Scanning Electron Microscopy of Rhizobium trifolii Infection Sites on Root Hairs of White Clover
نویسندگان
چکیده
منابع مشابه
Ultrastructure of Rhizobium-induced infection threads in clover root hairs.
Ultrastructural studies of Rhizobium-induced infection threads in clover root hairs show that the infection thread is initiated by an invagination process. Root hair wall growth is redirected at a localized point, resulting in the formation of an open pore. There is no direct penetration through the wall, and the bacteria remain extracellular within the root hair.
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چکیده ندارد.
15 صفحه اولRegulation by fixed nitrogen of host-symbiont recognition in the Rhizobium-clover symbiosis.
Either NO(3) (-) (16 millimolar) or NH(4) (+) (1 millimolar) completely inhibited infection and nodulation of white clover seedlings (Trifoliin repens) inoculated with Rhizobium trifolii. The binding of R. trifolii to root hairs and the immunologically detectable levels of the plant lectin, trifoliin, on the root hair surface had parallel declining slopes as the concentration of either NO(3) (-...
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Mutant strains of Rhizobium trifolii that induce nitrogenase activity in the free-living state were isolated. These strains, unlike the wild type, nodulated soybean and mungbean plants, producing effective nodules. One of the strains, strain DT72, also nodulated clover but the nodules were ineffective. Strain DT125 consumed hydrogen gas from the gas phase, which can be coupled to nitrogenase ac...
متن کاملUltrastructure of Rhizobium-Induced Infection Threads in Clover Root Hairs1
The first stage in the establishment of the Rhizobium-legume symbiosis is the infection of the root of the host legume by the appropriate Rhizobium species. A recent and complete review of the infection process has been given by Dart (1). In the clover symbiosis, infective strains of Rhizobium trifolii enter the host through root hairs. A characteristic deformation is curling at the root hair t...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1980
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.40.6.1094-1099.1980