Phosphite shifts physiological and hormonal profile of Monterey pine and delays Fusarium circinatum progression

Cerqueira, Andreia; Alves, Artur; Berenguer, Helder; Correia, Bárbara; Gómez-Cádenas, Aurelio; Diez, Julio J.; Monteiro, Pedro; Pinto, Glória

doi:10.1016/j.plaphy.2017.02.020

Cited by 45 publications

(46 citation statements)

References 37 publications

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“…All plants were evaluated daily throughout the experiment by visual observation to assess disease symptoms (tip dieback, needle wilting and chlorosis and resin formation). As Pinus with different levels of susceptibility to F. circinatum were studied, independent sampling points were carried out for each species when at least 50% of the plants of one of the groups inoculated with F. circinatum expressed disease symptoms (Cerqueira et al , ; Amaral et al , ): the first sampling point (A1) was performed for P. radiata , the most susceptible species; the second sampling point (A2) corresponded to when P. pinaster disease symptoms were established; and the third sampling point (A3) was performed when the relatively resistant P. pinea showed disease symptoms.…”

Section: Methodsmentioning

confidence: 99%

“…Needles were collected, frozen in liquid nitrogen and kept at −80 °C for further quantification of pigments, proline and hormones. Pigments (total chlorophyll, carotenoids and anthocyanins) and hormones (ABA, JA and SA) were quantified as described by Amaral et al (), while proline concentration was assessed following the procedure described by Cerqueira et al ().…”

Section: Methodsmentioning

confidence: 99%

“…Fusarium circinatum infection has been shown to induce changes in needle gas exchanges, water relations and hormonal dynamics, and increased proline and anthocyanin concentration in P. radiata (Cerqueira et al , ). Changes in antioxidant activity and carbohydrates have also been reported for P. pinaster after F. circinatum inoculation (Vivas et al , , ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Trichoderma viride pre‐inoculation in pine species with different levels of susceptibility to Fusarium circinatum: physiological and hormonal responses

et al. 2019

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Pine pitch canker (PPC), caused by Fusarium circinatum, affects Pinus species worldwide. Although no effective solutions have yet been found to control it, there is a growing interest in using biological control agents (BCA) such as Trichoderma to avoid the application of chemical‐based products. Using species with an increasing level of susceptibility to PPC (Pinus pinea, Pinus pinaster and Pinus radiata), this study aimed to evaluate the effect of Trichoderma viride pre‐inoculation on disease development, assessing several physiological and hormonal parameters. A 2‐week period elapsed between T. viride and F. circinatum inoculation. Sampling for each species was performed independently when at least 50% of the plants of one of the inoculated groups developed disease symptoms. Fusarium circinatum infection reduced water status and photosynthesis, but increased proline, abscisic acid and jasmonic acid concentrations in plants of P. radiata and P. pinaster with symptoms; while in P. pinea water relations were maintained and anthocyanin accumulation occurred in the presence of F. circinatum. In P. radiata, T. viride pre‐inoculation accelerated disease progression, with some PPC‐induced responses augmented (decreased water potential and photosynthesis; increased substomatal CO2 concentration) and novel changes not found in seedlings inoculated exclusively with F. circinatum (increased electrolyte leakage and salicylic acid; decreased relative water content). This suggests that T. viride may be initially recognized as an invading organism, subverting the plant defence mechanisms for successful root colonization. If seedlings are not allowed to recover from this state, pathogen infection may thus be facilitated, highlighting the importance of application timing in BCA strategies.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Trichoderma viride pre‐inoculation in pine species with different levels of susceptibility to Fusarium circinatum: physiological and hormonal responses

et al. 2019

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“…() and Cerqueira et al . () who demonstrated that chitosan oligomers and phosphite salts were able to inhibit mycelial growth of F. circinatum in vitro . As noted above, pine rhizobacterial isolates of E. billingiae and P. fluorescens protected young P. radiata seedlings against F. circinatum (Iturritxa et al ., ), probably as a consequence of a combined effect of mycelial growth inhibition and induced resistance.…”

Section: Other Environmentally Friendly Approaches For Controlling Fmentioning

confidence: 99%

Environmentally friendly methods for controlling pine pitch canker

et al. 2019

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Fusarium circinatum is a highly virulent invasive pathogen that causes the disease commonly known as pine pitch canker (PPC). On mature trees, the most common symptoms of PPC include resin bleeding, resinous cankers, wilting of needles and dieback. In nurseries the main symptoms are yellowish needles, and wilting of foliage and shoots. PPC is considered one of the most important diseases of conifers globally and at least 60 species of Pinus along with Pseudotsuga menziesii are known to be susceptible. Quarantine regulations are crucial to minimize the risk of new introductions into disease‐free countries. However, if these measures fail, implementation of environmentally friendly control methods is currently encouraged in an integrated management approach that minimizes the use of chemicals in forests. This review therefore summarizes current knowledge of biological control using endophytic fungi, bacteria and viruses, and other environmentally friendly methods to control PPC, including thermotherapy, natural products with fungicidal effects, promoters of innate host resistance mechanisms and breeding for resistance. Key research gaps to be addressed for improvement of effective management of this disease are discussed.

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“…The Fusarium circinatum isolate (FcCa6) used in this work belongs to mating type 2 (MAT-2) and was isolated from an infected Pinus radiata tree located in Comillas (Cantabria, Northern Spain; GPS: 4 • 17 17.706" W; 43 • 20 5.033" N; 265 m above sea level) [28,[48][49][50]. Plant material consisted of seedlings of three Czech conifers: P. sylvestris, P. abies, and L. decidua.…”

Section: Fungal Isolates and Plant Materialsmentioning

confidence: 99%

Evaluation of the Susceptibility of Several Czech Conifer Provenances to Fusarium circinatum

Martín‐García

Lukačevičová

Flores-Pacheco

et al. 2018

Forests

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Pine pitch canker (PPC), caused by Fusarium circinatum, is considered among the most important diseases affecting pines in many locations throughout the world. In Europe, F. circinatum is currently present in the Iberian Peninsula, posing a high risk of its spread into currently disease-free countries in Europe. In the present study, the susceptibility of Pinus sylvestris, Picea abies, and Larix decidua originating in the Czech Republic to F. circinatum was tested. Furthermore, the presence of asymptomatic yet infected seedlings was also checked. This study demonstrated the pathogenicity of F. circinatum to the Czech provenance of P. sylvestris, whereas Picea abies and Larix decidua proved to be tolerant. The reisolation of F. circinatum beyond the inoculation point demonstrated that this quarantine pathogen is able to infect the three conifers tested, giving rise to asymptomatic seedlings for at least eight and a half months. To our knowledge, this is the first study in which the presence of symptomless seedlings has been recorded in the genera Picea and Larix. This finding points out that the European legislation would fail to avoid the risk of new introductions via symptomless seedlings, since this legislation is only restricted to plants of the genus Pinus and the species Pseudotsuga menziesii.

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Phosphite shifts physiological and hormonal profile of Monterey pine and delays Fusarium circinatum progression

Cited by 45 publications

References 37 publications

Effect of Trichoderma viride pre‐inoculation in pine species with different levels of susceptibility to Fusarium circinatum: physiological and hormonal responses

Effect of Trichoderma viride pre‐inoculation in pine species with different levels of susceptibility to Fusarium circinatum: physiological and hormonal responses

Environmentally friendly methods for controlling pine pitch canker

Evaluation of the Susceptibility of Several Czech Conifer Provenances to Fusarium circinatum

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