CV Lattes
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Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Agência Paulista de Tecnologia dos Agronegócios (APTA). Instituto Agronômico (IAC) (Institutional affiliation for the last research proposal) Birthplace: Brazil
Rafael Vasconcelos Ribeiro is an agronomist by the Federal University of Lavras (2000, Brazil, Pibic/CNPq scholarship) with Master degree in Plant Physiology and Biochemistry (2002, Brazil, Fapesp scholarship) and Doctorate degree in Agricultural Meteorology (2006, Brazil, Fapesp scholarship), both by the Luiz de Queiroz College of Agriculture, University of Sao Paulo. Currently, he is an assistant professor at the University of Campinas (Unicamp) and his studies are related to crop environmental physiology with emphasis on photosynthesis of citrus and sugarcane. (Source: Lattes Curriculum)
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Dr. Ribeiro's groups has recently shown that sugarcane plants previously exposed to drought and rehydration events exhibited a better photosynthetic performance and growth rate when exposed to a new drought event compared to plants previously grown in well-watered conditions. Plant memory refers to the capacity of a previous exposure to stressful events trigger changes that regulate all p…
Sugarcane is an economically important crop in Brazil. São Paulo (SP) state, Brazil has experienced large-scale conversion of pasture to sugarcane in recent decades, with the expansion of biofuels. This rain-fed agricultural area is exposed to seasonal drought and periodic high tropospheric ozone (O3) pollution at levels known elsewhere to be detrimental to plant productivity. Counter to …
A recent study of our group has shown that sugarcane plants previously exposed to cycles of water deficit and rehydration or those originated from material that faced water deficit had their photosynthetic performance and growth enhanced when exposed to a new drought event. Plant memory refers to the capacity of a previous exposure to stressful events triggers changes in gene expression p…
BBEST is an international conference scheduled to take place every three years to discuss the advances and state-of-the-art research in the field of bioenergy. The implementation of BBEST 2020 is a development of the actions of the BIOEN / FAPESP Program. Brazil, as one of the world leaders in renewable energies from biomass, hosts this event. The Conference will have as its theme "Bioene…
(Only some records are available in English at this moment)
A recent study developed by our group demonstrated that sugarcane plants previously exposed to cycles of water deficit and rehydration or originated from material that had undergone water deficit had their photosynthetic performance and growth favored when exposed to drought again. The previous exposure to stressful events can trigger changes in the pattern of gene expression that regulat…
Sugarcane is largely grown in rainfed areas, where water deficit is a frequent environmental challenge. In previous experiments and independent of water availability, we found higher growth of plants originating from mother plants (plants in which propagation material was obtained) subjected to drought, an evidence of transgenerational memory. If this mechanism of drought resistance is pr…
The practice of grafting affects the plant susceptibility to water deficit since rootstock and canopy exhibit different resistance to drought. In xylem vessels, the tension generated by transpiration can cause formation of embolism, which reduces the ability of plants to carry water. The vulnerability of branches to embolism varies throughout the growing season of plants as well as after …
The soil water deficit is the cause of negative pressure in the xylem, which can result in an abrupt change of the water meta-stable state, forming bubbles and interrupting water transport. Although embolism is well-known to occur, the xylem hydraulic properties that allow the transport of water under negative pressure and the physico-chemical properties that prevent constant embolism for…
(Only some records are available in English at this moment)
Embolism has been proposed as one of the main causes of drought-induced tree mortality, resulting in reduced xylem conductivity and, ultimately, hydraulic failure. Embolism resistance varies among species and is typically evaluated by vulnerability curves (VCs) constructed by the relationship between xylem water potential and corresponding degrees of xylem embolism. Different methods have…
The water transport in plants is not a completely passive process and the presence of ions in the sap can increase the xylem conductance. Hypothetically, hydrogels (pectins) on intervessel pit membrane may shrink if ions are present in the sap, which results in reduced resistance to water flow. However, this explanation is challenged by the lack of pectins in mature intervessel pit membra…
In a previous study, we noticed a significant reduction in leaf nitrogen concentration in the phase that precedes the maturation of sugarcane in field conditions. Although we know that there is a strong relationship between nitrogen and photosynthesis in higher plants, the processes underlying the assimilation of CO2 affected by nitrogen are poorly understood in C4 plants, such as sugarca…
Water shortage is likely to be one of the major global environmental stresses of the21st century. There are recent evidence that support that nitric oxide (NO) play animportant role in the defense mechanisms of plants under environmental stress,including drought. However, the relation between drought tolerance of plants and NOmetabolism is still unclear. As NO is a molecule related to env…
(Only some records are available in English at this moment)
| 3 / 3 | Ongoing research grants |
| 9 / 7 | Completed research grants |
| 1 / 1 | Ongoing scholarships in Brazil |
| 16 / 11 | Completed scholarships in Brazil |
| 1 / 1 | Ongoing scholarships abroad |
| 4 / 4 | Completed scholarships abroad |
| 34 / 27 | All research grants and scholarships |
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