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  • Triticum aestivum  (77)
  • Springer  (77)
  • American Chemical Society
  • American Meteorological Society
  • Nature Publishing Group
  • Springer Nature
  • 1985-1989  (50)
  • 1975-1979  (27)
  • 1970-1974
  • 1960-1964
  • 1950-1954
  • 1988  (24)
  • 1985  (26)
  • 1977  (12)
  • 1976  (15)
  • 1974
  • 1971
  • 1961
  • 1953
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Keywords
Publisher
  • Springer  (77)
  • American Chemical Society
  • American Meteorological Society
  • Nature Publishing Group
  • Springer Nature
Years
  • 1985-1989  (50)
  • 1975-1979  (27)
  • 1970-1974
  • 1960-1964
  • 1950-1954
Year
  • 1
    Electronic Resource
    Electronic Resource
    Effect of wheat (Triticum aestivum) roots on mineralization rates of soil organic matter (1988)
    Springer
    Biology and fertility of soils 7 (1988), S. 67-70 
    Details
    ISSN: 1432-0789
    Keywords: Root activity ; Soil C mineralization ; 14C-labelled plant material ; Decomposition stages ; Wheat ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Two different soils were amended with 14C-labelled plant material and incubated under controlled laboratory conditions for 2 years. Half the samples were cropped with wheat (Triticum aestivum) 10 times in succession. At flowering, the wheat was harvested and the roots removed from the soil, and a new crop was started. Thus, the soil was continuously occupied by predominantly active root systems. The remaining samples were maintained without plants under the same conditions. The aim of the experiment was to study the effects of active roots on C-mineralization rates during different stages of decomposition and during long-term incubation. During the first 200 days, corresponding to the active decomposition stages, the roots weakly reduced 14C mineralization. With a lower level of decomposition, when more than 60% of the initial 14C was mineralized and when the available nutrients were markedly exhausted by plant uptake, the roots stimulated 14C mineralization.[/ p]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260735
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  • 2
    Electronic Resource
    Electronic Resource
    Root activity and carbon metabolism in soils (1988)
    Springer
    Biology and fertility of soils 7 (1988), S. 71-78 
    Details
    ISSN: 1432-0789
    Keywords: Root activity ; Rhizosphere ; C metabolism ; Microbial biomass ; Microbial activity ; Wheat ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Two different soils were amended with 14C-labelled plant material and incubated under controlled laboratory conditions for 2 years. Half the samples were cropped with wheat (Triticum aestivum) 10 times in succession. At flowering, the wheat was harvested and the old roots removed from the soil, so that the soil was continuously occupied by predominantly active root systems. The remaining samples were maintained without plants under the same conditions. During the initial stages of high microbial activity, due to decomposition of the labile compounds, the size of the total microbial biomass was comparable for both treatments, and the metabolic quotient (qCO2-C = mg CO2-C·mg−1 Biomass C·h−1) was increased by the plants. During the subsequent low-activity decomposition stages, after the labile compounds had been progressively mineralized, the biomass was multiplied by a factor of 2–4 in the presence of plants compared to the bare soils. Nevertheless, qCO2-C tended to reach similar low values with both treatments. The 14C-labelled biomass was reduced by the presence of roots and qCO2-14C was increased. The significance of these results obtained from a model experiment is discussed in terms of (1) the variation in the substrate originating from the roots and controlled by the plant physiology, (2) nutrient availability for plants and microorganisms, (3) soil biotic capacities and (4) increased microbial turnover rates induced by the roots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260736
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of biopores on root growth, water uptake and grain yield of wheat (Triticum aestivum) based on predictions from a computer model (1988)
    Springer
    Biology and fertility of soils 6 (1988), S. 315-321 
    Details
    ISSN: 1432-0789
    Keywords: Biopores ; Root growth ; Transpiration ; Simulations ; Mechanical impedance ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The use of vertical biopores by wheat (Triticum aestivum) seminal roots for easy access to the subsoil and the consequences for plant water supply and yield has been investigated by computer simulation. Parameters included were: biopore density and diameter, depth of cultivation and strength of the subsoil — all under a wide range of seasonal weather conditions. The model predicts that biopores add significantly to root penetration at depth, even at a density of 0.1% v/v of small, vertical pores, while 1.5% to 2.0% v/v can ensure maximum root penetration. When the growing season is shorter a larger number of biopores is needed to ensure timely root penetration to depth. With shallow tillage, biopores occur closer to the soil surface, and their importance is increased. Deeper root penetration invariably gives greater water uptake and transpiration, but may have a negative effect on grain yield, especially under the driest climatic conditions. An increase in early water use may result in less soil water being available during the grain-filling period. The effect of biopores on plant transpiration varies from year to year, depending on the amount of rain and its distribution in time, and on the amount of soil water stored at time of sowing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261020
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  • 4
    Electronic Resource
    Electronic Resource
    Nucleotide sequence and determination of the extremities of the 26S ribosomal RNA gene in wheat mitochondria: evidence for sequence rearrangements in the ribosomal genes of higher plants (1988)
    Springer
    Current genetics 13 (1988), S. 75-82 
    Details
    ISSN: 1432-0983
    Keywords: Triticum aestivum ; Plant mitochondrial DNA ; Ribosomal genes ; Sequence rearrangements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The nucleotide sequence of the wheat mitochondrial 26S ribosomal RNA gene and flanking regions was determined and compared with mitochondrial 26S rRNA genes from maize and Oenothera. All three genes exhibit a high degree of homology except within two variable regions. When the plant mitochondrial 26S rRNA genes are compared with Escherichia coli 23S rRNA and chloroplast 23S and 4.5S rRNA genes, a third variable region is apparent close to the 3′ end of the gene. The 5′ and 3′ ends of the wheat mitochondrial gene were determined by S1 nuclease mapping. Computer analysis of the wheat mitochondrial gene revealed several small sequences present either in the 5′ region of the 26S rRNA gene or in the 18S rRNA gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365760
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  • 5
    Electronic Resource
    Electronic Resource
    Evidence for a direct relationship between mitochondrial genome organization and regeneration ability in hexaploid wheat somatic tissue cultures (1988)
    Springer
    Current genetics 14 (1988), S. 387-394 
    Details
    ISSN: 1432-0983
    Keywords: Triticum aestivum ; Genomic variability ; Mitochondrial DNA ; Somatic tissue culture ; Regeneration ability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Embryogenic and non-embryogenic long-term callus cultures of hexaploid wheat exhibit differences in the organization of their mitochondrial genome. Embryogenic and non-embryogenic fractions of callus cultures initiated from immature embryos of the wheat cultivar “Chinese Spring” have been isolated and subsequently subcultured. DNA-DNA hybridization experiments using labelled cloned wheat mitochondrial DNA fragments have shown that the mitochondrial DNA organization of embryogenic subcultures derived from embryogenic parts of “Chinese Spring” calli is closely related to that of the initial “Chinese Spring” calli, while non-embryogenic subcultures derived from non-embryogenic fragments of “Chinese Spring” calli exhibit a mitochondrial DNA organization similar to that found in non-embryogenic calli derived from cultivar “Aquila”. In addition, somatic tissue cultures initiated from three other non-embryogenic wheat cultivars (“Talent”, “Thésée” and “Capitole”) display mitochondrial DNA arrangements similar to those found in cultivar “Aquila”. These results strongly suggest that, in wheat callus cultures, a particular mitochondrial genome organization is correlated with the ability of cultured cells to regenerate whole plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00419997
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  • 6
    Electronic Resource
    Electronic Resource
    Cytological aspects of in vitro androgenesis in wheat (Triticum aestivum L.) using fluorescent microscopy (1988)
    Springer
    Sexual plant reproduction 1 (1988), S. 217-222 
    Details
    ISSN: 1432-2145
    Keywords: Triticum aestivum ; Cytology ; In vitroandrogenesis ; Fluorescent microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two winter wheat genotypes (‘Diószegi 200’ and ‘Mv 15’) were compared for their in vitro androgenic capacity. On average, the induction frequency of embryogenic structures was 71.7% in ‘Diószegi 200’ and only 4.3% in ‘Mv 15’. The haploid induction ability of the two genotypes differed considerably, with ‘Diószegi 200’ being much higher. The difference in the in vitro inductability of the microspores may result from genetic differences which are manifested in the survival rate of the microspores during the culture period and their adaptability to in vitro conditions. Special DNA fluorochrornes were suitable for studying the different pathways of in vitro androgenesis. Our data indicate that the repeated equal divisions of the microspore nucleus might lead to pollen embryo formation, and subsequent divisions of the vegetative portion of the pollen grain after the first asymmetric microspore mitosis can result in pollen callus formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189155
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  • 7
    Electronic Resource
    Electronic Resource
    Infectivity and acetylene reduction of diazotrophic rhizosphere bacteria in wheat (Triticum aestivum) seedlings under gnotobiotic conditions (1985)
    Springer
    Biology and fertility of soils 1 (1985), S. 123-129 
    Details
    ISSN: 1432-0789
    Keywords: Rhizosphere bacteria ; Nitrogenase activity ; Triticum aestivum ; Inoculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Wheat seedlings were inoculated with rhizosphere nitrogen-fixing bacteria and grown gnotobiotically for 15 days. The growth medium consisted of semisolid agar with or without plant nutrients. The bacteria, isolated from roots of field-grown wheat, were three unidentified Gram-negative rods (A1, A2, E1), one Enterobacter agglomerans (C1) and two Bacillus polymyxa (B1, B2). A strain of Azospirillum brasilense (USA 10) was included for comparison. Nitrogenase activity (acetylene reduction activity, ARA) was tested on intact plants after 8 and 15 days of growth. In semisolid agar without plant nutrients, five isolates showed ARA of 0.01–0.9 nmol C2H4 plant−1 h−1, while the two strains of B. polymyxa had higher ARA of 3.3–10.6 nmol C2H4 plant−1 h−1. Plant development was not affected by inoculation with bacteria, except that inoculation with B. polymyxa resulted in shorter shoots and lower root weight. Transmission electronmicroscopy of roots revealed different degrees of infection. A. brasilense, A1 and A2, occurred mainly in the mucilage on the root surface and between outer epidermal cells (low infectivity). B. polymyxa strains and E1 were found in and between epidermal cells (intermediate infectivity) while E. agglomerans invaded the cortex and was occasionally found within the stele (high infectivity).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301779
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  • 8
    Electronic Resource
    Electronic Resource
    Identification of wheat (Triticum aestivum L.) chromosomes with genes controlling the level of nitrate reductase, nitrite reductase, and acid proteinase using the Chinese Spring-Hope substitution lines (1976)
    Springer
    Biochemical genetics 14 (1976), S. 905-912 
    Details
    ISSN: 1573-4927
    Keywords: chromosome substitution ; nitrate reductase ; nitrite reductase ; acid proteinase ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The levels of nitrate reductase, nitrite reductase, and acid proteinase were compared in the primary leaves of 8-day-old wheat seedlings of Chinese Spring, Hope, and the 21 disomic substitution lines of Hope in Chinese Spring. Two chromosomes, 7B and 7D, were considered to contain genes controlling the level of nitrate reductase. Substitution of Hope chromosome 7B caused a highly significant increase in the in vitro stability of nitrate reductase. Nitrite reductase appeared to be controlled by two major genes, located on chromosomes 4D and 7D, and two minor genes, located on chromosomes 3D and 5A. In the case of acid proteinase, substitution of chromosome 1D caused a significant reduction in enzyme activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00485123
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  • 9
    Electronic Resource
    Electronic Resource
    Genetic analysis of Triticeae shikimate dehydrogenase (1988)
    Springer
    Biochemical genetics 26 (1988), S. 287-301 
    Details
    ISSN: 1573-4927
    Keywords: shikimate dehydrogenase ; electrophoresis ; isoelectric focusing ; isozymest ; Triticeae ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Starch gel electrophoresis and polyacrylamide gel isoelectric focusing (IEF) were used to investigate the genetic control of Triticeae shikimate dehydrogenase-1 (SKDH-1). Studies of wheat-alien species chromosome addition lines established thatSkdh-1 ofHordeum vulgare cv. Betzes is located in chromosome 5H,Skdh-V1 ofDasypyrum villosum in 5V,Skdh-R1 ofSecale cereale cvs. Dakold and King II in 5R, andSkdh-S 11 ofTriticum longissimum in 5S1S. Also, the chromosomal locations of the genes that encode SKDH-1 inT. aestivum cv. Chinese Spring,T. umbellulatum, andS. cereale cv. Imperial, determined earlier using zone electrophoresis, were reconfirmed using IEF. Zone electrophoresis and IEF do not differ markedly in their ability to detect the expression of alienSkdh-1 genes in wheat-alien species chromosome addition lines. However, IEF may be superior to zone electrophoresis as a technique for detecting and analyzing SKDH-1 genetic variants within Triticeae species; among the species studied, IEF generally resolved two or more isozymes perSkdh-1 allele present, while zone electrophoresis resolved only one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00561467
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  • 10
    Electronic Resource
    Electronic Resource
    Localization and nucleotide sequence of the gene for the 8 kDa subunit of photosystem I in pea and wheat chloroplast DNA (1988)
    Springer
    Plant molecular biology 11 (1988), S. 311-319 
    Details
    ISSN: 1573-5028
    Keywords: chloroplast gene ; iron-sulphur protein ; psaC ; Pisum sativum ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The gene for the 8 kDa subunit of photosystem I has been located in the small single copy region of wheat chloroplast DNA by coupled transcription-translation of cloned fragments of DNA and by DNA sequence analysis. The pea gene for this subunit was located in pea chloroplast DNA by using the wheat gene as a probe. The location was confirmed by immunoprecipitation of the products of coupled transcription-translation of cloned DNA with antiserum raised against the small subunits of pea photosystem I and by DNA sequence analysis. The deduced amino acid sequences of the pea and wheat proteins are identical in seventy-six out of the eighty-one amino acid residues. There are nine conserved cysteine residues, eight of which are arranged in the primary structure in a similar way to those in bacterial ferredoxins containing two 4Fe-4S centres, suggesting that the polypeptide binds iron sulphur centres A and B of photosystem I.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027388
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