Under fungal attack on a metalliferous soil

ROS or not ROS?

Cosimo Taiti (Author), Elisabetta Giorni (Author), Ilaria Colzi (Author), Sara Pignattelli (Author), Nadia Bazihizina (Author), Antonella Buccianti (Author), Simone Luti (Author), Luigia Pazzagli (Author), Stefano Mancuso (Author), Cristina Gonnelli (Author)

Abstract

We investigated how the adaptation to metalliferous environments can influence the plant response to biotic stress. In a metallicolous and a non-metallicolous population of Silene paradoxa the induction of oxidative stress and the production of callose and volatiles were evaluated in the presence of copper and of the PAMP fungal protein cerato-platanin, separately and in combination. Our results showed incompatibility between the ordinary ROS-mediated response to fungal attack and the acquired mechanisms of preventing oxidative stress in the tolerant population. A similar situation was also demonstrated by the sensitive population growing in the presence of copper but, in this case, with a lack of certain responses, such as callose production. In addition, in terms of the joint behaviour of emitted volatiles, multivariate statistics showed that not only did the populations respond differently to the presence of copper or biotic stress, but also that the biotic and abiotic stresses interacted in different ways in the two populations. Our results demonstrated that the same incompatibility of hyperaccumulators in ROS-mediated biotic stress signals also seemed to be exhibited by the excluder metallophyte, but without the advantage of being able to rely on the elemental defence for plant protection from natural enemies.

Keywords

biotic interactions;callose;heavy metals;oxidative stress;VOCs;

Data

Language:	English
Year of publishing:	2016
Typology:	1.01 - Original Scientific Article
Organization:	UNG - University of Nova Gorica
UDC:	502/504
COBISS:	5611003
ISSN:	0269-7491
Views:	2550
Downloads:	0
Average score:	0 (0 votes)
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Other data

URN:	URN:SI:UNG
Type (COBISS):	Not categorized
Pages:	str. 282-292
Issue:	ǂVol. ǂ210
Chronology:	Mar. 2016
DOI:	10.1016/j.envpol.2015.12.020
ID:	11560140