Process of photomorphogenically enhancing plants
First Claim
1. A process of radiating a plant with limited spectrum ultraviolet light to induce photomorphogenic growth comprising:
- illuminating a light source to produce light with wavelengths extending between ultraviolet C (UVC) and infrared spectral regions;
maximizing ultraviolet B exposure and minimizing UVC exposure to light from said light source by transmitting the light from said light source through a single sheet of borosilicate glass having a thickness of between 1 and 10 millimeters, said single sheet of borosilicate glass being non-transmissive of at least 95% of the UVC and more permissive of remaining spectral regions, wherein said borosilicate glass has a point of inflection wavelength between 280 nanometers and 320 nanometers; and
exposing the plant to transmitted light to induce a photomorphogenic response induced by UVB exposure.
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Abstract
A process for photomorphogenically enhancing plants is presented wherein a natural or artificial light source emits light through a transmittive material. The material is optionally borosilicate glass with a steep edge situation at or near 280 nm so as to selectively filter out light in the UVC or low UVB regions. The glass allows high transmissibility such that as much as 98% of all light at or above the edge situation passes thorough the material. The percent transmission and edge situation may be defined by glass thickness or by combining multiple types of glass. The light is then contacted with a plant whereby a photomorphogenic response is elicited.
24 Citations
16 Claims
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1. A process of radiating a plant with limited spectrum ultraviolet light to induce photomorphogenic growth comprising:
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illuminating a light source to produce light with wavelengths extending between ultraviolet C (UVC) and infrared spectral regions; maximizing ultraviolet B exposure and minimizing UVC exposure to light from said light source by transmitting the light from said light source through a single sheet of borosilicate glass having a thickness of between 1 and 10 millimeters, said single sheet of borosilicate glass being non-transmissive of at least 95% of the UVC and more permissive of remaining spectral regions, wherein said borosilicate glass has a point of inflection wavelength between 280 nanometers and 320 nanometers; and exposing the plant to transmitted light to induce a photomorphogenic response induced by UVB exposure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification