Embodiments described herein provide systems for optimizing organism growth, destruction or repair, by controlling the duty cycle, wavelength band and frequency of photon bursts to an organism, through the high frequency modulation of photons in an individual color spectrum to the organism, where the photon modulation is based upon the specific needs of the organism. Devices for the optimization of organism growth, destruction or repair through the high frequency modulation of photons of individual color spectrum to the organism are also provided. Further provided are methods for the optimization of organism growth, destruction or repair through the use of high frequency modulation of photons of individual color spectrums.

Embodiments described herein provide systems for optimizing organism growth, destruction or repair, by controlling the duty cycle, wavelength band and frequency of photon bursts to an organism, through the high frequency modulation of photons in an individual color spectrum to the organism, where the photon modulation is based upon the specific needs of the organism. Devices for the optimization of organism growth, destruction or repair through the high frequency modulation of photons of individual color spectrum to the organism are also provided. Further provided are methods for the optimization of organism growth, destruction or repair through the use of high frequency modulation of photons of individual color spectrums.

A method of treating a plant by irradiating the plant with light in a wavelength range of 300 nm to 325 nm at a fluence of 4,000 mol/m.sup.2 to 50,000 mol/m.sup.2, while a fluence of light in a wavelength range of 290 nm or less irradiated to the plant is less than 20% of that of the light in the wavelength range of 300 nm to 325 nm. Alternatively, the plant is not irradiated with light at any wavelength of 290 nm or less; and then the plant is infected with a microorganism.

A method of treating a plant by irradiating the plant with light in a wavelength range of 300 nm to 325 nm at a fluence of 4,000 mol/m.sup.2 to 50,000 mol/m.sup.2, while a fluence of light in a wavelength range of 290 nm or less irradiated to the plant is less than 20% of that of the light in the wavelength range of 300 nm to 325 nm. Alternatively, the plant is not irradiated with light at any wavelength of 290 nm or less; and then the plant is infected with a microorganism.

Methods for decreasing flowering time and accelerating crop cycle in plants and increasing the number of breeding cycles per year in such plants are provided. The methods comprise using far-red light alone or in combination with additional external signals such as photoperiod in order to decrease flowering time and accelerate seed to seed crop cycle. Also provided are methods for bypassing vernalization requirements in winter annuals.

Methods for decreasing flowering time and accelerating crop cycle in plants and increasing the number of breeding cycles per year in such plants are provided. The methods comprise using far-red light alone or in combination with additional external signals such as photoperiod in order to decrease flowering time and accelerate seed to seed crop cycle. Also provided are methods for bypassing vernalization requirements in winter annuals.

Provided herein are methods, compositions, and devices relating to administration of UV-B to a seed.

Provided herein are methods, compositions, and devices relating to administration of UV-B to a seed.

A light source for plant cultivation and a plant cultivation method are provided. The plant cultivation method includes planting germinated seeds of a plant; and growing the plant by applying light treatment to the plant. In growing the plant, main light treatment of supplying main light to the plant and dark treatment of cutting off supply of the main light to the plant are alternated. The main light has at least two peak wavelengths in the visible light spectrum. In addition, the main light has a PPFD of greater than 92 mol/m.sub.2/s to less than 198 mol/m.sup.2/s.

The present disclosure relates to the field of algal cultivation and biofuels. Particularly, the present disclosure relates to a method of enhancing lipid production during algal culturing. Particularly, the present disclosure relates to a method of enhancing neutral lipid and total lipid production by maintaining algae in a thin layer cultivation system and exposing said algae maintained in the thin layer cultivation system to infra-red (IR) radiation. Said method enhances lipid accumulation in algae, thereby increasing the yield of neutral lipids and total lipids. The method is simple, cost-effective in producing high quantities of algal-derived biofuels, requires shorter time duration for lipid induction and results in no or minimal reduction of biomass.