Virulence of Fungi Isolated from Ambrosia Beetles to <i>Acer amoenum</i> Branches

Saragih, Syaiful Amri; Kusumoto, Dai; Takemoto, Shuhei; Torii, Masato; Kamata, Naoto

doi:10.1094/pdis-11-20-2543-re

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…VAM diversity is the main factor that maintains plant diversity and its function in the ecosystem (14) . Fungal hyphae comes out of plant roots to reach the soil and help absorb certain nutrients for further transmission to plants, especially immobilized nutrients such as phosphate (P), zinc (Zn), copper (Cu), and molybdate (Mo) (15,16) .…”

Section: Definition Of Mycorrhizamentioning

confidence: 99%

Growth Response of Oil Palm Plant Seeds after Application of Vesicular Arbuscular Mycorrhiza (VAM) Fungus

Darwis¹,

Nasution²,

Elfahmi³

et al. 2023

IJST

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Objectives: This study aims to determine the growth response of oil palm seedlings to VAM and to determine the appropriate VAM dose for oil palm seedling growth. Methods: This study took place in the screen house and plant protection laboratory and VAM isolate starters were gathered from the work area. The test used a factorial completely randomized design (CRD) with 2. The first treatment was VAM dose with 4 factors and the second was NPK fertilizer with two factors. The VAM was applied for one month after germination and plant maintenance for 16 weeks with seven parameters. Findings: The results show that the VAM dose treatment and the application of NPK fertilizer did not have a significant effect on the growth of oil palm seedlings in the pre-nursery (16 weeks) so it took a long time to see the role of VAM in oil palm seedlings. The application of VAM 150 g/polybag on oil palm seedlings in pre-nursery tended to give the best response to the growth of seedling height, a number of leaves, fresh weight of the crown, dry weight of the crown, fresh weight of roots, dry weight of roots and root volume. The VAM inoculum supplied made symbiosis with oil palm seedling roots with a high infection rate. The number of VAM spores in the media and the percentage of colonization on the roots were influenced by the dose of VAM inoculum given. Novelty: Vesicular Arbuscular Mycorrhiza (VAM) Fungus in oil palm seeds are important to increase the growth of the number of leaves, fresh weight of the crown, and dry weight of the crown. Efforts to increase the quality and quantity of oil palm production are appropriately necessary so that the desired target can be achieved.

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Section: Definition Of Mycorrhizamentioning

confidence: 99%

Growth Response of Oil Palm Plant Seeds after Application of Vesicular Arbuscular Mycorrhiza (VAM) Fungus

Darwis¹,

Nasution²,

Elfahmi³

et al. 2023

IJST

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“…Ophiostomatoid fungi have mutualistic interactions with bark or ambrosia beetles, and they have been recognized as potential causal agents for tree mortality in many countries [53][54][55]. Among these fungi, Raffaelea species potentially contributed several observed mass tree mortality events [56][57][58][59].…”

Section: Fungus As the Causal Agent Of Kowmentioning

confidence: 99%

Oak Decline Syndrome in Korean Forests: History, Biology, and Prospects for Korean Oak Wilt

Choi

Lee

Jung

et al. 2022

Forests

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Oak decline syndrome has been observed in South Korea and Japan and variously referred to as Korean oak wilt (KOW) and Japanese oak wilt (JOW). We reviewed aspects of the historical occurrence of KOW, disease cycle, and its potential causes. KOW has been seen principally in Mongolian oak (Quercus mongolica Fisch. ex Ledeb.). The first occurrence of KOW was in 2004 in Seongnam, South Korea. KOW is associated with the fungus Raffaelea quercus-mongolicae, which is vectored by the ambrosia beetle Platypus koryoensis. In addition, it has been suggested that yeasts have evolved a symbiotic relationship with the vector without antagonism for the pathogenic fungus. The number of trees in Korea killed by KOW increased to about 331,000 in 2011, but then decreased to about 157,000 in 2019. We hypothesized that trees infected by R. quercus-mongolicae accumulate phenolic compounds in the sapwood and the vector (P. koryoensis) beetles then avoid these trees. Therefore, the number of hosts available for the beetle after a KOW outbreak decrease due to accumulation of phenolic compounds in the wood, although most oak trees survive outbreaks. Therefore, P. koryoensis beetles move longer distances after outbreaks to find susceptible host trees. Novel occurrence of KOW in Korea may be due to either (1) an increase in tree age (size) in Korean oak stands, for which the beetle has a known preference or (2) climate change, which may be increasing the number of weakened or stressed trees, for which P. koryoensis also shows a preference.

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“…Instead of semi-cultured method (Saragih et al, 2021), we developed a culture-independent method based on DNA using qPCR in this paper. The qPCR is considered as an accurate, rapid, sensitive, and culture-independent method to detect and quantify microorganism directly from environmental samples (Chemidlin Prâvost-Bourâ et al, 2011;Saragih et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Specific Primer Designing for Quantitative PCR (qPCR) of Entomopathogenic Fungi Isaria fumosorosea from Soil Samples

Saragih,

Takemoto,

Sato

et al. 2023

JPTI

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Entomopathogenic fungi are important component for regulation of pests in ecosystem. Isaria fumosorosea, as one of the entomopathogenic fungi, was reported to successfully controlled the outbreaks of forest defoliators attacked larch (Larix kaempferi) plantation in Furano, Japan and beech (Fagus crenata) forest in Hachimantai, Japan. Instead of semi-cultured method, in this paper, a culture-independent method based on DNA using qPCR was developed for specific detection and quantification of I. fumosorosea directly from soil DNA extract using specific primer. The primer IFU5821F/IFU6061R was designed and found to be the best primer pair for I. fumosorosea. Standard soil DNA was obtained with strong relationship and good fitting with five levels (R2= 0.989, E = 0.58). I. fumosorosea could not be detected from all soil samples which was possibility caused by low density of the fungi. The qPCR was likely a rapid and specific method to detect the fungus from soil.

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Virulence of Fungi Isolated from Ambrosia Beetles to Acer amoenum Branches

Cited by 3 publications

References 21 publications

Growth Response of Oil Palm Plant Seeds after Application of Vesicular Arbuscular Mycorrhiza (VAM) Fungus

Growth Response of Oil Palm Plant Seeds after Application of Vesicular Arbuscular Mycorrhiza (VAM) Fungus

Oak Decline Syndrome in Korean Forests: History, Biology, and Prospects for Korean Oak Wilt

Specific Primer Designing for Quantitative PCR (qPCR) of Entomopathogenic Fungi Isaria fumosorosea from Soil Samples

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