A case study of Ceratocystis canker epidemic in relation with Euwallacea interjectus infestation

Morita, Takeshige; Hara, Hirokazu; Mise, Daisaku; Jikumaru, Shota

doi:10.4165/kapps.54.29

Cited by 8 publications

(10 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although this disease is sometimes called Ceratocystis canker, the pathogen does not form a canker but causes a wilt. In addition, the results support previous reports by Kajitani (1996) and Morita et al (2012) that claimed that E. interjectus is a vector of C. ficicola. In order to clarify the responses of host cells to C. ficicola, we are currently conducting inoculation experiments on fig saplings.…”

Section: Discussionsupporting

confidence: 91%

“…Therefore, in the fig trees, enlargement of discolored and dysfunctional sapwood gradually progresses in association with the continuous activity of E. interjectus. Morita et al (2012) reported that fig trees did not die for two years after the first invasion of E. interjectus into the stems and the simultaneous infection of the pathogen. The delay of wilt symptoms in fig trees of more than one year from the first infestation of E. interjectus seems to have induced a negative opinion on the beetle's contribution to the disease development.…”

Section: Discussionmentioning

confidence: 99%

“…Today, this disease occurs widely across fig plantation areas, most likely because of the distribution of infected saplings from diseased orchards (Kajitani et al 1992;Shimizu et al 1999;Togawa et al 1999). Some farms abandoned their orchards because of the extensive damages caused by this wilt disease (Shimizu et al 1999;Kajitani & Masuya 2011;Morita et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Female adults fly from dead trees in late March and mid-July (Kajitani 1999) and invade healthy tree trunks near the ground (Nitta et al 2005). Morita et al (2012) reported from field researches that this disease became epidemic in relation to the activity of vector beetles in Hiroshima Prefecture in western Japan. However, many researchers and orchard owners do not believe that the beetle is a vector of this disease, supposing instead that E. interjectus is a "secondary pest" and cannot affect healthy trees.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Xylem Dysfunction in Ficus Carica Infected With Wilt Fungus Ceratocystis Ficicola and the Role of the Vector Beetle Euwallacea Interjectus

Kajii¹,

Morita²,

Jikumaru³

et al. 2013

IAWA J

View full text Add to dashboard Cite

Ceratocystis ficicola causes serious wilt disease in many fig orchards in Japan. The transmission of this pathogen is thought to occur via soil to host roots, and an ambrosia beetle, Euwallacea interjectus, has been reported as a vector of the pathogen. Anatomical investigations were made on the disease development process with a particular focus on the responses of host tissue to the activities of the vector beetle and the pathogen. Living 26- and 8-year-old Ficus carica trees that were naturally infected with C. ficicola and had holes excavated by E. interjectus were used for analysis. Dark brown discoloration was observed in the sapwood of specimens with poor shoot elongation and slight leaf wilt at harvest. Discolored sapwood coincided with the distribution of hyphae of the pathogen, which was verified by the presence of conidiophores. Most of the beetle’s gallery was distributed inside the discolored area. In the non-discolored sapwood adjacent to the border of the discolored area, some galleries were elongated and contained living new generation adults and larvae of E. interjectus. Hyphae of the pathogen and colored substances were identified also around those new galleries.The present study showed that elongation of galleries by E. interjectus in the functional sapwood induces the wide distribution of the pathogen and contributes to the expansion of the discolored area in which vessels were dysfunctional. This process causes a shortage of water supply and wilting in the infected trees. Euwallacea interjectus must be contributing to the symptom development of this wilt disease.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Xylem Dysfunction in Ficus Carica Infected With Wilt Fungus Ceratocystis Ficicola and the Role of the Vector Beetle Euwallacea Interjectus

Kajii¹,

Morita²,

Jikumaru³

et al. 2013

IAWA J

View full text Add to dashboard Cite

show abstract

“…Seven gram-positive bacteria, seven gram-negative bacteria, and one fungus were identified (Table 2). Previous studies have shown that E. interjectus is a vector of Ceratocystis ficicola (Kajitani 1996;Morita et al 2012) and that a wide distribution of C. ficicola in sapwood causes wilt symptoms in trees (Kajii et al 2013). However, in this study, DGGE analysis identified only Fusarium sp.…”

Section: Discussioncontrasting

confidence: 60%

Characterization of FsXEG12A from the cellulose-degrading ectosymbiotic fungus Fusarium spp. strain EI cultured by the ambrosia beetle

et al. 2020

View full text Add to dashboard Cite

Despite the threat of Fusarium dieback posed due to ambrosia fungi cultured by ambrosia beetles such as Euwallacea spp., the wood-degradation mechanisms utilized by ambrosia fungi are not fully understood. In this study, we analyzed the 16S rRNA and 18S rRNA genes of the microbial community from the Ficus tree tunnel excavated by Euwallacea interjectus and isolated the cellulose-degrading fungus, Fusarium spp. strain EI, by enrichment culture with carboxymethyl cellulose as the sole carbon source. The cellulolytic enzyme secreted by the fungus was identified and expressed in Pichia pastoris, and its enzymatic properties were characterized. The cellulolytic enzyme, termed FsX-EG12A, could hydrolyze carboxymethyl cellulose, microcrystalline cellulose, xyloglucan, lichenan, and glucomannan, indicating that the broad substrate specificity of FsXEG12A could be beneficial for degrading complex wood components such as cellulose, xyloglucan, and galactoglucomannan in angiosperms. Inhibition of FsXEG12A function is, thus, an effective target for Fusarium dieback caused by Euwallacea spp.

show abstract

Transcriptome analysis of Euwallacea interjectus reveals differentially expressed unigenes related to developmental stages and egg laying

Zhao

Tan

et al. 2023

Comparative Biochemistry and Physiology Part D: Genomics and Pr

View full text Add to dashboard Cite

A case study of Ceratocystis canker epidemic in relation with Euwallacea interjectus infestation

Cited by 8 publications

References 1 publication

Xylem Dysfunction in Ficus Carica Infected With Wilt Fungus Ceratocystis Ficicola and the Role of the Vector Beetle Euwallacea Interjectus

Xylem Dysfunction in Ficus Carica Infected With Wilt Fungus Ceratocystis Ficicola and the Role of the Vector Beetle Euwallacea Interjectus

Characterization of FsXEG12A from the cellulose-degrading ectosymbiotic fungus Fusarium spp. strain EI cultured by the ambrosia beetle

Transcriptome analysis of Euwallacea interjectus reveals differentially expressed unigenes related to developmental stages and egg laying

Contact Info

Product

Resources

About