Mating duration and spermatophore transfer in Cryptolaemus montrouzieri (Coccinellidae)

Lima, Carla Helena M DE; Nόbrega, Rafaella L.; Ferraz, Maria L.; Pontes, Wendel José Teles

doi:10.1007/s11756-021-00907-6

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…These differences occurred most likely because previous studies were conducted at constant temperatures. In mating behavior, the duration of copulation is frequently regarded as important for sex selection and has a significant impact on the adaptability of adult males and females (Linn et al, 2007;De-Lima et al, 2021). In this study, the prolonged duration of mating after exposure to shortterm high-temperature treatment might be related to the mating characteristics of Z. tau.…”

Section: Discussionmentioning

confidence: 76%

Effect of short-term exposure to high temperatures on the reproductive behavior and physiological enzyme activities in the fruit fly Zeugodacus tau (Walker)

Wei²,

Li³

et al. 2023

Front. Physiol.

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Zeugodacus tau is an economically important invasive pest of various vegetables and fruits. In this study, we evaluated the effects of short-term (12 h) exposure to high temperatures on the reproductive behaviors and physiological enzyme activities of adult Z. tau flies. When compared to the control group, the mating rate in the treated group increased significantly after exposure to 34°C and 38°C. After 34°C exposure, the mating rate of the control♀-treated♂ mating was the highest (60.0%). The use of high temperatures for a short period reduced the pre-mating period and lengthened the duration of copulation. After 38°C exposure, the mating between treated♀ and treated♂ had the shortest pre-mating period of 39.0 min and the longest copulation duration of 67.8 min. Mating after a brief exposure to high temperatures had a negative impact on female reproduction, whereas mating with males who previously had a brief exposure to 34°C and 38°C significantly increased female fecundity. After 40 °C exposure, the mating between treated♀ and control♂ showed the lowest fecundity and hatching rate of 293.25 eggs and 25.71%, respectively. The mating between control♀ and treated♂ showed the highest fecundity of 1,016.75 eggs after exposure to 38°C. The SOD, POD, and CAT activities exhibited significant changes (increase or decrease) after the short-term exposure of Z. tau adults to high temperatures. After being exposed to 38°C, SOD activity increased by 2.64 and 2.10 times in females and males in the treated group, respectively, compared to the SOD activity in the control group. The AchE, CarE, and GST activities first increased and then decreased with the increase in temperature. CarE activity changed the most after exposure to 38°C, with females and males in the treated group increasing by 7.81 and 1.69 times, respectively, compared to the activity in the control group. In conclusion, mating strategy and physiological stress are important adaptive mechanisms of Z. tau for adapting to short-term heat stress in a sex-specific manner.

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Section: Discussionmentioning

confidence: 76%

Effect of short-term exposure to high temperatures on the reproductive behavior and physiological enzyme activities in the fruit fly Zeugodacus tau (Walker)

Wei²,

Li³

et al. 2023

Front. Physiol.

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“…This could indicate an increased investment of male insects in subsequent reproduction after being exposed to high-temperature stress conditions. In certain species of insects, the amount of sperm transferred during copulation is proportional to the duration of mating, while the same is not true for other species (De-Lima et al, 2021). Therefore, the dynamics of sperm transfer during copulation after heat stress in Z. tau warrants further investigation.…”

Section: Discussionmentioning

confidence: 95%

Effect of short-term exposure to high temperatures on reproductive behaviors and physiological enzyme activities in Zeugodacus tau

Wei

et al. 2022

Preprint

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Zeugodacus tau is an economically important invasive pest of various vegetables and fruits. The present study evaluated the effects of short-term (12 h) exposure to high temperatures on the reproductive behaviors and physiological enzyme activities of Z. tau insects. It was observed that the mating rate in the treatment group increased significantly at temperatures of 34 °C and 38 °C compared to the control. The highest mating rate of the control♀-treatment♂ mating was 60.00%, which occurred at 34 °C, while no mating occurred until 24 h, at 42 °C. Moreover, the short-term application of high temperatures reduced the pre-mating period and prolonged the duration of copulation. The treatment♀-treatment♂ mating had the shortest pre-mating period of 39.00 min and the longest copulation duration of 678.00 min at 38 °C. Mating after the short-term application of high temperature exerted adverse effects on the reproduction of females, while mating with males exposed at 34 °C and 38 °C significantly increased female fecundity. At 40 °C, the treatment♀-control♂ mating presented the lowest fecundity and hatching rate of 293.25 eggs and 25.71%, respectively. The control♀-treatment♂ presented the highest fecundity of 1016.75 eggs at 38 °C. Furthermore, the SOD, POD, and CAT activities exhibited significant changes (increase or decrease) after the short-term exposure of insects to high temperatures. The SOD activity changed the most at 38 °C, with the females and males exhibiting 3.64 times and 3.10 times the SOD activity, respectively, compared to control. The AchE, CarE, and GST activities first increased and then decreased with the increase in temperature. The CarE activity changed the most at 38 °C, with the females and males exhibiting 7.81 times and 1.69 times increased activities, respectively. In conclusion, mating strategy and physiological stress are important adaptive mechanisms of Z. tau under short-term heat stress, and the adaptation is sex-specificity.

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Sast1‐mediated manifold effects inhibit Plutella xylostella fertility

Cao,

Zou,

Liu

et al. 2024

Pest Management Science

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BACKGROUNDPlutella xylostella (Linnaeus) is a destructive pest of cruciferous crops due to its strong reproductive capacity and extensive resistance to pesticides. Seminal fluid proteins (SFPs) are the main effective factors that determine the reproductive physiology and behaviour of both sexes. Although an increasing number of SFPs have been identified, the effects of astacins in SFPs on agricultural pests have not yet been reported. Here, we elucidated the mechanisms by which Sast1 (seminal astacin 1) regulates the fertility of Plutella xylostella (L.).RESULTSPxSast1 was specifically expressed in the testis and accesssory gland. CRISPR/Cas9‐induced PxSast1 knockout successfully constructed two homozygous mutant strains. Sast1 impaired the fertility of P. xylostella by separately regulating the reproductive capacity of males and females. Loss of PxSast1, on the one hand, significantly decreased the ability of males to mate and fertilize, mainly manifested as shortened mating duration, reduced mating competitiveness and decreased eupyrene sperm production; on the other hand, it significantly inhibited the expression of chorion genes in females, resulting in oogenesis deficits. Simultaneously, for mated females, the differentially expressed genes in signalling pathways related to oogenesis and chorion formation were significantly enriched after PxSast1 knockout.CONCLUSIONThese analyses of the functions of PxSast1 as the regulator of spermatogenesis and oogenesis establish its importance in the fertility process of P. xylostella, as well as its potential as a promising target for genetic regulation‐based pest control. © 2024 Society of Chemical Industry.

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Mating duration and spermatophore transfer in Cryptolaemus montrouzieri (Coccinellidae)

Cited by 6 publications

References 35 publications

Effect of short-term exposure to high temperatures on the reproductive behavior and physiological enzyme activities in the fruit fly Zeugodacus tau (Walker)

Effect of short-term exposure to high temperatures on the reproductive behavior and physiological enzyme activities in the fruit fly Zeugodacus tau (Walker)

Effect of short-term exposure to high temperatures on reproductive behaviors and physiological enzyme activities in Zeugodacus tau

Sast1‐mediated manifold effects inhibit Plutella xylostella fertility

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