34 results about "Photoinhibition" patented technology

The invention belongs to the field of microalgae biotechnology, and in particular relates to a method for alleviating the photoinhibition of Haematococcus pluvialis. When the culture of Haematococcus pluvialis cells reaches the plateau stage, when the light is transferred to strong light for light induction, small molecule organic matter glycerol or sodium acetate is added to the culture system, thereby reducing the photoinhibition of algal cells and promoting the production of astaxanthin during the culture process. accumulation. The present invention enhances the ability of Haematococcus pluvialls to resist strong light by adding small molecular organic matter (glycerol or sodium acetate) one or more times during the transition of the cultivation stage, and fully overcomes the strong light resistance of Haematococcus pluvialls. The occurrence of photoinhibition leads to a decrease in cell density, which in turn increases the production efficiency of astaxanthin in Haematococcus pluvialis.

The invention discloses antioxidation-related genes TaSRX-A, TaSRX-B and TaSRX-D of wheat as well as coding proteins and application thereof. The invention also discloses the application of the genes and the coding proteins thereof in regulating the antioxidation function of plants or protecting a photosynthetic system from photoinhibition and photoxidation function. The genes have the advantagesof being capable of clearing away active oxygen in a light stress condition, protecting the photosynthetic system, enhancing the capabilities of resisting photoinhibition and photoxidation of the plants and further increasing the biomass of the plants. The genes and the coding proteins thereof disclosed by the invention have an important theoretical significance and a practical significance for researching light stress resisting mechanisms of common wheat and increasing the output of the common wheat and other important crops and have wide application prospects.

The present invention relates to a new method for avoiding photoinhibition to improve astaxanthin production during microalgae cultivation. The cultivation of microalgae to produce astaxanthin usually adopts a two-stage method. The first stage realizes the mass reproduction of cells and the accumulation of biomass through heterotrophic, autotrophic or polytrophic methods, and the second stage adopts light stress supplemented by nutrient stress and other methods. Accumulation of intracellular astaxanthin is achieved. However, from the first stage to the second stage, the phenomenon of photoinhibition often occurs, which seriously affects the yield of astaxanthin. Therefore, the present invention regulates the cell state by controlling the culture conditions in the transformation process, such as: controlling the composition of the medium, shading, transition to low light, increasing the initial seeding density, gradually diluting, adjusting the outdoor seeding time, etc. Therefore, it fully overcomes the problem of photoinhibition of microalgae under strong light, which can greatly improve the efficiency of microalgae production of astaxanthin, and realize low-cost, high-efficiency and large-scale cultivation of microalgae to produce astaxanthin.

The invention belongs to the field of gene engineering, and discloses a soybean photosynthesis related gene GmDeg2 and an application thereof. The soybean photosynthesis related gene GmDeg2 has a nucleotide sequence as shown in SEQ ID NO. 1; protein coded by the gene has an amino acid sequence shown in SEQ ID NO.2. By using any vector which can guiding expression of exogenous genes in a plant, the GmDeg2 gene of the invention can be introduced into a plant cell so as to obtain a transgenic plant with improved photoinhibition resistance. The gene of the invention has important significance on soybean photoinhibition resistance, especially on cultivation of soybean varieties with high photosynthetic efficiency.

The invention provides a high-sensitivity coronagraph stray light detection device, which relates to the field of observation and detection of astronomical targets. The optical filter is arranged between the coronagraph to be tested and the single-photon counting detector, and the single-photon counting detector is arranged on the focal plane of the coronagraph to be tested; The simulated sunlight enters the coronagraph to be tested, the band-pass filter performs wavelength selection for the band to be tested, and the single photon counting imaging detector detects the stray light brightness and solar surface brightness of the coronagraph to be tested. The invention can realize the detection of the coronagraph stray light suppression ability by separately measuring the solar surface radiation and the coronagraph stray light radiation, and overcomes the inability to use solar radiation directly to coronagraph stray light suppression in low altitude areas due to the influence of atmospheric scattering. Difficulties in the detection of photoinhibition capacity.

The invention provides a non-toxic biological anti-fouling resistance reducing composite coating, which sequentially comprises a priming paint coating, a luminous powder coating and a protective coating. The protective coating is positioned on a surface layer, the priming paint coating is positioned on a bottom layer, the luminous powder coating is positioned between the protective coating and the priming paint coating, and the surface of the non-toxic biological anti-fouling resistance reducing composite coating is provided with a micron-sized pit structure. The invention further provides a preparation method for the composite coating and an anti-fouling resistance reducing treatment method for the surface of a base material. According to the non-toxic biological anti-fouling resistance reducing composite coating prepared by the preparation method, as luminous powder is capable of illuminating environments, attachment of marine organisms is reduced by means of the photoinhibition effect. On one hand, the luminous powder is non-toxic and radiation-free, and negative effects on the environments are decreased. On the other hand, as the surface of the composite coating is provided with the micron-sized pit structure, the flow field of a near wall can be changed, resistance reduction is realized and coupled with an anti-fouling method, and anti-fouling and resistance reducing functions are realized.