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Linking phytohormones with growth, transport activity and metabolic responses to cadmium in tomato

Citation

Chu, Z and Munir, S and Zhao, G and Hou, J and Du, W and Li, N and Lu, Y and Yu, Q and Shabala, S and Ouyang, B, Linking phytohormones with growth, transport activity and metabolic responses to cadmium in tomato, Plant Growth Regulation, 90, (3) pp. 557-569. ISSN 0167-6903 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 Springer Nature B.V.

DOI: doi:10.1007/s10725-020-00580-w

Abstract

This study investigated the role of phytohormones in the mediating effect of cadmium on growth and metabolism of tomato plants. Micro-Tom plants and its hormone mutants, procera (pro), diageotropica (dgt), epinastic (epi), and notabilis (not) have been used. Tomato seedlings were grown for 5 weeks under controlled hydroponics condition and then treated with CdCl2 concentration ranging from 0 to 100 μM for 2- to 6-week. Lipid peroxidation, leaf chlorophyll, elemental (Cd, Fe, Zn, Ca, Mg) content, and antioxidant enzyme activity were determined. Cd stress considerably altered the transcriptional level of the metal transport-related genes. Cadmium inhibited the uptake of iron (Fe) and zinc (Zn), whereas it has no noticeable effect on magnesium (Mg) and calcium (Ca) content, which might have been induced by the defense against Cd toxicity. The overall results demonstrated that not and epi mutants (with altered levels of ABA and ethylene, respectively) had a Cd-sensitive phenotype while dgt mutant (with reduced sensitivity to auxin) avoided damaging effects of Cd stress. This observation is explained by the lowest Cd accumulation in dgt roots. These results provide valuable information for the relative importance of auxin, ethylene, and abscisic acid in regulating plant responses to heavy metal toxicity.

Item Details

Item Type:Refereed Article
Keywords:cadmium, antioxidant enzyme, chlorophyll, gene expression, hormone
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Field grown vegetable crops
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:139483
Year Published:2020
Web of Science® Times Cited:3
Deposited By:Agriculture and Food Systems
Deposited On:2020-06-17
Last Modified:2020-08-20
Downloads:0

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