scholarly journals Sprouting Success of Quercus phillyraeoides Attacked by Platypus quercivorus

2019 ◽  
Vol 101 (6) ◽  
pp. 272-277
Author(s):  
Yumiko (Nakamori) Yamashita ◽  
Tsuyoshi Kuriu
Keyword(s):  
Platypus Quercivorus ◽  
Quercus Phillyraeoides

Neomisticius platypi n. sp. and N. variabilis n. sp. (Tylenchomorpha: Anguinidae) from dead oak trees in Japan

Nematology ◽  
2021 ◽  
pp. 1-21
Author(s):  
Natsumi Kanzaki ◽  
Hayato Masuya ◽  
Keiko Hamaguchi
Keyword(s):  
New Species ◽  
Vas Deferens ◽  
Morphological Characteristics ◽  
Platypus Quercivorus ◽  
Oak Trees ◽  
Two New Species ◽  
Previous Definition ◽  
Rectal Glands ◽  
Stylet Length ◽  
Definition Of

Summary Two new Neomisticius species, typologically and phylogenetically close to each other, are described and illustrated from dead Quercus trees and an ambrosia beetle, Platypus quercivorus. The two species share some stylet morphological characteristics, namely, they both possess a long conus occupying more than half of the total stylet length, a long crustaformeria composed of more than 160 cells (eight rows of more than 20 cells each), and a short and broad female tail with a digitate tip. They are distinguished from each other by N. variabilis n. sp. having a wide, spindle-shaped male bursa with a blunt terminus and N. platypi n. sp. having an oval bursa with a rounded terminus. In addition, the males and females of both species have three large rectal glands and the posterior end of the male testis (distal end of the vas deferens) bears three cells that seemingly function as a valve between the vas deferens and the cloacal tube. These characteristics have not been reported in other tylenchids. Currently, the genus contains only three species: the two new species and N. rhizomorphoides, which has a normal stylet with a short conus, a short crustaformeria, and lacks rectal glands and valve cells in the vas deferens. Therefore, the two new species are readily distinguished from N. rhizomorphoides and, based on the previous definition, may even represent a new genus. However, considering their phylogenetic closeness and biological similarities (e.g., association with ambrosia beetles), the generic definition of Neomisticius was emended to include these new species.

scholarly journals Isolation of Endophytic Fungi QPS 05 from Quercus phillyraeoides A. Gray and Its Potential for α-Glucosidase Inhibitory Activity

2018 ◽  
Vol 20 (1) ◽  
pp. 1-7
Author(s):  
Anastasia Wheni Indrianingsih ◽  
Amalia Indah Prihantini ◽  
Sanro Tachibana
Keyword(s):  
Fatty Acids ◽  
Endophytic Fungi ◽  
Inhibitory Activity ◽  
Endophytic Fungus ◽  
Inhibitory Concentration ◽  
Life Cycles ◽  
Ic50 Values ◽  
Quercus Phillyraeoides ◽  
Alternaria Sp ◽  
Harmful Effects

AbstractEndophytic fungi are the microorganisms that spend all or part of their life cycles within plant tissue without causing harmful effects on the plant. In this study, 14 endophytic fungus from Quercus phillyraeoides A. Gray were isolated. Alternaria sp. QPS 05, an endophytic fungi which was isolated from the stem of Q. phillyraeoides A. Gray showed the highest α-glucosidase inhibitory activity. Further separation of ethyl acetate extract from the fungus led to the isolation of active substance from hexane-soluble fraction which give fatty acids mixture consist of palmitic acid, oleic acid, linoleic acid and linolenic acid (1) strong inhibitory activity against α-glucosidase. Isolated fatty acids (1) had inhibitory concentration (IC50) values against Saccharomyces cerevisiae was 12.10 μg/mL. The results of the present study showed that endophytic fungus from Alternaria sp. QPS 05 potentially contained a rich source of natural antidiabetic medicine.

scholarly journals Analysis of Charcoal from Quercus phillyraeoides

2013 ◽  
Vol 41 (3) ◽  
pp. 181-186 ◽  
Author(s):  
Soo-Jeong Shin ◽  
Byung-Ro Kim
Keyword(s):  
Quercus Phillyraeoides

Potential impact of global warming on deciduous oak dieback caused by ambrosia fungus Raffaelea sp. carried by ambrosia beetle Platypus quercivorus (Coleoptera: Platypodidae) in Japan

2002 ◽  
Vol 92 (2) ◽  
pp. 119-126 ◽  
Author(s):  
N. Kamata ◽  
K. Esaki ◽  
K. Kato ◽  
Y. Igeta ◽  
K. Wada
Keyword(s):  
Global Warming ◽  
Reproductive Success ◽  
Evolutionary Process ◽  
Ambrosia Beetle ◽  
Quercus Crispula ◽  
Platypus Quercivorus ◽  
Stable Relationship ◽  
Future Global Warming ◽  
Potential Impact ◽  
Associated Species

AbstractDeciduous oak dieback in Japan has been known since the 1930s, but in the last ten years epidemics have intensified and spread to the island’s western coastal areas. The symbiotic ambrosia fungus Raffaelea sp. is the causal agent of oak dieback, and is vectored by Platypus quercivorus (Murayama). This is the first example of an ambrosia beetle fungus that kills vigorous trees. Mortality of Quercus crispula was approximately 40% but much lower for associated species of Fagaceae, even though each species had a similar number of beetle attacks. It is likely that other oaks resistant to the fungus evolved under a stable relationship between the tree, fungus and beetle during a long evolutionary process. Quercus crispula was probably not part of this coevolution. This hypothesis was supported by the fact that P. quercivorus showed the least preference for Q. crispulayet exhibited highest reproductive success in this species. Therefore, P. quercivorus could spread more rapidly in stands with a high composition of Q. crispula. The present oak dieback epidemic in Japan probably resulted from the warmer climate that occurred from the late 1980s which made possible the fateful encounter of P. quercivorus with Q. cripsula by allowing the beetle to extend its distribution to more northerly latitudes and higher altitudes. Future global warming will possibly accelerate the overlapping of the distributions of P. quercivorus and Q. crispula with the result that oak dieback in Q. crispula will become more prevalent in Japan.

scholarly journals Effects of Attack Time on the Development and Reproduction of the Oak Borer, Platypus quercivorus (Murayama).

2000 ◽  
Vol 44 (3) ◽  
pp. 189-196 ◽  
Author(s):  
Koichi Soné ◽  
Kazuki Uto ◽  
Shusaku Fukuyama ◽  
Takeshi Nagano
Keyword(s):  
Platypus Quercivorus ◽  
Attack Time

scholarly journals A New Cytosporone Derivative from the Endophytic Fungus Cytospora sp

2014 ◽  
Vol 9 (7) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Tomoya Takano ◽  
Takuya Koseki ◽  
Hiromasa Koyama ◽  
Yoshihito Shiono
Keyword(s):  
Antimicrobial Activity ◽  
Endophytic Fungus ◽  
2D Nmr ◽  
Ambrosia Beetle ◽  
Oak Wilt ◽  
Tree Disease ◽  
Platypus Quercivorus ◽  
Mass Spectral ◽  
Screening Study ◽  
Raffaelea Quercivora

Japanese oak wilt (JOW) is a tree disease caused by the fungus Raffaelea quercivora, which is vectored by the ambrosia beetle, Platypus quercivorus. In a screening study of the inhibitory active compounds from fungi, a new cytosporone analogue, compound 1, was isolated from the endophytic fungus Cytospora sp. TT-10 isolated from Japanese oak, together with the known compounds, integracin A (2), cytosporones N (3) and A (4). Their structures were determined by extensive 1D– and 2D–NMR spectroscopic and mass spectral analyses. Compound 1 was identified as 4,5-dihydroxy-3-heptylphthalide and named cytosporone E. Compounds 2 and 3 showed antimicrobial activity against Raffaelea quercivora.

Platypus quercivorus ambrosia beetles use leaf volatiles in host selection

2020 ◽  
Vol 168 (12) ◽  
pp. 928-939
Author(s):  
Duy Long Pham ◽  
Yasuto Ito ◽  
Ryuichi Okada ◽  
Hidetoshi Ikeno ◽  
Haruna Kazama ◽  
...  
Keyword(s):  
Host Selection ◽  
Ambrosia Beetles ◽  
Leaf Volatiles ◽  
Platypus Quercivorus

Myctolaimus platypi sp. n. (Nematoda: Cylindrocorporidae) isolated from the oak borer, Platypus quercivorus (Coleoptera: Platypodidae)

Nematology ◽  
2006 ◽  
Vol 8 (5) ◽  
pp. 717-725 ◽  
Author(s):  
Natsumi Kanzaki ◽  
Masahide Kobayashi ◽  
Ai Nozaki ◽  
Kazuyoshi Futai
Keyword(s):  
New Species ◽  
Body Length ◽  
B Value ◽  
New Combinations ◽  
Male And Female ◽  
Platypus Quercivorus ◽  
The Third ◽  
A Value ◽  
Third Stage ◽  
C Value

Abstract Myctolaimus platypi sp. n. is described and figured. The third-stage dauer juveniles of M. platypi sp. n. were isolated from the underside of the elytra of the oak borer, Platypus quercivorus, and were reared on an Asparagine-Mannitol (A-M) agar. Specimens of adult nematodes for description and measurements were collected from a 2-week-old culture on A-M agar. The new species is characterised by having the stoma shorter than the pro-metacorpus, shape of the rounded-cylindroid pro-metacorpus, the obvious longitudinal striations on the cuticle, and thick cuticle. The male and female of the new species have a body length of ca 700-1000 μm, a value of ca 20, b value of ca 6, and c value of ca 10. Males of the new species have strongly arcuate, C-shaped spicules 71 (62-80) μm long, 29 (25-35) μm long gubernaculum with pointed distal end, and nine pairs of caudal papillae. There is no bursa. Ceratosolenus is proposed as a junior synonym of Myctolaimus and the following new combinations are also proposed: M. anoplophorae comb. n.; M. inevectus comb. n.; and M. racemosa comb. n.

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