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Regulation and control method for improving heat resistance of dahlia

A technology of dahlia and heat resistance, applied in the field of ornamental gardening, can solve problems affecting ornamental value and economic value, and achieve the effects of improving growth and development, enhancing heat resistance, and promoting growth and development

Inactive Publication Date: 2017-02-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for ornamental plants, once high temperature inhibits plant flowering, it will seriously affect its ornamental value and economic value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The rooted tissue-cultured seedlings of the dahlia variety 'Single Petal Yellow' were transplanted to potted plants, and were cultivated and managed conventionally. When the plant grows to the vegetative growth stage above 15-20 cm in height, spray 0.1-1.5 mmol·L -1 It is advisable to spray the upper and lower surfaces of the leaves evenly; spray once a day in the morning and evening for 2 consecutive days, and then give the environmental conditions of high temperature stress (day 35°C / night 30°C). Results In the case of artificially set high temperature stress, spraying 0.5-1.0 mmol·L -1 The growth and development of dahlia plants treated with salicylic acid were relatively normal, and the leaf color was dark green. Compared with the control group not sprayed with salicylic acid, the relative content of chlorophyll increased by 18.2% to 25.0%, and the net photosynthetic intensity increased by 29.7% to 57.21%. %. At the same time, the physiological and biochemical in...

Embodiment 2

[0026] The rooted tissue-cultured seedlings of the dahlia variety 'Single Petal Yellow' were transplanted to potted plants, and were cultivated and managed conventionally. Spray 0.1-1.5 mmol·L -1 For salicylic acid, it is advisable to spray the upper and lower surfaces of the leaves evenly; spray once a day in the morning and evening, spray continuously for 2 days, and then put it in an environment of natural high temperature in summer (day 34-37°C / night 30-32°C) Potted under conditions. Results Under high temperature stress, spraying 0.5-1.0 mmol·L -1 The dahlia plants with salicylic acid showed normal growth and development, and most of the plants with excellent growth reached more than 90%. Compared with the control group without salicylic acid, the leaves of the plants were dark green, and the relative content of chlorophyll increased by 19.8% ~33.3%; the flowering volume per plant increased by 1.0-1.5 times, the flower diameter increased by 21.5%-35.8%, and the full ...

Embodiment 3

[0029] Dahlia axillary buds were used as explants, and inoculated in medium MS+0.1 mg·L by conventional disinfection methods -1 6-BA+0.5mg·L -1 NAA+1.0mg·L -1 GA 3 Above, in vitro culture to obtain test-tube plantlets. The concentration in 1 / 2 MS medium is 0.01~1.0 mmol·L -1 salicylic acid, cut dahlia test-tube plantlets about 1.5-2.5 cm in length and subcultured for 10-15 days, then transferred to a plant with a light time of 12 h / d, a light intensity of 3500-4000 lx, and a daytime temperature of 35°C / night at 30°C. Under high temperature stress treatment. The result was added 0.02~0.05 mmol·L -1 Cultured on the medium of salicylic acid, dahlia test-tube plantlets grew well, and induced more root systems, which increased by 15.4% to 97.7% respectively compared with the control; and, under high temperature stress, the content of malondialdehyde in the leaves of dahlia test-tube plantlets decreased, and proline With the increase of soluble protein content, the activity...

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Abstract

The invention discloses a regulation and control method for improving heat resistance of dahlia. The method includes: preparing a salicylic acid solution with the concentration of 0.1-1.5 mmol / L, spraying leaves with the salicylic acid solution in 1-2 days before high temperature stress during a growth period or a flowering period of the dahlia, continuously spraying the leaves for 2 days, and spraying the leaves once in the morning and evening every day respectively; and spraying the leaves once every 6-8 days during continuous high temperature stress. After the dahlia is sprayed with the salicylic acid solution, dahlia plants grow and develop in a relative normal state, and most of the dahlia plants grow well in a high temperature stress environment; leaves of the dahlia plants are dark green, and the chlorophyll relative content and the net photosynthetic rate are increased; the number of flowers of a single plant is increased, the flower diameter is increased, and the full-bloom period is prolonged; resistant physical signs such as autioxidant enzyme activities, malondialdehyde, proline and soluble proteins of the leaves of the dahlia change correspondingly, and then tolerance of the dahlia in the high temperature environment can be effectively improved, which has positive effects on introduction, open field cultivation and landscape application of the dahlia.

Description

technical field [0001] The invention relates to a cultivation technology related to the stress resistance of flowers, in particular to a control method for improving the heat resistance of dahlias, and belongs to the technical field of ornamental horticulture. Background technique [0002] Dahlia ( Dahlia pinnata Cav.) is a perennial bulbous flower of the genus Dahlia in the family Asteraceae. It has beautiful flower posture, bright colors, various varieties, and long flowering period. The plant heights of different varieties vary greatly. It is suitable for potted plants and open land beautification. It is often used to arrange flower beds in garden landscape configuration It is also suitable for potted plants and garden planting. It is an excellent material for improving urban ecological environment, beautifying city appearance and family. Varieties with beautiful flower shapes can also be used for cut flower production, which can be used as decorations such as bouquets,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01G7/06A01H4/00
CPCA01G7/06A01H4/008A01G22/00
Inventor 谈建中赵川乐管华张萍萍李坚孔周阳祁伟
Owner SUZHOU UNIV
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