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9 results on '"Heriniaina Ramanankierana"'

1. Occurrence and diversity of stem nodulation in Aeschynomene and Sesbania legumes from wetlands of Madagascar

Author

Faustin F. Manantsoa, Marrino F. Rakotoarisoa, Clémence Chaintreuil, Adamson T. E. Razakatiana, Frédéric Gressent, Marjorie Pervent, Mickaël Bourge, Martial D. Andrianandrasana, Nico Nouwen, Herizo Randriambanona, Heriniaina Ramanankierana, and Jean-François Arrighi

Subjects
Medicine, Science
Abstract

Abstract Legumes have the ability to establish a nitrogen-fixing symbiosis with soil rhizobia that they house in specific organs, the nodules. In most rhizobium-legume interactions, nodulation occurs on the root. However, certain tropical legumes growing in wetlands possess a unique trait: the capacity to form rhizobia-harbouring nodules on the stem. Despite the originality of the stem nodulation process, its occurrence and diversity in waterlogging-tolerant legumes remains underexplored, impeding a comprehensive analysis of its genetics and biology. Here, we aimed at filling this gap by surveying stem nodulation in legume species-rich wetlands of Madagascar. Stem nodulation was readily observed in eight hydrophytic species of the legume genera, Aeschynomene and Sesbania, for which significant variations in stem nodule density and morphology was documented. Among these species, A. evenia, which is used as genetic model to study the rhizobial symbiosis, was found to be frequently stem-nodulated. Two other Aeschynomene species, A. cristata and A. uniflora, were evidenced to display a profuse stem-nodulation as occurs in S. rostrata. These findings extend our knowledge on legumes species that are endowed with stem nodulation and further indicate that A. evenia, A. cristata, A. uniflora and S. rostrata are of special interest for the study of stem nodulation. As such, these legume species represent opportunities to investigate different modalities of the nitrogen-fixing symbiosis and this knowledge could provide cues for the engineering of nitrogen-fixation in non-legume crops.

Published
2024
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2. Chapitre 24. Séchage des graines de Millettia pinnata L., Madagascar

Author

Nambinina Andry Mihajamanana, Felana Niaina Joseph Rakoto, Martial Doret Andrianandrasana, Rondro Harinisainana Baohanta, Rolland Ratsito, Faly Randriatafika, Rivo Andriamaro Rajoharison, Tsoushima E. Razakatiana, Heriniaina Ramanankierana, and Herizo Randriambanona

Published
2022

9. Effect of Rhizobium Inoculation on Growth of Common Bean in Low-Fertility Tropical Soil Amended with Phosphorus and Lime

Author

Harimenja Razafintsalama, Jean Trap, Bodovololona Rabary, Adamson Tsoushima Ernest Razakatiana, Heriniaina Ramanankierana, Lilia Rabeharisoa, Thierry Becquer, Laboratoire des RadioIsotopes (LRI), Université d'Antananarivo, Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Centre National de Recherche Appliquée au Développement Rural (FOFIFA), Centre national de recherches sur l'environnement, Centre National de Recherches sur l'Environnement, and ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010)

Subjects
common bean, [SDV.SA]Life Sciences [q-bio]/Agricultural sciences, Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, food and beverages, biological nitrogen fixation, [SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study, Management, Monitoring, Policy and Law, rhizobium, phosphorus, lime, mycorrhizal fungi, ferralsol, Madagascar
Abstract

International audience; The cultivation of grain legumes (e.g., common bean) in sub-Saharan Africa contributes to the provision of food for a growing population and delivers environmental benefits such as inputs of nitrogen (N) to crops and soil via symbiotic nitrogen fixation (SNF). However, the success of SNF is constrained by several factors such as the poor efficiency of native rhizobial strains to fix N, the low availability of phosphorus (P) and the acidity of soils. Two trials have been conducted in low-fertility tropical soils at the smallholder farm scale in Madagascar to assess the effects of Rhizobium inoculation together with inputs of P and lime on the growth of the common bean. We showed that inoculation with native strains of Rhizobium had significant effects on bean root nodulation, which was increased by up to 15-fold on plant growth, which increased by 78% and on bean yield, which increased by 126%. Moreover, we observed positive and significant relationships between inoculation with Rhizobium and P fertilization on nodulation, plant growth and yield. However, the addition of dolomite lime did not show any effect in our study. The addition of P decreased the mycorrhization rate of roots. Additional research is still needed to improve our understanding of soil fertility conditions (mainly on nutrient availability, including micronutrients) allowing better efficiency of legume symbionts (rhizobium and mycorrhiza) in such low-fertility soils.

Published
2022

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