Consequences of elevated temperature on the biology, predation, and competitiveness of two mirid predators in the rice ecosystem

Bai, Ye; Quais, Khairul; Zhou, Wenwu; Zhu, Zhiliang

doi:10.1007/s10340-021-01414-y

Cited by 11 publications

(7 citation statements)

References 72 publications

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“…Variability in temperature conditions can directly affect the physiology, survival, fecundity, behavior, and other characteristics of insects (Harrison et al, 2012;González-Tokman et al, 2020), ultimately affecting population dynamics (Bai et al, 2022). The development rate of insects is temperaturedependent (Bai et al, 2022), and the developmental duration of Orius can be significantly affected by this abiotic factor. Consistent with these findings, our results showed that temperature had a significant effect on the developmental duration of O. strigicollis.…”

Section: Discussion E Ect Of Temperature On the Development And Fecun...mentioning

confidence: 99%

“…Temperature strongly affects the predation ability of predaceous insects, as frequently confirmed by the functional response (Sørensen et al, 2013;Ge et al, 2018;Rehman et al, 2020;Bai et al, 2022). As the temperature increases within a tolerable temperature range, physiological metabolism increases, and predators consume more prey to meet these energetic demands (Schwarz and Frank, 2019;González-Tokman et al, 2020).…”

Section: E Ects Of Temperature On the Predation Rates Of O Strigicollismentioning

confidence: 91%

“…Temperature is an important environmental factor that influences both the biological and ecological characteristics of natural enemies (Wallner, 1987;Sørensen et al, 2013;Helgadóttir et al, 2017) as well as the effectiveness of biological control (Montserrat et al, 2013;Boukal et al, 2019;Bai et al, 2022). In mass-rearing programs, natural enemies are reared indoors at an optimum and constant temperature to ensure rapid and efficient production, but these conditions considerably differ from those of crop systems in the field or greenhouse (Montserrat et al, 2013;Sørensen et al, 2013;Helgadóttir et al, 2017), in which temperatures change with seasonal oscillations and diel activity rhythms.…”

Section: Introductionmentioning

confidence: 99%

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Linking life table and predation rate for evaluating temperature effects on Orius strigicollis for the biological control of Frankliniella occidentalis

Ren

Huang

et al. 2022

Front. Sustain. Food Syst.

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IntroductionOrius spp. are generalist predators released in horticultural and agricultural systems to control thrips. Understanding the effects of temperature on the development, predation rate, and population dynamics of Orius is essential for identifying the optimal timing of Orius release for establishing an adequate population to facilitate synchrony with thrips population growth and to prevent thrips outbreaks. The biological control efficiency of natural enemies as well as predator–prey relationships can be precisely described by integrating life table parameters and the predation rate.MethodsIn this study, the demographic features of Orius strigicollis fed on 2nd instar nymphs of western flower thrips (WFT), Frankliniella occidentalis, were compared at 18.5, 23.5, 27, and 33°C using the TWOSEX-MSChart program. The CONSUME-MSChart program was used to examine predation rates under different temperatures (18.5, 23.5, and 27°C).ResultsThe results showed no significant difference in fecundity among those reared at 18.5, 23.5, and 27°C, but fecundity at these temperatures was significantly higher than that at 33°C. The intrinsic rate of increase (r), finite rate of increase (λ), and net reproduction rate (R0) were the highest at 27°C. The net predation rate (C0) and transformation rate (Qp) were significantly higher at 18.5°C (C0 = 168.39 prey/predator, Qp = 8.22) and 23.5°C (C0 = 140.49 prey/predator, Qp = 6.03) than at 27°C (C0 = 138.39 prey/predator, Qp= 3.81); however, the finite predation rate (ω) showed the opposite trend. In addition to temperature, the stage of O. strigicollis at release can affect population dynamics.DiscussionOur study showed that temperature influenced the demographic traits and predation rates of O. strigicollis. When planning a release, the stage of O. strigicollis and temperature should be taken into account to establish an adequate population for the control of WFT.

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Section: Discussion E Ect Of Temperature On the Development And Fecun...mentioning

confidence: 99%

Section: E Ects Of Temperature On the Predation Rates Of O Strigicollismentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Linking life table and predation rate for evaluating temperature effects on Orius strigicollis for the biological control of Frankliniella occidentalis

Ren

Huang

et al. 2022

Front. Sustain. Food Syst.

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“…3 Temperatures outside of their developmental thresholds can accelerate the developmental time, shorten longevity, and decrease fecundity of insects. 4 Insects can cope with these challenges by changing their behavior, for example, seeking cooler environments, [5][6][7] or via physiological mechanisms such as the activation of antioxidant defenses, 8 or the accumulation of polyols, 9 proteins, 10,11 and amino acids. 12 When insects cannot regulate their body temperature through behavioral strategies, they must rely on physiological mechanisms, 13 which impacts on their population abundance and geographical distribution.…”

Section: Introductionmentioning

confidence: 99%

Heat shock protein 70 and Cathepsin B genes are involved in the thermal tolerance of Aphis gossypii

Liu

et al. 2023

Pest Management Science

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BACKGROUND: Elevated temperature can directly affect the insect pest population dynamics. Many experimental studies have indicated that high temperatures affect the biological and ecological characteristics of the widely distributed crop pest Aphis gossypii, but the molecular mechanisms underlying its response to heat stress remain unstudied. Here, we used transcriptomic analysis to explore the key genes and metabolic pathways involved in the regulation of thermotolerance in A. gossypii at 29 °C, 32 °C, and 35 °C. RESULTS:The results of bioinformatics analysis show that few genes were consistently differentially expressed among the higher temperature treatments compared to 29 °C, and a moderate temperature increase of 3 °C can elicit gene expression changes that help A. gossypii adapt to warmer temperatures. Based on KEGG pathway enrichment analysis, we found that genes encoding four heat shock protein 70 s (Hsp70s) and nine cathepsin B (CathB) proteins were significantly upregulated at 35 °C compared with 32 °C. Genes related to glutathione production were also highly enriched between 32 °C and 29 °C. Silencing of two Hsp70s (ApHsp70A1-1 and ApHsp68) and two CathBs (ApCathB01 and ApCathB02) with RNA interference using a nanocarrier-based transdermal dsRNA delivery system significantly increased sensitivity of A. gossypii to high temperatures. CONCLUSION: A. gossypii is able to fine-tune its response across a range of temperatures, and Hsp70 and CathB genes are essential for adaption of A. gossypii to warmer temperatures.

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“…It feeds on BPH eggs and nymphs, thus effectively controlling the BPH population and playing an important role in BPH biological control ( Matsumura et al, 2005 ; Sigsgaard, 2007 ; Preetha et al, 2010 ; Liu et al, 2018 ). However, with the acceleration of global warming, thermal stress is weakening the fitness and predatory capacity of C. lividipennis ( Bai et al, 2022 ). Therefore, it is urgently required to investigate how C. lividipennis reacts to heat stress such as identifying the key resistance effectors to increase its survival rate under heat stress and improve its predation performance.…”

Section: Introductionmentioning

confidence: 99%

Alkaline ceramidase (ClAC) inhibition enhances heat stress response in Cyrtorhinus lividipennis (Reuter)

et al. 2023

Self Cite

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Ceramidases (CDases) are vital sphingolipid enzymes involved in organismal growth and development. They have been reported as key mediators of thermal stress response. However, whether and how CDase responds to heat stress in insects remain unclear. Herein, we identified two CDase genes, C. lividipennis alkaline ceramidase (ClAC) and neutral ceramidase (ClNC), by searching the transcriptome and genome databases of the mirid bug, Cyrtorhinus lividipennis, an important natural predator of planthoppers. Quantitative PCR (qPCR) analysis showed that both ClNC and ClAC were highly expressed in nymphs than in adults. ClAC was especially highly expressed in the head, thorax, and legs, while ClNC was widely expressed in the tested organs. Only the ClAC transcription was significantly affected by heat stress. Knocking down ClAC increased the C. lividipennis nymph survival rate under heat stress. The transcriptome and lipidomics data showed that the RNA interference-mediated suppression of ClAC significantly upregulated the transcription level of catalase (CAT) and the content of long-chain base ceramides, including C16-, C18-, C24-, and C31- ceramides. In C. lividipennis nymphs, ClAC played an important role in heat stress response, and the upregulation of nymph survival rate might be caused by variation in the ceramide levels and transcriptional changes in CDase downstream genes. This study improves our understanding of the physiological functions of insect CDase under heat stress and provides valuable insights into the nature enemy application.

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Consequences of elevated temperature on the biology, predation, and competitiveness of two mirid predators in the rice ecosystem

Cited by 11 publications

References 72 publications

Linking life table and predation rate for evaluating temperature effects on Orius strigicollis for the biological control of Frankliniella occidentalis

Linking life table and predation rate for evaluating temperature effects on Orius strigicollis for the biological control of Frankliniella occidentalis

Heat shock protein 70 and Cathepsin B genes are involved in the thermal tolerance of Aphis gossypii

Alkaline ceramidase (ClAC) inhibition enhances heat stress response in Cyrtorhinus lividipennis (Reuter)

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