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  • 1
    Electronic Resource
    Electronic Resource
    The influence of zinc and sulphur deficiency on oil-filling in peanut (Arachis hypogaea L.) kernels (1987)
    Springer
    Plant and soil 103 (1987), S. 261-267 
    Details
    ISSN: 1573-5036
    Keywords: Arachis hypogaea L. ; developing kernel ; lipid composition ; Zn and S deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In the developing peanut (Arachis hypogaea L.) kernels, the period between 15 and 35 days after podding (DAP) was identified as the active period of oil-filling. The period of active oil-filling was associated with a decrease in the starch, soluble sugars and proteins so as to make available the energy and carbon skeleton for the synthesis of oil. The oil content in the mature kernels decreased by 11, 12 and 25 per cent with Zn, S and Zn+S deficiency, respectively. In addition, proteins and starch content decreased significantly while that of soluble sugars increased slightly. The activity of malate dehydrogenase and glucose-6-phosphate dehydrogenase also decreased due to Zn as well as S deficiency. The deficiency treatments resulted in a decrease in phospholipids, free fatty acids and triacylglycerols in mature kernels. Further the proportion of 16∶0 and 18∶2 decreased while that of 18∶1 increased in developing kernels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370398
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Micronutrients and nitrogen metabolism (1987)
    Springer
    Plant and soil 103 (1987), S. 51-55 
    Details
    ISSN: 1573-5036
    Keywords: ammonium ; assimilation ; maize ; micronutrients ; nitrate ; nitrogen ; metabolism ; protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A sand-culture experiment was conducted to study the influence of a deficiency of and an excess of micronutrients on the uptake and assimilation of NH 4 + and NO 3 − ions by maize. By studying the fate of15N supplied as15NH4NO3 or NH4 15NO3, it was demonstrated that in maize plants NH4−N was absorbed in preference to NO 3 − −N. The uptake and distribution of N originating from both NH 4 + and NO 3 − was considerably modified by deficiency of, or an excess of, micronutrients in the growth medium. The translocation of NH 4 + −N from roots to shoots was relatively less than that of NO 3 − −N. Deficiency as well as excessive amounts of micronutrients, in the growth medium, substantially reduced the translocation of absorbed N into protein. This effect was more pronounced in the case of N supplied as NO 3 − . Amino-N was the predominant non-protein fraction in which N from both NH 4 + and NO 3 − tended to accumulate. The next important non-protein fractions were NO 3 − −N when N was supplied as NO 3 − and amide-N when NH 4 + was the source. The relative accumulation of15N into different protein fractions was also a function of imposed micronutrient levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370667
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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