Leaf Growth Physiology

The expansion of leaves provides plants with surface area for catching sunlight and photosynthetic machinery for food production. Leaf growth is a highly integrated cellular activity, involving many cell types responding to a variety of environmental and internal cues. In particular, growth of dicotyledonous (broad) leaves relies on light signals to stimulate growth and to determine leaf shape and anatomy. It is likely that perception of light quality and quantity is meshed with hormonal status to determine how leaves will grow and develop.