Document type
Journal articles
Document subtype
Full paper
Title
Differences in constitutive and inducible defences in pine species determining susceptibility to pinewood nematode
Participants in the publication
C. S. Pimentel (Author)
E. V. Gonçalves (Author)
P. N. Firmino (Author)
T. Calvão (Author)
L. Fonseca (Author)
I. Abrantes (Author)
O. Correia (Author)
Dep. Biologia Vegetal
cE3c
C. Máguas (Author)
Dep. Biologia Vegetal
cE3c
Summary
The pinewood nematode, Bursaphelenchus xylophilus, originating from North America (NA), is a major invasive pine pest in Eurasia. It was first detected in Portugal in 1999 associated with maritime pine, Pinus pinaster, and has been differently affecting the main local pine species, P. pinaster and P. pinea. Field studies and direct inoculation experiments in Pinus spp. seedlings, under controlled conditions, were performed to assess whether the differences in constitutive and inducible defences are determining the different susceptibility of pine host species to B. xylophilus. Host co?evolution with the pathogen was also assessed, including the NA P. radiata, widely used in forestry in the northeast of the Iberian peninsula. Pine mortality in the field was positively related with the abundance of B. xylophilus, and concentration of phenolics and condensed tannins in pines. In the greenhouse assay, seedling tissues were analysed for constitutive investment in defences, as well as the potential inducibility of those defences as driven by B. xylophilus inoculation. Slower growing P. pinea presented higher levels of constitutive defences than faster growing P. pinaster, with only P. pinaster being affected by B. xylophilus. Furthermore, co?evolution with the pathogen is important, with the fast?growing NA P. radiata presenting an inducible and effective response to B. xylophilus. Results point to the importance of integrating data on pine life history traits, including growth rate, and production of constitutive and inducible defences, into predictive models for this invasive forest pest.
Where published
Plant Pathology
Publication Identifiers
ISSN - 0032-0862
Publisher
Wiley
Starting page
131
Last page
139
Document Identifiers
URL -
http://dx.doi.org/10.1111/ppa.12548
DOI -
https://doi.org/10.1111/ppa.12548
Rankings
SCIMAGO Q1 (2017) - 1.063 - Plant Science
SCOPUS Q1 (2017) - 1.063 - Plant Science
Web Of Science Q1 (2017) - 2.303 - AGRONOMY - SCIE
Keywords
Bursaphelenchus xylophilus
condensed tannins
Pinus pinaster
Pinus pinea
Pinus radiata
total phenols
Notes
Published online on 16 May 2016