58 results about "Photosynthetic pigment" patented technology

The invention relates to an application of pectase in restraining algal bloom and a method thereof. First water is added to the pectase powder to prepare the pectase solution with the concentration over 200 U / ml and pH value of 4.5 to 6.5 and then the pectase solution is added into an algae solution. The application and the method of the invention can lead blue algae to lose photosynthetic pigment function in a short time, thus controlling the blue algal bloom; the costs for controlling the algal bloom is low and the secondary pollution to the water can also be avoided with safety and reliability. Compared with other microorganism methods, the application and the method of the invention have good controllability and can control the algal bloom in the comparatively short time.

The invention provides a water culture method for relieving the toxic effect of cadmium on tomatoes through salicylic acid and application of salicylic acid. The water culture method includes the following steps that when tomato seedlings are in a two-leaf one-core period, 3 weeks after the tomato seedlings are moved into a water culture box for water culture, a salicylic acid water solution withthe concentration of 20-200 micromole L<-1> is used for foliage spraying, the spraying amount is based on leaf surface water dropping, the salicylic acid solution is sprayed once every day, the salicylic acid water solution is sprayed for three days in total, and then the tomatoes are subjected to 5mg L<-1>Cd(CdSO4) treatment. The accumulation of cadmium in the tomatoes can be reduced, oxidative damage and photosynthesis inhibition of cadmium stress on tomato cells can be relieved, the content of photosynthetic pigments is increased, the photosynthesis performance is improved, and the tomato biomass is remarkably increased.

This disclosure provides a method to reduce cell damage caused by near UV light absorption of algal or cyanobacterial cultures. The algal or cyanobacterial cells are transformed to express one or more fluorescent proteins, that absorb the harmful UV or near UV wavelengths and emits wavelengths that are photosynthetically more active. The photosynthetic pigments of the transgenic algal or cyanobacterial cell culture will then absorb the photosynthetically active light emitted by the fluorescent proteins. Accordingly the harmful effects of the UV and near UV radiation are reduced and the photosynthetic activity of the algal or cyanobacterial cells is improved.

The invention provides a method for evidently lowering the cadmium accumulation of brassica napobrassica and promoting the growth of the brassica napobrassica. The method includes: when brassica napobrassica seedlings grow 3-4 true leaves, using melatonin with the concentration being 50-200 micromol*L<-1> to perform leaf surface spraying until leaf surfaces can drip water. The method has the advantages that cadmium content in the brassica napobrassica can be lowered evidently, the photosynthetic pigment content, antioxidant enzyme activity and biomass of the brassica napobrassica can be increased evidently, and the inhibition effect of cadmium on the growth of the brassica napobrassica can be relieved effectively.

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 discloses a continuous cropping obstacle auto-toxic substance improvement method. The novel continuous cropping obstacle auto-toxic substance improvement method provided by the invention has the following beneficial effects: the application of different organic fertilizers can significantly inhibit the toxic effect of auto-toxic substances on cucumber, improves the photosynthetic pigment content and the photosynthetic rate of the cucumber, and promotes the growth of the cucumber; the reason of the organic fertilizers capable of alleviating the toxic effect of cinnamic acid on the cucumber may be that the micro-ecological environment of rhizosphere is changed; a microecological preparation can promote growth, development and advanced flowering of crops, significantly improves the single-fruit weight , the fruit number per plant and the yield per plant of the crops, realizes the increase of the yield per plant and advanced maturity, and facilitates to the formation of the early-stage yield of the crops; exogenously added cane sugar can alleviate the phenomenon of inhibition on the length of radicle of the cucumber caused by a variety of auto-toxic substances, and protects cells from toxicity of the auto-toxic substances, wherein the detoxification mechanism of the exogenously added cane sugar is to glycosylate the auto-toxic substances through glycosyltransferase; meanwhile, a set of a self-carried irrigation and plant improvement system can provide a good growth environment for the crops.

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 an application of NaHS in relieving stress of CuO NPs on tomato seedlings, and belongs to the technical research field of relieving heavy metal stress of plants. According to the application, NaHS is used as an exogenous donor of hydrogen sulfide, NaHS ionizes HS- in an aqueous solution, hydrolysis of HS- generates hydrogen sulfide H2S, H2S can effectively reduce Cu accumulation in tomato seedlings and increase photosynthetic pigment content in tomato seedling leaves, thereby improving tolerance of tomato seedlings to CuO NPs.

The invention provides a photosynthetic pigment measurement method and a photosynthetic pigment measurement system for soybean leaves. The method comprises the steps of firstly obtaining an image of a soybean leaf; then partitioning the image into a plurality of units with preset specification; forming a unit matrix through the multiple units; acquiring image data of each unit; calculating the photosynthetic pigment content of each unit according to a photosynthetic pigment equation and the corresponding image data; and obtaining a photosynthetic pigment distribution diagram of the soybean leaf according to the photosynthetic pigment content of each unit and the unit matrix. The operations for cutting the leaf and respectively measuring the photosynthetic pigment content of the cut leaf by a chemical method are eliminated, and only the image of the leaf is analyzed, so that the method disclosed by the invention is extremely high in measurement speed; the average time is not longer than 20 seconds, and therefore, the problem that the conventional measurement method is low in measurement efficiency can be solved.

The invention discloses an analysis method for the result of maize and soybean intercropping in Xinjiang region. The temperature and humidity of field between rows of crops, the plant height, the rootsystem, the SPAD value of photosynthetic pigments and the yield variation are analyzed under three cultivation modes, namely, sole cropping of soybean, sole cropping of maize and soybean-maize intercropping. The method has the advantage that the principle of the influence of the intercropping pattern on the crop yield in the drip irrigation region of Xinjiang is explored, and then, the intercropping pattern is applied to the drip irrigation region of Xinjiang to increase the crop yield in the drip irrigation region of Xinjiang.

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 application of methyl jasmonate and exogenous Si<4+> in resisting Cd<2+> stress of tomato seedlings, and belongs to the field of vegetable planting safety. Through combined application of methyl jasmonate and Si<4+>, the accumulation of Cd<2+> in tomato seedlings can be reduced, the photosynthetic pigment content is also increased, and the inhibition of photosynthesis by Cd2+ stress on tomato seedlings is alleviated. In addition, under the combined action of exogenous Si and methyl jasmonate, the growth inhibition of Cd<2+> on tomato seedlings is remarkably relieved inthe process of promoting the growth of tomatoes under the Cd<2+> stress, so that the root length, the plant height, the dry weight and the fresh weight are obviously increased.

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.