NDLI: Cadmium stress antioxidant responses and root-to-shoot communication in grafted tomato plants

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Cadmium stress antioxidant responses and root-to-shoot communication in grafted tomato plants

Content Provider	Springer Nature Link
Author	Gratão, Priscila Lupi Monteiro, Carolina Cristina Tezotto, Tiago Carvalho, Rogério Falleiros Alves, Letícia Rodrigues Peters, Leila Priscila Azevedo, Ricardo Antunes
Copyright Year	2015
Abstract	Many aspects related to ROS modulation of signaling networks and biological processes that control stress responses still remain unanswered. For this purpose, the grafting technique may be a powerful tool to investigate stress signaling and specific responses between plant organs during stress. In order to gain new insights on the modulation of antioxidant stress responses mechanisms, gas-exchange measurements, lipid peroxidation, H2O2 content, proline, superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), ascorbate peroxidase (APX) and guaiacol peroxidase (GPOX) were analyzed in Micro-Tom grafted plants submitted to cadmium (Cd). The results observed revealed that higher amounts of Cd accumulated mainly in the roots and rootstocks when compared to leaves and scions. Macronutrients uptake (Ca, S, P and Mg) decreased in non-grafted plants, but differed among plant parts in all grafted plants. The results showed that the accumulation of proline observed in scions of grafted plants could be associated to the lower MDA contents in the scions of grafted plants. In the presence of Cd, non-grafted plants displayed increased CAT, GR, GPOX and APX activities for both tissues, whilst grafted plants revealed distinct trends that clearly indicate signaling responses from the rootstocks, allowing sufficient time to activate defense mechanisms in shoot. The information available concerning plants subjected to grafting can provide a better understanding of the mechanisms of Cd detoxification involving root-to-shoot signaling, opening new possibilities on strategies which can be used to manipulate heavy metal tolerance, since antioxidant systems are directly involved in such mechanism.
Starting Page	803
Ending Page	816
Page Count	14
File Format	PDF
ISSN	09660844
Journal	BioMetals
Volume Number	28
Issue Number	5
e-ISSN	15728773
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cadmium Micro-Tom Grafting Signaling Oxidative stress Biochemistry Pharmacology/Toxicology Microbiology Cell Biology Plant Physiology Medicine/Public Health
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Biochemistry, Genetics and Molecular Biology Biomaterials Agricultural and Biological Sciences

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