Sri Lankan Journal of Biology最新文献

{"title":"Karyo-Morphological analyses of Drimia gigantea and Drimia Viridula; Two of the three species in Altissima complex of the family hyacinthaceae","authors":"S. Omokanye, D. A. Animasaun, O. Mustapha, S. Oyewole","doi":"10.4038/sljb.v8i1.91","DOIUrl":"https://doi.org/10.4038/sljb.v8i1.91","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127072722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biofertilizers and Bioherbicides in a Developing Bioeconomy","authors":"A. Lateef, L. AbdulRoheem, Y. Oyebamiji, L. Naher","doi":"10.4038/sljb.v8i1.101","DOIUrl":"https://doi.org/10.4038/sljb.v8i1.101","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123900477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population genetic and phylogeographic relationships of the dengue vector Aedes aegypti inferred from three localities of Sri Lanka","authors":"M. D. Nirmani, N. Madushani, N. Perera, C. Dangalle, G. Galhena","doi":"10.4038/sljb.v7i2.98","DOIUrl":"https://doi.org/10.4038/sljb.v7i2.98","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115982521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical and proximate composition of MK 373, Abujachi and Makowchi groundnut varieties grown in Kwara State, Nigeria","authors":"A. S. Abdul baki, B. Olayinka, K. A. Abdul kareem, K. Abdulkareem, M. Ibuowo, I. Kareem, A. Sagaya, A. Lawal, B. Adigun, B. Olaniyi, O. Mustapha","doi":"10.4038/sljb.v7i2.99","DOIUrl":"https://doi.org/10.4038/sljb.v7i2.99","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128808422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hatching success and chick mortality of the ostrich (Struthio camelus) in a commercial farm in Nepal","authors":"B. Aryal, L. Khanal","doi":"10.4038/sljb.v7i2.84","DOIUrl":"https://doi.org/10.4038/sljb.v7i2.84","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127481716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biological fitness costs associated with the various permethrin resistance development statuses in Anopheles gambiae in Nigeria","authors":"A. Ande, O. Adelaja, A. V. Agada, O. Akanni, A. Omotayo","doi":"10.4038/sljb.v7i1.73","DOIUrl":"https://doi.org/10.4038/sljb.v7i1.73","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"26 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113963482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation of gut associated bacteria from Callinectes amnicola (Crustacea: Portunidae) collected from two interconnecting tropical lagoons in Nigeria","authors":"R. Moruf","doi":"10.4038/sljb.v7i1.79","DOIUrl":"https://doi.org/10.4038/sljb.v7i1.79","url":null,"abstract":"","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124057913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro propagation of Gyrinops walla Gaetner ‘Walla patta’, a vulnerable agarwood producing species in Sri Lanka","authors":"S. Munasinghe, S. Somaratne, S. Weerakoon, C. Ranasinghe","doi":"10.4038/sljb.v6i2.82","DOIUrl":"https://doi.org/10.4038/sljb.v6i2.82","url":null,"abstract":"Aloeswood or Agarwood has long been a perfumery commodity traded between Mediterranean Region and Southeast Asia since B. C. era. Oil or chips obtained by destructive harvesting of several Thymeleaceous genera including Aquilaria and Gonystylus are expensive and such ingredients are high in demand in the global market. The recent discovery of Gyrinops walla as a potential producer of market-quality agarwood in mature damaged woods and branches, intensified illicit felling and exportation of G. walla that led to it being in the verge of extinction from Sri Lankan flora. The sustainable utilization of G. walla undoubtedly enhances the foreign exchange of the country and the non-destructive utilization G. walla through tissue culture-based techniques is the only option available for sustainable exploitation and conservation of the vulnerable G. walla species. Micropropagation of G. walla was achieved by varying concentrations of BAP and NAA on MS medium to produce shoot and root with leaf-derived callus, respectively. The phytohormone concentrations of 3.0 mg/l BAP and 2.0 mg/l NAA proved the optimum concentrations for shoot and root induction, respectively. The callus turned to green and produced fewer buds. Roots were protruded out from the calli in the root induction medium. The findings of the study led to conclude that the micropropagation was viable in potential as an in vitro system for sustainable utilization and conservation endeavours of G. walla.","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121952970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Divergence of plastid 2-oxoglutarate “only” transporters away from general transporters by using a cysteine-rich architecture","authors":"D. Gunawardana","doi":"10.4038/sljb.v6i2.81","DOIUrl":"https://doi.org/10.4038/sljb.v6i2.81","url":null,"abstract":"The common carbon and nitrogen currency, 2-oxoglutarate, could become a valuable resource for nitrogen assimilation and carbon centered biochemical fates. Here in this in silico study, a myriad of factors was used, namely phylogeny, sequence comparisons, and presence and location of clustered cysteines in specific plastid transporters of 2-oxoglutarate, to examine their evolution away from more generalized transporters. This transition would be to adopt the capability of internalizing 2-oxoglutarate alone or with superior specificities at the expense of malate. In phylogeny, the specific 2-oxoglutarate transporters (Cluster 1) are clustered in a separate clade away from 2 clades of general transporters (Cluster 2 and 3). The exclusivity (Cluster 1) and promiscuity of transporters (Cluster 2 and 3) compared to Arabidopsis counterparts characterized prior to this study, were used as a benchmark for my study. Within this mother clade of exclusive transporters, C4 and C3 2-oxoglutarate transporters once again form separate clusters of monophyly.  Furthermore, a pattern of Cys –X-X-Cys-X(19)-Cys is conserved within the 2-oxo-glutarate only transporters that is missing in general transporters. Cysteines which are functionally key residues are inferred to be mediating intra- or inter-reactive disulfide bond formation or using a thiol (sulfhydryl) group for transport or to be forming a metal binding site. When a disulfide bond prediction tool was employed, it showed with negligible doubt that the Cys-X-X Cys-X(19) -Cys region was a strong contender for 2 separate disulfide bonds, although the middle cysteine was predicted to be involved in both.  In addition, Cluster 2 general Zea mays C4 transporters are shown to be more recalcitrant to mutations of cysteines, compared to Panicum and Oryza counterparts.  The study of 2-oxoglutarate and its availability in the chloroplast could play a two-prong role in C4 plants: to be a candidate for synthesis of bundle sheath cell Rubisco enzyme, which makes up ~50% of plant proteins, via ammonia assimilation, and even playing a role in carbon-centered biochemical pathways. This study could greatly facilitate choices in the tinkering of the right transporters for a future C4 rice in a climate change impacted world.","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128895475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid mass propagation of endangered valuable medicinal plant Salacia chinensis L. and GC-MS/LC-MS analysis of active compounds produced in callus and leaf extracts","authors":"S. G. Kamat, R. Vasudeva, C. G. Patil","doi":"10.4038/sljb.v6i2.80","DOIUrl":"https://doi.org/10.4038/sljb.v6i2.80","url":null,"abstract":"A protocol for indirect organogenesis of Salacia chinensis was established. Normally S. chinensis is propagated through seeds. However, due to the difficulty to obtain uniform plants in a short time period by seed germination, micro-propagation is a possible alternative method. For the micro-propagation, media with different concentration combinations of cytokinins and auxins were used to induce callus formation in three explants types: leaf segment, nodal segment and seeds. The rate of recurrence of callus formation from leaf on Murashige and Skoog (MS) basal medium supplemented with thidiazuron (TDZ) 0.5mg and TDZ 1mg was 100% and the maximum percentage of shoot let development from nodal segment on MS basal medium supplemented with BAP 6-(benzylamino purine) 3.5+ indole3-butyric acid (IBA) 1 mg/l was 78.3% when compared to other plant growth regulators (PGR) combinations used. The highest shoot regeneration response (85%) and the determined shoots (12.33 ± 0.33%) per callus were attained from leaf explants on MS medium containing 1-napthaleneacetic acid (NAA) 1mg/l + BAP 0.5 mg/l. The seeds showed highest percentage of shoot formation on MS medium supplemented with BAP 2mg + indole 3-acetic acid (IAA) 2mg/l and BAP 2mg + isopentenyl adenine (2iP) 2mg/l. Highest root formation (70±1.3%) was found in shoot regenerated using leaf segment on MS medium supplemented with IBA 0.5mg. The gas chromatography mass spectrometry (GC-MS) analysis of methanolic extract of callus showed more compounds at higher percentage. HPLC-MS analysis of methanolic extract of callus showed higher concentration of Mangifera than in leaf extracts are reported for the first time.","PeriodicalId":145536,"journal":{"name":"Sri Lankan Journal of Biology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130830985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}