Promotion of Leaf Growth by Short Days in the Short-Day Plant Chenopodium amaranticolor

Abstract

PAST investigations into the relationship between length of day, flowering and leaf-growth have failed to explain the complex interactions between them. In most, if not all, plants the development of flower buds is associated with a reduction in leaf-growth and eventually leads to bract formation¹, and Bünning and Konder² have shown that leaf growth in plants maintained in a vegetative state is less for inductive than non-inductive conditions in the short- and long-day plants they studied. On the other hand some results obtained by Schwabe³ seem on re-examination to indicate a promotion of leaf-growth by inductive conditions in Xanthium.