58 results about "Photosynthetic pigment" patented technology

Methods and compositions to temporarily delay the ripening, maturation, senescence and pathogen infection of produce such as fruits, vegetables and ornamental plants are provided. The methods involve the application of a photosynthetic pigment and / or membrane stabilizing chemical (e.g. glycine betaine) to produce which is identified as in need of such delay. Application may be prior to harvest, at or during harvest or post-harvest.

Quantum dot (QD) LEDs useful for plant, algael and photosynthetic bacterial growth applications. The QD LEDs utilizes a solid state LED (typically emitting blue or UV light) as the primary light source and one or more QD elements as a secondary light source that down-converts the primary light. The emission profile of the QD LED can be tuned to correspond to the absorbance spectrum of one or more photosynthetic pigments of the organism.

Methods and compositions to temporarily delay the ripening, maturation, senescence and pathogen infection of produce such as fruits, vegetables and ornamental plants are provided. The methods involve the application of a photosynthetic pigment and / or membrane stabilizing chemical (e.g. glycine betaine) to produce which is identified as in need of such delay. Application may be prior to harvest, at or during harvest or post-harvest.

The invention provides a weeding method for millet planting. The weeding method comprises the following steps: selecting millet seeds and soaking the millet seeds with brassinolide with the concentration of 0.001-1mg / L; spraying a weed killer with the concentration of 7.5mg / L in farms after seeding, and spraying the brassinolide with the concentration of 0.0125-0.4mg / L on foliages after 24 hours, wherein the weed killer is a water solution of iodosulfuron-methyl-sodium.mesosulfuron-methyl water dispersible granules and alkyl ethyl sulfonate at a weight ratio of 9 to 1. According to the weeding method, the seeds are soaked with the brassinolide solution, so that the plant height and biomass of the grown millets can be improved, and the photosynthetic pigment content in seeding leaves of the millets can be reduced to a certain extent. According to the weeding method, the seeds and seedlings of the millets are processed with the brassinolide, so that the resistance of the millets to the weed killer is improved; modernized operation in the millet planting is convenient; the application range of the existing weed killer is expanded.

The invention discloses a method for improving the drought resistance of oil paeonia suffruticosa by adopting jasmonic acid. The jasmonic acid is adopted to induce the oil paeonia suffruticosa to generate the drought resistance. The method comprises the following steps that 1), triennial oil paeonia suffruticosa seedlings which are consistent in growth vigor and free of plant diseases and insect pests are selected in October to be cultivated; 2), the triennial oil paeonia suffruticosa seedlings are cultured in a greenhouse at room temperature until May of the next year, and normal water management is carried out during the period; and 3), the jasmonic acid is sprayed to the whole oil paeonia suffruticosa plants until the upper and lower surfaces of leaves drip the jasmonic acid, the jasmonic acid is sprayed once every 3 days and is sprayed twice in total, and the drought-resistant oil paeonia suffruticosa is obtained. According to the method for improving the drought resistance of theoil paeonia suffruticosa by adopting the jasmonic acid, in the post-growth stage of the oil paeonia suffruticosa, the exogenous jasmonic acid with different concentrations is adopted for induction, the osmotic regulation substance content and the photosynthetic pigment content (the chlorophyll a content, the chlorophyll b content and the carotenoid content) of the oil paeonia suffruticosa under drought stress are remarkably improved, the malondialdehyde content is reduced, the cell membrane lipid peroxidation degree is reduced, photosynthesis of the paeonia ostii is promoted, and the defense capability of the paeonia ostii on drought stress is enhanced.

A method for determining the photosynthetic pigment content of oilseed rape pod skin includes the steps of (1), selecting green oilseed rape pods and measuring the superficial area of the pod skin and weighing the pod skin accurately; (2), scanning the superficial area of the pod skin by a Yaxin-1241 leaf area meter and converting the superficial area into a value I and a value F; then, determining the total content Cabx of photosynthetic pigments of the pod skin, the total content Cab of chlorophylls, the content Ca of chlorophylls a and the content Cb of chlorophylls b; setting C=Ki I or C=Qi F, wherein C refers to pigment content, Ki=C / I and Qi=C / F; determining coefficients Ki and Qi according to the determined value C, value I and value F; (3), scanning the superficial area of the oilseed rape pod skin to be determined by the leaf area meter, converting the superficial area into a value I and a value F, and computing the photosynthetic pigment content Cabx, Cab, Ca and Cb of the pod skin to be determined according to the value I, the value F and the coefficients Ki and Qi. The method has the advantages of accurate and reliable results, more samples, fewer sampling errors, convenience in operation, environmental safety and detection cost saving.