ISRN Agronomy最新文献_第2页

Response of Maize Seedlings to Cadmium Application after Different Time Intervals 不同时间间隔玉米幼苗对镉施用的响应

ISRN Agronomy Pub Date : 2013-06-02 DOI: 10.1155/2013/169610

I. Hussain, S. Akhtar, M. Ashraf, R. Rasheed, E. H. Siddiqi, M. Ibrahim

{"title":"Response of Maize Seedlings to Cadmium Application after Different Time Intervals","authors":"I. Hussain, S. Akhtar, M. Ashraf, R. Rasheed, E. H. Siddiqi, M. Ibrahim","doi":"10.1155/2013/169610","DOIUrl":"https://doi.org/10.1155/2013/169610","url":null,"abstract":"Present study was conducted to appraise the inhibitory effects of cadmium applied at different time intervals on various growth and biochemical parameters in two maize lines, Maize-TargetedMutagenesis 1 and 2 (MTM-1 and MTM-2). Twenty-day-old seedlings were exposed to 0, 3, 6, 9, and 12 mg CdCl2 kg−1 sand. Both maize lines exhibited significant perturbations in important biochemical attributes being employed for screening the crops for cadmium tolerance. The results showed that a higher concentration of cadmium (12 mg CdCl2 kg−1) considerably reduced the plant growth in line MTM-1 on the 5th, 10th, and 15th day after the treatment. In contrast, irrespective of exposure time, the plant biomass and leaf area did not show inhibitory effects of cadmium, specifically at 3 mg CdCl2 kg−1 in line MTM-2. In addition, MTM-2 was found to be more tolerant than line MTM-1 in terms of lower levels of hydrogen peroxide (H2O2), malondialdehyde (MDA) contents, and relative membrane permeability (RMP). Moreover, H2O2, MDA, RMP, and anthocyanin increased at all levels of cadmium in both lines, but a significant decline was observed in photosynthetic pigments, total free amino acids, and proline contents in all treatments particularly on the 10th and 15th day after treatment.","PeriodicalId":413640,"journal":{"name":"ISRN Agronomy","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114961763","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: 30

Resistance to Phomopsis Seed Decay in Soybean 大豆种子腐烂抗性研究

ISRN Agronomy Pub Date : 2013-04-22 DOI: 10.1155/2013/738379

Shuxian Li, Pengyin Chen

引用次数: 10

Effects of Media Formulation on the Growth and Morphology of Ectomycorrhizae and Their Association with Host Plant 培养基配方对外生菌根生长形态的影响及其与寄主植物的关联

ISRN Agronomy Pub Date : 2013-03-12 DOI: 10.1155/2013/317903

F. Islam, S. Ohga

{"title":"Effects of Media Formulation on the Growth and Morphology of Ectomycorrhizae and Their Association with Host Plant","authors":"F. Islam, S. Ohga","doi":"10.1155/2013/317903","DOIUrl":"https://doi.org/10.1155/2013/317903","url":null,"abstract":"Tricholoma matsutake and Rhizopogon roseolus form ectomycorrhizal (ECM) association with their host plant on natural habitats. The main objective of this study was to test mycelial growth, morphology, and host plant survival both in vitro and in vivo when treated with enriched media. Aseptically germinated seedlings of Pinus densiflora and P. thunbergii were inoculated with the strains of T. matsutake and R. roseolus, respectively. Under in vitro conditions mycelial growth rates performed best on pH 5 and were better on Modified-Melin-Norkrans-(MMN) based medium and Potato Dextrose Agar (PDA); addition of micronutrients and vitamins in MMN mycelial growth rates had 6–27% differences. Without ECM, plant survival rates on standard media were 30% to below 30% and by inclusion of elements they were 50% to 80%. On in vivo, soil containing different media with ECM allowed successful mycorrhizal association and increased seedling survival rates approximately 100%. Our findings confirm that MMN and PDA allowed higher mycelial growth but poor plant survival (<30%); however, enriched media supported 100% plant survival with successful ECM associations. The present method is advantageous in terms of giving objectivity for ECM by employing suitable media for strains and host plant, and making it possible for mass production of ECM-infected seedlings.","PeriodicalId":413640,"journal":{"name":"ISRN Agronomy","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116068909","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: 6

Management of Palmer Amaranth (Amaranthus palmeri) in Glufosinate-Resistant Soybean (Glycine max) with Sequential Applications of Herbicides 抗草铵膦大豆(Glycine max)中紫花苋(Amaranthus palmeri)的序贯除草剂管理

ISRN Agronomy Pub Date : 2012-12-06 DOI: 10.5402/2012/131650

Amy E. Hoffner, D. Jordan, Aman Chandi, A. C. York, E. J. Dunphy, W. Everman

{"title":"Management of Palmer Amaranth (Amaranthus palmeri) in Glufosinate-Resistant Soybean (Glycine max) with Sequential Applications of Herbicides","authors":"Amy E. Hoffner, D. Jordan, Aman Chandi, A. C. York, E. J. Dunphy, W. Everman","doi":"10.5402/2012/131650","DOIUrl":"https://doi.org/10.5402/2012/131650","url":null,"abstract":"Palmer amaranth (Amaranthus palmeri S. Wats.) is one of the most difficult weeds to control in soybean (Glycine max (L.) Merr.) in North Carolina. Research was conducted during 2010 and 2011 to determine if Palmer amaranth control and soybean yield were affected by soybean plant population and combinations of preemergence (PRE) herbicides followed by a single application of glufosinate postemergence (POST) versus multiple applications of glufosinate POST. Palmer amaranth was controlled more and soybean yield was greater when soybean was established at 483,000 plants in 3 of 4 experiments compared with soybean at 178,000 plants irrespective of herbicide treatments. In separate experiments, application of PRE herbicides followed by POST application of glufosinate or multiple POST applications of glufosinate provided variable Palmer amaranth control, although combinations of PRE and POST herbicides controlled Palmer amaranth the most and provided the greatest soybean yield. In 1 of 3 experiments, sequential applications of glufosinate were more effective than a single application. Yield was higher in 2 of 3 experiments when glufosinate was applied irrespective of timing of application when compared with the nontreated control. In the experiment where glufosinate was applied at various POST timings, multiple applications of the herbicide provided the best control and the greatest yield compared with single applications.","PeriodicalId":413640,"journal":{"name":"ISRN Agronomy","volume":"234 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132855628","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: 13

Applying the Successional Weed Management Model for Revegetating a Yellow Starthistle-Infested Dryland Pasture in the Chihuahuan Desert 应用杂草演替管理模式对奇瓦瓦沙漠黄星蓟生长的旱地牧场进行恢复

ISRN Agronomy Pub Date : 2012-12-01 DOI: 10.5402/2012/213289

William D. Sommers, L. Howery, R. Pendleton, Richard Lee, B. Pendleton

引用次数: 1

Foliar Spray of Nitrogen Fertilizer on Raised Bed Increases Yield of Transplanted Aman Rice over Conventional Method 垄作床叶面喷施氮肥较常规方法可提高移栽阿曼水稻产量

ISRN Agronomy Pub Date : 2012-11-20 DOI: 10.5402/2012/184953

M. Bhuyan, Mst. R. Ferdousi, M. Iqbal

{"title":"Foliar Spray of Nitrogen Fertilizer on Raised Bed Increases Yield of Transplanted Aman Rice over Conventional Method","authors":"M. Bhuyan, Mst. R. Ferdousi, M. Iqbal","doi":"10.5402/2012/184953","DOIUrl":"https://doi.org/10.5402/2012/184953","url":null,"abstract":"Bed planting with foliar nitrogen fertilizer application of rice production systems is very new, and research on it is still at introductory phase. Influence of foliar application of nitrogen fertilizer on growth and yield of transplanted aman rice and evaluation of water and fertilizer application efficiency of rice-fallow-rice cropping system were investigated under raised bed cultivation method. Results showed that foliar spray in bed planting method increased grain yield of transplanted aman rice up to 9.33% over conventional method. Foliar nitrogen fertilizer application in bed planting method increased the number of panicle m−2, number of grains panicle−1, and 1000-grain weight of rice than the conventional method. Sterility percentage and weed infestation were lower at foliar nitrogen fertilizer application in bed planting method than the conventional method. Thirty-nine percent of irrigation water and time for application could be saved through foliar nitrogen spray in bed planting than conventional method. Water use efficiency for grain and biomass production was higher by foliar nitrogen fertilizer application in bed planting than conventional method. Likewise, agronomic efficiency of foliar nitrogen fertilizer application in bed planting method was higher than the conventional method. This study concluded that foliar nitrogen spray in bed planting method is a new approach to get fertilizer and water use efficiency as well as higher yield compared to existing agronomic practice in Bangladesh.","PeriodicalId":413640,"journal":{"name":"ISRN Agronomy","volume":"529 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116210763","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: 21

Switchgrass (Panicum virgatum L.) cultivar adaptation, biomass production, and cellulose concentration as affected by latitude of origin. 产地纬度对柳枝稷品种适应性、生物量产量和纤维素浓度的影响

ISRN Agronomy Pub Date : 2012-10-24 DOI: 10.5402/2012/763046

P. Jefferson, andW. Paul McCaughey

{"title":"Switchgrass (Panicum virgatum L.) cultivar adaptation, biomass production, and cellulose concentration as affected by latitude of origin.","authors":"P. Jefferson, andW. Paul McCaughey","doi":"10.5402/2012/763046","DOIUrl":"https://doi.org/10.5402/2012/763046","url":null,"abstract":"Ten cultivars of switchgrass (Panicum virgatum L.) of northern and southern origins that had demonstrated adaptation to North Dakota were evaluated for biomass production, cellulose concentration, and nutritive value in the southern Canadian prairie region: Saskatchewan and Manitoba. In this region, cultivars adapted to northern latitudes present interest for biomass production. Latitude of origin of the cultivars was positively correlated to stand density (, ), biomass production (, ), and cellulose (, ), and negatively correlated with organic matter digestibility (, ) and N (, ). Dacotah and ND 3743, the northern origin cultivars, were more persistent in Brandon, MB (94 to 100% stand density) and exhibited higher cellulose and hemicellulose concentrations than southern cultivars. Southern cultivars produced higher biomass than northern-origin cultivars until they suffered significant stand and biomass decline. Cave-in-Rock, the southern origin cultivar, did not persist in the third year after seeding. However, southern-adapted cultivars exhibited better nutritive value for grazing cattle. We conclude that switchgrass production in the southern Canadian prairie should utilize the USA cultivars from northern latitudes or adapted Canadian cultivars should be developed.","PeriodicalId":413640,"journal":{"name":"ISRN Agronomy","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121515449","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: 19

Cultivar and Growing Location Effects on Fatty Acids and Minerals in White Lupin Sprouts 品种和生长地点对白露芽中脂肪酸和矿物质的影响

ISRN Agronomy Pub Date : 2012-10-18 DOI: 10.5402/2012/232349

H. Bhardwaj, A. Hamama

引用次数: 4

Growth and Physiological Responses of Maize and Sorghum Genotypes to Salt Stress 玉米和高粱基因型对盐胁迫的生长和生理响应

ISRN Agronomy Pub Date : 2012-10-16 DOI: 10.5402/2012/145072

G. Niu, Wenwei Xu, D. Rodriguez, Youping Sun

引用次数: 47

Bacterial and Yeast Endophytes from Poplar and Willow Promote Growth in Crop Plants and Grasses 杨树和柳树的细菌和酵母内生菌促进作物植物和草的生长

ISRN Agronomy Pub Date : 2012-10-15 DOI: 10.5402/2012/890280

Z. Khan, Grant Guelich, Ha Phan, R. Redman, S. Doty

引用次数: 77