scholarly journals Relationship between the distribution of Pinus densiflora Sieb. et Zucc. seedlings, saplings, and juveniles and site conditions in a pine wilt disease forest

2010 ◽  
Vol 36 (2) ◽  
pp. 304-310 ◽  
Author(s):  
Chuping WU ◽  
Makoto ANDO
Keyword(s):  
Pinus Densiflora ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Site Conditions ◽  
Pine Wilt

Inhibition response of Pinus densiflora clones to Bursaphelenchus xylophilus systemic dispersal and their resistance to pine wilt disease

Nematology ◽  
2011 ◽  
Vol 13 (6) ◽  
pp. 653-659 ◽  
Author(s):  
Katsumi Togashi ◽  
Hiroko Maezono ◽  
Koji Matsunaga ◽  
Satoshi Tamaki
Keyword(s):  
Pinus Densiflora ◽  
Resistance Mechanism ◽  
Pine Wilt Disease ◽  
Bursaphelenchus Xylophilus ◽  
Wilt Disease ◽  
Pine Wilt ◽  
Inhibition Response ◽  
The Mean ◽  
The Relationship ◽  
Clone Group

AbstractTo determine the relationship between resistance to pine wilt disease and the inhibition of nematode systemic dispersal in Pinus densiflora, a suspension of 200 Bursaphelenchus xylophilus was placed on the upper cut end of 5-cm-long, living or boiled branch sections of 17 clones of pine that had different resistance levels. Significantly more nematodes passed through boiled sections than living sections during 24 h. Living branches of the resistant P. densiflora clone group significantly suppressed the dispersal of B. xylophilus compared with those of the susceptible group, suggesting that the inhibition of nematode systemic dispersal was involved in the resistance mechanism of selected disease-resistant pine clones. However, there was no significant correlation between the resistance class and the mean number of nematodes passing through live branch sections within the resistant clone group. The reason for the lack of correlation is discussed in relation with the resistance mechanism.

scholarly journals Effect of site conditions to the incidence of pine wilt disease.

2001 ◽  
Vol 27 (1) ◽  
pp. 108-113 ◽  
Author(s):  
Naoko Miki ◽  
Keiji Sakamoto ◽  
Takashi Nishimoto ◽  
Ken Yoshikawa ◽  
Yoshio Hada
Keyword(s):  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Site Conditions ◽  
Pine Wilt

scholarly journals Seasonal Changes of Leaf-fall in Pinus densiflora Forests Damaged by Pine Wilt Disease

1998 ◽  
Vol 24 (3-4) ◽  
pp. 153-161
Author(s):  
Yutaka IWASAKI ◽  
Keiji SAKAMOTO ◽  
Ken YOSHIKAWA ◽  
Kyozo CHIBA
Keyword(s):  
Seasonal Changes ◽  
Pinus Densiflora ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Leaf Fall ◽  
Pine Wilt

De novo assembly and transcriptome analysis of the Pinus densiflora response to pine wilt disease in nature

2018 ◽  
Vol 12 (3) ◽  
pp. 229-236 ◽  
Author(s):  
Il Hwan Lee ◽  
Jinjoong Kim ◽  
Kwan-Soo Woo ◽  
Kyung-Hwan Jang ◽  
Yun-Hee Kim ◽  
...  
Keyword(s):  
Transcriptome Analysis ◽  
De Novo Assembly ◽  
De Novo ◽  
Pinus Densiflora ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Pine Wilt

scholarly journals Carbon and Nitrogen Responses in Litterfall and Litter Decomposition in Red Pine (Pinus densiflora S. et Z.) Stands Disturbed by Pine Wilt Disease

Forests ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 244 ◽  
Author(s):  
Choonsig Kim ◽  
Seongjun Kim ◽  
Gyeongwon Baek ◽  
A-Ram Yang
Keyword(s):  
Litter Decomposition ◽  
Pinus Densiflora ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Red Pine ◽  
Disturbance Intensity ◽  
Pine Wilt ◽  
Needle Litter ◽  
Decomposition Processes ◽  
C And N

Research Highlight: Forest disturbance by insects or disease can have a significant influence on nutrient return by litterfall and decomposition, but information regarding disturbance gradients is scarce. This study demonstrated that the disturbance intensity caused by pine wilt disease greatly altered the quality and quantity of carbon (C) and nitrogen (N) in litterfall components and decomposition processes. Background and Objectives: This study was conducted to evaluate the C and N status of litterfall and litter decomposition processes in a natural red pine (Pinus densiflora S. et Z.) stand disturbed by pine wilt disease in southern Korea. Nine red pine plots with varying degrees of disturbance caused by pine wilt disease were established based on differences in the stand basal area. Litterfall and the decomposition of needle litter and branches under different degrees of disturbance were measured for three years. Results: There was a significant correlation (p < 0.05) between disturbance intensity and the C and N concentration of litterfall components depending on the time of sampling. The annual C and N inputs through litterfall components decreased linearly with decreasing disturbance intensities. The decomposition rates of branches were higher in slightly disturbed plots compared with severely disturbed plots for the late stage of branch decomposition, whereas the decomposition rates of needle litter were not affected by the disturbance intensity of pine wilt disease. Carbon and N concentrations from needle litter and branches were not linearly related to the intensities of disturbance, except for the initial stage (one year) of needle litter decomposition. Conclusions: The results indicated that the incidence of pine wilt disease was a major cause of C and N loss through litterfall and decomposition processes in pine wilt disease disturbed stands, but the magnitude of loss depended on the severity of the disease disturbance.

scholarly journals Enhanced Emission of Monoterpene 3-Carene in Pinus densiflora Infected by Pine Wood Nematode and Characterization of 3-Carene Synthase

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 514
Author(s):  
Hwan-Su Hwang ◽  
Jung-Yeon Han ◽  
Yong-Eui Choi
Keyword(s):  
Transgenic Tobacco ◽  
Pinus Densiflora ◽  
Northeast Asia ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Pcr Analysis ◽  
Pine Wood Nematode ◽  
Pine Wood ◽  
Plant Volatile ◽  
Pine Wilt

Pinus densiflora is an important pine species in Northeast Asia due to its historical, cultural, and economic values. Pine wood nematode (PWN) seriously damages P. densiflora, causing the pine wilt disease (PWD). Changes of phyto-compounds in resin and monoterpenes in P. densiflora after infection of PWN were studied. The changes were identified by GC-MS in control and infected P. densiflora. Among the resin phytochemicals (in P. densiflora), 3-carene was distinctly enhanced after PWN inoculation. The emitted plant volatile monoterpenes were analyzed by HS-SPME/GC-MS. It was observed that the amount of 3-carene enhanced conspicuously after infection of PWNs in both P. densiflora and P. koraiensis at 9.7 and 54.7 times, respectively. 3-Carene synthase gene (Pd3-cars) of P. densiflora was isolated and functionally characterized by transgenic tobacco overexpressing Pd3-cars. Integration and expression of transgenic tobacco were confirmed by genomic and RT-PCR analysis. The Pd3-cars gene was expressed in transgenic tobacco plants. Furthermore, the production of 3-carene was identified by HS-SPME/GC-MS analysis as the volatile compounds emitted from leaves of transgenic tobacco. Treatment of 3-carene to PWNs showed a mild nematicidal activity with 45.98% mortality at the concentration of 10 mg/mL. The current findings may apply to the early diagnosis of pine wilt disease infected by PWNs through enhanced emission of 3-carene.

Sign in / Sign up

Export Citation Format

Share Document