Rice ragged stunt virus-induced apoptosis affects virus transmission from its insect vector, the brown planthopper to the rice plant

Huang, Hai‐Jian; Bao, Yan-Yuan; Lao, Shu-Hua; Huang, Xiao-Hui; Ye, Yi-Zhou; Wu, Ji; Xu, Haijun; Zhou, Xueping; Zhang, Chuan‐Xi

doi:10.1038/srep11413

Cited by 60 publications

(51 citation statements)

References 33 publications

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“…The lifespan of WBPHs carrying SRBSDV is less than 15 days at 25 °C45. Additionally, the salivary gland cells of BPHs infected by RRSV undergo programmed cell death46. These results indicate that infections by SRBSDV or RRSV were not favourable for the growth and development of WBPHs and BPHs, regardless of whether they are carrying a virus.…”

Section: Discussionmentioning

confidence: 90%

Virus altered rice attractiveness to planthoppers is mediated by volatiles and related to virus titre and expression of defence and volatile-biosynthesis genes

Zhang

et al. 2016

Sci Rep

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Viruses may induce changes in plant hosts and vectors to enhance their transmission. The white-backed planthopper (WBPH) and brown planthopper (BPH) are vectors of Southern rice black-streaked dwarf virus (SRBSDV) and Rice ragged stunt virus (RRSV), respectively, which cause serious rice diseases. We herein describe the effects of SRBSDV and RRSV infections on host-selection behaviour of vector and non-vector planthoppers at different disease stages. The Y-tube olfactometer choice and free-choice tests indicated that SRBSDV and RRSV infections altered the attractiveness of rice plants to vector and non-vector planthoppers. The attractiveness was mainly mediated by rice volatiles, and varied with disease progression. The attractiveness of the SRBSDV- or RRSV-infected rice plants to the virus-free WBPHs or BPHs initially decreased, then increased, and finally decreased again. For the viruliferous WBPHs and BPHs, SRBSDV or RRSV infection increased the attractiveness of plants more for the non-vector than for the vector planthoppers. Furthermore, we observed that the attractiveness of infected plants to planthoppers was positively correlated with the virus titres. The titre effects were greater for virus-free than for viruliferous planthoppers. Down-regulated defence genes OsAOS1, OsICS, and OsACS2 and up-regulated volatile-biosynthesis genes OsLIS, OsCAS, and OsHPL3 expression in infected plants may influence their attractiveness.

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Section: Discussionmentioning

confidence: 90%

Virus altered rice attractiveness to planthoppers is mediated by volatiles and related to virus titre and expression of defence and volatile-biosynthesis genes

Zhang

et al. 2016

Sci Rep

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“…Sample treatment procedures were carried out according to a method reported previously [30]. Ultrathin sections were examined with a JEX-1230 TEM (JEOL, Tokyo, Japan) at an accelerating voltage of 80 kV.…”

Section: Methodsmentioning

confidence: 99%

Forkhead box transcription factor L2 activates Fcp3C to regulate insect chorion formation

Pan

et al. 2017

Open Biol.

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Most animals are oviparous. However, the genes regulating egg shell formation remain not very clear. In this study, we found that Nilaparvata lugens Forkhead box transcription factor L2 (NlFoxL2) directly activated follicle cell protein 3C (NlFcp3C) to regulate chorion formation. NlFoxL2 and NlFcp3C had a similar expression pattern, both highly expressed in the follicular cells of female adults. Knockdown of NlFoxL2 or NlFcp3C also resulted in the same phenotypes: obesity and female infertility. RNA interference (RNAi) results suggested that NlFcp3C is a downstream gene of NlFoxL2. Furthermore, transient expression showed that NlFoxL2 could directly activate the NlFcp3C promoter. These results suggest that NlFcp3C is a direct target gene of NlFoxL2. Depletion of NlFoxL2 or NlFcp3C prevented normal chorion formation. Our results first revealed the functions of Fcp3C and FoxL2 in regulation of oocyte maturation in an oviparous animal.

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“…Strica is necessary for histolysis of salivary glands during metamorphosis and plays redundant roles in oogenesis in the ovaries (Baum et al, 2007). Similar research has been conducted on various insect species, including Bombyx mori (Zhang et al, 2010;Yi et al, 2014;Wang et al, 2016), Apis mellifera , Aedes albopictus Meng et al, 2016), Helicoverpa armigera (Yang et al, 2008), Spodoptera frugiperda (Huang et al, 2013), Nilaparvata lugens (Huang et al, 2015), Spodoptera littoralis (Liu et al, 2005) and Sitophilus oryzae (Eyraud et al, 2017). However, the function of the caspase gene in Bemisia tabaci is completely unknown.…”

Section: Introductionmentioning

confidence: 91%

The functions of caspase in whitefly Bemisia tabaci apoptosis in response to ultraviolet irradiation

Wang

Qian

et al. 2018

Insect Molecular Biology

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Whiteflies (Bemisia tabaci) are phloem feeders, and some invasive species are composed of cryptic species complexes that cause extensive crop damage, particularly via the direct transmission of plant viruses. Apoptosis is a type of programmed cell death essential for organismal development and tissue homeostasis. The caspases belong to a family of cysteine proteases that play a central role in the initiation of apoptosis in many organisms. Here, we employed a comprehensive genomics approach to identity caspases in B. tabaci Middle East Asia Minor 1 (MEAM1), an invasive whitefly that carries a cryptic species complex that is devastating to crops. Four caspase genes were identified, and their motif compositions were predicted. Structures were relatively conserved in both putative effector and initiator caspases. Expression patterns of caspase genes differed across insect developmental stages. Three caspase genes were induced immediately after ultraviolet (UV) treatment. Expression levels of Bt-caspase-1 and Bt-caspase-3b increased in the midgut and salivary glands during apoptosis induced by UV treatments, whereas silencing of both genes reduced UV-triggered apoptosis. Our study demonstrates that Bt-caspase-1 and Bt-caspase-3b, respectively, act as putative initiator and effector apoptotic caspases in the MEAM1 whitefly.

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Rice ragged stunt virus-induced apoptosis affects virus transmission from its insect vector, the brown planthopper to the rice plant

Cited by 60 publications

References 33 publications

Virus altered rice attractiveness to planthoppers is mediated by volatiles and related to virus titre and expression of defence and volatile-biosynthesis genes

Virus altered rice attractiveness to planthoppers is mediated by volatiles and related to virus titre and expression of defence and volatile-biosynthesis genes

Forkhead box transcription factor L2 activates Fcp3C to regulate insect chorion formation

The functions of caspase in whitefly Bemisia tabaci apoptosis in response to ultraviolet irradiation

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