Chapter 1 - Light use and leaf gas exchange

Printer-friendly version


Chloroplasts dividing (dumbell figures) within an enlarging cell of a young spinach leaf, resulting in about 200 chloroplasts per cell at leaf maturity (Nomarski optics). (Light micrograph courtesy John Possingham)

...leaves seem also designed for many other noble and important services, plants very probably drawing thro' their leaves some part of their nourishment from the air. May not light also, by freely entring the expanded surfaces of leaves and flowers, contribute much to ... ennobling the principles of vegetables?...

(Stephen Hales, Vegetable Staticks, 1727)