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Alleopathics studies of Vernonia polyanthes: phytochemical and metabolomic approaches

Grant number: 12/25298-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2014
Effective date (End): February 29, 2016
Field of knowledge:Agronomical Sciences - Agronomy - Plant Health
Principal Investigator:Pedro Luis da Costa Aguiar Alves
Grantee:Carita Liberato do Amaral
Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil


Different weed species presenting aggressiveness in the field, competing for resources, interfering on the crops development due to the association between competition and allelopathic compounds. Vernonia polyanthes is a cerrado's species that is widely spread by cerrados. This species is in process of recolonization under agricultural fields located on cerrado. The insertion of V. polyanthes in these fields are resulting in monetary loses by the farmers. So, the objectives of this project are: 1 - Elucidate the degree of interference imposed by Vernonia polyanthes on the germination and initial development of Glycine max and Urochloa decumbens; 2 - Investigate if the interference imposed by V. polyanthes on the crops has allelopathic contribution; 3 - Evaluate if abiotic stresses increasing the interferences of V. polyanthes on G. max and U. decumbens; 4 - Investigate how much plastic is the metabolism (metabolomic approaches) of V. polyanthes submitted by biotic and abiotic stresses. To this, we are proposing the following experiments: 1 - Study of the allelopathic potential of V. polyanthes; 2 - Contributions of the abiotic stresses on the allelopathic potential of V. polyanthes on germination and initial development of G. max and U. decumbens, 3 - Effects of decomposition of V. polyanthes leaves on germination and initial development of G. max and U. decumbens; 4 - Root exudation of V. polyanthes on germination and initial development of G. max and U. decumbens; 5 - Relative competitiveness between V. polyanthes and G. max, V. polyanthes and U. decumbens. Such studies may helpful determining the most effective strategy to control this species, causing low environmental impacts reducing the loses of production. We also believe, in the future, will be possible the use some of these identified compounds as natural herbicides.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
C.L. AMARAL; J.I. SANTOS; C.R.S. PORTUGAL; A.F. BRAGA; P.L.C.A. ALVES. GROWTH OF Vernonia ferruginea SEEDLINGS SUBMITTED TO THERMAL STRESS. Planta Daninha, v. 38, p. -, 2020. Web of Science Citations: 0.
DE SOUZA, MARCELO CLARO; DO AMARAL, CARITA LIBERATO; HABERMANN, GUSTAVO; DA COSTA AGUIAR ALVES, PEDRO LUIS; DA COSTA, FERNANDO BATISTA. Non-destructive model to estimate the leaf area of multiple Vochysiaceae species. BRAZILIAN JOURNAL OF BOTANY, v. 38, n. 4, p. 903-909, DEC 2015. Web of Science Citations: 3.

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