On Mon, 4 Aug 2003 18:14:17 +1000, "John H." <john at faraway.com> wrote:
>>Currently doing some research on varying light frequency effects on
>biological thingees and noted this. Perhaps you should conduct your own
Yes. Your research lies in an area of great interest to me. I can
only say that any experiments I might perform will be on a tiny scale,
not worth publishing the results.
Conventional thinking in the horticultural world holds that blue light
is good for vegging, red light is good for fruiting. The article
below suggests a specific role for far-red light enegy.
Many who use artificial lighting to grow budding marijuana plants will
say the red light is all you need throughout the growth cycle if you
pour it on in sufficient quantities -- i.e., get a big sodium lamp and
forget the blue end of the spectrum.
But I am interested in what gets left behind when one takes that
approach. I tend to think it makes quite a difference in plant
chemistry, which is why I have always preferred outdoor dope. What
are your thoughts?
>>> EYELESS VISION
>> Tomatoes see red. And other colors, too! We touched on
>> this subject over a decade ago. (SF#54) Then we described
>> how the use of red plastic mulch greatly improves the
>> yields of tomato plants. More recent research reveals
>> that fruit quality and resistance to pests are also
>> improved. How can this be?
>> Plant leaves, it turns out, contain color sensors --
>> light-sensitive pigments similar to those it the human
>> retina. Obviously, the plants do not "see," but the
>> pigments provide environmental information. Here's the
>> mechanism: plant leaves reflect infrared light well, so
>> when a tomato plant's pigments detect a lot of infrared,
>> the plant "thinks" that it may be crowded out by
>> competing vegetation. The tomato plant responds
>> aggressively by growing more rapidly.
>> The red plastic mulch between the rows also reflects a
>> lot of infrared light, and it thereby tricks the tomato
>> plant into accelerating its growth.
>> (Raloff, Janet; "When Tomatoes See Red," Science News,
>> 152:376, 1997.)