Studies on the effect of the relative humidity of the atmosphere on the growth and physiology of rice plants - effects of ambient humidity in the dark period on the growth and the translocation of 13C-labelled photosynthetic products.

摘要

Rice seedlings were grown for 10 days at 75% relative humidity in the light period and 60, 75 or 90% humidity in the dark. Dry matter production was greater when dark humidity was higher. High humidity in the dark also increased leaf area, accelerated leaf emergence, and increased 13C assimilation and the translocation of photosynthates to the youngest leaf. High humidity in the dark promoted photosynthesis by increasing water content, but did not affect dark respiration.