Researches on plant respiration - III—The Relationship between the respiration in air and in nitrogen of certain seeds during germination (a) seeds in which fats constitute the chief food

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Abstract
Seedlings of Heltanthus annuus, Cucurbita pepo and Ricinus communis were successively maintained for periods in atmospheres of air, N and again air, and the effects of this treatment on their respiration intensities and R. Q.''s were measured. The change from air to N in all cases resulted in an initial rapid fall in CO2 output, followed by a continued but more gradual fall. The subsequent change from an atmosphere of N to one of air resulted in a rapid return to the normal aerobic respiration rate of* the seedlings. The change from N to air produced in the value of the R. Q. first a rapid fall to a low value followed by a rise to the normal aerobic value.

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