Experiments were conducted by using RAM Air Sampler for Use with Moving Vehicle to estimate field disease severity of wheat powdery mildew during 2002-2005. Results showed that there was significant correlation betwee...Experiments were conducted by using RAM Air Sampler for Use with Moving Vehicle to estimate field disease severity of wheat powdery mildew during 2002-2005. Results showed that there was significant correlation between field disease index and trapped spore number. Therefore, two models relating field disease index to spore number trapped were constructed using data from 2002 and 2005, or 2003 and 2004, respectively. These two models can be used to estimate field disease indexes of wheat powdery mildew in different years when disease severity is different.展开更多
采用诱集法和单孢接种培养技术,自湖北省不同棉区的棉花根际土壤中分离到能在棉花上形成VA菌根的真菌孢子和孢子果,依其显微形态特征对大部分菌株进行了种的鉴定。在已鉴定到种的6个菌株中,除Glomus mosseae(Nicol.and Gerd.)Gerd.and T...采用诱集法和单孢接种培养技术,自湖北省不同棉区的棉花根际土壤中分离到能在棉花上形成VA菌根的真菌孢子和孢子果,依其显微形态特征对大部分菌株进行了种的鉴定。在已鉴定到种的6个菌株中,除Glomus mosseae(Nicol.and Gerd.)Gerd.and Trappe和G.intraradices Schenck and Smith外,G.hoi Berch and Trappe.G.albidum Walker and Rhodes,G.ambisporum ⅡSmith and Schenck和G.geosporum(Nicol.and Gerd.)Walker4个种均为我国的新记录,其中G.albidam由于与Walker的描述不尽一致故命名为潜江变种(var.Qianjiang)。展开更多
The present article deals with the use of tree barks as a natural trap for airborne spores and pollen grains in China.The study carried out at the southern part of Beijing Botanical Garden,Institute of Botany,Chinese ...The present article deals with the use of tree barks as a natural trap for airborne spores and pollen grains in China.The study carried out at the southern part of Beijing Botanical Garden,Institute of Botany,Chinese Academy of Sciences has yielded a variety of palynomorphs mostly belonging to tree taxa.New methodologies for extraction of palynomorphs from tree barks have been suggested.Bark samples were collected from three taxa,i.e.,Paulownia fortunei Hemsl.(Scrophulariaceae),Quercus dentata Thunb.(Fagaceae),and Picea meyeri Rehder&E.H.Wilson(Pinaceae)having different bark morphologies.P.fortunei with a comparatively soft and fissured bark is believed to have a greater potential for trapping airborne spores and pollen grains compared to the stiff and less fissured barks of Q.dentata and the scaly bark of P.meyeri.Old barks yield better data in terms of quantity and quality of trapped pollen and spores.The present study throws new light on the modern pollen rain,spore-pollen dispersal,and their deposition in and aroundBeijing Botanical Garden,and other different parts of China.展开更多
文摘Experiments were conducted by using RAM Air Sampler for Use with Moving Vehicle to estimate field disease severity of wheat powdery mildew during 2002-2005. Results showed that there was significant correlation between field disease index and trapped spore number. Therefore, two models relating field disease index to spore number trapped were constructed using data from 2002 and 2005, or 2003 and 2004, respectively. These two models can be used to estimate field disease indexes of wheat powdery mildew in different years when disease severity is different.
文摘采用诱集法和单孢接种培养技术,自湖北省不同棉区的棉花根际土壤中分离到能在棉花上形成VA菌根的真菌孢子和孢子果,依其显微形态特征对大部分菌株进行了种的鉴定。在已鉴定到种的6个菌株中,除Glomus mosseae(Nicol.and Gerd.)Gerd.and Trappe和G.intraradices Schenck and Smith外,G.hoi Berch and Trappe.G.albidum Walker and Rhodes,G.ambisporum ⅡSmith and Schenck和G.geosporum(Nicol.and Gerd.)Walker4个种均为我国的新记录,其中G.albidam由于与Walker的描述不尽一致故命名为潜江变种(var.Qianjiang)。
基金supported by the National Key Basic Research Program of China (2014CB954201)the National Natural Science Foundation of China (41271222)+1 种基金the Chinese Academy of Sciences Visiting Professorship for Senior International Scientists (90004F1005)the visiting scholarship funded by China Scholarship Council (CSC)
文摘The present article deals with the use of tree barks as a natural trap for airborne spores and pollen grains in China.The study carried out at the southern part of Beijing Botanical Garden,Institute of Botany,Chinese Academy of Sciences has yielded a variety of palynomorphs mostly belonging to tree taxa.New methodologies for extraction of palynomorphs from tree barks have been suggested.Bark samples were collected from three taxa,i.e.,Paulownia fortunei Hemsl.(Scrophulariaceae),Quercus dentata Thunb.(Fagaceae),and Picea meyeri Rehder&E.H.Wilson(Pinaceae)having different bark morphologies.P.fortunei with a comparatively soft and fissured bark is believed to have a greater potential for trapping airborne spores and pollen grains compared to the stiff and less fissured barks of Q.dentata and the scaly bark of P.meyeri.Old barks yield better data in terms of quantity and quality of trapped pollen and spores.The present study throws new light on the modern pollen rain,spore-pollen dispersal,and their deposition in and aroundBeijing Botanical Garden,and other different parts of China.
