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Phylogenetic Analysis of Sweetpotato Whitefly Bemisia tabaci in Bangladesh
MS Fatema Khatun,Pijush Kanti Jhan,Kyeong-Yeoll Lee 한국응용곤충학회 2016 한국응용곤충학회 학술대회논문집 Vol.2016 No.10
The sweetpotato whitefly Bemisia tabaci (Gennadius) is one of the most important sap sucking pests causing economic losses in a variety of vegetables in Bangladesh and as well as around the world. In the present study, the mtCOI sequence of B. tabaci was analysed using samples collected from different host plants (Potato, Brinjal, Tomato, Sweet potato, Bean) from district Gazipur, Patuakhali, Rajshahi and Nilphamari of Bangladesh. Phylogenetic analysis of our samples and relative sequences of B. tabaci in NCBI database was shown three independent clusters. Samples in Bangladesh were most similar with those of Thailand, Vietnam, Pakistan, China and India but did not show any B and Q aggressive biotypes.
MS. Fatema Khatun,MD Munir Mostafiz,Kyeong-Yeoll Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10
Bemisia tabaci is a species complex consisting of at least 40 species which are morphologically indistinguishable. Althoughgenetic diversity of B. tabaci have been studied in many countries, its information is lack in Bangladesh. The COI sequencewas determined from 91 samples collected in Bangladesh and the phylogenetic relationship was constructed. Four crypticspecies (Asia I, Asia II-1, Asia II-5 and Asia II-10) were present in different regions. While both Asia I and Asia II-1was widely distributed in all around the country, Asia II-5 was central and southern regions, and Asia II-10 was onlyin the central region. Otherwise, our results showed that Asia II-5 had the highest haplotype and nucleotide diversity.Genetic groups of B. tabaci in Bangladesh were most similar with those of Thailand, Vietnam, Pakistan, China, and Indiabut did not show any aggressive cryptic species such as MED and MEAM-1.
Current genetic diversity of Bemisia tabaci in Bangladesh
MS. Fatema Khatun,Kyeong-Yeoll Lee 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.04
The sweetpotato whitefly Bemisia tabaci (Gennadius) is a serious pest and vector of various virus causing economic losses in a variety of vegetables in Bangladesh as well as worldwide. In the present study, the mtCOI sequence of B. tabaci was analysed using 70 samples collected from different host plants at 12 districts of Bangladesh. Phylogenetic analysis was shown genetic divergence of our samples was 0.12 – 13.97%. There was three independent clusters such as Asia I, Asia II-1 and Asia II-5 genetic groups. Sequence diversity among three groups was 13.97%, 15.07% and 9.67%. Geographic diversity, for example, Asia I distributed in Central and Northern parts, Asia II-5 Central and Southern parts but Asia II-1 were present everywhere in Bangladesh. There was no B and Q aggressive biotypes in Bangladesh. Most Asia I and II was distributed in southeastern countries including Thailand, Vietnam, Pakistan, China and India. Our results provide understanding of genetic diversity of B. tabaci in southeast area.
Tania Parvin,Mim Binti Akhlas,Fatema Khatun,Anzuman Akter,Md. Al Amin,Muhammad Torequl Islam,Razina Rouf 경희대학교 융합한의과학연구소 2019 Oriental Pharmacy and Experimental Medicine Vol.19 No.4
This study aimed at phytochemical analysis and evaluation of toxic and protective efects of the crude aqueous extract of Typhonium trilobatum. Toxicity analysis was done in Allium cepa, while anti-infammatory, and membrane stabilizing and clotlysis capacity were tested by using egg albumin and human erythrocytes, respectively. The results suggest that T. trilobatum aqueous extract contains alkaloids, glycosides, tannins, saponins, favonoids and reducing sugars. The crude extract exhibited toxicity in A. cepa in a time and concentration dependent manner. The highest root growth inhibition was observed at exposure time 72 h in 20% (v/v) concentration extract of the herb. The extract at low concentration (2.5 and 5%) reduced the root growth inhibition capacity at 48 h in comparison to 24 and 72 h, possibly by adaptation of DNA damage profle in the eukaryotic test system (A. cepa), which was further confrmed in anti-infammatory and membrane stabilizing, and anti-atherothrombosis test. In the latter cases, the extract at 0.02–0.08% (v/v) signifcantly (p<0.05, p<0.01, p<0.001) inhibited protein denaturation, membrane lysis, while enhanced clotlysis capacity in a concentration-dependent manner. In conclusion, the extract exerted toxic efects at high concentrations and protective efects at low concentrations. T. trilobatum may be one of the potential sources of phytotherapeutic agents, especially for the treatment of infammatory and cardiovascular diseases and disorders.
AKINTOLA ASHRAF AKINTAYO,Hwal-Su Hwang,Mst. Fatema Khatun,Adeolu Taiwo Ande,Kyeong-Yeoll Lee 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.4
Bemisia tabaci is a species complex of at least 44 cryptic species with a worldwide distribution. It is a serious pest of many crop plants as well as a successful vector of at least 100 begomoviruses. Using B. tabaci collected from cassava and tomato fields in the southwestern and north central regions of Nigeria, we determined nucleotide sequences from the mitochondrial cytochrome c oxidase subunit I (COI) of 23 B. tabaci samples, the 16S and 23S ribosomal DNA of endosymbionts, and the coat protein gene of geminiviruses ingested by the whiteflies. The COI analysis identified three different genetic groups including the indigenous Sub-Saharan Africa 1 subgroup 1 (SSA1-SG1) and 5 (SSA1-SG5, which was most prevalent), and an invasive cryptic species (Mediterranean). SSA1 was infected by five known secondary endosymbionts, Arsenophonus, Cardinium, Hamiltonella, Rickettsia, and Wolbachia, and co-infections with two or three endosymbionts were common. Five begomoviruses, okra enation leaf curl virus, squash leaf curl China virus, tobacco curly shoot virus, tomato leaf curl New Delhi virus, and tomato yellow leaf curl virus, were detected from 43.5% of the B. tabaci samples. However, cassava mosaic disease that causes devastating cassava yield losses was not detected in this study. This study improves the current under standing of the genetic diversity of B. tabaci cryptic species, and it reveals their relationships with endosymbionts and geminiviruses in the cassava and tomato fields of Nigeria.
Global Spread of Begomoviruses via whiteflies and a new route via plant seeds
Kyeong-Yeoll Lee,Jae-Kyoung Shim,M.S. Fatema Khatun,Pijush Kanti Jhan,Hwal-Su Hwang,Sukchan Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10
Tomato yellow leaf curl virus (TYLCV) and its vector insect, the sweet potato whitefly Bemisia tabaci, are major threats to tomato and pepper production in all around world. Since the last three decades, both B. tabaci and TYLCV have been invaded into many countries via different routes. Our studies showed that various geminiviruses including TYLCV can be transmissible by seeds as well as whiteflies. Furthermore, commercially developed resistant tomato strains against TYLCV infection can serve as TYLCV reservoirs and potentially influence on TYLCV epidemics. Therefore, transmission pathways through both insect vectors and seeds should be concerned for suitable management of geminiviruses and whiteflies.