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Self/non-self reference capacity in the interaction dynamic among Eucalyptus urophylla seedlings under different environmental conditions

Grant number: 11/21591-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2012
Effective date (End): July 31, 2015
Field of knowledge:Biological Sciences - Botany - Pant Physiology
Principal Investigator:Gustavo Maia Souza
Grantee:Suzana Chiari Bertolli
Home Institution: Pró-Reitoria de Pesquisa e Pós-Graduação. Universidade do Oeste Paulista (UNOESTE). Presidente Prudente , SP, Brazil

Abstract

The identification of foraging strategies of the roots has been helpful for understanding the interspecific variation in responses to environmental heterogeneity, and to make predictions about the roles of these responses in the formation of plant communities. There are many evidences that the presence of neighboring plants significantly influences the response of roots and they are capable of self / non-self reference, with higher growth in the presence of strange plants and reduction of root elongation in the presence of the same plant or clones. Thus, in this context, we intend to test the following hypotheses: (I) as the genetic variability increases, the plant would increase the capacity for self reference and non-self reference; (II) different environmental factors may influence the ability of reference and not self-reference; (III) in a situation of limited resources is expected the prevalence of competitive interactions among individuals with greater genetic variability, and the prevalence of collaborative interactions in individuals with lower genetic variability. To test the influence of genetic variability in the ability of self-reference of Eucalyptus urophylla we use three groups of different levels of genetic variability: minimum, average and maximum level of variability (v1, v2 and v3, respectively). After preparation of seedlings, the seedlings will be removed from the tubes, its roots will be washed and the secondary roots will be pruned, leaving only two roots per plant of similar size (split-root). Each pot contains two roots of the same plant (treatment of self reference) or two roots of different plants (treatment of non-self reference), forming triads. Triads of variability v1 and v3 will be subject to different conditions of water availability, temperature, nutrient availability, and irradiance. The cultivation time will be between 30 to 45 days under growth chamber conditions, so that new modules appear on plants by the end of the experiment. At the end of the experiment the plants will have roots excised and evaluated for growth of shoots and roots. The results of each variable will be analyzed by analysis of variance (ANOVA, p = 0.05), considering the factorial experiment, and averages are compared by Tukey test (p = 0.05). (AU)

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)
BERTOLI, SUZANA CHIARI; NERIS, DANIEL MOREIRA; SALA, HELIDA REGINA; VIEIRA, WILLYAM DE LIMA; SOUZA, GUSTAVO MAIA. The level of relatedness affects self/nonself discrimination in Eucalyptus urophylla seedlings. CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIER, v. 50, n. 5, p. 500-509, MAY 2020. Web of Science Citations: 0.
SUZANA CHIARI BERTOLLI; JULIANO DE SOUZA; GUSTAVO MAIA SOUZA. CARACTERIZAÇÃO FOTOSSINTÉTICA DA ESPÉCIE ISOHÍDRICA PATA-DE-ELEFANTE EM CONDIÇÕES DE DEFICIÊNCIA HÍDRICA. Rev. Caatinga, v. 28, n. 3, p. 196-205, Set. 2015.

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