CHLOROPHYLL FORMATION IN THE LEAVES OF TRADESCANTIA GUIANENSIS IN THE DARK,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
An experimental study completed by the authors seems to refute the generally accepted concept of the biosynthesis of chlorophyll in the dark by only some algae and young sprouts of Gymenospermae. Some previous studies of other authors are reviewed and discussed which may hint at the possibility of chlorophyll biosynthesis in the dark by Angiospermae. The present study consisted of growing Tradescantia shoots in the dark for a long period of 1 12-2 months. The results indicated that the elongated and etiolated stem of the plant contained no chlorophyll however, the leaves newly formed on this stem were green and contained chloroplasts. These chloroplasts were smaller in size, but more numerous than those of the control plant. The experiment confirmed that at least one Angiospermae plant is capable of producing chlorophyll in the dark.