We plan to equip our growth chamber with LED for both in vitro culture and whole plant growth in soil. Does anyone have experience with that and what would be the conditions you recommend (LED maker, light spectrum, intensity, etc.)?
Certainly red light is an important aspect (especially for photosynthesis) but by itself can have crucial negative effects on proper plant functioning. Blue light is also important to be included ( in a lower percentage than red; check natural spectrum composition) for more proper plant functioning (e.g. stomatal conductance), anatomy (hydraulic conductance) and morphology (depending on the plant species). Far-red (in very low fluence rate) is also an important component of the natural light spectrum. I would certainly go for the combination of red, blue and far-red LED's (with adjustable voltage to be able to control the light intensities independently for each light colour) or a combination of white light LEDs with an addition of far-red LEDs (if you are not interested in light quality research). There are well-known companies in lighting that are also involved in plant growth lighting research (e.g. philips).
Certainly red light is an important aspect (especially for photosynthesis) but by itself can have crucial negative effects on proper plant functioning. Blue light is also important to be included ( in a lower percentage than red; check natural spectrum composition) for more proper plant functioning (e.g. stomatal conductance), anatomy (hydraulic conductance) and morphology (depending on the plant species). Far-red (in very low fluence rate) is also an important component of the natural light spectrum. I would certainly go for the combination of red, blue and far-red LED's (with adjustable voltage to be able to control the light intensities independently for each light colour) or a combination of white light LEDs with an addition of far-red LEDs (if you are not interested in light quality research). There are well-known companies in lighting that are also involved in plant growth lighting research (e.g. philips).