Guilherme Augusto Rodrigues de SouzaUniversidade Estadual do Norte Fluminense · Laboratory of Plant Genetic Improvement – LMGV
Guilherme Augusto Rodrigues de Souza
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Citations since 2017
11 Research Items
Coffea canephora has two botanical varieties, Robusta and Conilon. Intraspecific variability was hypothesized and projected for the selection of C. canephora plants able to maintain production in the context of global climate changes. For that, architectural, C-assimilation and biomass analyses were performed on 17-month-old Robusta (clones ‘A1’ an...
Carica papaya L. is a tropical and subtropical fruit tree. In such climatic regions, cultivation frequently includes exposure to supra-optimal temperatures, which may affect the leaf photosynthetic capacity. Two papaya genotypes, 'Candy' and 'Golden THB', were used to study the effects of supra-optimal temperatures on photochemical responses. The s...
The main characteristic of Cannabis sativa L. is the production of compounds of medicinal interest known as phytocannabinoids. Environmental factors and crop management practices are directly related to the yield of these compounds. Knowing how these factors influence the production of phytocannabinoids is essential to promote greater metabolite yi...
NUE. The comparative proteomic analysis allowed the identification of 79 differentially accumulated proteins (DAPs) in the comparison of high/low N for P2 and 96 DAPs in the comparison of high/low N for L80. The NUE and N uptake efficiency (NUpE) presented high means in P2 in comparison to L80 at both N levels, but the NUE, NUpE, and N utilization...
In the context of increasing drought frequencies, water sensitive plant species need to have defined irrigation thresholds. One such species is papaya (Carica papaya L.), with a current demand for the selection of drought tolerance genotypes. The aim of this study was to evaluate the growth, leaf gas exchanges, sap flow and chlorophyll (Chl) fluore...
Leaves in different positions respond differently to dynamic fluctuations in light availability, temperature and to multiple environmental stresses. The current hypothesis states that elevated atmospheric CO2 (e[CO2]) can compensate for the negative effects of water scarcity regarding leaf gas exchanges and coffee bean quality traits over the canop...
Knowing the key hydraulic traits of different genotypes at early seedling stages can potentially provide crucial information and save time for breeding programs. In the current study we investigated: (1) how root, stem and whole plant conductivities are linked to xylem traits, and (2) how the integrated hydraulic system impacts leaf water potential...
Piperaceae species are of great importance for the Brazilian flora, due to their medicinal potential. However, work with these species is still very scarce, especially considering the divergence in the germination process. Given the above, the objective of this work was to evaluate the germinative development of the seeds of Piper marginatum, Piper...
ARTICLE INFO ABSTRACT O objetivo deste trabalho foi de avaliar as características físico-químicas de nove variedades de laranja enxertadas sobre limoeiro "Cravo" e tangerineira 'Cleopatra'. Foram avaliados cinco frutos por planta, sendo três plantas de cada tratamento. Adotou-se o delineamento experimental inteiramente casualizado, em esquema fator...
Partial rootzone drying (PRD) is an irrigation technique that usually applies less water (than well-watered control treatments) to only part of the rootzone (the irrigated side) and alternates the irrigated and non-irrigated sides. However, an incomplete understanding of the effects of its components (decreased water application versus frequency of alternating the irrigated side) on physiological responses of fruit crops such as coffee, is considered to be a constraint for its adoption under tropical conditions. Therefore, a study will be performed to determine effects of PRD on soil water dynamics, leaf gas exchange, leaf spectral reflectance, photochemical efficiency, yield, fruit quality, water use efficiency and water footprint in fieldgrown coffee
The aim of this project is to study the combination of plant growth-promoting bacteria (PGPB) and non-drought tolerant (NDT) and drought tolerant (DT) popcorn maize genotypes using physiological traits such as gas exchange, chlorophyll fluorescence, leaf spectral reflectance, leaf water potential, root hydraulic conductivity, and osmotic adjustment.
This project aims to study the ecophysiology of hops in the northern region of Rio de Janeiro. We try to study how environmental factors, i.e. temperature, light, and vapor pressure deficits, affect photosynthesis, growth, production and quality of hops flowers