GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Material
Publisher
Person/Organisation
Language
Years
FID
Subjects(RVK)
  • 1
    Online Resource
    Online Resource
    Association of “Greenness” in Corn with Yield and Leaf Nitrogen Concentration
    Wiley ; 2011
    In:  Agronomy Journal Vol. 103, No. 2 ( 2011-03), p. 529-535
    Details
    In: Agronomy Journal, Wiley, Vol. 103, No. 2 ( 2011-03), p. 529-535
    Abstract: Efficient use of N fertilizer has become crucial due to fertilizer costs and the impact of excessive N on the environment. Diagnostic tools for estimating plant N status have an important role in reducing N inputs while maintaining yield. The objective of our study was to quantify corn ( Zea mays L.) leaf greenness with a digital camera and image‐analysis software and establish the relationship with yield, leaf N concentration, and chlorophyll meter (or SPAD, soil plant analysis development) values. In 2008 and 2009, field experiments were conducted at five sites with N treatments ranging from 0 to 336 kg N ha −1 At tasseling, the ear leaf was sampled for color analysis and SPAD measurements, and then analyzed for total N. Hue, saturation, and brightness (HSB) values from digital images were processed into a dark green color index (DGCI), which combines HSB values into one composite number. Including calibration disks in images and changing the background color in photographs to pink greatly improved DGCI precision in 2009 over 2008. There was a close relationship (typically r 2 ≥ 0.70) of SPAD and DGCI with leaf N concentration. Within a location, yield increased linearly in most cases with both SPAD (average r 2 = 0.79) and DGCI (average r 2 = 0.78). Digital‐image analysis was a simple method of determining corn N status that has potential as a diagnostic tool for determining crop N needs.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj2010.0296
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 1471598-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Interference between hemp sesbania ( Sesbania exaltata ) and soybean ( Glycine max ) in response to irrigation and nitrogen
    Cambridge University Press (CUP) ; 1997
    In:  Weed Science Vol. 45, No. 1 ( 1997-02), p. 91-97
    Details
    In: Weed Science, Cambridge University Press (CUP), Vol. 45, No. 1 ( 1997-02), p. 91-97
    Abstract: Soybean yield loss from weed interference depends upon weed density and competitiveness of crop and weed species in response to environment. Soil water availability and nitrogen fertility were evaluated for their effect on competitiveness of individual species in field experiments. Early-season temperatures in 1995, which were cool compared to 1994, slowed hemp sesbania growth without affecting soybean growth. This resulted in negligible competition with soybean by hemp sesbania at densities of 3 or 6 plants m −2 . In 1994, hemp sesbania grew above the soybean canopy, decreasing soybean light interception 29 to 68%, and reducing soybean yield 30 to 48%. Fertilizer nitrogen increased soybean competitiveness, as indicated by biomass production, only in irrigated plots with hemp sesbania at 3 m −2 , but did not affect soybean yield. Apparently, competition for light is a primary cause of soybean yield loss from hemp sesbania infestations. In growth chamber studies, simulating temperatures from the field, hemp sesbania growth was stimulated more by warm temperatures than was soybean. Hemp sesbania and soybean dry weights increased 4.4- and 2.7-fold, respectively, at 30/20 C day/night temperatures compared to 25/15 C.
    Type of Medium: Online Resource
    ISSN: 0043-1745 , 1550-2759
    URL: Article
    DOI: 10.1017/S0043174500092523
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1997
    detail.hit.zdb_id: 2123881-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Confirmation of delayed canopy wilting QTLs from multiple soybean mapping populations
    Springer Science and Business Media LLC ; 2015
    In:  Theoretical and Applied Genetics Vol. 128, No. 10 ( 2015-10), p. 2047-2065
    Details
    In: Theoretical and Applied Genetics, Springer Science and Business Media LLC, Vol. 128, No. 10 ( 2015-10), p. 2047-2065
    Type of Medium: Online Resource
    ISSN: 0040-5752 , 1432-2242
    URL: Article
    DOI: 10.1007/s00122-015-2566-1
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2015
    detail.hit.zdb_id: 1478966-8
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Drought tolerance and yield increase of soybean resulting from improved symbiotic N2 fixation
    Elsevier BV ; 2007
    In:  Field Crops Research Vol. 101, No. 1 ( 2007-2), p. 68-71
    Details
    In: Field Crops Research, Elsevier BV, Vol. 101, No. 1 ( 2007-2), p. 68-71
    Type of Medium: Online Resource
    ISSN: 0378-4290
    URL: Article
    DOI: 10.1016/j.fcr.2006.09.010
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2007
    detail.hit.zdb_id: 2012484-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Inhibition of N2 Fixation in Soybean Is Associated with Elevated Ureides and Amino Acids
    Oxford University Press (OUP) ; 2005
    In:  Plant Physiology Vol. 137, No. 4 ( 2005-04-01), p. 1389-1396
    Details
    In: Plant Physiology, Oxford University Press (OUP), Vol. 137, No. 4 ( 2005-04-01), p. 1389-1396
    Abstract: Decreased N2 fixation in soybean (Glycine max) L. Merr. during water deficits has been associated with increases in ureides and free amino acids in plant tissues, indicating a potential feedback inhibition by these compounds in response to drought. We evaluated concentrations of ureides and amino acids in leaf and nodule tissue and the concurrent change in N2 fixation in response to exogenous ureides and soil-water treatments for the cultivars Jackson and KS4895. Exogenous ureides applied to the soil and water-deficit treatments inhibited N2 fixation by 85% to 90%. Mn fertilization increased the apparent catabolism of ureides in leaves and hastened the recovery of N2 fixation following exogenous ureide application for both cultivars. Ureides and total free amino acids in leaves and nodules increased during water deficits and coincided with a decline in N2 fixation for both cultivars. N2 fixation recovered to 74% to 90% of control levels 2 d after rewatering drought-stressed plants, but leaf ureides and total nodule amino acids remained elevated in KS4895. Asparagine accounted for 82% of the increase in nodule amino acids relative to well-watered plants at 2 d after rewatering. These results indicate that leaf ureides and nodule asparagine do not feedback inhibit N2 fixation. Compounds whose increase and decrease in concentration mirrored the decline and recovery of N2 fixation included nodule ureides, nodule aspartate, and several amino acids in leaves, indicating that these are potential candidate molecules for feedback inhibition of N2 fixation.
    Type of Medium: Online Resource
    ISSN: 1532-2548 , 0032-0889
    URL: Article
    DOI: 10.1104/pp.104.056317
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2005
    detail.hit.zdb_id: 2004346-6
    detail.hit.zdb_id: 208914-2
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Association mapping identifies loci for canopy coverage in diverse soybean genotypes
    Springer Science and Business Media LLC ; 2018
    In:  Molecular Breeding Vol. 38, No. 5 ( 2018-5)
    Details
    In: Molecular Breeding, Springer Science and Business Media LLC, Vol. 38, No. 5 ( 2018-5)
    Type of Medium: Online Resource
    ISSN: 1380-3743 , 1572-9788
    URL: Article
    DOI: 10.1007/s11032-018-0810-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 1478220-0
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    DIVERSITY AND IMPLICATIONS OF SOYBEAN STEM NITROGEN CONCENTRATION
    Informa UK Limited ; 2013
    In:  Journal of Plant Nutrition Vol. 36, No. 14 ( 2013-12-06), p. 2111-2131
    Details
    In: Journal of Plant Nutrition, Informa UK Limited, Vol. 36, No. 14 ( 2013-12-06), p. 2111-2131
    Type of Medium: Online Resource
    ISSN: 0190-4167 , 1532-4087
    URL: Article
    DOI: 10.1080/01904167.2012.748800
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2013
    detail.hit.zdb_id: 2057445-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Total Nitrogen Determination in Plant Material by Persulfate Digestion
    Wiley ; 1996
    In:  Agronomy Journal Vol. 88, No. 1 ( 1996-01), p. 111-113
    Details
    In: Agronomy Journal, Wiley, Vol. 88, No. 1 ( 1996-01), p. 111-113
    Abstract: Determination of total plant N concentration is important in understanding crop nutritional value, nutritional requirements, and physiological responses to the environment. Nitrogen analysis by either the Kjeldahl or Dumas method is expensive and requires specialized equipment. An alternative procedure, developed primarily for use on water samples, was optimized for digestion of vegetative soybean [ Glycine max (L.) Merr.] tissue and compared with the Dumas method. Finely ground plant material (0.425 mm) was digested in alkaline potassium persulfate (K 2 S 2 O 8 ) at 120°C (0.1 MPa) for 1.5 h in an autoclave, converting organic N to NO ‐ 3 . Nitrate in the digest was reduced to NO ‐ 2 and quantified by the sulfanilamide‐α‐naphthyl‐ethylenediamine dihydrochloride procedure. Persulfate digests of soybean material agreed closely with determinations made by the Dumas method ( r = 0.99). Digestion of NIST standard tomato ( Lycopersicon esculentum Mill.) leaves (4.8 g N 100 g −1 ) indicated complete N recovery (4.9 ± 0.1 g N 100 g −1 ). Persulfate digestion of total plant N was accurate and precise, and required little initial investment.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj1996.00021962008800010023x
    Language: English
    Publisher: Wiley
    Publication Date: 1996
    detail.hit.zdb_id: 1471598-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    A Possible Relationship Between Shoot N Concentration and the Sensitivity of N 2 Fixation to Drought in Soybean
    Wiley ; 2014
    In:  Crop Science Vol. 54, No. 2 ( 2014-03), p. 746-756
    Details
    In: Crop Science, Wiley, Vol. 54, No. 2 ( 2014-03), p. 746-756
    Abstract: Nitrogen fixation in soybean [ Glycine max (L.) Merr.] is sensitive to drought, but genotypic differences in sensitivity exist. The establishment of a link between an easily measured phenotypic trait and genotypic differences in drought sensitivity of N 2 fixation is crucial for screening large numbers of genotypes for drought tolerance. Previous work indicated that shoot N concentration of well‐watered soybean was related to differences among genotypes in relative N and biomass accumulation during drought. On the basis of USDA data for 2300 maturity group IV accessions, we requested seed for 175 accessions with good yield potential and low stem lodging scores. These accessions were evaluated under well‐watered conditions in field trials for shoot N concentration during reproductive development and for seed yield. Twelve accessions with good seed yield and extreme shoot N concentrations were evaluated in the growth chamber for acetylene reduction activity (N 2 fixation) in response to soil drying. From the seven accessions selected for low shoot N concentration, we identified two high‐yielding accessions with drought‐tolerant N 2 fixation. Genotypic differences for sensitivity of N 2 fixation to soil drying were strongly correlated with the concentrations of shoot N and shoot ureides under well‐watered conditions and with concentrations of shoot ureides under drought conditions. These data indicate that shoot N concentrations of well‐watered plants may be useful as an initial screening tool for evaluating soybean genotypes for drought‐tolerant N 2 fixation.
    Type of Medium: Online Resource
    ISSN: 0011-183X , 1435-0653
    URL: Article
    DOI: 10.2135/cropsci2013.04.0271
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 1480918-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Mapping and confirmation of quantitative trait loci (QTLs) associated with carbon isotope ratio (δ 13 C) in soybean
    Wiley ; 2020
    In:  Crop Science Vol. 60, No. 5 ( 2020-09), p. 2479-2499
    Details
    In: Crop Science, Wiley, Vol. 60, No. 5 ( 2020-09), p. 2479-2499
    Abstract: Insufficient moisture availability often limits soybean [ Glycine max (L.) Merr.] yield. Carbon isotope ratio (δ 13 C) provides an integrated measure of water use efficiency in C 3 plants due to its substantial genetic variance, high heritability, and small genotype × environment interaction (G × E). The objective of this study was to identify quantitative trait loci (QTLs) associated with δ 13 C using a recombinant inbred line population derived from a cross between ‘KS4895’ and ‘Jackson’. The field experiment was conducted in five environments to evaluate δ 13 C under rainfed and irrigated conditions. Analysis of variance of δ 13 C averaged over environment and irrigation treatment showed significant effects of genotype (G), environment (E), and G × E interactions. Heritability of δ 13 C in different environments and irrigation treatments ranged from 66 to 79%. Averaged over environments and irrigation treatments, heritability was 83%. A total of 24 QTLs associated with δ 13 C were identified and clustered in nine genomic regions on seven chromosomes. The QTL clusters on Gm05 (1), Gm06 (2) and Gm20 (1) were detected across different environments and irrigation regimes. Collectively, these four QTL clusters accounted for 55% of the phenotypic variation in δ 13 C. The QTLs on Gm06 and Gm20 also showed additive × additive epistasis that contributed approximately 4.2% to the total phenotypic variation. Several identified δ 13 C QTLs overlapped with QTLs associated with other physiological traits related to plant water status, biological nitrogen fixation, and plant morphology. The identified genomic regions may be an important resource in genomic selection studies to improve drought tolerance in soybean.
    Type of Medium: Online Resource
    ISSN: 0011-183X , 1435-0653
    URL: Issue
    URL: Article
    DOI: 10.1002/csc2.v60.5
    DOI: 10.1002/csc2.20240
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1480918-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...