Abstract
Terrestrial plants respond to environments. Modification of leaf anatomies by light intensity, known as sun and shade leaves, is the one of such responses. The anatomical, ecological, and physiological differences between sun and shade leaves have been studied.
We have also shown how Chenopodium album L. plants sense light conditions for morphogenesis of new leaves. The plants sensed the light intensity by mature leaves but by developing leaves, thus there would be a long-distance signalling pathway from mature to developing leaves.
However, very fundamental comparative development of sun and shade leaves has not been studied. We analysed developmental processes of sun and shade leaves (grown in 360 and 60 μmol quanta m-2 s-1 PPFD respectively)in detail using the leaf plastochron index.
