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In vivo screening of salinity tolerance in Giant Swamp Taro (Cyrtosperma merkusii) 巨型沼泽芋耐盐性的体内筛选
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2014-07-30 DOI: 10.1071/SP14005
Shiwangni Rao, Mary B. Taylor, A. Jokhan
{"title":"In vivo screening of salinity tolerance in Giant Swamp Taro (Cyrtosperma merkusii)","authors":"Shiwangni Rao, Mary B. Taylor, A. Jokhan","doi":"10.1071/SP14005","DOIUrl":"https://doi.org/10.1071/SP14005","url":null,"abstract":"Giant Swamp Taro (Cyrtosperma merkusii) is a staple food crop in the Pacific, especially in the low lying atoll islands such as Tuvalu and Kiribati. This is owing to its ability to survive under poor soil conditions and harsh environments. However, as a result of the effects of climate change such as sea water inundation and intrusion into the fresh ground water lens, this crop is now under threat. To address this issue an adaption approach was taken whereby, Cyrtosperma merkusii was screened in vivo for salt tolerance. The epistemology followed random selection of two cultivars Ikaraoi and Katutu. These two cultivars were subjected to 0% (0 parts per trillion), 0.5% (5 ppt), 1% (10 ppt), 1.5% (15 ppt) and 2% (20 ppt) of salt in Yates’s advance seedling common potting mix. Both cultivars were able to tolerate salinity levels up-to 5ppt which is significantly more than the salt tolerance in glycophytes of 2.83 ppt. This research provides an insight into the variation of salt tolerance that may exist in C.merkusii gene pool, which can be used to adapt to natural disasters and buffer its impacts.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114309265","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}
引用次数: 3
Fuzzy Energy Distribution to a Variable Consumer Load 可变用户负荷下的模糊能量分配
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2014-07-01 DOI: 10.1071/SP14006
A. Lal, Ravitesh Kumar, U. Mehta, G. Vachkov
{"title":"Fuzzy Energy Distribution to a Variable Consumer Load","authors":"A. Lal, Ravitesh Kumar, U. Mehta, G. Vachkov","doi":"10.1071/SP14006","DOIUrl":"https://doi.org/10.1071/SP14006","url":null,"abstract":"The paper demonstrates the fuzzy logic based smart distributed system to utilize the available energy optimally. We study the power system with two distributed sources of renewable energy like wind and solar together with normal power grid supply. Through the suitable allotter of the generation ratio from power sources, the distribution generation system, combined with battery bank, can provide user with reliable and constant electric power. Therefore a smart energy distributor is useful to supply energy to consumers such that their demand is supplied optimally depending available energy and battery status. In this work, a new distributor system is tested with fuzzy logic theory to satisfy the load demand constantly at the same time to keep the charging state of the battery at a safe level. Simulation results are also presented to illustrate the potential benefits of the smart distributor by maximizing the usage of renewable energy and depending less on the supply grid.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114447047","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}
引用次数: 0
Mai Veikau: A Call for Action, Not Wonder: A book review 麦维考:呼吁行动，而不是奇迹:一篇书评
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2012-02-01 DOI: 10.1071/sp12009
R. Thaman
{"title":"Mai Veikau: A Call for Action, Not Wonder: A book review","authors":"R. Thaman","doi":"10.1071/sp12009","DOIUrl":"https://doi.org/10.1071/sp12009","url":null,"abstract":"","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122972733","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}
引用次数: 1
Some estimation procedures for the inverted exponential distribution 反指数分布的一些估计方法
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2009-12-15 DOI: 10.1071/SP09013
G. Prakash
{"title":"Some estimation procedures for the inverted exponential distribution","authors":"G. Prakash","doi":"10.1071/SP09013","DOIUrl":"https://doi.org/10.1071/SP09013","url":null,"abstract":"The objective of the present paper is to study the properties of different types of estimators for the parameter of an inverted exponential model. Several distributional properties of the lower record values of the model are also discussed.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115881089","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}
引用次数: 5
Assessing the potential of kava (Piper methysticum Forst) and wild kava (Piper aduncum L.) as organic amendments for managing root-knot nematodes 评价卡瓦(Piper methysticum forest)和野生卡瓦(Piper aduncum L.)作为管理根结线虫的有机添加剂的潜力
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08005
Sunil Kumar Singh, U. Khurma
{"title":"Assessing the potential of kava (Piper methysticum Forst) and wild kava (Piper aduncum L.) as organic amendments for managing root-knot nematodes","authors":"Sunil Kumar Singh, U. Khurma","doi":"10.1071/SP08005","DOIUrl":"https://doi.org/10.1071/SP08005","url":null,"abstract":"Kava (Piper methysticum Forst) and wild kava (Piper aduncum L.) were evaluated for their efficacy against root-knot \u0000nematodes. Plant materials were tested as soil additive in pot trials at 2% and 4% concentrations for 0, 1 and 2 week \u0000degradation periods. Effects on the root-knot nematode, M. incognita, and its host, tomato, were recorded. All the tested \u0000materials reduced the number of galls compared to the control. Generally, maximum gall suppression was achieved at \u0000higher concentration (4%) and with no degradation time. Gall suppression was directly related to concentrations of plant \u0000materials, but not with the degradation time after soil incorporation. Kava powder, kava peelings and kava kosa caused \u0000maximum gall suppression but were phytotoxic. Kava stem, kava leaf and wild kava leaf, on the other hand, resulted in \u0000lower gall suppression but enhanced plant growth. These plant species are good candidates for further trials as soil \u0000amendments.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114258123","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}
引用次数: 1
Antibacterial potentiality and phytochemical analysis of mature leaves of Polyalthia longifolia (Magnoliales: Annonaceae) 长叶蓼成熟叶的抗菌潜能及植物化学分析(木兰科)
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08011
A. Ghosh, B. Das, S. Chatterjee, G. Chandra
{"title":"Antibacterial potentiality and phytochemical analysis of mature leaves of Polyalthia longifolia (Magnoliales: Annonaceae)","authors":"A. Ghosh, B. Das, S. Chatterjee, G. Chandra","doi":"10.1071/SP08011","DOIUrl":"https://doi.org/10.1071/SP08011","url":null,"abstract":"The present study evaluated the antibacterial potentiality of hot aqueous and methanol solvent extract of mature leaves of Polyalthia longifolia (Sonn.) Thwaites (Magnoliales: Annonaceae) against six reference bacteria viz. Staphylococcus aureus MTCC 2940, Bacillus subtilis MTCC 441, Escherichia coli MTCC 739, Klebsiella pneumoniae MTCC 530, Proteus vulgaris MTCC 426 and Enterobacter aerogenes MTCC 111. A sensitivity test performed with commercially available sensitivity test disks resulted in the appearance of multiple drug resistance phenotypes as all the tested bacteria are resistant to amoxycillin, cloxacillin, penicillin G and ampicillin. Most effective antibiotic against bacteria includes ofloxacin against S. aureus and K. pneumoniae; cephalexin against P. vulgaris; ciprofloxacin against E. coli and B. subtilis; kanamycin against E. aerogenes. When antibacterial potentiality of hot aqueous and methanol solvent extract of mature leaves of P. longifolia was evaluated against the bacteria, highest antibacterial activity was observed against K. pneumoniae in both the extracts followed by E. coli in hot aqueous extract and B. subtilis in methanol extract as evident from MIC values. Chromatographic analysis of the methanol extract of P. longifolia revealed the presence of steroids, alkaloids, biterpenoids, carbohydrates, amino acids, essential oil, phenolics and flavonoids as major phytochemicals.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115374795","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}
引用次数: 67
Effect of Integrated Nutrient Supply on Crop Productivity and Residual Nutrient Status under Pearlmillet-Wheat Cropping System in Semi arid Environment 半干旱环境下综合养分供应对珠麦种植系统作物生产力和剩余养分状况的影响
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08008
Pawan Kumar, R. K. Nanwal, S. Yadav, V. Rana
{"title":"Effect of Integrated Nutrient Supply on Crop Productivity and Residual Nutrient Status under Pearlmillet-Wheat Cropping System in Semi arid Environment","authors":"Pawan Kumar, R. K. Nanwal, S. Yadav, V. Rana","doi":"10.1071/SP08008","DOIUrl":"https://doi.org/10.1071/SP08008","url":null,"abstract":"","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128589804","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}
引用次数: 0
A Preliminary Identification of Cyanophyta/Cyanobacteria in the brackish milkfish ponds of Marakei, Nikunau and Kiritimati Atolls, Republic of Kiribati 基里巴斯共和国Marakei、Nikunau和Kiritimati环礁咸淡水遮目鱼池塘蓝藻/蓝藻的初步鉴定
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08010
T. Tebano
{"title":"A Preliminary Identification of Cyanophyta/Cyanobacteria in the brackish milkfish ponds of Marakei, Nikunau and Kiritimati Atolls, Republic of Kiribati","authors":"T. Tebano","doi":"10.1071/SP08010","DOIUrl":"https://doi.org/10.1071/SP08010","url":null,"abstract":"Common cyanophyta/cyanobacteria from the milkfish ponds of Marakei, Nikunau and Kiritimati atolls are species of Lyngbya and Spirulina. Those found on Marakei and Nikunau only include Chroococcus minutus, and species of Microcystis, Oscillatoria and Spirulina. Chroococus minor and Chroococus sp. were identified from Marakei, Nikunau and Kiritimati, respectively. Phormidium muricola (associated with Microcystis aeruginosa) and Phormidium sp. are found on Marakei and Kiritimati, respectively. Those found on Marakei only include Anabaena, Coelosphaerium kuetzingianum (dominant), Microcystis aeruginosa (co-dominant) and Merismopedia. The taxa found on Nikunau only include Dactylococcopsis, Nodularia and Raphidiopsis. Those found on Kiritimati only include Chlorogloea (dominant) with codominants Aphanothece, Johannesbaptistia, Chroococcidiopsis, Dunaliella, Coccochloris and Leptolyngbya.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125331109","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}
引用次数: 3
Time series aerial photographs to detect spatio-temporal changes in coastal areas of Fiji 用于探测斐济沿海地区时空变化的时间序列航空照片
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08009
G. Gienko, J. Terry, Lanieta V. Tokalauvere
{"title":"Time series aerial photographs to detect spatio-temporal changes in coastal areas of Fiji","authors":"G. Gienko, J. Terry, Lanieta V. Tokalauvere","doi":"10.1071/SP08009","DOIUrl":"https://doi.org/10.1071/SP08009","url":null,"abstract":"Time series of aerial photographs, which are reasonably widely available in the Pacific Island countries, provide a useful resource of geospatial data and can be used for the detection and quantitative assessment of spatio-temporal changes in the most dynamic coastal areas, which are often economically and culturally valuable, but also vulnerable to the effects of natural and anthropogenic stresses. Quantitative analysis, based on GIS and advanced image processing, is the most precise but time-consuming method. In many cases, visual detection and preliminary assessment of changes is a rational way to decide quickly whether more sophisticated techniques should be employed to map spatial changes in more detail. This paper elaborates on different techniques available for rapid change detection and analysis using time series of aerial photographs. The rationale and applicability of such methods are illustrated in a feasibility study that was implemented to detect changes since the mid-1960s in mangrove cover in the Korotogo area of the Coral Coast, on the southern coast of the main island of Fiji.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122620748","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}
引用次数: 0
Assessing the extent of diversity among noni (Morinda citrifolia L.) genotypes of Morobe Province, Papua New Guinea 巴布亚新几内亚莫罗贝省诺丽(Morinda citrifolia L.)基因型多样性程度评估
The South Pacific Journal of Natural and Applied Sciences Pub Date : 2008-12-01 DOI: 10.1071/SP08002
J. Waki, T. Okpul, M. Komolong
{"title":"Assessing the extent of diversity among noni (Morinda citrifolia L.) genotypes of Morobe Province, Papua New Guinea","authors":"J. Waki, T. Okpul, M. Komolong","doi":"10.1071/SP08002","DOIUrl":"https://doi.org/10.1071/SP08002","url":null,"abstract":"The extent of morphological variation among extant noni (Morinda citrifolia: Rubiaceae) genotypes was assessed using 58 polymorphic traits. A total of 39 mature noni trees were sampled from five sites within the vicinity of Lae, Morobe Province, Papua New Guinea. Cluster analysis identified five homogenous clusters, and was able to separate the three known botanical varieties namely, M. citrifolia var. citrifolia, M. citrifolia var. bracteata and M. citrifolia var. potteri as distinct morphotypes. Ordination of the data revealed traits such as young shoot pigmentation, stem diameter, angle of insertion of primary branch on main stem, stipule shape, heterostyly, occurrence of pistillate florets, fruit shape, occurrence of floral bracts, fruit width, and peduncle positioning at maturity as having greater contributions to the observed variation. Although the genetic nature of these traits is yet to be elucidated, occurrence of floral bract and fruit branching were observed to be transitional between the botanical varieties, and may shed light on their origins. The 58 descriptor states showed varying levels of polymorphism, however, the significant (P<0.01) correlations observed between numerous traits provide an element of caution in the development of a descriptor list, particularly when considering stability of the traits and the sample size. The results obtained in this study provided useful information for the standardisation of the developed descriptor list comprising of 49 polymorphic descriptor states, and for future diversity studies in noni.","PeriodicalId":148381,"journal":{"name":"The South Pacific Journal of Natural and Applied Sciences","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116111527","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}
引用次数: 11
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