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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.)

Polyethylene glycol damages grafted citrus plants based on biometric, physiological, and biochemical responses

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Author(s):
Girardi, Eduardo Augusto [1] ; Brandao, Andrea Dias [2] ; Coelho, Rubens Duarte [3] ; Zarate do Couto, Hilton Thadeu [3] ; Buckeridge, Marcos Silveira [2] ; Alves Mourao Filho, Francisco de Assis [3]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Crop Sci, Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Piracicaba, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Revista Brasileira de Fruticultura; v. 40, n. 6 2018.
Web of Science Citations: 0
Abstract

Drought tolerance is a major trait for the selection of citrus rootstocks in breeding programs. PEG 4000 solution at 110 g L-1 (osmotic potential of -376 kPa) was used to evaluate biometric, physiological, and biochemical responses of grafted citrus plants in pots. `Valencia' sweet orange plants grafted onto `Rangpur' lime (drought tolerant) rootstock showed greater plant growth compared to that on `Swingle' citrumelo (drought sensitive) rootstock, regardless of PEG-induced stress; however, biological responses to PEG were similar on both rootstocks. Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG. Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms. The results corroborate the limitation of PEG for assessing drought tolerance of citrus plants at the whole plant level. (AU)