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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low root PIP1-1 and PIP2 aquaporins expression could be related to reduced hydration in `Rangpur' lime plants exposed to aluminium

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Cavalheiro, Mariana F. [1] ; Gavassi, Marina A. [1] ; Silva, Giselle S. [1] ; Nogueira, Matheus A. [1] ; Silva, Carolina M. S. [2] ; Domingues, Douglas S. [3] ; Habermann, Gustavo [3]
Total Authors: 7
[1] Univ Estadual Paulista, Programa Posgrad Ciencias Biol Biol Vegetal, Dept Bot, UNESP, Inst Biociencias, Ave 24-A, 1515, BR-13506900 Rio Claro, SP - Brazil
[2] Univ Sao Paulo, ESALQ, Dept Ciencias Biol, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[3] Univ Estadual Paulista, Dept Bot, UNESP, Inst Biociencias, Ave 24-A, 1515, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: FUNCTIONAL PLANT BIOLOGY; v. 47, n. 2, p. 112-121, 2020.
Web of Science Citations: 1

In acidic soils, aluminium (Al) occurs as Al3+, which is phytotoxic. One of the most conspicuous symptoms of Al toxicity is the root growth inhibition, which can lead to low water uptake and consequent reduction in leaf hydration and gas exchange. However, fibrous xylem vessels have been observed in roots of `Rangpur' lime plants (Citrus limonia L.) when exposed to Al, which could affect the functioning of aquaporins, ultimately reducing their expression. We confirmed a decrease of CO2 assimilation (A), stomatal conductance (g(s)), transpiration (E) and relative leaf water content (RWC) in 3-month-old C. limonia plants exposed to 1480 mu M Al in nutrient solution for 90 days. The estimated hydraulic conductivity from soil to the leaf (K-L) and leaf water potential (psi w) also showed low values, although not consistently reduced over time of Al exposure. The relative expression of aquaporin genes belonging to PIP family (PIP1-1, PIP1-2 and PIP2) showed downregulation for ClPIP1-1 and ClPIP2 and upregulation for ClPIP1-2 in plants exposed to Al. Furthermore, ClPIP1-1 was positively correlated with A and g(s) in plants exposed to Al. Therefore, downregulation of ClPIP1-1 and ClPIP2 in roots of `Rangpur' lime plants could be associated with the low leaf hydration of this species when exposed to Al. (AU)

FAPESP's process: 17/26144-0 - Hydraulic, metabolic and molecular aspects of Al3+ interference in above ground plant hydration in Citrus limonia
Grantee:Gustavo Habermann
Support type: Regular Research Grants
FAPESP's process: 13/11370-3 - Gene expression on Al3+ tolerance mechanisms comparing a Cerrado species (Qualea grandiflora) and lime (Citrus limonia cv. 'Cravo')
Grantee:Carolina de Marchi Santiago da Silva
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/25409-4 - Role of ABA in water relations in metabolisms with contrasting sensitivities to Al3+
Grantee:Marina Alves Gavassi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/10896-0 - Can hexanoic acid signaling modulate the transcriptome, metabolome and pathogen development in coffee trees?
Grantee:Douglas Silva Domingues
Support type: Research Grants - Young Investigators Grants