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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.)

Roles of auxin and ethylene in aerenchyma formation in sugarcane roots

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Tavares, E. Q. P. [1] ; Grandis, A. [1] ; Lembke, C. G. [2] ; Souza, G. M. [2] ; Purgatto, E. [3] ; De Souza, A. P. [1] ; Buckeridge, M. S. [1]
Total Authors: 7
[1] Univ Sao Paulo, Inst Biociencias, Dept Bot, Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Quim, Dept Bioquim, Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Ciencias Farmaceut, Dept Alimentos & Nutr Expt, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: PLANT SIGNALING & BEHAVIOR; v. 13, n. 3 2018.
Web of Science Citations: 3

Although the cross-talk between auxin and ethylene has been described during plant development, the role played by auxin upon gene expression during aerenchyma formation is poorly understood. Root aerenchyma formation results from the opening of gas spaces in the cortex. It is part of a developmental program (constitutive) or due to ethylene treatment or abiotic stress (induced) such as flooding and nutrient starvation. This process relies on programmed cell death and cell wall modifications. Here we followed development of aerenchyma formation in sugarcane along 5 cm from the root apex. As a constitutive process, the aerenchyma formation was observed in the cortex from the 3rd cm onwards. This occurred despite 1-methylcyclepropene (1-MCP) treatment, an inhibitor of ethylene perception. However, this process occurred while ethylene (and auxin) levels decreased. Within the aerenchyma formation zone, the concentration of ethylene is lower in comparison to the concentration in maize. Besides, the ratio between both hormones (ethylene and auxin) was around 1:1. These pieces of evidence suggest that ethylene sensitivity and ethylene-auxin balance may play a role in the formation of aerenchyma. Furthermore, the transcriptional analysis showed that genes related to cell expansion are up-regulated due to 1-MCP treatment. Our results help explaining the regulation of the formation constitutive aerenchyma in sugarcane. (AU)

FAPESP's process: 08/57908-6 - National Institute of Science and Technology of Bioethanol
Grantee:Marcos Silveira Buckeridge
Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 13/16225-1 - DNA-protein interactions regulating the degradation of cell wall during Aerenchyma development in roots of sugarcane
Grantee:Eveline Queiroz de Pinho Tavares
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 09/52840-7 - Center of Biological and Industrial Processes for Biofuels - CeProBIO
Grantee:Igor Polikarpov
Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 11/07586-5 - Investigation of mechanisms regulating cell wall degradation in sugar cane roots during the aerenchyma formation
Grantee:Eveline Queiroz de Pinho Tavares
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 10/17104-5 - Cell wall degradation in sugarcane roots
Grantee:Marcos Silveira Buckeridge
Support type: Regular Research Grants