54 results about "Light stress" patented technology

The invention relates to a lodging and senility resisting, high photosynthetic efficiency and yield increasing regulator for corn, and a preparation method and an application thereof. The regulator contains 5-aminolevulinic acid, 2-(3,4-dichlorophenoxy)triethylamine and ethephon, and preferably contains an activator and a spreader, and the activator and the spreader are selected from one or more of tween20 and tween60. The regulator can substantially enhance the low temperature cold injury, high temperature, drought and low light stress resistance of corn, increases the effective spike number, the number of grains per spike and the thousand-grain weight of the corn, and increases the output of the corn by 20% or above. The regulator has the characteristics of low cost, use convenience and less field residual, is easy to promote and apply, and has an active promotion effect on Chinese corn production.

The invention discloses a method for judging and selecting dim light tolerance. The method includes steps of A, sowing, regularly sowing crop seeds in the growth environment manually controlled; B, identifying microsporogenesic stage, to be specifically, starting dim light stress treatment when AD value of more than a half crop stems ranges from -2 cm to +2 cm after a flag leaf elongating stage; C, performing dim light stress treatment, to be specifically, reducing the light intensity to 0-10% of that in sunny days, keeping for 3-5 d; D, counting spike kernels of the stems, to be specifically, counting in a middle grouting state; E, judging dim light tolerance of the crops. The method for judging and selecting dim light tolerance has a great significance for the crops in facing with the adverse environment of haze, rainy and sparse sunlight weather, global dimming and the like.

The invention discloses a photoelasticity principle based flexile microprobe and an application method thereof. The photoelasticity principle based flexile microprobe, namely an integral structure made of SU-8 photoresist, comprises a microprobe stress end and a microprobe base body. The microprobe base body comprises a base body end and a base body tail. The base body end and the microprobe stress end are arranged on the same side of the base body tail to form a microprobe structure. The light intensity variation of polarized light transmitting a flexible hinge stress measurement area and a measurement light path is measured, a relationship between the light intensity variation and stress magnitude of the microprobe stress end is established, and accordingly, measurement of micro force can be achieved. The photoelasticity principle based flexile microprobe made of the SU-8 photoresist is low in processing technique cost and high in stability and has the advantages of chemical corrosion resistance, good mechanical property and biocompatibility, high light stress coefficient and the like; moreover, the photoelasticity principle based flexile microprobe of the integral structure is free from assembly, simple to produce and beneficial for functionalization of microoperation techniques in the fields of biomedicine, material chemistry and the like.

It is the object of an arrangement and a method for the recording and reproduction of images of an object to be examined to record the images of the object to be examined with reduced light stress and lower expenditure on adjustments and to generate secondary images which are substantially independent from brightness, are highly suitable for spectrometric studies of metabolism and microcirculation at the eye as well as for functional imaging, and can be adapted to the medical inquiry and make it possible to provide complex secondary image information while also enabling simple, practicable and extremely economical constructional variants. An illumination system contains at least one beam path with a device for simultaneous illumination of the object to be examined by at least one reference wavelength region and at least one information wavelength region, each of which is adapted, respectively, to a color channel of an image-generating recording system. While the at least one reference wavelength region is at least approximately invariant with respect to medically relevant information, the at least one information wavelength region is provided for detecting the medically relevant information. The method according to the invention combines the image values of evaluation windows or individual image points of simultaneously recorded images to form secondary images and image sequences while generating spatially-resolved dynamic characteristic values which are combined to form functional images.

A display device includes a display panel including a plurality of pixels, a data driver configured to generate a data voltage provided to the pixels, a light stress compensator configured to determine whether a pixel of the pixels satisfies a light stress condition based on an input image data, and to output a data voltage control signal that changes a voltage level of the data voltage provided to the pixel that satisfies the light stress condition, a scan driver configured to generate a scan signal provided to the pixels, and a timing controller configured to generate a control signal that controls the data driver and the scan driver.

The invention relates to a new method for avoiding microalgae photoinhibition and improving astaxanthin yield in the culture process of microalgae. In general, a two-stage method is adopted to cultivate the microalgae to produce astaxanthin, wherein on the first stage, massive reproduction of cells and accumulation of biomass are achieved in a heterotrophic, autotrophic or mixotrophic culture mode, and on the second stage, accumulation of the astaxanthin in the cells are achieved in methods, such as light stress assisted with nutrition stress. However, when the microalgae is transformed from the firsts stage to the second stage, phenomenons, such as light stress usually occur, and accordingly the astaxanthin yield is seriously influenced. Therefore, multiple methods are adopted to control culture conditions in a transformation process, such as medium components controlling, sunshading, weak light transition, initial inoculated density improving, gradual dilution and outdoor inoculated time adjusting so that cell conditions can be adjusted and the cells can improve the ability to resist a strong light; therefore, thelight stress problem of the microalgae under the strong light is solved completely, the efficiency of the microalgae for producing the astaxanthin is improved greatly, and low cost, high efficiency and large-scale cultivation of the microalgae for producing the astaxanthin are achieved.

The invention discloses a screening method of shade tolerant corn inbred lines. The method includes planting to-be-screened corn materials in March-August, the planting density being 67500 plants / hm<2>; adopting a two-factor split plot design, lines being a main plot and light being a subplot; arranging two treatments which are low-light stress with 90% of shading rates and normal lighting, threetimes of repetition, and single line areas, the line length being 4 m and linewidth being 0.8 m; adopting single seed seedling raising, 2-leaf 1-heart stage transplanting, and single plant planting; performing limit shading by using a sunshade net with 90% of the shading rates at 5-6 leaf stage for 3 months; investigating the incidence of stem rot during the yellow ripening period; performing datastatistics and analysis by applying DPS statistics software; and screening the shade tolerant corn inbred lines according to incidence of plants. The method is more direct to screen the shade tolerant corn materials according to the occurrence of the stem rot; the method is simple in recording and small in error; and the method is simple, fast and accurate.

A method for improving quality of water spinach is used during soilless culture growth of the water spinach. The method comprises the steps that an organic carbon fertilizer is taken as a leaf fertilizer of the water spinach for a spraying treatment in a rainy season after culture of the water spinach. The organic carbon fertilizer is an organic carbon transparent solution obtained by processing of kitchen rubbish, wherein the content of organic carbon is 25-50 mg / L. Urea with the proportion of 0.1% is also contained in the organic carbon fertilizer. During the spraying, the organic carbon fertilizer shall be sprayed uniformly from top to bottom on the leaf surface of a water spinach plant; the spraying shall be carried out for one time every two to four days; and the spraying shall be carried out for four to five times in total. According to the method provided by the invention, the leaf surface spraying of the organic carbon fertilizer is performed on the soilless-cultured water spinach, so that the water spinach can be nourished during the growth; the problem about harms brought to the water spinach under a dim light stress situation can be relieved; the problem about the poor quality of the water-cultured water spinach under the dim light stress situation can be effectively solved; yield and taste of the water spinach can be improved; and adaptability and stress tolerance of the water spinach in the stress situation can also be enhanced.

The invention discloses cellulose aerogel microspheres with light stress hydrophilic-hydrophobic conversion response functions, and a preparation method thereof. According to the method, cellulose aerogel is made from degreased cotton, the cellulose aerogel microspheres are obtained through reverse phase suspension and ambient pressure drying, titanium dioxide is loaded onto the surfaces of the cellulose aerogel microspheres through bridging of tannic acid, and accordingly, the cellulose aerogel microspheres with the special light stress hydrophilic-hydrophobic conversion response functions are prepared. The technological process for preparation is simple, and the equipment requirements are low; production raw materials are cheap, solvents are easy to recover, the cost is low, and the yield is high; the preparation process does not require a tedious solvent replacement process in conventional normal pressure drying of aerogel, and large-scale industrial production is facilitated. The prepared microspheres are spherical particles, the average grain diameter can be controlled in the range of 1-2000 micrometers, and the microspheres have the light stress hydrophilic-hydrophobic conversion response functions and can be applied to the fields such as oil-water separation, heat insulation, chromatographic separation, catalysis, biological drug loading and blood purification.

The invention provides a method and a system for evaluating influence of low-illumination stress on the quality of greenhouse tomatoes. The method comprises the following steps: collecting air temperature and photosynthetically active radiation information in a sunlight greenhouse under preset conditions; calculating a heat effect, a radiation effect, a temperature-light effect and an accumulated temperature-light effect of the sunlight greenhouse tomatoes in the flowering and fruit period in each day by combining the upper limit temperature and the lower limit temperature required by the growth and development of the sunlight greenhouse tomatoes in the flowering and fruit period; and calculating a difference value between the CK and the accumulated temperature-light effect between the different low-illumination treatment, calculating a difference value between the CK and the tomato nutritional quality index between the different low-illumination treatment, establishing a dynamic relationship between the accumulated temperature-light effect difference value and the nutritional quality index difference value, and simulating the dynamic influence of the low-illumination stress on the tomato nutritional quality index. According to the method, the advantages of the heat radiation product algorithm are used for reference, the photosynthetic active radiation in the original heat radiation product index is replaced by the light effect by using the temperature-light effect algorithm, the evaluation effect is improved, and the influence of the light stress on the tomato nutritional quality index can be evaluated more accurately.

The invention provides a method for relieving weak light stress of water spinach. The illumination intensity of a growing environment of the water spinach is monitored in the fast growing period of the water spinach, and weak light stress is relieved by spraying organic carbon fertilizer when the average illumination intensity is smaller than 7500 Lux. The method for relieving weak light stress of the water spinach comprises the step of organic carbon fertilizer spraying, wherein illumination intensity determination is performed in the fast growing period of the water spinach, the organic carbon fertilizer is sprayed to the water spinach which is subjected to weak light stress, and each liter of the liquid fertilizer contains 90-110 g of nitrogen, 0 g of phosphorus pentoxide, 50-70 g of potassium oxide and 80 g or above of amino acid. According to the method, operation is easy and convenient, the performance is sensitive, whether the water spinach is subjected to weak light stress or not can be accurately monitored and judged, then fast and efficient relieving measures can be taken, and the problems of yield decreasing and quality reducing of the water spinach under weak light stress can be effectively solved.

The invention discloses a stress preservation apparatus for broccoli and an application method thereof. The stress preservation apparatus comprises a frame, a low-temperature stress part and a light stress part, wherein a sub-low-temperature cabin is composed of a heat-preserving cabin body, a cabin door, an equal-temperature air-supplying pore plate and cold storage plates; a multi-light-source light supplementing system is composed of a multi-light-source LED lamp group, a sensor group and a telescopic rod capable of automatically adjusting distance; temperature control in the sub-low-temperature cabin is realized in such a way that cold air generated by a refrigerating unit passes through a cold air machine and is then diffused into the sub-low-temperature cabin via the equal-temperature air-supplying pore plate so as to promote cooling and cold storage of the sub-low-temperature cabin and the cold storage plates, and a temperature sensor in the bottom sensor group senses temperature changes and feeds back the temperature changes to a PLC control system; moreover, a top-mounted intelligent fan can automatically adjust gas composition in the cabin and discharge gas with peculiar smell. The stress preservation apparatus for broccoli provided by the invention provides proper low temperature, illumination and gas concentration needed in storage of broccoli and achieves the purposes of inhibiting yellowing of the broccoli, prolonging the shelf life of the broccoli and maintaining the quality of the broccoli.

The invention discloses a Nicotiana alata gene NaD1 promoter and use thereof. The promoter has a nucleotide sequence shown in SEQ ID NO: 1. The invention further provides a vector containing the promoter and a host cell. The invention further relates to a nucleic acid constructor containing the promoter, a vector, a recombinant cell, a transgenic plant, an explant and a callus. The invention further discloses the use of the promoter. The Nicotiana alata gene NaD1 promoter and the use thereof have the advantages that the promoter contains a photoresponse element, the expression of the gene NaD1in flowers can be significantly changed under light stress treatment, and researching on regulation and control modes of the promoter has important use in more efficient utilization of protein NaD1.

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 invention relates to the application of a gene spkD for regulating growth rate of Synechocystis. Application of the gene spkD regulating the growth rate of Synechocystis in increasing the growth rate of Synechocystis and / or restoring the growth rate after light stress; The nucleotide sequence of the gene spkD is shown in SEQ ID NO. 1. The invention discloses for the first time the important role of spkD gene of Microcystis aeruginosa PCC7806 in improving the growth rate of Synechocystis. The average specific growth rate of the transgenic Synechocystis sp. Increased by 13.97% compared withthe wild type in 6 days under normal culture conditions, However, both mutants overexpressing spkD gene and wild type exhibited overcompensatory growth performance in the light recovery stage (6 daysculture stage) after light limitation stress, and the specific growth rate of mutants increased by 7.13% compared with wild type in the overcompensatory growth stage.

The invention relates to an application of chitosan oligosaccharide and composition thereof in resisting intense light stress for crops, and particularly provides a farm chemical composition for crops to resist intense light. The farm chemical composition comprises the chitosan oligosaccharide, and the weight percentage of the chitosan oligosaccharide in farm chemical composition is 0.01 to 0.02 percent or 0.005 to 0.015 percent. The chitosan oligosaccharide composition is applied before crops suffer from the stress of intense light or after the crops suffer from the stress of the intense light, so not only can the crops be prevented from being damaged by the intense light, but also the damage of the intense light on the crops can be reduced.

The present invention provides a method for increasing the levels of 3′-phosphoadenosine-5′-phosphate (PAP) or a derivative or analogue thereof in cells of said plant compared to an untreated or wild-type plant grown under the same stress conditions. The methods may comprise administration to the plant and / or the soil it is growing in of: PAP or a derivative or analogue thereof, a substance that enhances or promotes synthesis or accumulation of PAP or said derivative or analogue thereof; or a substance that inhibits or compromises an activity metabolising or removing PAP or said derivative or analogue thereof. Alternatively, the methods may comprise genetic modification of cells of said plant which modifications allow for increased accumulation of PAP or a derivative or analogue thereof in cells of said plant (or in seeds thereof) at least under stress conditions compared to a wild-type plant. The methods find particular application in increasing the tolerance of plants to abiotic stress conditions, which may be selected from increased salinity, increased sodium levels, drought, light stress and pH stress. The present invention also provides a method for extending the dormancy of a seed, as compared to an untreated seed, said method comprising accumulating in cells within said seed an increased level of PAP or a derivative or analogue thereof compared to an untreated or wild-type seed.

The invention relates to a compound regulator for plant growth and a use method thereof in rice shade-enduring planting and belongs to the technical field of plant growth regulation. The compound regulator comprises the following raw materials in parts by weight: 0.25-0.30 part of a triazole plant growth regulator, 0.0090-0.01 part of gibberellin and 0.5-3 parts of an acidic phosphate and potash fertilizer. The use method of the compound regulator for plant growth in rice shade-enduring planting comprises the step of mixing the compound regulator for plant growth with 800-1200 parts of water.According to the invention, the combination of gibberellin, the triazole plant growth regulator and the acidic phosphate and potash fertilizer is capable of effectively relieving weak light stress ofrice plants and boosting normal growth of rice.

The invention relates to a wheat high-photosynthetic-efficiency anti-adversity production-increasing regulator and a preparation method and application thereof. The regulator per liter comprises 5-20 g of 5-aminolevulinic acid, 7-10 g of naphthylacetic acid salt, 5-10 g of spreader and the balance water. The spreader is one or more of polysorbate 20 and polysorbate 60. The regulator can obviously enhance the capability of wheat for resisting low temperature, chilling damage, high temperature and low light stress, the number of productive ear, kernels per spike and thousand seed weight of wheat are increased, and the wheat yield is improved by more than 10%. Meanwhile, the wheat high-photosynthetic-efficiency anti-adversity production-increasing regulator has the advantages of being low in cost, convenient to use, small in field residual and the like, is easy to apply and popularize and has the positive promoting effect on wheat production in China.

The invention provides a method for improving cucumber seedling and strong seedling production in a plant factory by using low-dosage UVB. A conventional LED light source is adopted in the plant factory seedling cultivation process and mainly comprises red and blue light wave bands, and according to the method, low-dosage UVB radiation is added on the basis of a low-light-intensity full-spectrum Sunlike LED light source. Through low-dose UVB radiation, the stress symptom of the cucumber seedlings is not caused, but the cucumber seedlings are promoted to show the growth characteristics of sunny plants in a weak light environment, specifically, the plant type is more compact, the leaf net photosynthetic capacity and the water utilization efficiency are higher, and the capacity of coping with high-intensity dynamic light stress is higher; according to the method disclosed by the invention, the production quality of cucumber seedlings and strong seedlings in a plant factory can be greatly improved by adding a low dosage of UVB radiation.

The invention discloses a method and an application for improving weak light resistance of nightshade crops, and belongs to the technical field of vegetable cultivation. The method is characterized in that the crops are treated by a GABA (gammer amino butyric acid) solution under a weak light condition. The method has the advantages that by using the GABA as a growth regulating agent, the adaptability of the crops to weak light stress is improved, the weak light resistance ability of the crops is improved, the photosynthetic efficiency of the crops is improved, and the adverse effect of adversity stress to the crops is relieved; the manual light supplementing operation is safely and efficiently replaced, the important meaning is realized for the actual production, and a theoretical basis and reference are provided for breeding of high-quality weak light-resistant pepper variety.

The invention relates to the field of crop protection and in particular relates to a compound preparation for relieving low temperature and weak light stresses on crops and an application thereof. The compound preparation for relieving low temperature and weak light stresses on crops is mainly prepared from the following components in parts by weight: 0.020-0.028 part of proline, 0.3-0.8 part of sodium hydrogen sulfite, 1.2-1.8 parts of monopotassium phosphate, 0.05-0.10 part of triacontanol, 1-3 parts of calcium nitrate and 5*10<-5>-5*10<-4> parts of brassinolide. The compound preparation provided by the invention has the beneficial effects that all the components are plant hormones and nutrient elements essential to crop growth, are low in costs and are pollution-free; and as all the components have low temperature and weak light resistant synergistic effects, not only are the chlorophyll contents and photosynthesis of overground leaves of the crops under the conditions of low temperature and weak light increased but also growth and development of crop roots and the physiological functions are promoted and cold damages caused by cold current and long-time snow and ice weather can be prevented.

The invention relates to a preparation method and application of carbon quantum dot / chitosan derivative hydrogel with light-stress dual response. The preparation method comprises the following steps of: well mixing o-phenylenediamine and urea in water, and heating to obtain a carbon quantum dot solution; dropwise adding a sodium hydroxide solution into a chitosan quaternary ammonium salt aqueous solution, continuously stirring until the pH value is 10, heating to 70 DEG C, adding epichlorohydrin as a cross-linking agent for reaction, and adding glycerol to obtain a cross-linked chitosan quaternary ammonium salt mixed solution; and adding the carbon quantum dot solution into the cross-linked chitosan quaternary ammonium salt mixed solution to form a cross-linked chitosan quaternary ammonium salt / carbon quantum dot mixed solution, and heating for gel forming to obtain the carbon quantum dot / chitosan derivative hydrogel. Carbon quantum dots with excellent mechanical properties, good electrical conductivity and excellent optical properties are used as a photoelectric filler, and a carbon quantum dot network and a cross-linked chitosan quaternary ammonium salt gel network are subjected to synergistic response through a stirring effect to construct the light-stress dual-response polymer hydrogel.

The invention provides a method for relieving weak light stress of water spinach. The illumination intensity of a growing environment of the water spinach is monitored in the fast growing period of the water spinach, and weak light stress is relieved by spraying organic carbon fertilizer when the average illumination intensity is smaller than 7500 Lux. The method for relieving weak light stress of the water spinach comprises the step of organic carbon fertilizer spraying, wherein illumination intensity determination is performed in the fast growing period of the water spinach, the organic carbon fertilizer is sprayed to the water spinach which is subjected to weak light stress, and each liter of the liquid fertilizer contains 90-110 g of nitrogen, 0 g of phosphorus pentoxide, 50-70 g of potassium oxide and 80 g or above of amino acid. According to the method, operation is easy and convenient, the performance is sensitive, whether the water spinach is subjected to weak light stress or not can be accurately monitored and judged, then fast and efficient relieving measures can be taken, and the problems of yield decreasing and quality reducing of the water spinach under weak light stress can be effectively solved.

The POL panel auxiliary detection system comprises a control case and a detection host, the control case is installed on the outer wall of the right end of the detection host, and a frame plate falling protection device is arranged on the outer wall of the center of the left end of the uppermost side of the detection host. A novel frame plate falling protection device is additionally arranged on one side of the polarized light stress meter for the POL panel auxiliary detection system, and the novel frame plate falling protection device can play a role in buffering and supporting a lifting type detection frame plate when the lifting type detection frame plate loses locking force of a locking bolt and falls down; the buffer protection springs are stressed to be compressed and buffer and counteract impact force generated by downward falling of the lifting type detection frame plate, and after the buffer protection springs are compressed to a certain degree, falling of the lifting type detection frame plate can be stopped and stopped; therefore, the lifting type detection frame plate can be prevented from continuously falling down and directly colliding with the detection host, so that the lifting type detection frame plate and the detection host are prevented from being damaged.

The invention relates to the field of crop protection and in particular relates to a compound preparation for relieving low temperature and weak light stresses on crops and an application thereof. The compound preparation for relieving low temperature and weak light stresses on crops is mainly prepared from the following components in parts by weight: 0.020-0.028 part of proline, 0.3-0.8 part of sodium hydrogen sulfite, 1.2-1.8 parts of monopotassium phosphate, 0.05-0.10 part of triacontanol, 1-3 parts of calcium nitrate and 5*10<-5>-5*10<-4> parts of brassinolide. The compound preparation provided by the invention has the beneficial effects that all the components are plant hormones and nutrient elements essential to crop growth, are low in costs and are pollution-free; and as all the components have low temperature and weak light resistant synergistic effects, not only are the chlorophyll contents and photosynthesis of overground leaves of the crops under the conditions of low temperature and weak light increased but also growth and development of crop roots and the physiological functions are promoted and cold damages caused by cold current and long-time snow and ice weather can be prevented.