Publications by authors named "George A C Beattie"

Article Synopsis
  • Infection with pathogens like "Liberibacter asiaticus" and certain fungi can enhance the reproductive ability (fecundity) of insect vectors, which is beneficial for the pathogens.
  • This study focuses on the roles of specific microRNAs (miR-2 and novel-miR-109) in regulating these fecundity changes and found that lower levels of these miRNAs in the ovaries of infected insects are linked to increased fecundity and pathogen presence.
  • The findings suggest that a conserved mechanism exists where juvenile hormone suppresses these miRNAs, leading to altered gene expression that boosts female insect reproduction in the presence of bacterial and fungal infections.
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serves as the primary vector for ' Liberibacter asiaticus (Las),' the bacterium associated with the severe Asian form of huanglongbing. Las-positive are more fecund than their Las-negative counterparts and require extra energy expenditure. Therefore, understanding the molecular mechanisms linking metabolism and reproduction is of particular importance.

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Article Synopsis
  • Scientists study how insects and the germs that make them sick interact, especially a bug called Diaphorina citri and a germ known as CLas, which causes a plant disease.
  • When the bug has CLas, it can lay more eggs than when it doesn't have it, but how this happens is still a mystery.
  • Researchers found that CLas changes the bug's body and uses some special molecules (like miR-275) to help it have more babies, which also helps the germ spread more easily.
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Populations of decline with elevation and, in a study in Bhutan, were rarely found above 1200 m ASL. The impact of ultraviolet (UV) radiation, particularly UV-B, on immature stages of the psyllid was proposed as limiting factor. As no studies have been undertaken on the influences of UV radiation on the development of , we examined the effects of UV-A and UV-B on different stadia of the psyllid.

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Detection of new viruses or new virus hosts is essential for the protection of economically important agroecosystems and human health. Increasingly, metatranscriptomic data are being used to facilitate this process. Such data were obtained from adult Asian citrus psyllids (ACP) ( Kuwayama) that fed solely on mandarin ( × L.

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The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, transmits ‘Candidatus Liberibacter asiaticus’ (CLas), a phloem-limited bacterium associated with the severe Asian form of huanglongbing (HLB), and the most destructive disease of citrus. The pathogen and the psyllid, both of South Asian origin, are now widespread in citrus regions of Asia and the Americas. There is no cure for the disease.

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Kuwayama transmits a destructive citrus disease caused by a fastidious bacterium ' Liberibacter asiaticus' (CLas) designated as Huanglongbing (HLB) which posed a risk of detrimental threat to the Malaysian citrus industry. All life stages show a lumped habit on young flushes and its population fluctuations was closely related to accessibility of young flushes. The study aimed to investigate if the appearance of young flush shoots on citrus influences ACP population fluctuation and if horticultural mineral oil (HMO) could reduce spread of HLB transmission by ACP in a commercial healthy orchard.

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' Liberibacter asiaticus' is an insect-transmitted, phloem-restricted α-proteobacterium associated with huanglongbing. Here, we provide the whole genome sequence of ' L. asiaticus' strain ReuSP1 from its insect vector (Hemiptera: Liviidae) collected in La Réunion.

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The draft genome sequence of a novel " Liberibacter" species detected in an unidentified species of (Rutaceae) collected in Bhutan is reported. The total length is 1,408,989 bp with 1,169 coding sequences in 96 contigs, a GC content of 37.3%, and 76 to 77% average nucleotide identity with several other " Liberibacter" species.

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Background: Several plant-pathogenic bacteria are transmitted by insect vector species that often also act as hosts. In this interface, these bacteria encounter plant endophytic, insect endosymbiotic and other microbes. Here, we used high throughput sequencing to examine the bacterial communities of five different psyllids associated with citrus and related plants of Rutaceae in Bhutan: Diaphorina citri, Diaphorina communis, Cornopsylla rotundiconis, Cacopsylla heterogena and an unidentified Cacopsylla sp.

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and are aurantioid hosts of the Asian citrus psyllid (ACP) , the principal vector of ' Liberibacter asiaticus' (Las). Las is the pathogen associated with huanglongbing (HLB), the Asian form of which is the most devastating disease of species and cultivars (Rutaceae: Aurantioideae). is a common ornamental and is grown as an ornamental, a citrus rootstock, and a hedgerow fence plant.

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The biology and behaviour of the psyllid Diaphorina citri Kuwayama (Hemiptera: Sternorrhyncha: Liviidae), the major insect vector of bacteria associated with huanglongbing, have been extensively studied with respect to host preferences, thermal requirements, and responses to visual and chemical volatile stimuli. However, development of the psyllid in relation to the ontogeny of immature citrus flush growth has not been clearly defined or illustrated. Such information is important for determining the timing and frequency of measures used to minimize populations of the psyllid in orchards and spread of HLB.

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