Occurrence of nodulation in unexplored leguminous trees native to the West African tropical rainforest and inoculation response of native species useful in reforestation

Abstract

Summary• Despite the abundance and diversity of timber tree legumes in the West African rainforest, their ability to form nitrogen-fixing nodules in symbiosis with rhizobia, and their response to rhizobial inoculation, remain poorly documented.• In the first part of this study the occurrence of nodulation was determined in 156 leguminous species growing in six natural forest areas in Guinea, mostly mature trees. In the second part, an in situ experiment of rhizobial inoculation was performed on eight selected tree species belonging to three genera: Albizia, Erythrophleum and Millettia .• Of the 97 plant species and 14 genera that had never been examined before this study, 31 species and four genera were reported to be nodulated. After 4 months of growing in a nursery and a further 11 months after transplantation of plants to the field, we observed a highly significant ( P < 0.001) and positive effect of inoculation with Bradyrhizobium sp. strains on the growth of the eight tree species tested.• The importance of determining the nodulation ability of unexplored local trees and subsequently using this information for inoculation in reforestation programmes was demonstrated.

Nodulation of native woody legumes in Hong Kong, China

“…Since the first global review of nodulation in legumes by Allen and Allen (1981), a few surveys carried out in the Amazon region added nearly 200 nodulating legumes to the list (de Faria et al 1984;de Faria and de Lima 1998;De Souza Moreira et al 1992). Another 97 new records (although several reports were doubtful) were reported in a study in West African tropical rainforest (Diabate et al 2005). Sutherland and Sprent (1993) estimated that less than 20% of the Leguminosae species have been studied for nodulation.…”

Efeito da fertilização fosfatada na produção de raízes, liteira e nodulação de Mimosa caesalpiniifolia benth

“…A presença ou ausência de nódulos não foi afetada pela adubação fosfatada, com a variabilidade, apesar de alta, sendo relativamente comum em trabalhos de levantamento de nodulação em espécies arbóreas no campo (DULORMNE et AL., 2003;WOLDE-MESKEL et AL., 2004;DIABATE et AL., 2005;GROSSMAN et AL., 2006, entre outros). O processo de nodulação em leguminosas em viveiros no Sul de Minas Gerais (BARBERI et., 1998) apontou que ausência de nodulação pode estar relacionada a fatores químicos do solo (acidez, deficiência de P, Mo, Co etc.…”

The Response of Bambara Groundnut (Vigna Subterranea (L.)Verdc). To Phosphate Fertilizer Levels In Igbariam South East Nigeria.

“…Hence neglected and under utilized. But this is a crop ranked in important grain legumes after cowpea and groundnut (Diabate et al;. In Igbariam South East Nigeria, very little or no data is available on Bambara groundnut on growth yield potential and nutrient requirement.…”