Abstract
Spring barley seedling were grown in the dark for 21 d and respiration rates of the whole plant (including the seed), of the shoots, and of the roots were determined. A function describing the growth and maintenance components of respiration was interpolated through the experimental points and its parameters in plants under different mineral nutrition were compared. The plants grown in a complete nutrient solution showed the highest growth rate in the initial phase of development and thus reached the maximum respiration rate earlier than plants in the other variants. The highest proportion of substrate was respired in the shoot. Plants grown under deficiency of phosphorus and magnesium had a slower respiration rate than plants grown in the complete nutrient solution (NP), whereas the amount of respired substrate in plant parts was similar to that recorded in the NP plants. Plants grown in distilled water showed the lowest growth efficiency and respirated the highest proportion of substrate in the root.
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Sekerka, P., Nátr, L. & Čatský, J. The effect of mineral nutrition on the growth and maintenance components of respiration during heterotrophic growth of barley seedlings. Biol Plant 33, 439–447 (1991). https://doi.org/10.1007/BF02897716
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DOI: https://doi.org/10.1007/BF02897716