Initial proliferation of cortical cells in the formation of root nodules in Pisum sativum L.

Planta ◽  
1973 ◽  
Vol 114 (1) ◽  
pp. 17-28 ◽  
Author(s):  
K. R. Libbenga ◽  
P. A. A. Harkes
Keyword(s):  
Pisum Sativum ◽  
Root Nodules ◽  
Cortical Cells ◽  
Pisum Sativum L

scholarly journals The formation of symbiotic interface in root nodules of Pisum sativum L. and Medicago truncatula Gaertn

2020 ◽  
Author(s):  
A. V. Tsyganova ◽  
E. V. Seliverstova ◽  
N. J. Brewin ◽  
V. E. Tsyganov
Keyword(s):  
Pisum Sativum ◽  
Medicago Truncatula ◽  
Root Nodules ◽  
Nodule Development ◽  
Root Cells ◽  
Pisum Sativum L ◽  
Species Specific

The infection of root cells of legumes with rhizobia involves the gradual remodelling of the plant-microbial interface. General and species-specific features of symbiotic interface remodelling during nodule development were demonstrated.

A correlated light and electron microscopic study of symbiotic growth and differentiation in Pisum sativum root nodules

1976 ◽  
Vol 54 (18) ◽  
pp. 2163-2186 ◽  
Author(s):  
William Newcomb
Keyword(s):  
Electron Microscopy ◽  
Pisum Sativum ◽  
Rhizobium Leguminosarum ◽  
Root Nodules ◽  
Light And Electron Microscopy ◽  
Infection Thread ◽  
Electron Microscopic ◽  
Cortical Cells ◽  
Garden Pea ◽  
Host Cytoplasm

Plants of the garden pea Pisum sativum cv. Little Marvel were grown in aeroponic culture to facilitate observations and microscopy and were inoculated with Rhizobium leguminosarum, and nodules were sampled at five weekly intervals for light and electron microscopy. The invasion of the cortical cells by the infection thread, the structure of the infection thread, and the release of bacteria from it into the host cytoplasm and the subsequent symbiotic growth and differentiation of the two organisms are described in detail. The fine structure of the nodule is correlated with light microscopic observations and morphogenesis. A restriction in the use of the term 'vesicle' is proposed because of the current multiple and confusing usage of the term. The loss of the nodule meristem and its morphogenetic significance are discussed.

scholarly journals Identification of Cytokinins of Root Nodules of the Garden Pea, Pisum sativum L.

1976 ◽  
Vol 57 (4) ◽  
pp. 602-606 ◽  
Author(s):  
Kunihiko Syõno ◽  
John G. Torrey
Keyword(s):  
Pisum Sativum ◽  
Root Nodules ◽  
Garden Pea ◽  
Pisum Sativum L

Pisum sativum cultivar effects on hydrogen metabolism in Rhizobium

1984 ◽  
Vol 62 (8) ◽  
pp. 1682-1686 ◽  
Author(s):  
Eulogio J. Bedmar ◽  
Donald A. Phillips
Keyword(s):  
Pisum Sativum ◽  
Relative Efficiency ◽  
Rhizobium Leguminosarum ◽  
Root Nodules ◽  
Developmental Differences ◽  
The Other ◽  
Hydrogenase Activity ◽  
Uptake Hydrogenase ◽  
Hydrogen Metabolism ◽  
Pisum Sativum L

Data from 14 Pisum sativum L. cultivars establish that three pea genotypes, which were previously reported to affect net H2 evolution from root nodules in air and uptake hydrogenase activity of Rhizobium leguminosarum 128C53, are not unique. Two pea lines, 'JI1205' and 'Green Arrow,' produced very active uptake hydrogenase activity in strain 128C53, and essentially no H2 was evolved in air from root nodules capable of reducing 20 μmol C2H2 ∙ plan−1 ∙ h−1. Five other cultivars produced significantly lower uptake hydrogenase activities in the same bacterial strain and had much higher rates of net H2 evolution with similar C2H2-reduction capabilities. Parallel experiments with the same cultivars nodulated by R. leguminosarum 300, an organism with no convincing uptake hydrogenase activity in any pea line, showed that 'JI1205' and 'Green Arrow' had a significantly lower relative efficiency (RE) of N2 fixation (1 − (H2 evolved in air/C2H2 reduced)) than the other five cultivars. Developmental differences among the pea lines prevented any conclusion about the advantages or disadvantages of uptake hydrogenase activity for plant growth, but in general, cultivars with high uptake hydrogenase activity and low net H2 evolution grew more slowly than those evolving large amounts of H2.

The early morphogenesis of Glycine max and Pisum sativum root nodules

1979 ◽  
Vol 57 (23) ◽  
pp. 2603-2616 ◽  
Author(s):  
William Newcomb ◽  
David Sippell ◽  
R. L. Peterson
Keyword(s):  
Glycine Max ◽  
Pisum Sativum ◽  
Mitotic Activity ◽  
Root Nodules ◽  
Central Zone ◽  
Infected Tissue ◽  
Cortical Cells ◽  
Central Mass ◽  
Root Hair Cell ◽  
Infected Root

The development of preemergent and early emergent stages of soybean (Glycine max) and garden pea (Pisum sativum) root nodules has been studied utilizing the superior preservation and resolution obtained by noncoagulative fixatives and subsequent embedding in plastic. In both species, extensive mitotic activity and cytological changes occur in the root cortical cells while the infection thread is restricted to the infected root hair cell. In soybean the central mass of infected tissue is derived mainly from the outer layer of cortical cells whereas the inner cortical cells contribute extensively to the infected tissue of the pea nodules. The temporal and spatial patterns of mitosis differ in the nodules of the two species. Mitotic activity is restricted to a nodule meristem and occurs over a period of many weeks in pea nodules. In soybean nodules, mitotic activity occurs throughout the central zone and before decreasing, persists over a period of a few weeks. The timing and distribution of mitotic activity affects nodule morphogenesis.

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