Screening of Some Sunflower (Helianthus annuus Linnaeus Compositae) Genotypes Against Insect Pests

Aslam, Muhammad; Hafeez-ur-Rahman,

doi:10.3923/pjbs.2000.2241.2243

Cited by 3 publications

(3 citation statements)

References 6 publications

(4 reference statements)

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“…In light of these studies and our own investigation, further research is needed to understand the interactions between L. striatellus , grasses or weeds (located within or around vineyards) and grapevine in GY epidemiology. Different species of Circulifer , such as C. tenellus and C. haematoceps , have been described as vectors of phytoplasmas belonging to taxonomic groups 16SrI, 16SrII, 16SrVI and 16SrIX (Aslam et al, 2021; Salehi et al, 2017). Thus, “ Ca .…”

Section: Discussionmentioning

confidence: 99%

Grapevine yellows in Jordan: Associated phytoplasmas, putative insect vectors and reservoir plants

Abu Alloush,

Bianco,

Busato

et al. 2023

Plant Pathology

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Field surveys were conducted in wine and table grape vineyards from June to October 2020 in 13 locations belonging to five governorates in North and South Jordan. Typical grapevine yellows symptoms, including leaf reddening/yellowing and rolling were observed on 10% to 55% of vines. Nested PCR‐based amplification of the 16S rRNA gene detected phytoplasmas in 22% and 15.7% of the analysed symptomatic wine and table grape cultivar plants, respectively. Amplicon nucleotide sequence analyses identified the detected phytoplasmas as “Candidatus Phytoplasma solani” (taxonomic subgroup 16SrXII‐A), “Ca. P. omanense” (16SrXXIX‐A and ‐B), “Ca. P. aurantifolia” (16SrII‐C) and “Ca. P. asteris” (16SrI‐R) in 72.4%, 17.2%, 6.9% and 3.4% of infected plants, respectively. Such phytoplasmas were found differentially distributed in wine and table grape cultivar vineyards surveyed. Further investigation identified “Ca. P. solani” in the putative insect vectors Orosius cellulosus (first report in Jordan), Euscelidius mundus, Laodelphax striatellus, and Circulifer sp., and in bindweed; “Ca. P. aurantifolia” in the insect O. cellulosus and in bindweed; “Ca. P. omanense” in the insect Psammotettix striatus; and “Ca. P. asteris” in the insects Arboridia adanae, Cicadulina bipunctata, Circulifer sp., L. striatellus, Hyalesthes obsoletus, and P. striatus. Based on this preliminary data, ecological cycles of such phytoplasmas are discussed. Results suggest that the diversity and ecology of grapevine yellows phytoplasmas in Jordan are more complex than previously known, leading to a potential risk of disease outbreaks.

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Section: Discussionmentioning

confidence: 99%

Grapevine yellows in Jordan: Associated phytoplasmas, putative insect vectors and reservoir plants

Abu Alloush,

Bianco,

Busato

et al. 2023

Plant Pathology

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“…'Candidatus Phytoplasma australasiaticum' is associated with many diseases of a broad range of hosts and over a broad geographic range, including Australia, India, Iran, Oman, and Pakistan, and Turkey [21,22,25]. Insects in the family Cicadellidae have been identified as putative vectors for 16SrII-D subgroup members, including Orosius lotophagorum (Kirkaldy), O. argentatus (Lachlan), O. orientalis (Matsumura), as well as Austroagallia torrida (Evans), Neoaliturus (Circulifer) tenellus (Baker), and Neoaliturus haematoceps (Mulsant and Rey) [20,26,[95][96][97][98][99]. 'Ca.…”

Section: 'Candidatus Phytoplasma' Species Descriptionsmentioning

confidence: 99%

The observation of taxonomic boundaries for the 16SrII and 16SrXXV phytoplasmas using genome-based delimitation

Jardim

Tran-Nguyen²,

Gambley³

et al. 2023

International Journal of Systematic and Evolutionary Microbiology

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Within the 16SrII phytoplasma group, subgroups A–X have been classified based on restriction fragment length polymorphism of their 16S rRNA gene, and two species have been described, namely ‘Candidatus Phytoplasma aurantifolia’ and ‘Ca. Phytoplasma australasia’. Strains of 16SrII phytoplasmas are detected across a broad geographic range within Africa, Asia, Australia, Europe and North and South America. Historically, all members of the 16SrII group share ≥97.5 % nucleotide sequence identity of their 16S rRNA gene. In this study, we used whole genome sequences to identify the species boundaries within the 16SrII group. Whole genome analyses were done using 42 phytoplasma strains classified into seven 16SrII subgroups, five 16SrII taxa without official 16Sr subgroup classifications, and one 16SrXXV-A phytoplasma strain used as an outgroup taxon. Based on phylogenomic analyses as well as whole genome average nucleotide and average amino acid identity (ANI and AAI), eight distinct 16SrII taxa equivalent to species were identified, six of which are novel descriptions. Strains within the same species had ANI and AAI values of >97 %, and shared ≥80 % of their genomic segments based on the ANI analysis. Species also had distinct biological and/or ecological features. A 16SrII subgroup often represented a distinct species, e.g., the 16SrII-B subgroup members. Members classified within the 16SrII-A, 16SrII-D, and 16SrII-V subgroups as well as strains classified as sweet potato little leaf phytoplasmas fulfilled criteria to be included as members of a single species, but with subspecies-level relationships with each other. The 16SrXXV-A taxon was also described as a novel phytoplasma species and, based on criteria used for other bacterial families, provided evidence that it could be classified as a distinct genus from the 16SrII phytoplasmas. As more phytoplasma genome sequences become available, the classification system of these bacteria can be further refined at the genus, species, and subspecies taxonomic ranks.

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“…The weekly average number of Eutetranycus arabicus population in sunflower plants of 2010 and 2011 seasons was shown in Tables(4) and fig (4)…”

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Susceptibility of Some Sunflower Cultivars for Piercing Sucking Pests in Sohag Governorate

Mohamed¹,

El-Aziz²

2013

Egyptian Journal of Agricultural Research

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This study was carried out to evaluate the susceptibility of certain cultivars of sunflower crop ( Giza 102, Pioneer6480, Sakha 53 and Miak) to certain piercing sucking pests' infestation under field conditions for two successive seasons (2010 & 2011) in Sohag governorate, Egypt.Data revealed that the tested sunflower cultivars have marked variation in their susceptibility to pest infestation. Giza102 & Sakha 53 cultivars were the most susceptible for E. decipiens nymphs and M. persicae pests infestation as it showed a mean number of 18.07 & 18.4 nymphs/15 leaflet & 4.89, 2.07 individual/15 sunflower leaflet followed by, Miak & pioneer6480 during 2010 season, a similar trend was obtained for two pests in 2011. On the other hand, the resistant cultivars to the whitefly infestation could be arranged in ascending as follow:

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Screening of Some Sunflower (Helianthus annuus Linnaeus Compositae) Genotypes Against Insect Pests

Cited by 3 publications

References 6 publications

Grapevine yellows in Jordan: Associated phytoplasmas, putative insect vectors and reservoir plants

Grapevine yellows in Jordan: Associated phytoplasmas, putative insect vectors and reservoir plants

The observation of taxonomic boundaries for the 16SrII and 16SrXXV phytoplasmas using genome-based delimitation

Susceptibility of Some Sunflower Cultivars for Piercing Sucking Pests in Sohag Governorate

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