Influence of 2,4-Dichlorophenoxyacetic Acid on Solute Uptake by Chlorella.

germinated within 24 hours after prior exposure either to blue light or when maintained under complete darkness. However, far-red light augmented the germination of seeds pretreated with 6-benzylaminopurine so that nearly all such seeds germinated within 24 hours after treatment (table II). Far-red light also augmented the rate of germination of seed pretreated with a synergistic mixture of 6-benzylaminopurine and gibberellin. Lowering the temperature of germination to 250 C caused an appreciable increase in the rate of germination and augmented the synergistic effect of purines and gibberellin in combination. Such alternate stimuli for augmenting the same biological response could serve as protective mechanisms to insure germination of a certain percentage of seeds even under unfavorable environmental conditions.