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ABA signaling for stomatal closure under Al stress

Grant number: 18/08902-7
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): July 09, 2018
Effective date (End): December 12, 2018
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal Investigator:Gustavo Habermann
Grantee:Marina Alves Gavassi
Supervisor: Ian Charles Dodd
Host Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Research place: Lancaster University, England  
Associated to the scholarship:15/25409-4 - Role of ABA in water relations in metabolisms with contrasting sensitivities to Al3+, BP.DR

Abstract

It is believed that the aluminum (Al)-induced decrease in leaf hydration is due to its direct effect of Al on reducing the root growth, which would have low root surface and volume for water uptake. However, there is previous evidence suggesting that the Al-induced decrease in stomatal conductance (gs) could be related to a low intrinsic root capacity for water uptake and transport. While some studies indicate that abscisic acid (ABA) is involved in Al toxicity and Al resistance mechanisms in roots, the role of ABA as a root-to-shoot Al stress signal is still unclear. Considering the main role of ABA in gs, we will investigate whether Al decreases root hydraulic conductance leading to leaf dehydration triggering ABA biosynthesis in leaves or if Al directly causes ABA biosynthesis in the root signaling water deficit to the shoots. For this, we will use wild-type (WT) and flacca mutant (flc - ABA deficient) genotypes of tomato grown in semi-hydroponic conditions with and without Al. Water relations parameters, such as gs, water potential, relative water content will be measured in leaves while the ABA content will be measured in roots and leaves.

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Scientific publications (6)
(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)
GAVASSI, MARINA ALVES; ALVES, FREDERICO ROCHA RODRIGUES; MONTEIRO, CAROLINA CRISTINA; GAION, LUCAS APARECIDO; ALVES, LETICIA RODRIGUES; PRADO, RENATO DE MELLO; GRATA, PRISCILA LUPINO; CARVALHO, ROGERIO FALLEIOS. Photomorphogenic tomato mutants high-pigment 1 and aurea responses to iron. Scientia Horticulturae, v. 307, p. 9-pg., . (13/04316-2, 15/25409-4, 18/08902-7)
SILVA, GISELLE SCHWAB; GAVASSI, MARINA ALVES; CARVALHO, BRENDA MISTRAL DE OLIVEIRA; HABERMANN, GUSTAVO. High abscisic acid and low root hydraulic conductivity may explain low leaf hydration in 'Mandarin' lime exposed to aluminum. TREE PHYSIOLOGY, v. N/A, p. 14-pg., . (18/15359-8, 18/08902-7, 15/25409-4, 17/26144-0)
GAVASSI, MARINA ALVES; SILVA, GISELLE SCHWAB; SANTIAGO DA SILVA, CAROLINA DE MARCHI; THOMPSON, ANDREW J.; MACLEOD, KYLE; RAYNER OLIVEIRA, PAULO MARCELO; CAVALHEIRO, MARIANA FEITOSA; DOMINGUES, DOUGLAS SILVA; HABERMANN, GUSTAVO. NCED expression is related to increased ABA biosynthesis and stomatal closure under aluminum stress. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 185, p. 12-pg., . (16/10896-0, 18/08902-7, 17/26144-0, 18/25658-2, 15/25409-4)
GAVASSI, MARINA ALVES; SILVA, GISELLE SCHWAB; SANTIAGO DA SILVA, CAROLINA DE MARCHI; THOMPSON, ANDREW J.; MACLEOD, KYLE; RAYNER OLIVEIRA, PAULO MARCELO; CAVALHEIRO, MARIANA FEITOSA; DOMINGUES, DOUGLAS SILVA; HABERMANN, GUSTAVO. CED expression is related to increased ABA biosynthesis and stomatal closure under aluminum stres. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 185, . (15/25409-4, 17/26144-0, 16/10896-0, 18/25658-2, 18/08902-7)
SILVA, G. S.; RODRIGUES, J. S.; CARVALHO, B. M. D. O.; GAVASSI, M. A.; BRESSAN, A. C. G.; HABERMANN, G.. Absence of aluminium compromises root integrity, reduces leaf hydration and Rubisco performance in Qualea grandiflora, an Al-accumulating species. Plant Biology, v. 25, n. 5, p. 10-pg., . (18/15359-8, 18/08902-7, 17/26144-0, 15/25409-4)
GAVASSI, MARINA ALVES; DODD, IAN CHARLES; PUERTOLAS, JAIME; SILVA, GISELLE SCHWAB; CARVALHO, ROGERIO FALLEIROS; HABERMANN, GUSTAVO. Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 179, . (15/25409-4, 18/08902-7)

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