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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.)

Aluminum-induced high IAA concentration may explain the Al susceptibility in Citrus limonia

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Silva, Carolina M. S. [1] ; Cavalheiro, Mariana F. [1] ; Bressan, Anna C. G. [1] ; Carvalho, Brenda M. O. [1] ; Banhos, Otavia F. A. A. [1] ; Purgatto, Eduardo [2] ; Harakava, Ricardo [3] ; Tanaka, Francisco A. O. [4] ; Habermann, Gustavo [5]
Total Authors: 9
[1] Univ Estadual Paulista, Inst Biociencias, Dept Bot, Programa Posgrad Ciencias Biol Biol Vegetal, UNESP, Av 24-A, 1515, BR-13506900 Rio Claro, SP - Brazil
[2] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Alimentos & Nutr Expt, NAPAN, FoRC Food Res Ctr, Av Prof Lineu Prestes 580, Bl 14, BR-05508000 Sao Paulo, SP - Brazil
[3] Ctr P&D Sanidade Vegetal, Lab Bioquim Fitopatol, Inst Biol, Av Conselheiro R Alves 1252, BR-04014002 Sao Paulo, SP - Brazil
[4] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Fitopatol & Nematol, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[5] Univ Estadual Paulista, UNESP, Inst Biociencias, Dept Bot, Av 24-A, 1515, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Plant Growth Regulation; v. 87, n. 1, p. 123-137, JAN 2019.
Web of Science Citations: 1

In acidic soils (pH < 5.0), aluminum (Al) occurs as Al3+, which is phytotoxic and reduces the root growth by hormonal imbalance and/or cell wall rigidity. However, the explanations for the decrease in root growth are not clear. A 60-day study was held with `Rangpur' lime (Citrus limonia) plants grown in nutrient solution containing 0 and 1480 A mu M Al. We measured plant biometric data and used root apices to analyze auxin (IAA), the expression of some Al-responsive genes that had been differentially expressed in a transcriptome analysis and anatomical profiles. We found up-regulated expression of multidrug and toxic compound exudation (Cl-MATE channel), citrate synthase (Cl-CS) and pectin methylesterase inhibitor (Cl-PMEI) genes, but while Cl-PMEI expression was increased after 7 days, Cl-CS and Cl-MATE were up-regulated only after 60 days, suggesting that the timing of these events was ineffective against Al. These results could be associated with the Al-induced decrease in root growth and anatomical root damage. In addition, genes related to IAA cell transport were not differentially expressed in the transcriptome analysis. Therefore, high IAA and up-regulation of auxin-related small RNAs suggest Al-induced high IAA concentration rather than Al-induced disruption in IAA distribution in root cells of this species. (AU)

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: 14/14386-0 - Indirect reference to the physiological effects of Al through microscopy techniques in Cerrado native species
Grantee:Anna Carolina Gressler Bressan
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/07914-8 - FoRC - Food Research Center
Grantee:Bernadette Dora Gombossy de Melo Franco
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/14216-3 - Aluminum tolerance mechanisms in Styrax camporum involves organic acids secretion?
Grantee:Brenda Mistral de Oliveira Carvalho Bittencourt
Support type: Scholarships in Brazil - Master