Method capable of remarkably improving stress resistance of eggplants under low-temperature and weak-light conditions

Abstract

The invention relates to a method capable of remarkably improving stress resistance of eggplants under low-temperature and weak-light conditions. The method comprises the following steps: (1) plump eggplant seeds are selected, disinfected with Na3PO4 solution and soaked for germination acceleration, and sowing is performed after the seeds sprout; (2) after three true leaves grow out from each eggplant seedling, a 50-250 mu mol.L<1> melatonin solution is adopted to spray the leaves and applied once every 2-3 days, 3-5 mL of the melatonin solution is sprayed to each eggplant seedling and the melatonin solution is sprayed 3-4 times totally. With the adoption of the method, damage of low temperature and weak light to the eggplants can be relieved, the photosynthesis is improved, the activity of in-vivo antioxidase including POD (peroxidase), CAT (catalase) and SOD (superoxide dismutase) in the eggplants is improved, the content of MDA (methane dicarboxylic aldehyde) is reduced, metabolism balance of intracellular reactive oxygen species is maintained, damage to cell membranes is avoided, accumulation of proline and soluble sugar is accelerated, the eggplants can maintain relatively high solar energy capturing efficiency under the weak-light condition, and the resistance of the eggplant seedlings to low temperature and weak light is improved.

Description

technical field [0001] The invention belongs to a method for enhancing stress resistance of plants, in particular to a method for significantly enhancing stress resistance of eggplant under low temperature and weak light stress. Background technique [0002] my country is a large agricultural production country, with a wide range of crops, high yields and high demand. However, due to the low temperature in late autumn and early spring, it often causes serious damage to plants and vegetables. Studies have shown that when plants are subjected to environmental temperatures lower than those required for their growth and development, it will cause delayed growth and damage to the physiological functions of reproductive organs, and as time goes on, eventually lead to weak growth of seedlings, wilting and yellowing, partial Necrosis, low fruit setting rate, reduced yield and reduced quality. [0003] Light energy is an important energy source for plant growth and development. Plan...

AI Technical Summary

Problems solved by technology

However, eggplant is a temperature-loving vegetable. The optimum temperature for plant growth is 28-32°C during the day and 18-25°C at night. Temperatures lower than 15°C will easily lead to slow growth and development, resulting in a decrease in the thickness of the eggplant stem, resulting in a decline in yield and quality. Metabolism disorders will occur below 10°C, and will freeze to death at 0°C. Low temperature is the main factor affecting the yield and quality of eggplant

With the increase in the annual supply of eggplants, the growth and development of eggplants are seriously affected by unfavorable factors such as low temperature and low light in winter and spring protected cultivation, which not only easily leads to excessive growth of crops, decreased photosynthetic capacity, and weakened resistance to diseases and insect pests, but also affects the growth and development of eggplants. The flowering, fruit setting and fruit development of eggplant will eventually lead to the decline of eggplant yield and quality

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