Tropical agriculture and development最新文献

{"title":"Response of Soybean to Salinity::III. Water Status and Accumulation of Mineral Ions","authors":"M. A. Mannan, M. Karim, M. Haque, Q. Khaliq, H. Higuchi, E. Nawata","doi":"10.11248/JSTA.56.117","DOIUrl":"https://doi.org/10.11248/JSTA.56.117","url":null,"abstract":"Our previous studies indicated that soybean genotypes displayed wide genotypic variations in their salt tolerance. The present experiment was initiated to analyze the pattern of changes in accumulation of different mineral ions and water relation traits associated with salinity in two soybean genotypes, differing considerably in their relative salt tolerance. AGS 313 (salt-tolerant) and Shohag (moderately susceptible) were grown in pots filled with soil and treated with 0, 50 and 100 mM NaCl solutions till maturity. Grain yield and yield associated characters, accumulation of mineral ions, such as Na + , K + and Ca 2+ in different plant parts and water relation traits, such as relative water content (RWC), water retention capacity (WRC), leaf water potential and exudation rate (ER) at 15, 30, 45, 60 days after treatment imposition and at harvest were measured. NaCl salinity affected markedly the grain yield and yield associated characters of the two soybean genotypes. However, Shohag was more affected by the salinity than AGS 313. The grain yield of the genotype AGS 313 was 56% and 32 %, whereas that of Shohag was only 22% and 13% at 50 mM and 100 mM NaCl, respectively. The grain yield reduction by salinity was attributed to the reduction in the number of pods per plant, number of seeds per pod and 100-grain weight. However, the number of pods per plant was most affected compared to the other characters. Salinity increased the content of Na + while it decreased that of K + and Ca 2+ in all the plant parts. The increase in Na + content and decrease in the accumulation of the other mineral ions due to salinity became larger with the plant age. Except for roots, Na + accumulation in different plant parts of Shohag was much higher than that of AGS 313 in all the measurements. However, K + and Ca 2+ accumulation in different plant parts of AGS 313 was substantially higher than that in Shohag. Moreover, under saline conditions, in AGS 313, the values of RWC, WRC, leaf water potential and ER were higher at all the levels of salinity and plant age than Shohag. It was concluded that the relatively high salt tolerance of AGS 313 was associated with the limited accumulation of sodium and high accumulation of different mineral ions in different plant parts, as well as the maintenance of better water relations under salinity than in the case of Shohag.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117239053","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":"Calibration and Validation of Two Crop Models for Estimating Sugarcane Yield in Northeast Thailand","authors":"Preecha Kapetch, K. Sakai, Kobkiat Pisanjaroen, Taksina Sansayawichai, Toshiyuki Cho, Shinya Nakamura, Tamotsu Nakandakari","doi":"10.11248/JSTA.60.31","DOIUrl":"https://doi.org/10.11248/JSTA.60.31","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117286404","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":"Varietal Differences in Thermal Response of Passion Fruit Pollen Germination","authors":"H. Matsuda, T. Ogata","doi":"10.11248/JSTA.64.90","DOIUrl":"https://doi.org/10.11248/JSTA.64.90","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127088175","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":"Effects of Nitrogen Form and Concentration in Fertilizer on Vegetative Growth, Flowering, and Leaf Mineral Contents of Passion Fruit","authors":"T. Kondo, H. Higuchi","doi":"10.11248/JSTA.56.123","DOIUrl":"https://doi.org/10.11248/JSTA.56.123","url":null,"abstract":"In passion fruit, little information is available about the effect of the form of N fertilizer on vegetative growth and flowering. Nutrient solutions containing 5, 10, 25, or 50 mM N with an NH4-N:NO3-N ratio of 100:0, 75:25, 50:50, 25:75, or 0:100 were applied to passion fruit grown in sand to determine the appropriate ratio for vegetative growth and flowering. Vegetative growth, SPAD value, photosynthetic and transpiration rates, flower number, and leaf mineral contents were examined. SPAD value and photosynthetic rate decreased and necrosis was observed following the pure application of 25 and 50 mM NH4-N; in addition, the vine dry weight decreased at 50 mM. With additional NO3-N, the plants were able to avoid the detrimental effects of NH4-N. The N ratio did not affect vegetative growth except for the application of NH4-N alone, and no visible damage was observed, while the photosynthetic rate increased as the NO3-N ratio increased at N concentrations of ≥25 mM. At less than 10 mM N, symptoms of N deficiency were observed. The flower number increased as the NH4-N ratio increased. NH4-N should not be applied alone to passion fruit; however, an NH4-N-dominant fertilizer consisting of ≥50% NH4-N is recommended to promote reproductive growth without reducing vegetative growth.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123445022","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":"Effect of Cold Stress on Root Growth, Accumulation of Soluble Proteins and Free Amino Acids of Sheath Blight-Resistant Rice Genotype 32R","authors":"H. V. Kiệt, A. Nose, Shao-hui Zheng","doi":"10.11248/JSTA.60.191","DOIUrl":"https://doi.org/10.11248/JSTA.60.191","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123549921","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":"Fluorescent Staining and FISH of rDNA of Pitaya (Hylocereus spp.) Chromosomes","authors":"Masashi Yamamoto, Y. Shimajiri, K. Nashima, Toshiya Yamamoto","doi":"10.11248/JSTA.64.212","DOIUrl":"https://doi.org/10.11248/JSTA.64.212","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126728900","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":"Genotype-environment interaction in chickpea (C. arietinum L.) for adaptation to humid temperate and semi-arid tropical environments","authors":"J. Kashiwagi, L. Krishnamurthy, P. Gaur, T. Umezaki, Shao-hui Zheng, Y. Hiraoka, T. Terauchi, K. Iwama","doi":"10.11248/JSTA.52.89","DOIUrl":"https://doi.org/10.11248/JSTA.52.89","url":null,"abstract":"Eight chickpea genotypes were evaluated for seed yield and maturity time at three temperate locations in Japan and one semi-arid tropical location in India over a two-year period to obtain baseline information on chickpea adaptation to Japan. The average seed productivity under Japanese environments, except in the northern area with growth under cool and semi- humid climatic conditions and a longer photoperiod, was lower than that in the semi-arid tropical environment in India. The kabuli chickpeas, especially, ICCV 92311 and ICCV 92337, showed a higher productivity in northern Japan. For chickpea cultivation in Japan, it is recommended to adopt modified agronomic practices to reduce humidity in the crop canopy, for example, wider plant spacing, cultivation under rain shelter, and selection of genotypes with a high assimilate remobilization rate as well as resistance to higher humidity-promoted diseases. Growing chickpea crop in the northern part of Japan by adopting such agronomic practices and the right genotypes could be suitable. However, a larger number of studies should be carried out to analyse the various mechanisms that contribute to a better adaptation of chickpea to environments with a high soil moisture and humidity.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115988491","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":"Analysis of Food Security among Rain-fed Lowland Rice-Farming Households in Rural Areas of Lao PDR: A Daily Calorie Intake Approach","authors":"I. Siliphouthone, K. Yasunobu, A. Ishida","doi":"10.11248/JSTA.60.14","DOIUrl":"https://doi.org/10.11248/JSTA.60.14","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116594218","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":"Identification of Acerola (Malpighia glabra L.) Accessions by SRAP Markers","authors":"Akihiro Ito, Yukina Kajiwara, Shota Kanmera, K. Ishihata, K. Harada, T. Ogata, Kubo Tatsuya, S. Tominaga, Masashi Yamamoto","doi":"10.11248/JSTA.58.30","DOIUrl":"https://doi.org/10.11248/JSTA.58.30","url":null,"abstract":"Acerola (synonyms: West Indian cherry, Barbados cherry, and Puerto Rico cherry) (Malpighia glabra L., synonyms: M. punicifolia L. and M. emarginata DC) is an evergreen fruit tree that originated in the Central America. Acerola fruit has a high commercial value since it contains large amounts of ascorbic acid and polyphenols known as functional components (Asenjo and Guzman, 1946; Moscoco, 1956; Hanamura et al., 2005, 2008). Acerola harbors several cultivars with characteristic traits because superior clones or seedlings have been selected (Ledin, 1956; Brooks and Olmo, 1972; Clark and Finn, 2006; Cavalcante et al., 2007). However, the lineage of many cultivars is unknown, and their genetic relationships have not been elucidated. Recently, morphological and DNA analyses have been used to characterize the acerola germplasm (Salla et al., 2002; Chowdhury et al., 2005). Among the various PCR-based DNA analysis methods, sequence-related amplified polymorphism (SRAP), which preferentially amplifies open reading frames (ORFs), is a simple and efficient marker system (Li and Quiros, 2001). In fruit trees as well, this technique has been used to analyze genetic diversity and for phylogenetic studies (Ahmad et al., 2004; Guo and Luo, 2006; Uzun et al., 2009). In the present study, therefore, we used SRAP analysis to identify each accession and to elucidate phylogenetic relationships of acerola in our germplasm collection. Materials and Methods","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129864609","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":"Introduction of Thanakha (Limonia acidissima) and a Diversified Farming System into Yinmarbin Township, Sagaing Region, Myanmar","authors":"M. Yee, E. Nawata","doi":"10.11248/JSTA.60.137","DOIUrl":"https://doi.org/10.11248/JSTA.60.137","url":null,"abstract":"In the Dry Zone of Myanmar, the traditional upland farming systems were able to secure people’s home consumption with adaptability to the environment, in addition to providing income. In the recent decades, local people there considered the introduction of new cash crops to increase the yield and income compared to those in the conventional cropping systems. Kyauk Pyote village, one of the typical upland crop-producing villages in Yinmarbin Township, Sagaing Region was studied for the introduction of thanakha (Limonia acidissima), a highly promising cash crop with adaptability to the agro-environment in the Dry Zone, based on farm household interviews and field observations. In this area, sesame, pigeon pea and tomato were traditionally cultivated for daily foods and basic household needs. The local people introduced thanakha and diversified their farming systems for food and income security, and crop diversification might generate a higher income and contribute to rural development. Although commercial cultivation has widely expanded in the surveyed area with villagers’ expectation, the introduction of thanakha is at a trial stage and has not produced profits yet.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130527896","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}