Doutorado em Ciências Florestais

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17466

Nível: Doutorado
Ano de início: 2013
Conceito atual na CAPES: 4
Ato normativo:Ofício N. 39-12/2007/CTC/CCA/CAPES de 31/07/2007
Periodicidade de seleção: Semestral
Área(s) de concentração:Ciências Florestais
Url do curso: https://cienciasflorestais.ufes.br/pt-br/pos-graduacao/PPGCFL/detalhes-do-curso?id=1425

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Navegando Doutorado em Ciências Florestais por Autor "Alexandre, Rodrigo Sobreira"

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    Conservação Ex Situ E Tolerância À Dessecação Em Sementes De Lecythis Pisonis Cambess
    (Universidade Federal do Espírito Santo, 2024-02-23) Araujo, Caroline Palacio de; Alexandre, Rodrigo Sobreira; https://orcid.org/0000-0002-5248-6773; http://lattes.cnpq.br/5340049196888351; https://orcid.org/0000-0002-0259-2543; http://lattes.cnpq.br/1424851890250661; Santos, Heloisa Oliveira dos; https://orcid.org/0000-0003-1384-4969; http://lattes.cnpq.br/7905575260641836; Lopes, José Carlos; https://orcid.org/0000-0002-4880-0547; http://lattes.cnpq.br/1183524198654764; Pereira, Wilson Vicente Souza ; https://orcid.org/0000-0002-7931-8382; http://lattes.cnpq.br/2641981653845321; Maciel, Khétrin Silva ; https://orcid.org/0000-0002-8590-7917; http://lattes.cnpq.br/6753673403909545
    The species Lecythis pisonis Cambess. is a chestnut tree belonging to the Lecythidaceae family, commonly found in the Atlantic Forest and Amazon biomes. Studies related to its propagation and ex situ conservation are important, contributing to the protection of its genetic resources over time. This research answers important questions related to the propagation of the seminiferous species L. pisonis, whose objectives were a) Chapter I – to study fixed temperatures and thermal shocks at different exposure times on the physiology of seeds and initial growth of L. pisonis seedlings; b) chapter II – analyze the influence of seed size and shading on seedling emergence and the phenotypic and photosynthetic plasticity of L. pisonis seedlings; c) chapter III – analyze tolerance to desiccation and maintenance of seed viability of the chestnut tree L. pisonis; and d) chapter IV – analyze the physiological quality of L. pisonis seeds during ex situ storage under different temperature conditions and time variations. Chapter I was divided into experiment 1 (fixed temperatures 30; 35; 40; 45 and 50 °C and thermal shocks at temperatures 30-35; 30-40; 30-45; 30-50; 35-40; 35-45; 35-50; 40-45; 40-50 and 45-50 °C at exposure times of 20 h/4 h and 21 h/3 h) and experiment 2 (fixed temperatures 30 and 45 °C and thermal shock 30-45 °C at exposure times 23.5 h/0.5 h; 23 h/1 h; 22 h/2 h; 21 h/3 h; 19 h/5 h; 18 h/6 h and 17 h/7 h ). Both were conducted in a completely randomized design, with four replications of 25 seeds each, totaling 100 seeds/treatment. In Chapter II, the treatments were arranged in a randomized block design and split-plot system, analyzing seed mass (small: 4 to 5.9 g; medium: 6 to 7.9 g and large: 8 to 9.9 g) x reduction in light capacity (0; 30; 50; 70 and 80%), using four repetitions of 25 seeds each, totaling 100 seeds/treatment. In Chapter III, the treatments were arranged in a randomized block design, consisting of treatments with different water contents in the seeds (30%, 15%, 10%, and 4%). Then, part of the seeds with a water content of 4% was stored in aluminum containers for three months at freezer (-20) and ultrafreezer (-86 °C) temperatures. Each treatment consisted of 100 seeds, organized in four replications of 25 seeds each. Chapter IV was divided into two storage experiments, with L. pisonis seeds placed in Kraft Nat® paper bags (jute bags) measuring 23.5 x 10 x 31.5 cm and stored in germination chambers of the Biochemical Oxygen Demand (BOD) type, at temperature and relative humidity of 25 °C (RH = 63%); 6 °C (RH = 49%); 2 °C (RH = 31%) and -6 °C (RH = 10%), with the emergence of experiment 1 conducted in BOD and that of experiment 2 in a greenhouse. In Chapter, I, experiment 1 presented efficient results when exposing L. pisonis seeds to thermal shock 30-45 °C (20 h/4 h) and in experiment 2, when subjecting the seeds to thermal shock 30-45 °C (21h/3h). In both cases, there was high seedling emergence, high vigor, and an efficient antioxidant system, with increased activity of the enzymes SOD, CAT, and APX. In Chapter II, it was observed that large seeds showed the highest seedling emergence (83.9%) when exposed to shading of 49.32% (~50%). In Chapter III, seedling emergence decreased depending on the water content in the seeds (30>15>10>4%), varying between 88 and 64% emergence, respectively, which were classified as intermediate seeds. In Chapter IV, experiment 1 obtained greater germination (95%) and seedling emergence (65%) in seeds stored at 2 °C for 11 months. For experiment 2, seeds stored at a temperature of 6 °C achieved seedling emergence rates greater than 70% for most months of storage. It is concluded in Chapter I that the thermal shock of 30-45 °C at exposure times of 20 h/4 h and 21 h/3 h are optimal for the emergence of L. pisonis seedlings. In Chapter II, the use of large seeds (8 to 9.9 g) and 50% shading is recommended for the emergence of L. pisonis seedlings. In Chapter III, it is concluded that L. pisonis seeds have intermediate characteristics. In Chapter IV, it is concluded that it is possible to preserve L. pisonis seeds for one year in storage at a temperature of 6 °C, which are classified as intermediate seeds. Keywords: seeds, germination, oilseed plants, seed storage, seed physiology.
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    DESENVOLVIMENTO, MATURAÇÃO E GERMINAÇÃO IN VITRO DE SEMENTES, E EMBRIOGÊNISE SOMÁTICA DE Euterpe edulis MARTIUS
    (Universidade Federal do Espírito Santo, 2022-02-28) Mello, Tamyris de; Alexandre, Rodrigo Sobreira; https://orcid.org/0000000252486773; http://lattes.cnpq.br/5340049196888351; https://orcid.org/0000000311895404; http://lattes.cnpq.br/; Otoni, Wagner Campos; https://orcid.org/; http://lattes.cnpq.br/; Santos, Heloisa Oliveira dos; https://orcid.org/; http://lattes.cnpq.br/; Carvalho, Virginia Silva; https://orcid.org/; http://lattes.cnpq.br/; Schmildt, Edilson Romais; http://lattes.cnpq.br/0648502408490406
    The species Euterpe edulis Martius, is a palm belonging to the Arecaceae family, popularly known as juçara, it is widely distributed in the Atlantic Forest. In recent decades this palm tree has been exploited for its palm heart, and the fact that it grows
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    Efeito dos tutores de madeira tratada com CCA-C na qualidade da pimenta-do-reino (Piper nigrum L.) cultivada no norte do estado do Espírito Santo
    (Universidade Federal do Espírito Santo, 2023-08-31) Rosa, Arlon Bastos da; Paes, Juarez Benigno; https://orcid.org/0000000347764246; http://lattes.cnpq.br/3454401627877927; https://orcid.org/0000000161335988; http://lattes.cnpq.br/0436776646557918; Alexandre, Rodrigo Sobreira; https://orcid.org/0000000252486773; http://lattes.cnpq.br/5340049196888351; Medeiros Neto, Pedro Nicó de; https://orcid.org/0000-0001-5647-0050; http://lattes.cnpq.br/6441001734932075; Baraúna, Edy Eime Pereira; https://orcid.org/0000-0001-5239-9592; http://lattes.cnpq.br/3160416445274012; Lopez, Yonny Martinez
    The objective of the research was to analyze the effects of using wooden stakes treated with chromated copper arsenate, type C (CCA-C) on the quality of black pepper (Piper nigrum L.) cultivated in the north of the State of Espírito Santo. To evaluate the concentration of copper, chromium and arsenic elements, components of CCA-C, samples were collected from underground roots, green and mature fruits of plants aged 5; 7 and 13 years, plus the control (5-year-old plants, untreated wooden tutor). For the quantification of the elements, the material was dried, crushed and digested in a 2N hydrochloric acid (HCl) solution, and submitted to chemical analysis in mass spectrometry with inductively coupled plasma (ICP-MS/MS), using helium (He), as a collision gas. The results indicated that copper was found in higher concentrations in plants, being more adsorbed by underground roots, with a decrease in green and ripe fruits. Chromium behaved similarly to copper, and arsenic did not show differences between the analyzed ages, being with a concentration lower than that allowed by the Resolution of the Collegiate Board - RDC 26, June 2nd, 2015, of the Brazilian Health Ministry. For plants aged 5 and 7 years (treated tutors) copper concentration was observed above the maximum allowed. However, copper concentrations in mature fruits from plants aged 13 years were within acceptable values. Thus, fruits of different ages and plant staking must be mixed and homogenized in order to obtain a good quality product that can be consumed without major consequences to human health.
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    FISIOLOGIA DE SEMENTES E METABOLISMO ANTIOXIDATIVO NA EMERGÊNCIA DE Lecythispisonis CAMBESS.: INFERÊNCIAS SOBRE TEMPERATURA ÓTIMA E APTIDÃO CLIMÁTICA PARA A SEMEADURA
    (Universidade Federal do Espírito Santo, 2022-02-24) Rosa, Thuanny Lins Monteiro; Alexandre, Rodrigo Sobreira; https://orcid.org/0000000252486773; http://lattes.cnpq.br/5340049196888351; https://orcid.org/0000000169796914; http://lattes.cnpq.br/; Ferreira, Adesio; https://orcid.org/0000000270001725; http://lattes.cnpq.br/5400370038397801; Mengarda, Liana Hilda Golin; https://orcid.org/; http://lattes.cnpq.br/; Freitas, Allan Rocha de; https://orcid.org/; http://lattes.cnpq.br/; Maciel, Khetrin Silva
    The climate changes registered in the last decades have triggered a severe loss of biodiversity. High temperatures induce a high reproductive effort of trees that is not translated into high production of viable seeds. The temperature is one of the most i
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    PROPAGAÇÃO DE Paratecoma peroba POR MINIESTAQUIA
    (Universidade Federal do Espírito Santo, 2020-02-28) Araujo, Emanuel Franca; Goncalves, Elzimar de Oliveira; https://orcid.org/0000000176752493; http://lattes.cnpq.br/4127505406039950; https://orcid.org/0000000190906006; http://lattes.cnpq.br/; Alexandre, Rodrigo Sobreira; https://orcid.org/0000000252486773; http://lattes.cnpq.br/5340049196888351; Klippel, Valeria Hollunder; https://orcid.org/; http://lattes.cnpq.br/; Xavier, Talita Miranda Teixeira; https://orcid.org/; http://lattes.cnpq.br/
    The forest species Paratecoma peroba (Record and Mell) Kuhlm, belongs to the family Bignoniaceae, being native to the Atlantic Forest, presenting relevant ecological and economic interest. It has a restricted area of natural occurrence within the coastal