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Method for improving drought or/and cold stress resistance of loquat seedlings

A technology for seedlings and loquats, applied in the field of improving the ability of loquat seedlings to resist drought and/or cold stress, and can solve the problems of high input costs

Active Publication Date: 2020-11-27
SOUTHWEST UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the survival rate of loquat seedlings can be improved by cultivating in these facilities, the input cost is extremely high

Method used

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  • Method for improving drought or/and cold stress resistance of loquat seedlings
  • Method for improving drought or/and cold stress resistance of loquat seedlings
  • Method for improving drought or/and cold stress resistance of loquat seedlings

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Effect test

Embodiment

[0031] The method that the external application of melatonin provided by the invention improves the ability of loquat seedlings to resist drought and cold stress includes:

[0032] (1) externally applying melatonin to carry out root watering treatment to loquat seedlings;

[0033] (2) The seedlings treated with melatonin were placed under drought conditions and subjected to drought stress treatment.

[0034] (3) The seedlings treated with melatonin were placed under cold conditions and subjected to cold stress treatment.

[0035] (4) Screen out the melatonin treatment concentration corresponding to the loquat seedlings with the strongest resistance.

[0036] (5) Determination of stress-resistance-related photosynthetic indicators, physiological indicators and cell structure observation of seedlings during the stress process.

[0037] In the root watering treatment of loquat seedlings with external application of melatonin: the selected loquat seedlings are "Huabai No. 1" gra...

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Abstract

The invention provides a method for improving drought or / and cold stress resistance of loquat seedlings. A melatonin solution with a specific concentration is adopted for irrigation treatment before the loquat seedlings are subjected to drought or / and cold stress resistance, and a result shows that melatonin treatment obviously improves endogenous melatonin content and fluorescence parameters in loquat seedling leaves. The content of SOD, POD, CAT and APX in the loquat seedling leaves is remarkably increased, meanwhile, the content of MDA is reduced, and the integrity of leaf tissue structuresis maintained. According to a research discovery, the melatonin solution with the specific concentration can not only improve the drought stress resistance of the loquat seedlings, but also the coldstress resistance of the loquat seedlings can be improved. Planting process is low in investment cost and high in seedling survival rate, so that the promotion speed and efficiency of new varieties are increased, the survival rate of offspring in the crossbreeding process is increased, the process and efficiency of breeding new varieties are accelerated, and the method has important strategic significance for sustainable development of the loquat industry in China.

Description

technical field [0001] The invention belongs to the field of biotechnology, and relates to superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase ( APX) and other biological enzymes, specifically relate to a method for improving loquat seedling resistance to drought or / and cold stress. Background technique [0002] Loquat (Eriobotryajaponica Lindl.) is a plant of Rosaceae and Loquat genus. It is a perennial woody evergreen small tree, up to 10 meters high; the branchlets are thick, yellowish brown, and densely rusty or grayish brown. Loquat originated in my country and has been cultivated for thousands of years. Its fruit matures in the off-season of late spring and early summer, and is an important economic fruit tree in my country. At present, the self-selected varieties of loquat in my country have a high market share and have extremely high market potential. [0003] Loquats are mostly planted on hillsides with weak water retention capacity...

Claims

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Application Information

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IPC IPC(8): A01G7/06
CPCA01G7/06
Inventor 景丹龙梁国鲁王丹汪卉郭启高何桥党江波王淑明吴頔
Owner SOUTHWEST UNIVERSITY
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