17 results about "Photosystem" patented technology

The present disclosure provides a transgenic plant comprising one or more nucleotide sequences encoding polypeptides selected from photosystem II subunit S (PsbS), zeaxanthin epoxidase (ZEP), and violaxanthin de-epoxidase (VDE), operably linked to at least one expression control sequence. Expression vectors for making transgenic plants, and methods for increasing biomass production and / or carbon fixation and / or growth in a plant comprising increasing expression of at least one of PsbS, ZEP and VDE polypeptides are also provided.

An exemplary holographic metasurface lithography system and method that project a hologram having two or more different wavelengths of light onto a hybrid resin to simultaneously or concurrently cure / form both (i) a first material structure, e.g., a metal structure and (ii) a second material structure, e.g., a polymer structure, from the hybrid resin in the same three-dimensional space. The hologram is generated by a metasurface mask that encodes spatial information for both the metal structure and the polymer structure, and the resin has both (i) UV-sensitive metal precursors to form the metal structure and (ii) monomers, crosslinkers, wavelength-selective photosystems to form the polymer structure.

The invention relates to the technical field of photosynthesis power generation, and discloses a device and a method for realizing photosynthesis power generation based on a liquid metal-semiconductor junction. The negative electrode comprises a metal-semiconductor junction (MSJs) consisting of liquid metal and a silicon wafer; the thylakoid suspension is positioned between the positive electrode and the negative electrode and is extracted from spinach. The liquid metal is eGaInSn room temperature liquid metal. The method comprises the following steps: extracting crushed chloroplasts and thylakoid which are rich in photosynthetic devices such as a photosystem I (PSI), a photosystem II (PS) and the like in spinach leaves by using a salt solution separation method; in combination with flexible transparent indium tin oxide (ITO), the photosynthesis power generation device with the structure of Si / LMs / BBY / ITO is manufactured. The liquid metal and the silicon wafer are combined to obtain the MSJs as the negative electrode, the electron transfer efficiency of the power generation device is enhanced, the preparation is simple, the performance is excellent, and green power generation is realized.

This invention discloses a method for enhancing the high-temperature resistance of citrus through exogenous spraying of naringin, belonging to the field of agricultural technology. The method involves preparing naringin into a formulation and spraying it exogenously onto the leaves of citrus plants. Experiments show that after treatment with naringin, phenotypic damage such as wilting and curling of citrus seedling leaves under high-temperature stress is significantly alleviated; the maximum photochemical efficiency of photosystem II (Fv / Fm) is significantly increased; electrolyte leakage rate and malondialdehyde content are significantly reduced; and the accumulation of hydrogen peroxide and superoxide anions is effectively inhibited. This invention utilizes naturally sourced naringin to significantly enhance the tolerance of citrus to high-temperature stress through multiple mechanisms, including maintaining photosynthetic system function, protecting cell membrane integrity, inhibiting membrane lipid peroxidation, and scavenging reactive oxygen species. Furthermore, the method is simple to operate, environmentally friendly, and low-cost, making it suitable for stress-resistant citrus cultivation.

The present application relates to the technical field of submerged vegetation restoration, and particularly relates to a river submerged vegetation restoration fixed-point light supplement system with self-cleaning function; the system comprises a waterproof shell, a spectrum-optimized light source module, a secondary optical lens module, an automatic cleaning arm module and an intelligent control core module; wherein: the waterproof shell is used for providing outdoor waterproof protection; the spectrum-optimized light source module is used for outputting an optimized spectrum suitable for photosynthesis of submerged plants; the secondary optical lens module is installed on the spectrum-optimized light source module and is used for adjusting the light angle and light range; the automatic cleaning arm module is used for regularly removing algae and scale on the surface of the waterproof shell to maintain the light transmittance; and the intelligent control core module is used for unified regulation and control of the light source, cleaning action and remote interaction; in the above manner, the effects of spectrum optimization, light adjustment and automatic cleaning are achieved, the photosynthesis and growth of submerged plants are promoted, and the river ecological restoration process is accelerated.

By engineering genetic traits associated with photosynthesis in plants, transgenic plants with increased crop yield can be generated, which will ultimately lead to increased food production in the field. To obtain beneficial genetic traits for enhanced photosynthesis, accelerated evolution is applied under salt stress in a cyanobacteria species, Synechococcus elongatus PCC 7942, by conditionally suppressing its mismatch repair system. Through high-throughput screening for biomass accumulation and sucrose production, it is discovered that specific amino acid changes in the pre-Dl protein of Photosystem II (PSII), encoded by the psbA genes, can improve efficiency of photosynthesis under salt stress, as well as pathogen resistance. Next, the same amino acid changes were made in Arabadopsis and proved that photosynthetic efficiency (measured via growth rate) is also increased in this model vascular plant.

This invention discloses a photosynthetic nanomotor powered by a biomolecular motor and its preparation method, belonging to the field of colloidal motors. This invention aims to address the current limitations of research on the rotational dynamics of FoF1-ATP synthase molecular machines, which is limited to the motion of single and isolated objects. The photosynthetic nanomotor is prepared based on supramolecular self-assembly technology through the reconstruction of thylakoid vesicles and lecithin vesicles. The photophosphorylation system on the thylakoid membrane surface is reconstructed on the photosynthetic nanomotor. Utilizing the preserved biomolecular motor FoF1-ATPase as the power engine, under external visible light irradiation, protons generated by the photosystem accumulate in the photosynthetic liposome motor, driving the FoF1-ATPase to synthesize the energy currency ATP. Through metabolic reactions, light energy is converted into chemical energy ATP, ultimately generating self-propulsion. Due to its unique energy currency regeneration capability, the photosynthetic liposome motor has broad application prospects in the biomedical field.

The invention provides an amaranthus retroflexus ArUGT75L6 gene, the nucleotide sequence of the amaranthus retroflexus ArUGT75L6 gene is as shown in SEQ ID NO: 1, and the coded amino acid sequence of the amaranthus retroflexus ArUGT75L6 gene is as shown in SEQ ID NO: 2. The invention also provides application of the gene. The amaranthus retroflexus ArUGT75L6 gene is used for metabolic detoxification light system II (PS) II inhibitor herbicides in plants. The relationship between the amaranthus retroflexus ArUGT75L6 gene and the photosystem II inhibitor herbicide resistance is disclosed for the first time, whether amaranthus retroflexus generates metabolic resistance to herbicides or not can be identified by detecting the expression quantity of the amaranthus retroflexus ArUGT75L6 gene, and the method has guiding significance on timely discovery of resistance, guidance of scientific pesticide application in farmland and alleviation of further spreading of pesticide resistance. The method has an important application prospect in detection and research of non-target resistance of amaranthus retroflexus to PS II inhibitor herbicides.

The invention relates to the technical field of bitter gourd high-temperature-resistant material screening, and particularly discloses a bitter gourd high-temperature-resistant material screening method which comprises the following steps: 1, establishing a multi-stage dynamic high-temperature stress system, and simulating natural high-temperature fluctuation and a subtropical day and night temperature difference environment in two stages of a bitter gourd seedling stage and a flowering stage to obtain a multi-stage dynamic high-temperature stress system; the defect that traditional constant-temperature stress cannot reflect the real heat resistance of the field is overcome; step 2, establishing an evaluation system for high-temperature-resistant screening of bitter gourds from field morphological damage (heat damage index and leaf withering rate), photosynthetic response (photosystem efficiency and net photosynthetic rate) in plants and oxidative stress (MDA content and SOD / CAT activity). According to the screening method of the bitter gourd high-temperature-resistant material, linkage molecular markers are developed on the basis of the precisely identified heat-resistant gene, early-stage rapid screening of the bitter gourd high-temperature-resistant material is achieved, the breeding efficiency is remarkably improved, and the breeding period is shortened.

This invention relates to the field of plant stress diagnosis technology, and more particularly to a modulated fluorescence imager that uses blue and green light to calculate the photochemical efficiency Φ of leaf photosystem I. PSI The method described in this invention utilizes a Mini-PAM chlorophyll fluorometer to measure blue and green light excitation in tomato leaves of both the test and control groups to generate fluorescence. Based on the measurement results, the photochemical efficiency Φ of photosystem I is calculated. PSI This allows for the diagnosis of the condition of the crop under test. The photochemical efficiency Φ of the photosystem I mentioned in this invention... PSI It is more sensitive to stress and is more effective in reflecting adverse stress. It is expected to be applied to the early diagnosis of stress in plants, so as to intervene in time and reduce losses.

Provided herein, in some embodiments, are engineered cells and use of the same for increased hydrogen production. In particular, provided herein are genetically engineered cells comprising a polynucleotide encoding a fusion protein comprising a photosystem I (PSI) protein and an algal hydrogenase, as well as methods for producing such genetically engineered cells. Also provided herein are methods for increasing hydrogen (H2) production in cells.

A genetically modified phototrophic cell for in-vivo production of hydrogen. The phototrophic cell has been genetically modified to the effect that a) at least one of the native photosystem I components has been deleted, b) the native hydrogenase has been deleted, and c) at least one fusion protein is expressed, comprising i. a hydrogenase or hydrogenase component and ii. at least one PSI component, with the proviso that the PSI is complemented by expression of the at least one fusion protein, and the hydrogenase component itself, or together with at least one further hydrogenase component expressibly introduced into the cell, has hydrogenase activity.

The application discloses a kind of estimation methods of rice leaf function phenotype, comprising the following steps: first, based on the situation simulation of canopy radiation transfer model, the coupling relationship of the opening proportion q L With photosynthetically active radiation I is obtained;Second, based on the close mechanism of leaf chlorophyll fluorescence SIF and electron transport rate J, combined with the above coupling relationship, accurate estimation of rice leaf J is realized based on SIF observation;Finally, based on the principle of evolution optimality, combined with the mechanism of J and maximum carboxylation rate V cmax , the accurate estimation of rice leaf V cmax Is realized.Based on the coupling relationship of q L And I, relying on the mechanism of SIF and electron transport rate and maximum carboxylation rate, the accurate estimation of rice leaf function phenotype J and V cmax Is realized, and a new rice function phenotype estimation method is constructed.

The present invention relates to a mixture comprising dichloroclomazone and at least one herbicide selected from the group consisting of photosystem I electron diverting agents and agriculturally acceptable salts and esters thereof. The invention also relates to an agrochemical composition of the mixture and to a method of using the mixture or composition.

The present application relates to a kind of multi-environment regulation in situ real-time photosynthetic phenotyping system applied to the field of agricultural plant photosynthetic phenotyping, including environmental control system, photoelectric control system, image acquisition system, plant light system, computer, touch screen and plant sample cultivated in detection box, it is box type multi-environment regulation in situ real-time photosynthetic phenotyping system, realize the automatic regulation of experimental environmental factors, and in the experiment process, realize the in situ real-time monitoring and imaging of plant chlorophyll fluorescence parameters in box, improve the accuracy of chlorophyll fluorescence parameter detection, improve the efficiency of research work, and cooperate with adjusting band to realize the parallel of the detection angle of fluorescence imaging CCD camera and the leaf to be detected, guarantee the consistency of detection distance, cooperate with flattening unit, realize the flattening processing of warping part, guarantee the accuracy of detection result.

This invention belongs to the field of cultivation technology of Panax notoginseng, a precious Chinese medicinal herb. It relates to a method for preparing and applying a carbon quantum dot nanoemulsion. The method involves mixing an emulsifier and water, then adding an oil phase containing carbon quantum dots, and stirring until homogeneous to obtain a carbon quantum dot nanoemulsion. After diluting the nanoemulsion with water, it can be sprayed onto Panax notoginseng leaves. The results show that the nanoemulsion promotes the accumulation of photosynthetic pigments and enhances the activity of the photosynthetic system in Panax notoginseng leaves, thereby increasing the photosynthesis and photosynthetic product accumulation of Panax notoginseng leaves, and ultimately promoting the accumulation of Panax notoginseng biomass and saponins.

The invention relates to the technical field of intelligent spectrum regulation and control, and provides a system for promoting algae growth through a lighting system, and the system comprises a data storage module which is used for querying the basic information and association relation of each nutritional ingredient of spirulina on preset cooperative capability; the data analysis module is used for constructing a synergistic metabolic chain among the nutritional ingredients based on the basic information and the association relationship, and determining a balance condition of the synergistic metabolic chain; the spectrum customization module is used for distributing a spectrum band and a power proportion corresponding to the spectrum band for the collaborative metabolic chain on the premise of simultaneously meeting the incidence relation and the balance condition; the control module is used for controlling the starting, stopping, light intensity output and spectrum stability maintenance of the light source promotion module; and the light source promoting module is used for emitting a corresponding composite spectrum according to the spectrum band and the power proportion distributed by the spectrum customization module so as to promote the growth of the spirulina. The method can synergistically guarantee fast growth speed and high nutritional value of algae.