Stem Nodules Morphology of Discolobium leptophyllum

Martins, Claudia Miranda; Loureiro, M. F.; Souto, Sebastião Manhães; Franco, A. A.

doi:10.1007/0-306-47615-0_317

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“…, 1994). This is also the case with D. leptophyllum , whose stem nodules are largely identical to those on D. pulchellum (Martins et al. , 2000; data not shown).…”

Section: Resultssupporting

confidence: 56%

“…Although Discolobium nodules are basically aeschynomenoid ( Fig. 5a), they differ from Aeschynomene nodules in a number of features, both structural and physiological (Loureiro et al, 1994;Martins et al, 2000). The most notable difference is that the stem nodules (but not the root nodules) on D. pulchellum senesce rapidly (within 24 h) upon exposure to air, suggesting that they are specifically adapted to permanent submergence/inundation (Loureiro et al, 1994).…”

Section: Resultsmentioning

confidence: 99%

“…5a), they differ from Aeschynomene nodules in a number of features, both structural and physiological (Loureiro et al. , 1994; Martins et al. , 2000).…”

Section: Resultsmentioning

confidence: 99%

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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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“…, 1994). This is also the case with D. leptophyllum , whose stem nodules are largely identical to those on D. pulchellum (Martins et al. , 2000; data not shown).…”

Section: Resultssupporting

confidence: 56%