CN115067101B - New application of strigolactone in improving potassium deficiency stress resistance of plants - Google Patents
New application of strigolactone in improving potassium deficiency stress resistance of plants Download PDFInfo
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- CN115067101B CN115067101B CN202210836162.3A CN202210836162A CN115067101B CN 115067101 B CN115067101 B CN 115067101B CN 202210836162 A CN202210836162 A CN 202210836162A CN 115067101 B CN115067101 B CN 115067101B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/06—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings
- A01N43/12—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings condensed with a carbocyclic ring
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P21/00—Plant growth regulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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Abstract
The invention discloses a new application of strigolactone in improving the capability of plants in resisting potassium deficiency stress, and relates to the technical field of plant hormones. According to the invention, research on potassium deficiency stress of the pear seedlings shows that exogenous application of strigolactone can improve the oxidation resistance of plants by improving SOD and CAT activities, so that the resistance of the plants to the potassium deficiency stress is obviously improved.
Description
Technical Field
The invention relates to the technical field of plant hormones, in particular to a novel application of strigolactone in improving the capability of plants in resisting potassium deficiency stress.
Background
The lack of potassium can inhibit the growth of plant root systems, so that the root-to-crown ratio is reduced; while blocking the synthesis and transport of photosynthetic products to the phloem, resulting in reduced biomass. Long-term potassium deficiency of plants can occur with growth inhibition and yellowing, and is first manifested in the old leaves. Under the condition of insufficient external potassium content, the growth and development of plants are obviously hindered.
In order to relieve the potassium deficiency phenomenon of plants, methods such as cultivation of good varieties, genetic engineering, soil improvement and the like are mainly adopted at present, however, the methods have long period, great difficulty, even potential safety problems and the like, and the current contradiction is not solved rapidly.
The plant hormone can regulate the growth and development of plants and the stress resistance reaction. The existing research shows that the novel plant hormone Strigolactone (SL) can obviously improve the dry weight of the underground part and the overground part of the rape seedling subjected to waterlogging stress, and increase the total surface area and the total root length of plant roots; under exogenous SL treatment, leaf wilting and yellowing of wheat seedlings in drought stress are improved, and the leaves are more stretched. SL can also relieve leaf wilting of millet, grape and other plants under drought stress. However, the role of SL in potassium deficiency stress has not been reported.
Disclosure of Invention
The invention aims to provide a novel application of strigolactone in improving the potassium deficiency stress resistance of plants, so as to solve the problems in the prior art, and further effectively improve the potassium deficiency stress resistance of plants by applying strigolactone.
In order to achieve the above object, the present invention provides the following solutions:
one of the technical proposal is as follows: the invention provides an application of strigolactone in improving the capability of plants in resisting potassium deficiency stress.
Further, the acting concentration of strigolactone is 0.1mg/L.
Further, the strigolactone is applied by spraying and irrigating.
Further, the plant is a pear.
The second technical scheme is as follows: the invention provides a product for improving the capability of plants to resist potassium deficiency stress, which contains strigolactone active ingredients.
And the third technical scheme is as follows: the invention provides a method for improving the potassium deficiency stress resistance of plants, which comprises the following steps: the strigolactone is applied to the plant.
Further, the administration concentration of strigolactone is 0.1mg/L.
Further, the application mode is spraying and irrigating.
Further, the plant is a pear.
The invention discloses the following technical effects:
the invention provides a new application of strigolactone in improving the capability of plants to resist potassium deficiency stress, and the capability of plants to resist potassium deficiency stress can be obviously improved by exogenously applying strigolactone.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
Example 1
Strigolactone (SL) is prepared into 0.1mg/L solution for standby.
And (3) transferring the tissue culture seedlings of the pyrus ussuriensis into a rooting culture medium for culture, and transferring the tissue culture seedlings into a nutrient soil basin with the length, width and height of 7cm multiplied by 10cm of a climatic chamber after rooting. The indoor relative humidity is kept above 70%, and the temperature is controlled between 16 ℃ and 20 ℃. When the tissue culture seedling grows to four leaves and one center, the tissue culture seedling is irrigated with Hoagland nutrient solution every 3 days, and then the tissue culture seedling is irrigated with Hoagland nutrient solution23 ℃ +/-2 ℃ and illumination intensity of 800 mu mol.m -2 ·s -1 Is cultured under the condition of (2). After one week, seedlings with similar growth conditions were selected for subsequent potassium deficiency and exogenous SL treatment.
21 domesticated pear seedlings with consistent growth vigor are selected from each group, one group of control, two groups of potassium-deficient treatment, three groups of potassium-deficient treatment and strigolactone application are carried out, and 3 groups are arranged in total.
Preparing Hoagland nutrient solution and potassium deficiency nutrient solution for standby.
Hoagland nutrient solution is divided into solution A, solution B and ferric salt, and 1ml, 1ml and 0.4ml of each liter of distilled water are added.
Hoagland nutrient solution A: KNO (KNO) 3 50.55g/L、MgSO 4 60.21g/L、Mg(NO 3 ) 2 ·6H 2 O 76.52g/L、KH 2 PO 4 68.045g/L、HBO 3 1.155g/L、MnCL 2 ·4H 2 O 0.684g/L、ZnSO 4 ·7H 2 O 0.84g/L、(NH 4 ) 6 Mo 7 O 24 ·4H 2 O 0.486g/L、CuSO 4 ·5H 2 O 0.0306g/L；
Hoagland nutrient solution B: ca (NO) 3 ) 2 ·4H 2 O 259.765g/L、CaCl 2 55.49g/L；
Hoagland nutrient solution ferric salt: EDTA-FENA73.4g/L;
the potassium-deficiency nutrient solution is divided into solution A, solution B and ferric salt, and 1ml, 1ml and 0.4ml of each liter of distilled water are added respectively.
Potassium deficiency nutrient solution A: replacing K element in Hoagland nutrient solution with Na element, and NaNO 3 42.503g/L、NaH 2 PO 4 59.985g/L, and the rest components are the same as Hoagland nutrient solution A;
potassium deficiency nutrient solution B: the liquid B is the same as Hoagland nutrient solution B;
potassium deficiency nutrient solution ferric salt: ferric salt is added in Hoagland nutrient solution;
and respectively transferring the selected pear seedlings to a water planting box, irrigating one group of Hoagland nutrient solution, two groups of potassium-deficient nutrient solution, and three groups of potassium-deficient nutrient solution containing 0.1mg/L strigolactone solution and spraying 0.1mg/L strigolactone solution. Irrigation frequency was 1 time for 3 days, totaling 5 times; the spraying frequency was 1 day and 1 time, 15 times in total.
The activities of plant height, fresh weight, dry weight, chlorophyll content, photosynthetic rate, malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) of each group of plants before (0 d), during (8 d) and after (15 d) treatment were measured and statistically analyzed, and the test was repeated three more times.
Experimental results:
after 15 days of potassium deficiency treatment, the seedlings of the pyrus ussuriensis which are not applied with SL have weak growth vigor and show obvious symptoms of potassium deficiency stress caused by leaf margin scorch; and the capability of resisting potassium deficiency stress of the pear seedlings with SL is enhanced, and the symptom of potassium deficiency stress is obviously reduced. The fresh weight, dry weight, plant height, chlorophyll content, photosynthetic rate of the plants increased significantly after SL application, with fresh weight and dry weight increasing from 2.08g and 0.81g to 2.77g and 0.96g, respectively; the plant height is increased from 6.13cm to 8.03cm, and is increased by 1.9cm; compared with potassium-deficiency treatment, the chlorophyll content is increased by 3.7SPAD; the photosynthetic rate is increased by 105%. This means that the exogenous Shi Jiadu foot-gold lactone can obviously improve the growth condition of the pear seedlings under the stress of potassium deficiency.
Malondialdehyde is an index for measuring the oxidative damage degree of plants, and the content of malondialdehyde is high, namely the oxidative damage of plants is serious. The content of malondialdehyde is measured, and after 15 days of potassium deficiency stress treatment, the content of endogenous malondialdehyde in the seedlings of the group of the potassium deficiency treatment is obviously increased from about 10.2nmol/g FW to about 18.4nmol/g FW, and the content of malondialdehyde is 12.7nmol/g FW after exogenous SL treatment, which is much lower than that of the seedlings of the group of the non-potassium deficiency treatment, so that the content of endogenous malondialdehyde under the stress of potassium deficiency can be effectively reduced by exogenous Shi Jiadu foot gold lactone.
The seedlings of the pyrus ussuriensis under the stress of potassium deficiency are treated by strigolactone for 15 days, and the seedlings are found that: under the potassium deficiency treatment, the degree of oxidative damage of the plants with the strigolactone is obviously lower than that of the plants without strigolactone, which shows that the exogenous application of strigolactone effectively relieves the potassium deficiency stress. By measuring SOD, POD, CAT activity, the activities of the three antioxidase after 15d of potassium deficiency treatment are obviously reduced, the activities of SOD and CAT after external source SL application are 171.7Unit/g FW and 2412.2Unit/g FW respectively, and compared with 86.0Unit/g FW and 1335.4Unit/g FW after potassium deficiency treatment, the activities of the three antioxidase after 15d of potassium deficiency treatment are obviously improved by 99.7 percent and 81.0 percent, and the activities of PODs are not obviously different. This suggests that exogenous SL can increase antioxidant capacity of pear seedlings by increasing SOD and CAT activity.
Example 2 field test:
the birch-leaf pear seeds soaked for 24 hours with deionized water are sown in nutrient soil and vermiculite 1:1 in a well-mixed basin, culturing in a culture room (temperature 25 ℃ C., light intensity 6 Klux), transferring to vermiculite for culturing after two weeks, culturing for one week by using 1/2Hoagland nutrient solution, and culturing for one week by using Hoagland nutrient solution.
Each group is selected from 50 seedlings of fructus Pyri with consistent growth vigor, one group is controlled, two groups is treated with potassium deficiency, three groups is treated with potassium deficiency and strigolactone is applied, and 3 groups are arranged in total.
Hoagland nutrient solution and potassium-deficient nutrient solution (the formula is the same as in example 1) are prepared, one group of the Hoagland nutrient solution is irrigated, the other group of the potassium-deficient nutrient solution is irrigated, and the other group of the potassium-deficient nutrient solution containing 0.1mg/L strigolactone solution is irrigated and sprayed. The irrigation frequency is 1 time a week, and the total is 9 times; the spraying frequency was 1 time for 3 days, and 20 times in total.
The activities of plant height, fresh weight, dry weight, chlorophyll content, photosynthetic rate, malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) were measured and statistically analyzed for each group of plants before (0 d) and after (60 d), respectively, and the test was repeated three more times.
Experimental results:
after 60 days of potassium deficiency treatment, the seedlings of the pyrus ussuriensis which do not apply SL have weak growth vigor and show obvious symptoms of potassium deficiency stress of leaf margin scorch; and the potassium deficiency stress resistance of the seedling of the pyrus pyrifolia with the SL is enhanced, and the symptoms of the potassium deficiency stress are obviously reduced. After 60d of potassium deficiency stress, the plant height of the seedling of the pyrus pyrifolia was reduced from 9.87cm to 6.4cm, whereas after 0.1mg/L SL was exogenously applied, the plant height of the pyrus pyrifolia was significantly increased to 8.8cm. The fresh weight of the seedling of the fructus Pyri is also obviously reduced after potassium deficiency stress, and the fresh weight of the seedling of the fructus Pyri is obviously increased by 10.46% after exogenous application of SL; there was no significant difference in dry weight compared to the control. After exogenous application of SL, chlorophyll content increased significantly from 36.43SPAD after potassium deficiency treatment to 40.57SPAD, and its photosynthetic rate increased significantly by 0.41 fold. This means that the exogenous Shi Jiadu foot-gold lactone can obviously improve the growth condition of the seedling of the pyrus pyrifolia under the stress of potassium deficiency.
Malondialdehyde is an index for measuring the oxidative damage degree of plants, and the content of malondialdehyde is high, namely the oxidative damage of plants is serious. The content of malondialdehyde is measured, and found that after 60 days of potassium deficiency stress treatment, the content of endogenous malondialdehyde in the seedlings of the group of the pyrus pyrifolia is obviously increased from about 11.03nmol/g FW to about 30.71nmol/g FW, and is increased by about 178 percent, and after exogenous SL treatment, the content of malondialdehyde is 18.35nmol/g FW, and is reduced by 40.2 percent compared with that of the pyrus pyrifolia without SL, which indicates that exogenous Shi Jiadu foot aurolactone can effectively reduce the content of endogenous malondialdehyde in the pyrus pyrifolia under the stress of potassium deficiency.
The seedlings of the birch-leaf pear under the stress of potassium deficiency are treated by strigolactone for 60 days, and the seedlings are found that: under the potassium deficiency treatment, the degree of oxidative damage of the plants with the strigolactone is obviously lower than that of the plants without strigolactone, which shows that the exogenous application of strigolactone effectively relieves the potassium deficiency stress. By measuring SOD, POD, CAT activity, it was found that the SOD and CAT activities of the seedlings of Dunaliella tertiolecta seedlings after 60d of potassium deficiency treatment were significantly reduced from 167.43Unit/g FW and 1117.64Unit/g FW to 98.20Unit/g FW and 851.39Unit/g FW, respectively, whereas their activities were significantly increased to 156.32Unit/g FW and 996.22Unit/g FW, respectively, after exogenous application of SL. POD activity was not significantly different after exogenous application of SL compared to potassium-deficient treated real seedlings. These results indicate that exogenous SL can increase antioxidant capacity of seedlings of pyrus pyrifolia by increasing SOD and CAT activity.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (4)
1. The application of strigolactone in improving the potassium deficiency stress resistance of the pyrus ussuriensis maxim is characterized in that strigolactone is taken as a single active ingredient; the acting concentration of strigolactone is 0.1mg/L.
2. The use according to claim 1, wherein the strigolactone is applied by spraying and watering.
3. A method for improving the potassium deficiency stress resistance of a pyrus ussuriensis maxim, which is characterized in that a single active ingredient strigolactone is applied to plants; the application concentration of strigolactone is 0.1mg/L.
4. The method for improving the resistance of the pyrus ussuriensis to the potassium deficiency stress according to claim 3, wherein the application mode is spraying and irrigating.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498782A (en) * | 2011-10-14 | 2012-06-20 | 合肥工业大学 | Method for improving utilization rate of potassium of plants |
| CN110663385A (en) * | 2019-10-23 | 2020-01-10 | 青岛农业大学 | Novel application of novel compound in improving potassium ion stress resistance of Malus hupehensis Rehd |
| CN110692639A (en) * | 2019-10-23 | 2020-01-17 | 青岛农业大学 | Novel application of ester concentrated complexing agent in improving saline-alkali stress resistance of apples |
| CN111802393A (en) * | 2020-07-30 | 2020-10-23 | 青岛农业大学 | Novel compound for improving soil aluminum toxicity resistance of plants and preparation method thereof |
| CN111887253A (en) * | 2020-07-30 | 2020-11-06 | 青岛农业大学 | Application method of novel compound in improving resistance of plants to soil acid stress |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498782A (en) * | 2011-10-14 | 2012-06-20 | 合肥工业大学 | Method for improving utilization rate of potassium of plants |
| CN110663385A (en) * | 2019-10-23 | 2020-01-10 | 青岛农业大学 | Novel application of novel compound in improving potassium ion stress resistance of Malus hupehensis Rehd |
| CN110692639A (en) * | 2019-10-23 | 2020-01-17 | 青岛农业大学 | Novel application of ester concentrated complexing agent in improving saline-alkali stress resistance of apples |
| CN111802393A (en) * | 2020-07-30 | 2020-10-23 | 青岛农业大学 | Novel compound for improving soil aluminum toxicity resistance of plants and preparation method thereof |
| CN111887253A (en) * | 2020-07-30 | 2020-11-06 | 青岛农业大学 | Application method of novel compound in improving resistance of plants to soil acid stress |
Non-Patent Citations (1)
| Title |
|---|
| Nitrogen and phosphorus fertilization negatively affects strigolactone production and exudation in sorghum;Kaori Yoneyama等;Planta(第238期);第885-894页 * |
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