scholarly journals Epiphytic Bacterium, Erwinia ananas, Commonly Isolated from Rice Plants and Brown Planthoppers (Nilaparvata lugens) in Hopperburn Patches

1996 ◽  
Vol 31 (3) ◽  
pp. 459-462 ◽  
Author(s):  
Kenji WATANABE ◽  
Hiromu KAWAKITA ◽  
Mamoru SATO
Keyword(s):  
Nilaparvata Lugens ◽  
Epiphytic Bacterium ◽  
Rice Plants ◽  
Erwinia Ananas

scholarly journals Ketahanan padi (Oryza sativa L.) varietas IPB 3S terhadap wereng batang cokelat (Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)

2020 ◽  
Vol 17 (2) ◽  
pp. 97
Author(s):  
Andi Nurdaaniyah ◽  
Dadang Dadang ◽  
I Wayan Winasa
Keyword(s):  
Sex Ratio ◽  
Insect Pests ◽  
Oryza Sativa L ◽  
Feeding Activity ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Population Increase ◽  
Rice Varieties ◽  
High Loss ◽  
Rice Plants

<p>Brown planthopper (<em>Nilaparvata lugens</em> (Stål)) is one of the major rice insect pests that is known to cause high loss of rice production. One of the strategies to control this pest is by using resistant rice varieties. The aim of this research was to study the resistance of IPB 3S variety to BPH by measuring BPH fecundity, sex ratio, feeding activity as well as population increase compared to Ciherang variety against brown planthopper (<em>N. lugens</em>). Fecundity test used a pair of BPH adult infested on 21 days after planting (DAP) of rice plants. Eggs laid in rice stalks and the rest of eggs in the ovary were counted. In order to know the change of sex ratio, a pair of BPH adults was infested on 30 DAP rice plants and allowed to lay eggs. The calculation of sex ratio was conducted at adult stage of BPH by segregation between male and female adults. Feeding activity of BPH was evaluated using ninhydrin and analyzed qualitatively using spectrophotometer. Ten fourth instar nymphs of BPH was infested on 30 DAP old of rice seedlings. Honeydew secreted by BPH was collected to filter paper sprayed with ninhydrin. Population increased test was conducted by infesting five pairs of BPH adults on 35 DAP old rice plants. Observations was conducted on nymph and adult stages. Each test was replicated 10 times. In general, IPB 3S is slightly resistant to BPH, compared to Ciherang variety. The feeding activity of BPH is higher in Ciherang compared to IPB3S. However, the fecundity and population increased of BPH in Ciherang is similar to IPB3S.</p>

β-Glucosidase treatment and infestation by the rice brown planthopper Nilaparvata lugens elicit similar signaling pathways in rice plants

2008 ◽  
Vol 53 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Xia Wang ◽  
GuoXin Zhou ◽  
CaiYu Xiang ◽  
MengHao Du ◽  
JiaAn Cheng ◽  
...  
Keyword(s):  
Signaling Pathways ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Plants

Imidacloprid-induced transference effect on some elements in rice plants and the brown planthopper Nilaparvata lugens (Hemiptera: Delphacidae)

2010 ◽  
Vol 18 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Samer Azzam ◽  
Fan Yang ◽  
Jin-Cai Wu ◽  
Jin Geng ◽  
Guo-Qing Yang
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Plants

Behavior of Erwinia ananas transformed with bioluminescence genes on rice plants

2003 ◽  
Vol 69 (4) ◽  
pp. 267-270 ◽  
Author(s):  
Masaru Hasegawa ◽  
Koji Azegami ◽  
Hiroyuki Yoshida ◽  
Hiroshi Otani
Keyword(s):  
Rice Plants ◽  
Erwinia Ananas

scholarly journals Salivary Protein NlSP7 of The Brown Planthopper Functions As An Effector for Mediating Tricin Metabolism in Rice Plants

2021 ◽  
Author(s):  
Gu Gong ◽  
Long-Yu Yuan ◽  
Yi-Feng Li ◽  
Hang-Xiang Xiao ◽  
Yan-Fang Li ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Food Intake ◽  
Rice Plant ◽  
Artificial Diet ◽  
Mrna Level ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Salivary Protein ◽  
Rice Plants ◽  
Important Pest

Abstract The brown planthopper (BPH), Nilaparvata lugens, is an important pest that affects rice (Oryza sativa) production in Asia. The flavone tricin (5,7,4ʹ-trihydroxy-3ʹ,5ʹ-dimethoxy flavone) is a valuable secondary metabolite commonly found in rice plants that can defend rice plants against infestation by BPH. BPH damage can reduce the metabolic level of tricin in rice. Our preliminary transcriptome research results showed that BPH salivary protein 7, NlSP7, is highly responsive to tricin stimuli. However, the function of NlSP7 in mediating the interaction between the rice plant and the BPH is unknown. In this study, we cloned the NlSP7 gene in N. lugens and found that its mRNA level was greater in the presence of high tricin content than low tricin content, regardless of whether the BPHs were fed a rice plant diet or an artificial diet containing 100 mg/L tricin. Knocking down NlSP7 resulted in BPH individuals spending more time in the non-penetration and pathway phase, and less time feeding on the phloem of rice plants. These changes decreased BPH food intake, feeding behavior, and fitness, as well as the tricin content of the rice plants. These findings demonstrate that the salivary protein NlSP7 of BPH functions as an effector for tricin metabolism in rice.

scholarly journals Synergism Between Southern rice black-streaked dwarf virus and Rice ragged stunt virus Enhances Their Insect Vector Acquisition

2014 ◽  
Vol 104 (7) ◽  
pp. 794-799 ◽  
Author(s):  
Shu Li ◽  
Han Wang ◽  
Guohui Zhou
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Plant Viruses ◽  
Dwarf Virus ◽  
Insect Vector ◽  
Sogatella Furcifera ◽  
Rice Plants ◽  
The Family ◽  
Low Incidence ◽  
Rice Ragged Stunt Virus

Southern rice black-streaked dwarf virus (SRBSDV), a tentative species in the genus Fijivirus, family Reoviridae, is a novel rice virus transmitted by the white-backed planthopper (Sogatella furcifera). Since its discovery in 2001, SRBSDV has spread rapidly throughout eastern and southeastern Asia and caused large rice losses in China and Vietnam. Rice ragged stunt virus (RRSV) (genus Oryzavirus, family Reoviridae) is a common rice virus vectored by the brown planthopper (Nilaparvata lugens). RRSV is also widely distributed in eastern and southeastern Asia but has not previously caused serious problems in China owing to its low incidence. With SRBSDV's spread, however, RRSV has become increasingly common in China, and is frequently found in co-infection with SRBSDV. In this study, we show that SRBSDV and RRSV interact synergistically, the first example of synergism between plant viruses in the family Reoviridae. Rice plants co-infected with both viruses displayed enhanced stunting, earlier symptoms, and higher virus titers compared with singly infected plants. Furthermore, white-backed and brown planthoppers acquired SRBSDV and RRSV, respectively, from co-infected plants at higher rates. We propose that increased RRSV incidence in Chinese fields is partly due to synergism between SRBSDV and RRSV.

scholarly journals Southern rice black-streaked dwarf virus Alters Insect Vectors' Host Orientation Preferences to Enhance Spread and Increase Rice ragged stunt virus Co-Infection

2014 ◽  
Vol 104 (2) ◽  
pp. 196-201 ◽  
Author(s):  
Han Wang ◽  
Donglin Xu ◽  
Lingling Pu ◽  
Guohui Zhou
Keyword(s):  
Host Preference ◽  
Southern China ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Plant Viruses ◽  
Dwarf Virus ◽  
Virus Spread ◽  
Sogatella Furcifera ◽  
Rice Plants ◽  
Rice Ragged Stunt Virus

In recent years, Southern rice black-streaked dwarf virus (SRBSDV), a tentative species in the genus Fijivirus (family Reoviridae), has spread rapidly and caused serious rice losses in eastern and southeastern Asia. With this virus spread, Rice ragged stunt virus (RRSV, genus Oryzavirus, family Reoviridae) became more common in southern China, usually in co-infection with the former. SRBSDV and RRSV are transmitted by two different species of planthoppers, white-backed planthopper (WBPH, Sogatella furcifera) and brown planthopper (BPH, Nilaparvata lugens), respectively, in a persistent, circulative, propagative manner. In this study, using a Y-shape olfactometer-based device, we tested the host preference of three types of macropterous WBPH adults for healthy or SRBSDV-infected rice plants. The results showed that virus-free WBPHs significantly preferred infected rice plants to healthy plants, whereas both the viruliferous and nonviruliferous WBPHs preferred healthy plants to infected plants. In additional tests, we found that the BPHs significantly preferred healthy plants when they were virus free, whereas RRSV-carrying BPHs preferred SRBSDV-infected rice plants. From these findings, we propose that plant viruses may alter host selection preference of vectors to enhance their spread and that of insects vectoring another virus to result in co-infection with more than one virus.

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