scholarly journals Molecular divergence of secondary endosymbiont, Cardinium in Bemisia tabaci (Gennadius) and associates

2015 ◽  
Vol 40 (1) ◽  
pp. 121-135 ◽  
Author(s):  
SMH Jahan ◽  
KY Lee ◽  
MIA Howlader ◽  
HMK Bashar ◽  
GN Hasan
Keyword(s):  
Bemisia Tabaci ◽  
Trialeurodes Vaporariorum ◽  
The Philippines ◽  
Encarsia Formosa ◽  
Phylogenetic Groups ◽  
Rdna Sequences ◽  
Aleurodicus Dispersus ◽  
16S Rdna Sequences ◽  
Q Biotype ◽  
Secondary Endosymbiont

Whitefly, Bemisia tabaci (Hemiptera : Aleyrodidae) harbors numerous secondary endosymbionts, which are transmitted from mother to offspring by both horizontally and vertically, that have crucial role on host selection, biology, and evolution. Bacteria, Cardinium was identified in B. tabaci as well as in other whitefly population from many different countries by comparing 16S rDNA sequences. Cardinium were detected in all tested indigenous B. tabaci populations of Bangladesh, Myanmar, Nepal, and the Philippines as well as Q1 biotype of Korea. It was absent in B biotype of Korea and Q biotype of China. Cardinium was also detected in three out of five tested Aleurodicus dispersus population as well as in five out of seven Trialeurodes vaporariorum, whereas they were not detected in Tetraleurodes acaciae populatuion. In adition, Cardinium was detected in parasitoid Encarsia formosa attacking B. tabaci. Among the 19 whitefly populations from different countries, present studies identified four phylogenetic groups of Cardinium, thereby demonstrating the high diversity of this genus. Cardinium phylogeny suggests a correlation of geographical range with ecological variation at the species level.Bangladesh J. Agril. Res. 40(1): 121-135, March 2015

Structural Analysis Based on 16S rDNA Sequences of Eight Strains of Leptospirillum ferriphilum from Acid Mine Drainage or Hot Spring

2012 ◽  
Vol 550-553 ◽  
pp. 1128-1132
Author(s):  
Jian Gao ◽  
Jian Kang ◽  
Guan Zhou Qiu
Keyword(s):  
Structural Analysis ◽  
16S Rdna ◽  
Mine Drainage ◽  
Hot Spring ◽  
Phylogenetic Groups ◽  
Minimal Free Energy ◽  
16S Rdna Sequence Analysis ◽  
Rdna Sequences ◽  
Species Formation ◽  
16S Rdna Sequences

The correlations between the phylogenetic similarity and original geographical sites of L. ferriphilum were evaluated on the basis of 16S rDNA sequence analysis. Results indicated that all of L. ferriphilum strains in this work may be classified into three phylogenetic groups, and there were some certain links between phylogenic similarity and the mineralogical characteristics. Furthermore, structural analysis of 16S rDNA sequences suggested that nucleotide variables (signature sites) were not randomly distributed. Of 23 signature sites detected, 17 positions were found in the first 600 bp from 5' terminal except position 1020, 1022, 1023, 1147, 1155 and 1277. Interestingly, 13 positions of them were found in the V6 region. Thus, the secondary structure and minimal free energy were determined in the V6 region among strains of three phylogenetic groups. The above results may be very useful in helping to screen bioleaching microorganisms with great application prospect and discerning the microevolutionary mechanisms of species formation.

scholarly journals A rare and unusual new bittiine genus with two new species from the South Pacific (Cerithiidae, Gastropoda)

ZooKeys ◽  
2018 ◽  
Vol 758 ◽  
pp. 1-18 ◽  
Author(s):  
Ellen E. Strong ◽  
Philippe Bouchet
Keyword(s):  
New Species ◽  
New Genus ◽  
South Pacific ◽  
The Philippines ◽  
The South ◽  
Rdna Sequences ◽  
Fringing Reefs ◽  
16S Rdna Sequences ◽  
Two New Species ◽  
Large Populations

A new genus, Limatium gen. n., and two new species, L.pagodula sp. n. and L.aureum sp. n. are described, found on outer slopes of barrier reefs and fringing reefs in the South Pacific. They are rare for cerithiids, which typically occur in large populations. The two new species are represented by 108 specimens sampled over a period of 30 years, only 16 of which were collected alive. Three subadults from the Philippines and Vanuatu likely represent a third species. In addition to their rarity, Limatium species are atypical for cerithiids in their smooth, polished, honey to golden brown shells with distinctive white fascioles extending suture to suture. The radula presents a unique morphology that does not readily suggest an affinity to any of the cerithiid subfamilies. Two live-collected specimens, one of each species and designated as holotypes, were preserved in 95% ethanol and sequenced. Bayesian analysis of partial COI and 16S rDNA sequences demonstrates a placement in the Bittiinae, further extending our morphological concept of the subfamily.

scholarly journals Identifikasi kutukebul (Hemiptera: Aleyrodidae) dari beberapa tanaman inang dan perkembangan populasinya

2017 ◽  
Vol 3 (1) ◽  
pp. 41
Author(s):  
Purnama Hidayat ◽  
Yuliani Yuliani ◽  
Dewi Sartiami
Keyword(s):  
Virus Infection ◽  
Plant Growth ◽  
Bemisia Tabaci ◽  
Population Dynamic ◽  
Host Plants ◽  
Trialeurodes Vaporariorum ◽  
Chili Pepper ◽  
Limited Information ◽  
Aleurodicus Dispersus ◽  
Leaf Curl Disease

Whiteflies (Hemiptera: Aleyrodidae) can cause direct and indirect damages on plants, especially vegetables. There is only limited information regarding taxonomy and population dynamic of whiteflies attacking vegetables in Indonesia. This research is conducted to identify species of whitefly collected from chili pepper, tomato, and soybean, and to study their population dynamic. The information gathered from these studies will be useful to support whitefly management in the field. Based on morphology identification of the puparium collected directly from the host plants, there were four species of whitefly identified from chili pepper, tomato, and soybean in Bogor, Cianjur, and Sukabumi, i.e. Bemisia tabaci, Aleurodicus dispersus, Trialeurodes vaporariorum, and Dialeurodes sp. The presence of B. tabaci on chili pepper and tomato was associated with virus infection that causes yellowing and leaf curl disease. This population of B. tabaci tended to increase along with plant growth and generally reached the highest population when the plant was 60-70 days after planting.

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