High temperature determines the ups and downs of small brown planthopper <i>Laodelphax striatellus</i> population

Liu, Xiangdong; Zhang, Aimin

doi:10.1111/j.1744-7917.2012.01533.x

Cited by 15 publications

(9 citation statements)

References 9 publications

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“…Temperature plays important roles in determining insect survival, development, reproduction and resistance [27,37,38]. Insects exhibit obviously physiological and behavioural responses to thermal stress [15,16,33,36].…”

Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analysis of the rice leaf folder (Cnaphalocrocis medinalis) to heat acclimation

Quan

Wang

et al. 2020

BMC Genomics

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Background: The rice leaf folder Cnaphalocrocis medinalis Güenée is a serious insect pest of rice in Asia. This pest occurs in summer, and it is sensitive to high temperature. However, the larvae exhibit heat acclimation/adaptation. To understand the underlying mechanisms, we established a heat-acclimated strain via multigenerational selection at 39°C. After heat shock at 41°C for 1 h, the transcriptomes of the heat-acclimated (S-39) and unacclimated (S-27) larvae were sequenced, using the unacclimated larvae without exposure to 41°C as the control. Results: Five generations of selection at 39°C led larvae to acclimate to this heat stress. Exposure to 41°C induced 1160 differentially expressed genes (DEGs) between the heat-acclimated and unacclimated larvae. Both the heatacclimated and unacclimated larvae responded to heat stress via upregulating genes related to sensory organ development and structural constituent of eye lens, whereas the unacclimated larvae also upregulated genes related to structural constituent of cuticle. Compared to unacclimated larvae, heat-acclimated larvae downregulated oxidoreductase activity-related genes when encountering heat shock. Both the acclimated and unacclimated larvae adjusted the longevity regulating, protein processing in endoplasmic reticulum, antigen processing and presentation, MAPK and estrogen signaling pathway to responsed to heat stress. Additionally, the unacclimated larvae also adjusted the spliceosome pathway, whereas the heat-acclimated larvae adjusted the biosynthesis of unsaturated fatty acids pathway when encountering heat stress. Although the heat-acclimated and unacclimated larvae upregulated expression of heat shock protein genes under heat stress including HSP70, HSP27 and CRYAB, their biosynthesis, metabolism and detoxification-related genes expressed differentially. Conclusions: The rice leaf folder larvae could acclimate to a high temperature via multigenerational heat selection. The heat-acclimated larvae induced more DEGs to response to heat shock than the unacclimated larvae. The changes in transcript level of genes were related to heat acclimation of larvae, especially these genes in sensory organ development, structural constituent of eye lens, and oxidoreductase activity. The DEGs between heat-acclimated and unacclimated larvae after heat shock were enriched in the biosynthesis and metabolism pathways. These results are helpful to understand the molecular mechanism underlying heat acclimation of insects.

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Section: Discussionmentioning

confidence: 99%

Comparative transcriptome analysis of the rice leaf folder (Cnaphalocrocis medinalis) to heat acclimation

Quan

Wang

et al. 2020

BMC Genomics

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“…These results indicate that temperature plays a more important role than rainfall in the survival and reproduction of SPBH. The optimum temperature for survival and reproduction of SBPH is about 25 °C and higher winter temperatures are apparently favorable for the overwintering of SBPH 54 , as supported by the positive correlation between mean temperature and overwintering SBPH density (Q 0 ) ( Table 6 ). In addition, winter temperature also alters SBPH feeding behavior with warmer winters enhancing feeding activity as indicated by the positive correlation between temperature and viruliferous population density of overwintering SBPH (QV 0 ).…”

Section: Discussionmentioning

confidence: 80%

Viruliferous rate of small brown planthopper is a good indicator of rice stripe disease epidemics

Zhan

Cheng

et al. 2016

Sci Rep

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Rice stripe virus (RSV), its vector insect (small brown planthopper, SBPH) and climatic conditions in Jiangsu, China were monitored between 2002 and 2012 to determine key biotic and abiotic factors driving epidemics of the disease. Average disease severity, disease incidence and viruliferous rate of SBPH peaked in 2004 and then gradually decreased. Disease severity of RSV was positively correlated with viruliferous rate of the vector but not with the population density of the insect, suggesting that the proportion of vectors infected by the virus rather than the absolute number of vectors plays an important role in RSV epidemics and could be used for disease forecasting. The finding of a positive correlation of disease severity and viruliferous rate among years suggests that local infection is likely the main source of primary inoculum of RSV. Of the two main climatic factors, temperature plays a more important role than rainfall in RSV epidemics.

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“…Although previous studies reported the effect of temperature on wing morphs differentiation in the rice planthoppers N. lugens (Zhang, 1983) and L. striatellus (Liu & Zhang, 2012), to date there are no studies referred to the possible role of endosymbionts on the determination of wing morphs in planthoppers. We consider that this topic is an interesting point to be evaluated in further studies.…”

Section: Discussionmentioning

confidence: 99%

Consequences of stress induced by heat on fitness ofDelphacodes kuscheliand its yeast‐like endosymbionts

Fuente

Maciá

Cano

et al. 2019

J Applied Entomology

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The planthopper Delphacodes kuscheli is the main vector of Mal de Río Cuarto virus in Argentina, disease that severely affects maize production. In this study, we investigated the effects of heat stress on fitness traits and on the number of its obligate yeast‐like symbionts (YLS). The exposition of newly‐hatched nymphs to 35°C for 3 days, a well‐known procedure used to reduce the number of YLS in planthoppers, was applied. To compare different fitness components between control and heat‐treated insects, we estimated nymphal instars development time, nymphal survival, adult body length, longevity, fecundity and fertility. Also, correlates of fitness, as proportion of sexes and wing forms of the emerging adults, were evaluated. In heat‐treated group, the nymphal developmental time increased due to an increase in the fifth instar duration, and the nymphal survival, body length of adults and fecundity were reduced when compared to control. There was a significant association between treatments (control and heat‐treated insects) and wing morphs. The heat treatment successfully reduced the number of YLS in third instar nymphs of D. kuscheli. Our results revealed the negative effect of heat stress on development, survival and reproduction of D. kuscheli and on the load of its YLS endosymbionts suggesting that YLS could play a crucial role in the development and reproduction of these planthoppers.

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High temperature determines the ups and downs of small brown planthopper Laodelphax striatellus population

Cited by 15 publications

References 9 publications

Comparative transcriptome analysis of the rice leaf folder (Cnaphalocrocis medinalis) to heat acclimation

Comparative transcriptome analysis of the rice leaf folder (Cnaphalocrocis medinalis) to heat acclimation

Viruliferous rate of small brown planthopper is a good indicator of rice stripe disease epidemics

Consequences of stress induced by heat on fitness ofDelphacodes kuscheliand its yeast‐like endosymbionts

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