Spectrum-Specific Uv Egg Damage and Dispersal Responses in the Phytoseiid Predatory Mite<i>Neoseiulus californicus</i>(Acari: Phytoseiidae)

Tachi, Fuyuki; Osakabe, Masahiro

doi:10.1603/en13336

Cited by 25 publications

(20 citation statements)

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“…Previous studies have indicated that photoperiod has a significant effect on development and reproduction of Neoseiulus barkeri [115], and harmful/harmless UV wavelength may influence decision making in foraging phytoseiid mites ( Neoseiulus californicus ) [116]. Eyeless phytoseiid mites can perceive and respond to light, including UV radiation [39].…”

Section: Resultsmentioning

confidence: 99%

Genomic insights into mite phylogeny, fitness, development, and reproduction

et al. 2019

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BackgroundPredatory mites (Acari: Phytoseiidae) are the most important beneficial arthropods used in augmentative biological pest control of protected crops around the world. However, the genomes of mites are far less well understood than those of insects and the evolutionary relationships among mite and other chelicerate orders are contested, with the enigmatic origin of mites at one of the centres in discussion of the evolution of Arachnida.ResultsWe here report the 173 Mb nuclear genome (from 51.75 Gb pairs of Illumina reads) of the predatory mite, Neoseiulus cucumeris, a biocontrol agent against pests such as mites and thrips worldwide. We identified nearly 20.6 Mb (~ 11.93% of this genome) of repetitive sequences and annotated 18,735 protein-coding genes (a typical gene 2888 bp in size); the total length of protein-coding genes was about 50.55 Mb (29.2% of this assembly). About 37% (6981) of the genes are unique to N. cucumeris based on comparison with other arachnid genomes. Our phylogenomic analysis supported the monophyly of Acari, therefore rejecting the biphyletic origin of mites advocated by other studies based on limited gene fragments or few taxa in recent years. Our transcriptomic analyses of different life stages of N. cucumeris provide new insights into genes involved in its development. Putative genes involved in vitellogenesis, regulation of oviposition, sex determination, development of legs, signal perception, detoxification and stress-resistance, and innate immune systems are identified.ConclusionsOur genomics and developmental transcriptomics analyses of N. cucumeris provide invaluable resources for further research on the development, reproduction, and fitness of this economically important mite in particular and Arachnida in general.

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Section: Resultsmentioning

confidence: 99%

Genomic insights into mite phylogeny, fitness, development, and reproduction

et al. 2019

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“…Second, we analyzed the peak area detected at a wavelength of 300 nm by high-performance liquid chromatography (HPLC; L-7420 UV-Vis detector; Hitachi High-Tech Science Co., Tokyo, Japan) using a reverse-phase column (6 × 100 mm, 5 µm; YMC-Pack ODS-AQ311; YMC Co., Ltd., Kyoto, Japan). UV at 300 nm and shorter wavelengths kill N. californicus eggs, whereas UV at 310 nm and longer wavelengths do not (Tachi and Osakabe, 2014). The mobile phase was eluted with a gradient from 0.1% acetic acid/15% methanol to 0.1% acetic acid/70% methanol between 0-40 min, and isocratic 0.1% acetic acid/99.9% methanol between 40-50 min.…”

Section: Uvb Absorbing Capacitymentioning

confidence: 99%

A Pollen Diet Confers Ultraviolet-B Resistance in Phytoseiid Mites by Providing Antioxidants

et al. 2018

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Many plant-dwelling mites including phytophagous spider mites and predacious phytoseiid mites suffer lethal deleterious effects from solar ultraviolet-B (UVB; 280-315 nm wavelength) radiation. Phytoseiid species also often feed on pollen as an alternative food source. As pollen is frequently exposed to solar radiation, it is likely to contain compounds that protect germ cells from UVB radiation and radiant heat. If phytoseiid mites can obtain these protective compounds, pollen feeding may play a role in their adaptation to UVB. In this study, we compared the potential protective effects of tea pollen, peach pollen, and Tetranychus urticae mites as food items in Neoseiulus californicus. Egg hatchability and adult female survival after UVB irradiation were higher in pollen-fed than mite-fed N. californicus. The major protective effects of peach pollen and tea pollen were UVB shielding effects and antioxidant capacity, respectively, and these were derived from distinctive antioxidant components. The major antioxidant in peach pollen was trip -coumaroylspermidine, although its antioxidant capacity was relatively low; instead, it effectively absorbed UVB radiation. By contrast, the major antioxidants of tea pollen were catechin and epicatechin 3-gallate, which had high antioxidant capacities. Our results indicate that the protective antioxidant components in pollen improved UVB resistance in N. californicus, contributing to their adaptation to solar radiation.

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“…Tetranychus urticae and P. citri distributions, mostly on lower and upper leaf surfaces, respectively (Tachi & Osakabe, ), have been associated with their different sensitivity to UV radiation (Ohtsuka & Osakabe, ; Fukaya et al ., ; Suzuki et al ., ; Ghazy et al ., ). Therefore, differences in the time of day at which predation occurred could be related to the position of the preferred prey and/or their different UV sensitivity, such as P. persimilis being less UV sensitive than N. californicus (Tachi & Osakabe, , ; Ghazy et al ., ). Accordingly, our results show that the latter preferentially preyed early in the morning and late in the evening in summer and winter, respectively (Table ).…”

Section: Discussionmentioning

confidence: 97%

When do predatory mites (Phytoseiidae) attack? Understanding their diel and seasonal predation patterns

et al. 2017

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Predatory mites of the Phytoseiidae family are considered one of the most important groups of natural enemies used in biological control. The behavioral patterns of arthropods can differ greatly daily and seasonally; however, there is a lack of literature related to Phytoseiidae diel and seasonal predation patterns. The predatory activity of three phytoseiid species (two Tetranychidae-specialists, Phytoseiulus persimilis and Neoseiulus californicus, and one omnivore, Euseius stipulatus) that occur naturally in Spanish citrus orchards was observed under laboratory conditions in winter and summer. The temperature and photoperiod of the climatic chamber where the mites were reared did not change during the experiment. Our study demonstrates that phytoseiids can exhibit diel and seasonal predatory patterns when feeding on Tetranychus urticae (Acari: Tetranychidae). Neoseiulus californicus was revealed to be a nocturnal predator in summer but diurnal in winter. In contrast, P. persimilis activity was maximal during the daytime, and E. stipulatus showed no clear daily predation patterns. The predatory patterns described in this study should be taken into account when designing laboratory studies and also in field samplings, especially when applying molecular techniques to unveil trophic relationships.

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Spectrum-Specific Uv Egg Damage and Dispersal Responses in the Phytoseiid Predatory MiteNeoseiulus californicus(Acari: Phytoseiidae)

Cited by 25 publications

References 40 publications

Genomic insights into mite phylogeny, fitness, development, and reproduction

Genomic insights into mite phylogeny, fitness, development, and reproduction

A Pollen Diet Confers Ultraviolet-B Resistance in Phytoseiid Mites by Providing Antioxidants

When do predatory mites (Phytoseiidae) attack? Understanding their diel and seasonal predation patterns

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