The Metabolism of Amides and Amino Acids in Etiolated Seedlings of Lupinus Luteus L.

Venekamp, J. H.

doi:10.1111/j.1438-8677.1955.tb00353.x

Cited by 6 publications

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“…The relatively large amounts of aspartateasparagine in the cotyledons of plants from both treatments was probably indicative of the breakdown of amino acids so the carbon skeleton could be used for other metabolic activities, and the subsequent incorporation of ammonia into organic molecules perhaps as a detoxification mechanism, as suggested in Chibnall's review (1939). The idea of such detoxification, however, was questioned by Venekamp (1955). Alternatively, it may be a plant process for concentration of nitrogen for translocation.…”

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The Effect of Light on the Use of the Nitrogen Reserves of Germinating Soybean Seeds

Hurst

Sudia

1973

American J of Botany

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Light affects the mobilization and distribution of several of the storage components of the cotyledons of germinating soybean seeds. The nitrogen content of the cotyledons began to decrease during the first day of germination, continued through day 12 for plants in the light, and day 14 for those in the dark. Cotyledons from both treatments had lost about the same amount of nitrogen by day 14. Plants from both treatments lost about the same amount of dry weight by day 8, but those in the light had taken up nitrogen from the nutrient solution; while those in the dark showed no increase. The plants in the light had higher concentrations of soluble amino nitrogen in the cotyledons than did those in the dark, but the opposite was true for the seedling axis. Aspartate and its amide accounted for half or more of the total free amino acids in all parts of dark-grown plants at 6 and 14 days. In the light-grown plants aspartate and asparagine usually accounted for less than half of the total free amino acids in all plant parts except the cotyledons at 6 and 14 days. Total soluble amino acids were much lower in these plants than those in the dark, excepting the cotyledons.

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