抄録
We investigated the effect of dim light on the growth and photosynthetic ability of cabbage plug-transplants stored for 14 d at l0°C. Transplants stored in darkness were elongated succulently by etiolation, and their leaf chlorophyll content and photosynthetic rate decreased. Both intermittent and continuous lighting at a photosynthetic photon flux density (PPFD) of 10 μmol m-2 s-1 suppressed the succulent elongation. Longer photoperiod resulted in greater shoot elongation accompanied by dry matter deposition. The leaf chlorophyll content and photosynthetic rate in all lighting conditions remained higher than those in darkness. The photosynthetic rate in intermittent lighting was higher than that in continuous lighting. In intermittent lighting with a 1-h light/23-h dark cycle, the succulent elongation and the reduction of photosynthetic rate were suppressed to some extent at a PPFD from 0.5 to 10 μmol m-2 s-1. These results suggest that intermittent dim light could be used for preserving the quality of cabbage plug-transplants during low-temperature storage.
