A simple in vitro system was employed for ectomycorrhizal synthesis of Abies firma Sieb.et Zucc.with Laccaria bicolor(Maire)Orton.The aim of this present study was to study whether the symbiosis of A.firma broad occur...A simple in vitro system was employed for ectomycorrhizal synthesis of Abies firma Sieb.et Zucc.with Laccaria bicolor(Maire)Orton.The aim of this present study was to study whether the symbiosis of A.firma broad occurred with L.bicolor and whether the symbiosis of A.firma only occurred at the whole plant level.The results of the study show that the typical ectomycorrhizal structures,i.e.thick mantle and intracortical Hartig net,were observed in the lateral roots of A.firma after incubation of 10 weeks.In case of callus,three weeks following incubation,fungal hyphae were visible within the intercellular spaces of the callus cells and Hartig net-like structures were observed in transverse section.This was the first report of aseptic ectomycorrhization of A.firma seedlings,and ectomycorrhizal colonization on A.firma callus by L.bicolor.These results suggested that the callus system might be a useful tissue system for mycorrhiza synthesis in the present study.This model system may facilitate detailed studies on ectomycorrhizal development of Abies species.展开更多
<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:""><span style="font-family:Verdana;">Terra Firma-Forme Derm...<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:""><span style="font-family:Verdana;">Terra Firma-Forme Dermatosis (TFFD), a benign skin condition which presents with asymptomatic brown to black plaques which resemble dirty skin. </span><b><span style="font-family:Verdana;">Aim:</span></b><span style="font-family:Verdana;"> To document a new case presentation with TFFD in the Arab region which is considered as one of the differential diagnos</span></span><span style="font-family:Verdana;">e</span><span style="font-family:""><span style="font-family:Verdana;">s of dirty neck. </span><b><span style="font-family:Verdana;">Case presentation: </span></b><span style="font-family:Verdana;">A 15-year-old girl presented with a history of asymptomatic brownish dirt-like lesion on the nape and sides of the neck for 4-years duration, not resolved by wash with water and soap and confused with other dermatos</span></span><span style="font-family:Verdana;">e</span><span style="font-family:Verdana;">s like acanthosis nigricans or atopic dermatitis. The diagnosis of TFFD was confirmed when the lesions </span><span style="font-family:Verdana;">were </span><span style="font-family:""><span style="font-family:Verdana;">completely resolved after gentle swabbing with 70% isopropyl alcohol. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> TFFD is rarely reported in Arab region and should be considered when evaluating cases of dirty neck-like presentation of atopic dermatitis or acanthosis nigricans.展开更多
记述了蚤草（Pulicaria prostrata（Gilib.）Ascher）（菊科）、黄花羊角蒿（Incarvillea sinensin var. przewalskii（Batalin））（紫葳科）和坚硬女娄菜（Silene firmaSieb et Zucc.）（石竹科）3种植物的分布新纪录。蚤草是黄土高...记述了蚤草（Pulicaria prostrata（Gilib.）Ascher）（菊科）、黄花羊角蒿（Incarvillea sinensin var. przewalskii（Batalin））（紫葳科）和坚硬女娄菜（Silene firmaSieb et Zucc.）（石竹科）3种植物的分布新纪录。蚤草是黄土高原植物新记录,蚤草在国内分布于新疆北部和西部,在黄土高原于宁夏海原南部的月亮山首次发现。黄花羊角蒿,早记载于甘肃兰州市,后记载于宁夏罗山,调查表明广泛分布于西北部农牧交错带东部海拔1 200~2 000 m丘陵地区。坚硬女娄菜首次记录于陕北靖边、吴起、志丹的西北农牧交错带地区。展开更多
基金supported by a grant from the Bio-oriented Technology Research Advancement Institution(BRAIN)in Japan.We want to thank Dr.W.M.GILL(Tasmanian Institute of Agricultural Research,Australia)for his useful discussion.The first author was also supported by a grant from Northeast Forestry University(010-602024)when this manuscript was prepared.
文摘A simple in vitro system was employed for ectomycorrhizal synthesis of Abies firma Sieb.et Zucc.with Laccaria bicolor(Maire)Orton.The aim of this present study was to study whether the symbiosis of A.firma broad occurred with L.bicolor and whether the symbiosis of A.firma only occurred at the whole plant level.The results of the study show that the typical ectomycorrhizal structures,i.e.thick mantle and intracortical Hartig net,were observed in the lateral roots of A.firma after incubation of 10 weeks.In case of callus,three weeks following incubation,fungal hyphae were visible within the intercellular spaces of the callus cells and Hartig net-like structures were observed in transverse section.This was the first report of aseptic ectomycorrhization of A.firma seedlings,and ectomycorrhizal colonization on A.firma callus by L.bicolor.These results suggested that the callus system might be a useful tissue system for mycorrhiza synthesis in the present study.This model system may facilitate detailed studies on ectomycorrhizal development of Abies species.
文摘<b><span style="font-family:Verdana;">Background: </span></b><span style="font-family:""><span style="font-family:Verdana;">Terra Firma-Forme Dermatosis (TFFD), a benign skin condition which presents with asymptomatic brown to black plaques which resemble dirty skin. </span><b><span style="font-family:Verdana;">Aim:</span></b><span style="font-family:Verdana;"> To document a new case presentation with TFFD in the Arab region which is considered as one of the differential diagnos</span></span><span style="font-family:Verdana;">e</span><span style="font-family:""><span style="font-family:Verdana;">s of dirty neck. </span><b><span style="font-family:Verdana;">Case presentation: </span></b><span style="font-family:Verdana;">A 15-year-old girl presented with a history of asymptomatic brownish dirt-like lesion on the nape and sides of the neck for 4-years duration, not resolved by wash with water and soap and confused with other dermatos</span></span><span style="font-family:Verdana;">e</span><span style="font-family:Verdana;">s like acanthosis nigricans or atopic dermatitis. The diagnosis of TFFD was confirmed when the lesions </span><span style="font-family:Verdana;">were </span><span style="font-family:""><span style="font-family:Verdana;">completely resolved after gentle swabbing with 70% isopropyl alcohol. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> TFFD is rarely reported in Arab region and should be considered when evaluating cases of dirty neck-like presentation of atopic dermatitis or acanthosis nigricans.
