and OVA+AT.The asthmatic murine model was established by sensitization and challenge of OVA in the OVA and OVA+AT groups.AT was given to the OVA+AT group by oral gavage from day 0 to day 27.On day 28,mice were sacrificed.Histopathological evaluation of lung tissue was performed using hematoxylin and eosin,and periodic acid-Schiff staining.The levels of IgE in serum,interleukin-5(IL-5)and IL-13 from bronchoalveolar lavage fluid(BALF)were measured by enzyme-linked immunosorbent assay.The ILCs from the lung and gut were detected by flow cytometry.16 S ribosomal DNA sequencing was used to analyze the differences in colon microbiota among treatment groups.Results:We found that long-term intake of AT decreased the number of inflammatory cells from BALF,reduced the levels of IL-5 and IL-13 in BALF,and IgE level in serum,and rescued pulmonary histopathology with less mucus secretion in asthmatic mice.16 S ribosomal DNA sequencing results showed that AT strongly affected the colonic bacteria community structure in asthmatic mice,although it had no significant effect on the abundance and diversity of the microbiota.Ruminococcaceae and Desulfovibrionaceae were identified as two biomarkers of the treatment effect of AT.Moreover,AT decreased the numbers of ILCs in both the lung and gut of asthmatic mice.Conclusion:The results indicate that AT inhibits pulmonary inflammation,possibly by impeding the activation of ILCs and adjusting the homeostasis of gut microbiota in asthmatic mice.
