Observations on the fine structure of the root nodule endophyte of Hippophaë rhamnoides L.

  title={Observations on the fine structure of the root nodule endophyte of Hippopha{\"e} rhamnoides L.},
  author={Elliott S. M. Gatner and Isobel C. Gardner},
  journal={Archiv f{\"u}r Mikrobiologie},
SummaryElectron microscopy of ultra-thin sections of Hippophaë rhamnoides root nodules has been carried out in order to elucidate the nature of the endophyte. The organism is seen as a branching, septate filament approximately 0.6 microns in diameter bearing on its terminal ends spherical sub-divided vesicles 3–4 microns in diameter. In the mature nodule the vesicles are the most prominent endophyte form and appear to be formed by swelling of the hyphal tips. It is concluded that the endophyte… 
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The formation of vesicles in the developmental cycle of the nodular endophyte of Hippophaë rhamnoides L.

SummaryThe mature vesicle of the Hippophaë rhamnoides root nodule endophyte is spherical, approximately 3–4 μm in diameter and exhibits a high degree of apparently random septation. Electron

Fine structure of actinorhiza of theRhamnaceae growing in Chile I.Talguenea quinquenervia (Gill et Hook)

Talguenea quinquenervia Gill et Hook (Rhamnaceae) are restricted to the middle region of the root cortex and the root endophyte possesses hyphae which are septate and vesicles.

Cell and endophyte structure of the nitrogen-fixing root nodules ofCeanothus integerrimus H. and A.

The nitrogen fixing root nodules ofeanothus integerrimus were very similar in appearance to other non-legume nodules, but the infected cells had apparently normal nuclei, chloroplasts and mitochondria and were probably alive, except at the base of the nodule where both infected cells and the endophyte they contained were dead.

Cell and endophyte structure of the nitrogen-fixing root nodules ofCeanothus integerrimus H.and A.

SummaryThe root nodules ofCeanothus integerrimus were perennial, and after one year they were tightly packed masses of small lobes. Each lobe was root-like in organization and was produced by an

Absence of “void area” in freeze-etched vesicles of the Alnus crispa var. mollis Fern. root nodule endophyte

Nitrogen-fixing root nodules of Alnus crispa var. mollis Fern. were studied by transmission electron microscopy and by freeze-etching technique. Ultrathin sectioning of septate vesicles of the

A Comparative Study of 5S rDNA Non-Transcribed Spacers in Elaeagnaceae Species

5S rDNA is organized as a cluster of tandemly repeated monomers that consist of the conservative 120 bp coding part and non-transcribed spacers with different lengths and sequences among different species, which may be useful for the development of species-specific DNA markers in this family.



Observations on the fine structure of the endophyte of the root nodules of alnus glutinosa (L.) gaertn.

It would appear that the different forms of the organism are associated with different seasons of the year and with different metabolic patterns, of particular interest in this connection is the fixation of nitrogen which is associated with the nodule symbiosis.


Electron microscopy of 0.1-mu thick sections of root nodules, fixed with permanganate and embedded with methacrylate, showed that infected plant cells were filled with a mycelial endophyte.

A reinvestigation of the root-nodules of species of Elaeagnus, Hippophae, Alnus and Myrica, with special reference to the morphology and life histories of the causative organisms.

SUMMARY: Root-nodules of Elaeagnus spp., Hippophae rhamnoides, Alnus glutinosa and Myrica gale are modified lateral roots. The enlarged cortical cells of an actively growing nodule contain the

Electron microscopy of the endophyte ofAlnus glutinosa

According to the cytology of the hyphae, the endophyte is an actinomycete, and its plasmalemmosomes, or membranous bodies connected with the cytoplasmic membrane, are beautifully developed.

The development and function of the root nodules ofAlnus, Myrica andHippophaë

The comparative treatment of the three nodulated genera represented in Europe will be based partly on new observations and partly on data already published by the authors in respect of individual species, and will not be specifically considered.

THE FINE STRUCTURE OF Streptomyces coelicolor II. The Nuclear Material

Colonies and spore suspensions of Streptomyces coelicolor were fixed for electron microscopy and in thin sections the nuclear regions have a lower average density than the cytoplasm and the outlines of these regions correspond well with the profiles of the chromatinic bodies observed with the light microscope.

A Membranous Component of the Cytoplasm in Streptomyces coelicolor

Improved fixation of the actinomycete Streptomyces coelicolor by the method of Kellenberger, Ryter, and S6chaud has revealed an unusually complex organisation of the fine structure of a bacterium, with an extensive membranous component in the cytoplasm.

Nitrogen Fixation in Non-Legume Root Nodule Plants

It has been shown that fixation of atmospheric nitrogen is associated with nodule-bearing plants of alder, bog myrtle and sea buckthorn, enabling the plants to grow in a rooting medium free of combined nitrogen just as in the case of legumes.

Nodulation and nitrogen-fixation byHippophaë rhamnoides L. in the field

The extent of nodulation and nitrogen fixation by a population of Hippophaë rhamnoides bushes occurring on a sand dune system on the east coast of England has been studied and it seems unlikely that combined nitrogen should markedly inhibit fixation in this situation.

An Isotopic Study of the Fixation of Nitrogen associated with Nodulated Plants of Alnus, Myrica, and Hippophaë

Nodulated plants of Alnus glutinosa, Myrica gale, and Hippophae rhamnoides, the root systems of which had been exposed to excess free 15N, showed substantial enrichment in fixed 15N content in all parts of the plant, but particularly in the root nodules, supporting the conclusion already drawn that the nodules of these non-legumes are similar to those of legumes in their function and relation to the rest of the plants.