Dieback of cork oak (Quercus suber) in Catalonia (NE Spain) caused by Botryosphaeria stevensii

Luque, Jordi; Girbal, Josep

doi:10.1111/j.1439-0329.1989.tb00764.x

Cited by 45 publications

(42 citation statements)

References 2 publications

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“…Since the beginning of the 1980s, decline phenomena have been observed in several cork oak ecosystems (Luque & Girbal, 1989;Bakry & Abourouh, 1995;Santos, 1995;Sanchez et al, 2003;Linaldeddu et al, 2007a). To date, this syndrome has represented the main phytopathological problem of oak forests.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and characterization of peptaibols from Trichoderma citrinoviride, an endophytic fungus of cork oak, using electrospray ionization quadrupole time-of-flight mass spectrometry

et al. 2009

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A cork oak endophytic strain of Trichoderma citrinoviride, previously selected for its antagonistic potential against various fungal pathogens involved in oak decline, was screened for the production of bioactive secondary metabolites. From liquid culture a mixture of polypeptide antibiotics (peptaibols) belonging to the paracelsin family was isolated and characterized. This peptide mixture was purified by column chromatography and preparative TLC on silica gel, and separated by analytical HPLC. It was analysed by MALDI-TOF MS and nano-ESI-QTOF MS. Tandem mass experiments were performed to determine the amino acid sequences based on the fragmentation pattern of selected parent ions. The mixture comprised 20-residue peptides with Cterminal phenylalaninol and N-terminal acetylation. Twenty-eight amino acid sequences were identified, and amino acid exchanges were located in positions 6, 9, 12 and 17. Among them, seven sequences are new as compared to those reported in the database specifically for peptaibols and in the literature. In addition, we obtained experimental evidence suggesting the existence of non-covalent dimeric forms (homo-and hetero-) of the various peptaibol species. The peptide mixture showed strong antifungal activity toward seven important forest tree pathogens, and it was highly toxic in an Artemia salina (brine shrimp) bioassay. These results emphasize the cryptic role of endophytic fungi as a source of novel bioactive natural products and biocontrol agents.

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Section: Introductionmentioning

confidence: 99%

Occurrence and characterization of peptaibols from Trichoderma citrinoviride, an endophytic fungus of cork oak, using electrospray ionization quadrupole time-of-flight mass spectrometry

et al. 2009

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“…On the other hand, preliminary results (Luque, unpublished) (Luque and Girbal, 1989) (Shoemaker, 1964;Sutton, 1980;Vajna, 1986;Tisserat et al, 1988). The fungus can induce dieback and trunk canker formation depending on the host species and the infection site.…”

mentioning

confidence: 97%

Use of stem diameter variations for detecting the effects of pathogens on plant water status

Cohen¹,

Luque²,

Alvarez³

1997

Ann. For. Sci.

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“…In addition to great water loss, cork stripping often causes dangerous wounds that represent the pathway for many fungi. In particular, extraction wounds act as a significant entry way for Diplodia corticola (Luque and Girbal 1989).…”

Section: Cork Oak Forest Management: What To Do and What Not To Domentioning

confidence: 99%

“…These pathogens cause local infections on trunk, branches, and twigs, variable in severity and incidence. Since the early 1980s, some of these fungi have received increasing attention because they have consistently been associated with etiology of cork oak mortality in many countries (Franceschini et al 1999;Luque and Girbal 1989).…”

Section: Stem Branch and Twig Pathogensmentioning

confidence: 99%

Endemic and Emerging Pathogens Threatening Cork Oak Trees: Management Options for Conserving a Unique Forest Ecosystem

et al. 2016

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Cork oak (Quercus suber) forests are economically and culturally intertwined with the inhabitants of the Mediterranean basin and characterize its rural landscape. These forests cover over two million hectares in the western Mediterranean basin and sustain a rich biodiversity of endemisms as well as representing an important source of income derived from cork production. Currently cork oak forests are threatened by several factors including human-mediated disturbances such as poor or inappropriate management practices, adverse environmental conditions (irregular water regime with prolonged drought periods), and attacks of pathogens and pests. All these adverse factors can interact, causing a complex disease commonly known as “oak decline.” Despite the numerous investigations carried out so far, decline continues to be the main pathological problem of cork oak forests because of its complex etiology and the resulting difficulties in defining suitable control strategies. An overview of the literature indicates that several pathogenic fungi and oomycota can play a primary role in the etiology of this syndrome. Therefore, the aim of this review is to analyze the recent advances achieved regarding the bio-ecology of the endemic and emerging pathogens that threaten cork oak trees with particular emphasis on the species more directly involved in oak decline. Moreover, the effect of climate change on the host-pathogen interactions, a task fundamental for making useful decisions and managing cork oak forests properly, is considered.

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Dieback of cork oak (Quercus suber) in Catalonia (NE Spain) caused by Botryosphaeria stevensii

Cited by 45 publications

References 2 publications

Occurrence and characterization of peptaibols from Trichoderma citrinoviride, an endophytic fungus of cork oak, using electrospray ionization quadrupole time-of-flight mass spectrometry

Occurrence and characterization of peptaibols from Trichoderma citrinoviride, an endophytic fungus of cork oak, using electrospray ionization quadrupole time-of-flight mass spectrometry

Use of stem diameter variations for detecting the effects of pathogens on plant water status

Endemic and Emerging Pathogens Threatening Cork Oak Trees: Management Options for Conserving a Unique Forest Ecosystem

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