What is the optimal wavelength of light for growing plants (cacti indoors in a northern illinois climate)?

Jonathan B. Marder marder at agri.huji.ac.il
Tue Oct 14 10:44:21 EST 1997


Benoit SCHOEFS wrote in message ...
...
+AD4-If plants are green that
+AD4-because they are not absorbing green light efficiently. They are most
+AD4-absorbing blue and red lights.

To completely accurate, plants are absorbing green light SLIGHTLY LESS
efficiently
than blue and red. In a crop canopy, the pathlength (though multiple
leaves) is long enough
that nearly all the green light is actually absorbed, and also USED for
photosynthesis.

Thus, plants are almost black. They're not red, not blue and +ACo-almost+ACo-
not green.

Jonathan B. Marder   +ADw-MARDER+AEA-agri.huji.ac.il+AD4-
Department of Agricultural Botany, The Hebrew University of Jerusalem
Faculty of Agriculture, P.O.Box 12, Rehovot 76100, ISRAEL
Phone: +-972 8 9481918   Fax:   +-972 8 9467763
Web page:    http://www.agri.huji.ac.il/+AH4-marder





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