Morphological Development of Nodules on Sesbania Grandiflora Poir., With Reference to the Origin of Nodule Rootlets

Harris, John O.; Allen, Ethel K.; Allen, O. N.

doi:10.1002/j.1537-2197.1949.tb05318.x

Cited by 16 publications

(14 citation statements)

References 15 publications

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“…, 1996, 1998). Except for their close proximity to the stem, in all other respects S. exasperata root nodules were similar to those observed on other Sesbania species (Harris et al. , 1949; Brown & Walsh, 1994; Ndoye et al.…”

Section: Resultssupporting

confidence: 79%

“…Moreover, although they appeared green the nodules did not contain the chloroplasts (data not shown) that are such a significant feature of stem nodules on S. rostrata (Dreyfus & Dommergues, 1981;Duhoux, 1984;James et al, 1996James et al, , 1998. Except for their close proximity to the stem, in all other respects S. exasperata root nodules were similar to those observed on other Sesbania species (Harris et al, 1949;Brown & Walsh, 1994;Ndoye et al, 1994;Rana & Krishnan, 1995), being essentially spherical in shape but with a meristematic region at the tip, and with a cortex containing a layer of sclereids and tannin-containing cells (Fig. 5e).…”

Section: Resultsmentioning

confidence: 64%

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Flooding‐tolerant legume symbioses from the Brazilian Pantanal

et al. 2001

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Summary• Nodulated legumes in some of the flooded and seasonally flooded areas of the Pantanal Mato-Grossense wetlands in Brazil are described here.• In the permanently flooded lakes (baias) of the Caracara national park Discolobium pulchellum , Mimosa pellita , Sesbania exasperata and Vigna lasiocarpa (syn. Phaseolus pilosus ) were the most abundant, whereas close to Corumbá, at the edges of the river Paraguai, Neptunia spp. were also common. Adaptations that allow these legumes to fix N 2 in a flooded environment included a floating growth habit, aerenchyma and nodulated adventitious roots.• By contrast, Aeschynomene spp. ( A. ciliata , A. denticulata , A. fluminensis , and A. sensitiva ) were the dominant nodulated legumes in the seasonally flooded pastures of Nhumirim.• Stem-nodulation was commonly observed, particularly on seasonally flooded Aeschynomene and seasonal/permanently flooded Discolobium spp., but also, in a modified form, on floating stems of V. lasiocarpa . The structures of stem and/or root nodules on Aeschynomene spp., Discolobium leptophyllum and V. lasiocarpa are described in detail, and nodulation by D. leptophyllum and Neptunia pubescens is reported for the first time.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 64%

Flooding‐tolerant legume symbioses from the Brazilian Pantanal

et al. 2001

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“…Certain tropical tree and shrub legumes are exceptional in possessing perennial nodules which exhibit continued growth activity in the form of annual or seasonal increments of bacterial tissue. Such lobed nodules have been described for the genera Sophora and Acacia (Spratt 1919), Wistaria (Jimbo 1927), Sesbania (Harris, Allen, and Allen 1949), and Oaragana (Allen, Gregory, and Allen 1955). The above authors associate various anatomical features of the perennial nodule with its prolonged symbiotic activity.…”

Section: Introductionmentioning

confidence: 93%

Nodulation Studies in Legumes II. The Influence of Various Environmental Factors on Symbiotic Expression in the Vetch (Vioia Sativa l.) And Other Legumes

Pate¹

1958

Aust. Jnl. Of Bio. Sci.

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The major sequences of symbiosis in field�grown vetch plants (Vicia sativa L.) are similar to those described in Part I of this series (Pate i958) for the field pea (Pisum arvense L.). In both species symbiotic development is found to be charac� teristically synchronized with host plant leaf production and nitrogen accumulation. A generalized scheme for the symbiosis and nitrogen economy of the annual legume is derived from nodulation studies carried out in Australia and Northern Ireland.

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“…In tap roots of soybean the threads penetrate only the first 5 or 6 cell layers of the thick cortical parenchyma; in lateral roots, where cell resistance is less, penetration proceeds at a greater rate and persists inwardly to the pericycle layer (40). In the formation of exogenous nodules proof is lacking that infection threads penetrate the endodermis or pericycle of the root stele (40,45,128,229,332,412). Schaede (306) has verified the tubular structure of the micellae of the threads by polarized light.…”

Section: Rhizobia As Infecting Agentsmentioning

confidence: 99%

“…During early stages of infection in alfalfa the growing tips of the thread consist of a slime-like matrix; eventually, the entire thread is enclosed in a sheath (332). The conspicuous funnel-shaped patterns of threads at their junctures with the host cell walls are attributed to expansion of the latter during hypertrophy (230), shrinkage of the zoogloeal mass (332), and, also, to an accumulation of rhizobia at these sites resulting from delayed passage through the walls (128). No evidence exists that the threads per se cross the wall barriers.…”

Section: Rhizobia As Infecting Agentsmentioning

confidence: 99%