独角莲水溶性成分研究

利用硅胶、sephadex LH-20、反相柱层析和制备液相等方法对独角莲水溶性成分进行研究,分离得到4个化合物,其结构经波谱方法和标准品对照鉴定为5-羟甲基糠醛(5-hydroxymethyl-2-furaldehyde)(1),腺苷(adenosine)(2),甘露醇(mannitol)(3)和核糖醇(ribitol)(4)。这些化合物均首次在独角莲化学成分研究中报道。     

松茸的化学成分及其药理作用的研究进展

综述了松茸(Tricholoma matdutake Sing.)的分布、化学成分以及药理作用。     

蒙古口蘑驯化栽培成功

在观察研究蒙古口蘑生态的基础上,通过菌种分离、驯化,选出87-B-2优良菌株。在以马粪、麦秸等配制的发酵料进行瓶栽、箱栽试验的基础上,1990年用床式栽培方法驯化栽培成功蒙古口蘑。     

Rejuvenation of a 100-year-old Sequoiadendron giganteum through in vitro meristem culture. II. Biochemical arguments

The phenomena of phase change and rejuvenation are characterized mainly by morphological and physiological criteria. Thus far, biochemical assessments have been relatively limited. In Sequoiadendron giganteum , techniques of sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and miniaturized two-dimensional gel electrophoresis were applied to a meristem-derived line from a 100-year-old tree to attest the basic origin of the resulting rejuvenation observed from morphological and organogenic standpoints in vitro as well as after acclimation in outdoor conditions. The membrane-associated protein J16, which characterizes the juvenile status was detected in both the juvenile control and the rejuvenated line, while in the original mature form it was totally lacking. In addition, two-dimensional electrophoretic analysis of protein patterns of single meristems belonging to the mature and the rejuvenated form suggested that rejuvenation might involve a drastic modification of the protein content within the meristem itself.     

Biomechanics and functional anatomy of hollow-stemmed sphenopsids. I. Equisetum giganteum (Equisetaceae)

The hollow stem of Equisetum giganteum owes its mechanical stability to an outer ring of strengthening tissue, which provides stiffness and strength in the longitudinal direction, but also to an inner lining of turgid parenchyma, which lends resistance to local buckling. With a height >2.5 m isolated stems are mechanically unstable. However, in dense stands individual stems support each other by interlacing with their side branches, the typical growth habit of semi-self-supporters.     

Reflection of inside mycorrhizal status in the coloration of mycelial blocks ofTricholoma bakamatsutake

The coloration of mycelial blocks ofTricholoma bakamatsutake was examined in conspicuous colonies of the fungus in the field. Grayish white and gray mycelial blocks contained higher percentages of sounder stages of mycorrhizas and of root tips with attached mycelia of this fungus than dark gray and black ones. The percentage of sounder stages was higher between July and December than in the other months in grayish white mycelial blocks. A survey over time of the grayish white mycelial blocks at 113 points revealed that one point maintained gray after 77 mo.     

THE EFFECTS OF LAGENIDIUM GIGANTEUM ON AEDES ALBOPICTUS AND OTHER MOSQUITOES IN GUIZHOU, CHINA

Abstract  The mosquito fungal pathogen, Lagenidium giganteum , was used to kill mosquito larvae of Guizhou. China, in the laboratory. The infection rates in Aeds albopictus ranged 25–89%, while those in Culex quingue fasciatus 90–100%. Five additional species and one genus of mosquitoes were added to the host list of L. giganteum .