GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Elevated Carbon Dioxide Levels Decreases Cucumber Mosaic Virus Accumulation in Correlation with Greater Accumulation of rgs-CaM, an Inhibitor of a Viral Suppressor of RNAi
    MDPI AG ; 2020
    In:  Plants Vol. 10, No. 1 ( 2020-12-29), p. 59-
    Details
    In: Plants, MDPI AG, Vol. 10, No. 1 ( 2020-12-29), p. 59-
    Abstract: Plant viruses cause a range of plant diseases symptoms that are often responsible for significant crop production losses and the severity and spread of the symptoms may be affected by climate change. While the increase in anthropogenic activities has caused a critical problem of increased CO2 levels in the atmosphere, these elevated CO2 levels have been reported to reduce virus disease severity in some plant species. In such instances, it is not clear if the plant defense mechanisms are being enhanced or virus-mediated mechanisms to overcome plant resistance are being defeated. Additionally, a few studies have been attempted in this area to determine if reduced disease is the norm or the exception under enhanced CO2 levels. In the present study, the effects of elevated CO2 levels (750 ppm vs. 390 ppm) on RNAi-mediated resistance of Nicotiana tabacum against the cucumber mosaic virus (CMV), and the activity of viral suppressor of RNAi (VSR) 2b protein of CMV were evaluated. On the one hand, our results showed that elevated CO2 decreased the transcription of dicer-like protein 2 (DCL2), DCL4, and argonaut 1 (AGO1) genes with functions related to RNAi-mediated resistance when infected by CMV, which is contradictory with the decreased CMV copy numbers under elevated CO2. On the other hand, we found that elevated CO2 increased the calcium concentration and expression of the calcium-binding protein rgs-CaM in tobacco plants when infected by CMV, which directly weakened the function of 2b protein, the VSR of CMV, and therefore decreased the infection efficiency of the virus and suppressed the severity of CMV in tobacco plants under elevated CO2. This study provides molecular insights into the ecological implications underlying the development of prevention strategies against plant virus infection in the context of climate change.
    Type of Medium: Online Resource
    ISSN: 2223-7747
    URL: Article
    DOI: 10.3390/plants10010059
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2704341-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    An Aphid-Secreted Salivary Protease Activates Plant Defense in Phloem
    Elsevier BV ; 2020
    In:  Current Biology Vol. 30, No. 24 ( 2020-12), p. 4826-4836.e7
    Details
    In: Current Biology, Elsevier BV, Vol. 30, No. 24 ( 2020-12), p. 4826-4836.e7
    Type of Medium: Online Resource
    ISSN: 0960-9822
    URL: Article
    DOI: 10.1016/j.cub.2020.09.020
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
    detail.hit.zdb_id: 2019214-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Differential Levels of Fatty Acid‐Amino Acid Conjugates in the Oral Secretions of Lepidopteran Larvae Account for the Different Profiles of Volatiles
    Wiley ; 2021
    In:  Pest Management Science Vol. 77, No. 9 ( 2021-09), p. 3970-3979
    Details
    In: Pest Management Science, Wiley, Vol. 77, No. 9 ( 2021-09), p. 3970-3979
    Abstract: Plants have evolved sophisticated defense responses to insect herbivore attack, which often involve elicitors in the insects' oral secretions. The major eliciting compounds in insect oral secretions across different species and their potency in inducing volatile emissions have not yet been fully characterized and compared. RESULTS Seven lepidopteran insects with variable duration of association with maize were selected, five species known as pests for a long time ( Ostrinia furnacalis , Spodoptera exigua , Spodoptera litura , Mythimna separata , and Helicoverpa armigera ) and two newly emerging pests ( Athetis lepigone and Athetis dissimilis ). Oral secretions of the newly emerging pests have the highest total contents of Fatty Acid‐Amino Acid Conjugates (FACs), and their relative composition was well separated from that of the other five species in principal compound analysis. Redundancy analyses suggested that higher quantity of FACs was mainly responsible for the increases in maize volatiles, of which ( E )‐3,8‐dimethyl‐1,4,7‐nonatriene (DMNT) and ( E , E )‐4,8,12‐trimethyltrideca‐1,3,7,11‐tetraene (TMTT) were the most strongly inducible compounds. Adding FACs to the oral secretion of S. litura larvae significantly increased the emissions of TMTT and DMNT, confirming the key role of FACs in inducing volatile emissions in maize plants. Additional experiments with artificial diet spiked with linolenic acid suggested that variation in FACs is due to differences in internal FAC degradation and fatty acid excretion. CONCLUSION Compared with two newly emerging pests A. lepigone and A. dissimilis , the long‐term pests could diminish the volatile emission by maize through reducing the FAC content in their oral secretions, which may lower the risk of attracting natural enemies.
    Type of Medium: Online Resource
    ISSN: 1526-498X , 1526-4998
    URL: Issue
    URL: Article
    DOI: 10.1002/ps.v77.9
    DOI: 10.1002/ps.6417
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2003455-6
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    A novel gene REPTOR2 activates the autophagic degradation of wing disc in pea aphid
    eLife Sciences Publications, Ltd ; 2023
    In:  eLife Vol. 12 ( 2023-03-21)
    Details
    In: eLife, eLife Sciences Publications, Ltd, Vol. 12 ( 2023-03-21)
    Abstract: Wing dimorphism in insects is an evolutionarily adaptive trait to maximize insect fitness under various environments, by which the population could be balanced between dispersing and reproduction. Most studies concern the regulatory mechanisms underlying the stimulation of wing morph in aphids, but relatively little research addresses the molecular basis of wing loss. Here, we found that, while developing normally in winged-destined pea aphids, the wing disc in wingless-destined aphids degenerated 30-hr postbirth and that this degeneration was due to autophagy rather than apoptosis. Activation of autophagy in first instar nymphs reduced the proportion of winged aphids, and suppression of autophagy increased the proportion. REPTOR2 , associated with TOR signaling pathway, was identified by RNA-seq as a differentially expressed gene between the two morphs with higher expression in the thorax of wingless-destined aphids. Further genetic analysis indicated that REPTOR2 could be a novel gene derived from a gene duplication event that occurred exclusively in pea aphids on autosome A1 but translocated to the sex chromosome. Knockdown of REPTOR2 reduced autophagy in the wing disc and increased the proportion of winged aphids. In agreement with REPTOR’s canonical negative regulatory role of TOR on autophagy, winged-destined aphids had higher TOR expression in the wing disc. Suppression of TOR activated autophagy of the wing disc and decreased the proportion of winged aphids, and vice versa. Co-suppression of TOR and REPTOR2 showed that ds REPTOR2 could mask the positive effect of ds TOR on autophagy, suggesting that REPTOR2 acted as a key regulator downstream of TOR in the signaling pathway. These results revealed that the TOR signaling pathway suppressed autophagic degradation of the wing disc in pea aphids by negatively regulating the expression of REPTOR2 .
    Type of Medium: Online Resource
    ISSN: 2050-084X
    URL: Article
    DOI: 10.7554/eLife.83023
    Language: English
    Publisher: eLife Sciences Publications, Ltd
    Publication Date: 2023
    detail.hit.zdb_id: 2687154-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Apoptotic neurodegeneration in whitefly promotes the spread of TYLCV
    eLife Sciences Publications, Ltd ; 2020
    In:  eLife Vol. 9 ( 2020-07-30)
    Details
    In: eLife, eLife Sciences Publications, Ltd, Vol. 9 ( 2020-07-30)
    Abstract: When a plant becomes infected by a virus, its defenses get weakened, which attracts insects that are looking for an easy meal. Insects detect which plants are infected based on the color of the sickened plant and the smell of chemicals it releases. Once an insect leaves the infected plant, it may carry the virus to new plants, allowing the virus to spread. Insects, however, prefer the easy pickings of plants that are already infected, making them less likely to spread the virus. Plant viruses have found ways to overcome this preference, but how they do this was not fully understood. Learning more about how plant viruses manipulate insects into helping them spread could allow scientists to develop new ways of protecting food crops from viral diseases. Viruses that infect insects can trigger excessive immune system responses that damage insects’ nerves and cause them to behave differently. For example, their senses may become impaired, they may move less, or be less able to remember things. This has led scientists to wonder whether plant viruses that use insects to spread might manipulate the insects’ behaviors using a similar mechanism. Now, Wang et al. have investigated whether the tomato yellow leaf curl virus –TYLCV for short – changes the behavior of whiteflies, which are known to spread the virus. The experiments showed that whiteflies typically prefer tomato plants infected with the virus, but after carrying TYLCV, they displayed equal preference for both infected and uninfected plants. Analyzing which genes were active in the whiteflies revealed that TYLCV triggers a harmful immune response which turns on genes that cause cells in the brain to die. This impairs the whiteflies' sight and sense of smell, making it harder for them to distinguish between infected and uninfected plants. These findings suggest that the immune response triggered by the virus may be essential for the spread of TYLCV. It also identified a protein that causes the death of brain cells, leading to behavioral changes in the whiteflies. This suggests that targeting this protein, or other steps in this process, could help stop the spread of TYLCV in tomato plants.
    Type of Medium: Online Resource
    ISSN: 2050-084X
    URL: Article
    DOI: 10.7554/eLife.56168
    Language: English
    Publisher: eLife Sciences Publications, Ltd
    Publication Date: 2020
    detail.hit.zdb_id: 2687154-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Common-intersection hypothesis of development rate lines of ectotherms within a taxon revisited
    Elsevier BV ; 2011
    In:  Journal of Thermal Biology Vol. 36, No. 7 ( 2011-10), p. 422-429
    Details
    In: Journal of Thermal Biology, Elsevier BV, Vol. 36, No. 7 ( 2011-10), p. 422-429
    Type of Medium: Online Resource
    ISSN: 0306-4565
    URL: Article
    DOI: 10.1016/j.jtherbio.2011.07.009
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2011
    detail.hit.zdb_id: 1498364-3
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    The Contrasting Effects of Elevated CO2 on TYLCV Infection of Tomato Genotypes with and without the Resistance Gene, Mi-1.2
    Frontiers Media SA ; 2016
    In:  Frontiers in Plant Science Vol. 7 ( 2016-11-09)
    Details
    In: Frontiers in Plant Science, Frontiers Media SA, Vol. 7 ( 2016-11-09)
    Type of Medium: Online Resource
    ISSN: 1664-462X
    URL: Article
    DOI: 10.3389/fpls.2016.01680
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2016
    detail.hit.zdb_id: 2687947-5
    detail.hit.zdb_id: 2613694-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Serratia symbiotica Enhances Fatty Acid Metabolism of Pea Aphid to Promote Host Development
    MDPI AG ; 2021
    In:  International Journal of Molecular Sciences Vol. 22, No. 11 ( 2021-05-31), p. 5951-
    Details
    In: International Journal of Molecular Sciences, MDPI AG, Vol. 22, No. 11 ( 2021-05-31), p. 5951-
    Abstract: Bacterial symbionts associated with insects are often involved in host development and ecological adaptation. Serratia symbiotica, a common facultative endosymbiont harbored in pea aphids, improves host fitness and heat tolerance, but studies concerning the nutritional metabolism and impact on the aphid host associated with carrying Serratia are limited. In the current study, we showed that Serratia-infected aphids had a shorter nymphal developmental time and higher body weight than Serratia-free aphids when fed on detached leaves. Genes connecting to fatty acid biosynthesis and elongation were up-regulated in Serratia-infected aphids. Specifically, elevated expression of fatty acid synthase 1 (FASN1) and diacylglycerol-o-acyltransferase 2 (DGAT2) could result in accumulation of myristic acid, palmitic acid, linoleic acid, and arachidic acid in fat bodies. Impairing fatty acid synthesis in Serratia-infected pea aphids either by a pharmacological inhibitor or through silencing FASN1 and DGAT2 expression prolonged the nymphal growth period and decreased the aphid body weight. Conversely, supplementation of myristic acid (C14:0) to these aphids restored their normal development and weight gain. Our results indicated that Serratia promoted development and growth of its aphid host through enhancing fatty acid biosynthesis. Our discovery has shed more light on nutritional effects underlying the symbiosis between aphids and facultative endosymbionts.
    Type of Medium: Online Resource
    ISSN: 1422-0067
    URL: Article
    DOI: 10.3390/ijms22115951
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2019364-6
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Elevated ozone induces jasmonic acid defense of tomato plants and reduces midgut proteinase activity in H elicoverpa armigera
    Wiley ; 2015
    In:  Entomologia Experimentalis et Applicata Vol. 154, No. 3 ( 2015-03), p. 188-198
    Details
    In: Entomologia Experimentalis et Applicata, Wiley, Vol. 154, No. 3 ( 2015-03), p. 188-198
    Abstract: As a consequence of membrane lipid peroxidation, foliar defense compounds are changed by elevated ozone (O 3 ), which in turn affects the palatability and performance of insect herbivores. The induced defense of two tomato [ S olanum esculentum L. ( S olanaceae)] genotypes, namely jasmonic acid ( JA ) pathway‐deficient mutant spr2 and its wild‐type control, was studied in response to cotton bollworm, H elicoverpa armigera H übner ( L epidoptera: N octuidae), as well as the digestive adaptation of these insects under elevated O 3 in open‐top field chambers. Our data indicated that elevated O 3 increased foliar JA and salicylic acid ( SA ) levels simultaneously and up‐regulated proteinase inhibitors ( PI s) and lipoxidase activities in wild‐type plants, regardless of H . armigera infestation. In contrast, only the O 3 + H . armigera treatment increased free SA levels in spr2 plants, but did not affect JA level or PI activities. Additionally, the lower activity of midgut digestive enzymes, including active alkaline trypsin‐like enzyme and chymotrypsin‐like enzyme, was observed in the midgut of cotton bollworms after they consumed wild‐type plants treated for 2 h with elevated O 3 . With temporary increases at 8 h, all four digestive enzymes of interest in the insect midgut dropped when they were fed with wild‐type plants under elevated O 3 treatment. Increases in atmospheric O 3 are thought to increase JA signaling and consequently reduce the activities of midgut digestive enzymes in H . armigera , therefore enhancing plant resistance against insect herbivores.
    Type of Medium: Online Resource
    ISSN: 0013-8703 , 1570-7458
    URL: Issue
    URL: Article
    DOI: 10.1111/eea.2015.154.issue-3
    DOI: 10.1111/eea.12269
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2015286-3
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Up-regulation of MPK4 increases the feeding efficiency of the green peach aphid under elevated CO2 in Nicotiana attenuata
    Oxford University Press (OUP) ; 2017
    In:  Journal of Experimental Botany Vol. 68, No. 21-22 ( 2017-12-16), p. 5923-5935
    Details
    In: Journal of Experimental Botany, Oxford University Press (OUP), Vol. 68, No. 21-22 ( 2017-12-16), p. 5923-5935
    Type of Medium: Online Resource
    ISSN: 0022-0957 , 1460-2431
    URL: Article
    DOI: 10.1093/jxb/erx394
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2017
    detail.hit.zdb_id: 1466717-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...