Behavioural adaptation of the rice leaf folder Cnaphalocrocis medinalis to short-term heat stress

Bodlah, Muhammad Adnan; Gu, Ling-Ling; Tan, Ye; Liu, Xiangdong

doi:10.1016/j.jinsphys.2017.05.004

Cited by 18 publications

(12 citation statements)

References 58 publications

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“…Survival rate of the first-instar larvae is more than 60% when exposed to 39°C, but it is only 20% at 41°C [28]. Moreover, high temperature affects host preference and shelter-building behaviour of the rice leaf folder larvae [11,32,33]. The longevity and copulation frequency of adults, and hatchability of eggs are significantly reduced when adults exposed to 39°C or 40°C [27].…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…Ectotherms do not maintain constant body temperature, as they apply behavioural, physiological, and cellular adjustments to maintain thermal homeostasis (Bicego et al ., 2007; Bodlah et al ., 2017; Green et al ., 2019). Extreme high temperature plays a major role in affecting ectotherms (Ma et al ., 2018; Cherif et al ., 2019; Zhao et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

Differential thermal tolerance across life stages under extreme high temperatures crossed with feeding status in corn leaf aphid

Chen

Quan

Verheggen

et al. 2020

Ecological Entomology

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1. Climate change is expected to increase the frequency and duration of extreme heat events, which would pose significant challenges to most ectotherm species, such as insects. 2. In the study, we address the thermal tolerance of corn leaf aphid, Rhopalosiphummaidis (Hemiptera: Aphididae) under brief extreme high‐temperature events (i.e. heat waves) across life stages. Immature instars and adults of R. maidis were exposed to heat events of increasing temperatures (0.5 °C min−1), starting at 22 °C and reaching one of the selected maximal temperatures (from 38.5 to 44.5 °C with an increased interval of 0.5 °C). In each temperature regime, the mortality of R. maidis was compared with and without barley seedlings. 3. Results showed that the critical high temperature (CHT) of R. maidis was 39.0 °C in no feeding treatments, while it was 39.5 °C in feeding treatments. The upper lethal temperatures (ULTs) of R. maidis were significantly different between feeding and no feeding treatments. In addition, the ULTs varied significantly across life stages with the highest ULT values for 4th instars. Feeding significantly increased the thermal tolerance of phytophagous insects. 4. Variable balances in plant‐herbivore interactions will be induced according to the insect feeding diet status and instar stage when experiencing extreme temperatures resulting from the warming climate. The findings will provide valuable information for understanding the role of food intake in thermal adaptation of small arthropods to extreme high‐temperature events under climate change.

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“…Brown planthoppers in rice fields, for instance, have been shown to increase due to global warming (Ali et al, ). Even when dramatic variations occur, insect pests can respond quickly and dramatically to factors influencing their growth and development (Bale et al, ) and can adjust to unfavourable conditions through several ecological strategies in response to the degree and frequency of high‐temperature situations (Bodlah, Gu, Ye, & Liu, ).…”

Section: Discussionmentioning

confidence: 99%

Increased temperature induces leaffolder outbreak in rice field

Ali

Kabir

Afrin

et al. 2019

J Applied Entomology

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The rice leaffolder, Cnaphalocrosis medinalis Güenée (Lepidoptera: Crambidae), has emerged as a serious pest with significant outbreaks over the last decade in several rice‐growing countries, including China and Bangladesh and resulting in heavy rice yield losses. Climate changes (particularly high temperatures in late winter in Bangladesh) coincide with upsurge in outbreaks of this pest. We generated a statistical model using more than two decades of data to show that increased temperatures associate with this upsurge. Over the 22‐year model period, leaffolder populations in November increased significantly, corresponding to significant monthly temperature trends (but not rainfall) over the same period. Utilizing a linear model, we find that increasing temperature interacts with the amount of rainfall. With the variable month as a proxy for all seasonal effects affecting leaffolder abundance, the model reveals a significant correspondence with climate variations compared to average conditions; specifically, the model predicts that increasing maximum temperatures will lead to more leaffolder, while more rain will decrease their abundance. This study suggests that warmer environment contributed to recent outbreaks of leaffolder in rice‐growing countries; thus, climate change increases rice yield losses by increasing pest population in the field.

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Behavioural adaptation of the rice leaf folder Cnaphalocrocis medinalis to short-term heat stress

Cited by 18 publications

References 58 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

Differential thermal tolerance across life stages under extreme high temperatures crossed with feeding status in corn leaf aphid

Increased temperature induces leaffolder outbreak in rice field

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