Artigo
Mineral nitrogen associated changes in growth and Xylem-N compounds in amazonian legume tree
Registro en:
Journal Of Plant Nutrition. Philadelphia: Taylor &francis Inc, v. 38, n. 4, p. 584-595, 2015.
0190-4167
10.1080/01904167.2014.957389
WOS:000349997900008
2721709345785473
Autor
Omena-Garcia, Rebeca Patricia
Justino, Gilberto Costa
Ferreira de Araujo, Vanderlei Borboni
Gomes de Souza, Luiz Augusto
Camargos, Liliane Santos de [UNESP]
Carvalho Goncalves, Jose Francisco de
Resumen
In nodulated young Inga edulis plants, nodule and plant growth, nitrogen (N) in xylem sap and tissues total contents of amino acid, ureide, and nitrate were determined in response to nutrition with nitrate, ammonium, or no mineral N. Additionally, the amount of soluble sugars in the different plant tissues was quantified. It was found that mineral N improved plant growth in height and diameter especially with ammonium. However, nitrate dramatically reduced nodule dry weight on a root dry weight basis and impaired N organic transport by xylem sap. Additionally, a higher amount of amino acids was observed in the roots and nodules of plants fed with mineral N but sugar levels remained constant. Although nitrate inhibited symbiosis, data support the idea that I. edulis is able to use both molecular and mineral nitrogen during the life cycle. National Institute of Amazonian Research (MCTINPA) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Instituto Nacional de Pesquisas da Amazônia (INPA), Plant Physiol & Biochem Laboratory, BR-69011970 Manaus, AM, Brasil Universidade Estadual Paulista (UNESP), Faculdade de Engenharia (FEIS), Departamento de Biologia e Zootecnia, Ilha Solteira, SP, Brasil Universidade Estadual Paulista (UNESP), Faculdade de Engenharia (FEIS), Departamento de Biologia e Zootecnia, Ilha Solteira, SP, Brasil