Plant Root最新文献_第9页

The rice RCN1/OsABCG5 mutation is associated with root de-velopment in response to nutrient shortage 水稻RCN1/OsABCG5突变与根系在营养短缺条件下的发育有关

IF 0.6

Plant Root Pub Date : 2012-01-01 DOI: 10.3117/PLANTROOT.6.28

A. Ureshi, Shuichi Matuda, Emiko Ohashi, K. Onishi, I. Takamure, K. Kato

引用次数: 7

IRRI’s drought stress research in rice with emphasis on roots: accomplishments over the last 50 years 国际水稻研究所的干旱胁迫研究，重点是根系:过去50年的成就

IF 0.6

Plant Root Pub Date : 2011-12-20 DOI: 10.3117/PLANTROOT.7.92

A. Henry

{"title":"IRRI’s drought stress research in rice with emphasis on roots: accomplishments over the last 50 years","authors":"A. Henry","doi":"10.3117/PLANTROOT.7.92","DOIUrl":"https://doi.org/10.3117/PLANTROOT.7.92","url":null,"abstract":"Early recognition of the importance of roots for drought resistance, and the diversity in rice root architecture, provided a strong foundation for drought research at the International Rice Research Institute (IRRI). IRRI was founded in 1960, and large efforts for research on root growth in response to drought were ongoing by the mid-1970s, with an emphasis on deep root growth, formation of coarse nodal roots, and the root pulling force method. In the 1980s, aeroponic studies on root morphology and anatomy and line-source sprinkler field studies were commonly conducted. The use of crosses to better understand the genetics of root traits started in the 1980s. Further characterization of the genetics behind root traits was conducted in the 1990s, specifically the use of molecular markers to select for root trait QTLs. A shift toward rainfed lowland experiments in addition to upland conditions began in the 1990s, with increased recognition of the different types of drought stress environments and characterization of root water uptake. In the 2000s, drought breeding efforts moved from selection of root traits to direct selection for yield under drought. Today (the 2010s), we have identified two major drought-yield QTLs to be related to root traits, and phenotyping for association mapping of genes related to root traits and functions is underway. After direct selection for yield during the past decade that is now approaching impact at the farm level, we are seeing that root traits are indeed involved in improved yield under drought.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2011-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.7.92","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69622339","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: 28

Towards an empirical relationship between root length density and root number in windbreak-grown cadaghi (Corymbia torelliana) trees 防风林柽柳根长密度与根数关系的实证研究

IF 0.6

Plant Root Pub Date : 2011-11-30 DOI: 10.3117/PLANTROOT.5.40

B. Tamang, M. Andreu, C. Staudhammer, D. Rockwood, S. Jose

{"title":"Towards an empirical relationship between root length density and root number in windbreak-grown cadaghi (Corymbia torelliana) trees","authors":"B. Tamang, M. Andreu, C. Staudhammer, D. Rockwood, S. Jose","doi":"10.3117/PLANTROOT.5.40","DOIUrl":"https://doi.org/10.3117/PLANTROOT.5.40","url":null,"abstract":"Because windbreaks are planted for sustainable agriculture but may lower crop yields near them due to competition, suitable competi- tion mitigation methods must be applied at the windbreak-crop interface to increase crop yields. Effective underground competition management requires information on important root variables such as preferential root growth direction and root length density (RLD, root length per unit volume of soil). This study examined root isotropy (i.e., uniformity in all directions) in windbreak- grown cadaghi (Corymbia torelliana) trees in south Florida and developed an empirical relationship between RLD and number of roots (N) per unit of surface of soil exiting the trench face. Numbers of roots exiting the frontal face parallel to the windbreak (NX), vertical face perpendicular to the frontal face (NY), and basal horizontal face (NZ) of 10 x 10 x 10 cm soil cubes were counted. Cadaghi roots were anisotropic and had horizontal growth preference. Average root numbers were ranked NX>NY>NZ. Both NX and the average root number exiting X, Y and Z faces of the soil cube (NAVG) were significant variables for estimating RLD. The coefficients of NX and NAVG were 1.1 and 3.1. These results should be helpful to manage underground competition effectively at the windbreak-crop interface to improve crop yields.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.5.40","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69621743","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

Study on rhizosphere bacterial community in lowland rice grown with organic fertilizers by using PCR-denaturing gradient gel electrophoresis 利用聚合酶链反应-变性梯度凝胶电泳技术研究施用有机肥的水稻根际细菌群落

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.5

Tetsuya Doi, J. Abe, F. Shiotsu, S. Morita

{"title":"Study on rhizosphere bacterial community in lowland rice grown with organic fertilizers by using PCR-denaturing gradient gel electrophoresis","authors":"Tetsuya Doi, J. Abe, F. Shiotsu, S. Morita","doi":"10.3117/PLANTROOT.5.5","DOIUrl":"https://doi.org/10.3117/PLANTROOT.5.5","url":null,"abstract":"For the promotion of environment-friendly agriculture, use of organic fertilizers and green materials is increasingly attempted in rice farming. Although effects of organic fertilizers on soil bacteria in the rhizosphere can differ from those in non-rhizosphere soil, microbiological studies that specifically address the rice rhizosphere still limited. This study was undertaken to investigate the impact of organic fertilizers on soil bacteria communities through comparison of rhizosphere soils and bulk soils. Effects of soil types and seasonal change were also analyzed. Rice plants (Oryza sativa L. cv. Nipponbare) were cultivated in a lowland paddy field of Andosol soil. Applications of compost and rice bran in combination with chemical fertilizer were compared with control soil (chemical fertilizer only). Soil 16S rDNA extracted from rhizosphere soil collected using ultrasonic treatment of rice roots and from bulk soils were analyzed using PCR-denaturing gradient gel electrophoresis (DGGE). Principal component analysis based on PCR-DGGE profiles revealed clear differences in the community structures of soil bacteria between rhizosphere and bulk soils. Furthermore, rhizosphere bacterial community structures of compost and rice bran treatments were plainly different from that of control, and changed with the seasons. The organic fertilizers showed pronounced effects on bacterial communities until mid-summer, but small effects in autumn. Results of this study suggest that the rhizosphere microorganisms in paddy fields can be modified through organic fertilizer management. Moreover, effects of organic fertilizer application, soil type, and phenology on soil bacteria appear depending on interaction with the rice rhizosphere effects in paddy fields.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.5.5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69621814","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: 20

The effect of nitrate nitrogen and salicylic acid on aerenchyma formation in Typha angustifolia grown in mesocosms 硝酸盐氮和水杨酸对小叶蝉中胚层气孔形成的影响

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.25

A. Ratushnyak, Valentina I. Poluyanova, K. I. Abramova, M. G. Andreeva, A. Y. Ratushnyak, S. V. Berdnik, Maxim V. Trushin

引用次数: 1

Erratum: Impact of soil compaction on root architecture, leaf water status, gas exchange and growth of maize and triticale seedlings [Plant Root Vol. 3 (2009) 10-16] 土壤压实对玉米和小黑麦幼苗根系构型、叶片水分状况、气体交换和生长的影响[植物根系Vol. 3 (2009) 10-16]

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.24

M. Grzesiak

引用次数: 0

Publications from 2007 to 2010 in Plant Root: A retrospection 2007年至2010年发表于《植物之根:回顾》

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.1

I. Karahara

引用次数: 0

A GIS-based method for the analysis of digital rhizotron images 一种基于gis的数字根瘤苗图像分析方法

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.69

C. Gasch, T. Collier, S. Enloe, S. Prager

{"title":"A GIS-based method for the analysis of digital rhizotron images","authors":"C. Gasch, T. Collier, S. Enloe, S. Prager","doi":"10.3117/PLANTROOT.5.69","DOIUrl":"https://doi.org/10.3117/PLANTROOT.5.69","url":null,"abstract":"Quantification of belowground plant response via rhizotron root image analysis is difficult and time-consuming, yet a plant's root response is of great interest to many researchers. Here, we present an automated, time efficient method for examining digital rhizotron images. A total of 285 digital images (218 mm by 300 mm) were collected using a flatbed scanner from 16 rhizotron boxes from an experiment designed to evaluate the root response of Dalmatian toadflax, Linaria dalmatica (L.) Miller to herbivory by the Dalmatian toadflax stem mining weevil, Mecinus janthinus Germar, a widely used biological control agent. Images were quantified for root length and area using two methods: manually digitizing images using Root Measurement System (RMS) software, and semi- automated analysis using Feature Analyst™, an extension for a geographic information system. Feature Analyst length and area values were highly positively correlated with RMS area values, but were not correlated with RMS length measurements. The semi-automated Feature Analyst approach required one-eighth of the time required to analyze images using the manual RMS method. Feature Analyst for digital image analysis warrants more investigation, but appears to be a promising method for quantifying belowground plant characteristics.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.5.69","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69622521","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: 7

Quantity, vertical distribution and morphology of fine roots in Norway spruce stands with different stem density 不同茎密度挪威云杉林分细根数量、垂直分布及形态

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.46

S. Kucbel, P. Jaloviar, Jozef Špišák

{"title":"Quantity, vertical distribution and morphology of fine roots in Norway spruce stands with different stem density","authors":"S. Kucbel, P. Jaloviar, Jozef Špišák","doi":"10.3117/PLANTROOT.5.46","DOIUrl":"https://doi.org/10.3117/PLANTROOT.5.46","url":null,"abstract":"In the study, the influence of stand density on quantitative and morphological parameters of fine roots with the diameter less than 2 mm was analysed. The results confirmed the differences of the fine root distributions and the total fine root mass between stands with different density. The Norway spruce stand with lower stem density has a lower overall fine root mass but, at the same time, a higher fine root mass regarding the single tree. In the litter (Ol, Of-horizons), the fine roots are present only in the plot with higher density. The cumulative proportion of fine root biomass in the layer 0-10 cm reaches 67% in the plot with lower density and 78% in the plot with higher density. In the lower density plot, a lower proportion of fine roots in the diameter class under 0.25 mm was found in all analysed parameters. Specific root length, root surface area and root tissue density reflect the different diameter structure of fine roots in the surveyed plots. We suppose the stand density significantly affects the fine root system, espe- cially by the change of moisture regime in the litter and in the upper parts of the A-horizon. Despite the high fine root dynamics of single trees, the Norway spruce stand with the lower stem density is not able to effectively utilize the entire soil space.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.5.46","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69621796","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: 20

Stable diurnal growth rhythms modulate root elongation of Arabidopsis thaliana 稳定的生长节律调节拟南芥根系伸长

IF 0.6

Plant Root Pub Date : 2011-01-01 DOI: 10.3117/PLANTROOT.5.17

N. Yazdanbakhsh, J. Fisahn

引用次数: 17