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A kind of method that improves duckweed total starch yield by promoting dormant body formation

A technology of duckweed and starch, which is applied in the directions of gardening methods, botanical equipment and methods, gardening tools/equipment, etc., can solve the problems of limited effect of dormant body lifting, low total starch yield, and reduced starch yield, etc., so as to improve starch yield. , The effect of increasing starch accumulation speed and reducing power consumption

Active Publication Date: 2020-03-06
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One type of method is to increase the number of thallus by promoting the photosynthesis of the thallus, thereby increasing the number of dormant bodies, including adding sucrose to the water body, cultivating with high light intensity, and under high CO 2 Cultivation under high concentration conditions, although the effect of this method on increasing the number of dormant bodies is more obvious, but the operation is more complicated, time-consuming, production efficiency is low, production cost is high, and it is not economical
Another type of method mainly promotes the formation of dormant bodies through abiotic stress, specifically including nutrient deficiency, low temperature, spraying abscisic acid, etc. These methods have very limited effects on increasing the number of dormant bodies, and will Inhibit the growth of thallus, resulting in a decrease in the starch production of the thallus, so that the total starch production of P.

Method used

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  • A kind of method that improves duckweed total starch yield by promoting dormant body formation
  • A kind of method that improves duckweed total starch yield by promoting dormant body formation
  • A kind of method that improves duckweed total starch yield by promoting dormant body formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Blue light LED lamp + eutrophic condition culture

[0039] Duckweed was inoculated in 1 / 5 Hoagland nutrient solution of 250mL according to 100% coverage, the total nitrogen concentration in 1 / 5 Hoagland nutrient solution was 70mg / L, the total phosphorus concentration was 30mg / L, and a blue LED light was used as the light source. At 25°C, the light quantum flux density is 110μmol / m 2 The light conditions of / s are cultivated in full light, and the evaporated water is supplemented with distilled water every day to the height of the original liquid level, cultivated for 14 days, and the fronds and dormant bodies are harvested respectively.

[0040] Measure and calculate the dry matter accumulation rate and the starch content of the thallus and dormant bodies harvested in the present embodiment under the same experimental conditions as Comparative Example 1, the results show that the dormant body average dry matter accumulation rate is 1.02g / m 2 / d, the starch c...

Embodiment 2

[0041] Example 2: Red LED lamp + eutrophication condition cultivation

[0042] The duckweed was inoculated in 250mL of 1 / 5 Hoagland nutrient solution with 100% coverage, the total nitrogen concentration in the 1 / 5 Hoagland nutrient solution was 70mg / L, the total phosphorus concentration was 30mg / L, and a red LED light was used as the light source. At 25°C, according to the light quantum flux density of 110μmol / m 2 The light conditions of / s are cultivated in full light, and the evaporated water is supplemented with distilled water every day to the height of the original liquid level, cultivated for 14 days, and the fronds and dormant bodies are harvested respectively.

[0043] Measure and calculate the dry matter accumulation rate and the starch content of the thallus and dormant body harvested in the present embodiment under the same experimental conditions as Comparative Example 1, the results show that the average dry matter accumulation rate of the dormant body is 2.01g / m ...

Embodiment 3

[0044] Example 3: R / B: 1 / 2 mixed light LED lamp + eutrophic condition culture

[0045] Duckweed was inoculated in 250mL of 1 / 5 Hoagland nutrient solution with 100% coverage, the total nitrogen concentration in 1 / 5 Hoagland nutrient solution was 70mg / L, and the total phosphorus concentration was 30mg / L. A red-blue mixed light LED lamp with a quantity density ratio of 1:2 is used as a light source, and the light quantum flux density is 110 μmol / m at 25°C 2 The light conditions of / s are cultivated in full light, and the evaporated water is supplemented with distilled water every day to the height of the original liquid level, cultivated for 14 days, and the fronds and dormant bodies are harvested respectively.

[0046] The dry matter accumulation rate and starch content of the thallus and dormant bodies harvested in this embodiment were measured and calculated using the same experimental conditions as Comparative Example 1. The results showed that the average dry matter accumula...

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Abstract

The invention belongs to the field of aquatic energy plant production, and provides a method for increasing the total duckweed starch yield by promoting hypopus formation. The method comprises the steps that duckweed is inoculated in water, cultivation is performed for 14-30 days under the condition of irradiation of red light or blue light or red-blue mixed light, and duckweed hypopus and thallusare harvested. The method can improve the production efficiency while the cost is saved, the total duckweed starch yield is effectively increased, and the method is not limited by water nutrient status and has the general applicability.

Description

technical field [0001] The invention belongs to the field of aquatic energy plant production, and in particular relates to a method for increasing duckweed total starch production by promoting the formation of dormant bodies. Background technique [0002] Duckweed can produce a kind of vegetative propagule, which is obviously different from normal thallus, that is, dormant body (turion). The dormant body and common thallus were differentiated from the same leaf primordia, and the formation of the dormant body meant that the developmental state of duckweed had changed. The most important feature of the dormant body is that the starch content is relatively high, which can generally reach more than 60% (dry weight), while the starch content of the corresponding thallus is usually about 4% to 10%, which can only be the highest even under induction conditions. up to 30%. The size of the starch granules in the dormant body of P. argentina is about 4 μm, which is smaller than tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G31/00A01G7/04
CPCY02P60/14
Inventor 赵海方扬靳艳玲何开泽许亚良李瑾萌杨贵利
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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