On April 16th, 2017, Dora Agri applied 1-Methylcyclopropene on lilies to research the preservation effect on cutting flowers.
The results show: Compared with the control group, the 1-MCP treatment group can effectively delay the appearance of lily respiratory peak, reduce the respiratory rate, delay the imbalance of water metabolism and increase the relative permeability of the cell membrane. (More Details of 1-MCP)
Treatment with 1 000 nL/L 1-MCP is beneficial to the absorption and maintenance of water in cut flowers, and can promote the increase of flower diameter;
150 nL/ L 1-MCP treatment is more effective in inhibiting the respiratory consumption of cut flowers, prolonging the life of the vase and delaying the aging process.
In terms of prolonging the life of lily cut vases, sucrose has a stronger effect than 1-MCP and other preservation measures. In terms of promoting flower diameter and flower opening, 1-MCP has a stronger effect than sucrose and other preservatives.
Problems of Cut Flower Lily Preservation
Lily is one of the most popular rare and precious fresh cut flowers in the world. In recent years, its planting area in my country has been increasing at a rate of 20% per year. The problem of quality degradation is very prominent.
Reducing the loss of circulation, improving the quality of its products, and prolonging the life of the vase are the problems that need to be solved urgently in the research of domestic lily cut flower production.
Studies have shown that lily flowers are ethylene-sensitive end-rising horticultural products and are suitable for 1-MCP treatment.
At present, in the postharvest research of lily, 1-MCP, 6-BA, GA3, sucrose and citric acid are considered to be the most effective non-polluted preservatives in terms of hormone regulation, nutrition and water supplementation, antiseptic preservation and so on.
1-MCP on Cut Flowers Lily
This experiment is to explore the effects of different concentrations of 1-MCP on respiration consumption, cell membrane permeability, water balance, and fresh weight changes during the cutting period of lily cut vases.
1. 1-MCP on Cut Flowers Lily Respiration Rate
The changing trend of the respiration rate during the vase cutting period of the control group and each treatment group was basically the same, both showed a bimodal curve, which belonged to a typical abrupt cut flower.
On the 3rd day of lily bottle insertion, the first respiratory jump peak appeared in the control group and each treatment group. Among them, the respiratory jump peak of the control group was the largest, while the respiratory rate of each 1-MCP treatment group was significantly inhibited, and the maximum breath peak appears delayed.
Among them, the 30 nL/L 1-MCP treatment group reached the maximum respiratory peak on the 7th day, which was 4 d later than the control group, and the 150 and 1000 nL/L 1-MCP treatments both had the highest respiratory jump peak at the same time on the 9th day after harvest, All were delayed by 6 d compared with the control.
Compared with the control group, the maximum respiration peak value of cut lily in each treatment group also decreased to varying degrees. Among them, the 150 nL/L 1-MCP treatment had the most significant decrease, and the respiration rate change was the most stable during the entire bottle insertion period.
2. 1-MCP on Cut Flowers Lily Relative Permeability of Cell Membrane
After lily cut flowers are harvested, the cell membrane permeability tends to increase. The 1-MCP treatment group inhibited the increase rate of cut lily cell membrane permeability to a certain extent.
Especially in the early stage of bottle insertion. The cell membrane permeability of cut flowers in each treatment changed relatively smoothly.
In the late bottle planting stage after the 11th day, the cell membranes of the 1-MCP treatment group and the control group showed a trend of accelerated aging and destruction, which was manifested by a sharp increase in cell membrane permeability.
There was no significant difference in the cell membrane permeability of cut flowers between the groups treated with different concentrations of 1-MCP, but their values were all lower than those of the control group during the same period.
3. 1-MCP on Cut Flowers Lily Water Balance Value
The water balance values of cut lily flowers of different treatment groups all showed a trend of first increasing and then decreasing. Three days before bottle insertion, the water balance value of cut flowers increased due to the water absorption greater than the water loss. Among them, the water balance value of cut flowers in each treatment group of 1-MCP increased more than the control.
After the third day of treatment, with the decrease in water absorption and the increase in water loss of cut flowers, the water balance values of each treatment group and the control group showed a downward trend, but the water balance value of each treatment group of 1-MCP decreased faster than the control group. Delayed.
The water balance value of 30 and 150 nL/L 1-MCP treatment cut flowers dropped to zero at 8.42 and 8.04 d, which was 0.96 and 0.58 d later than the control group respectively;
The 1000 nL/L 1-MCP treatment group had the most significant effect on delaying the decrease in water balance value of cut flowers. The water balance value dropped to zero on the 10.52 day, which was delayed by 3.06 d compared with the control group. . It can be seen that the 1-MCP treatment group promoted the increase in water absorption of flowering branches and the inhibition of water loss.
4. 1-MCP on Cut Flowers Lily Change Rate of Fresh Weight
The change trend of the fresh weight change rate of the flower branches during the vase cutting period of lily cut flowers is similar to the change trend of the water balance value, and it also shows a trend of increasing first and then decreasing.
However, the 1-MCP treatment group was more conducive to the increase and maintenance of the fresh weight of cut flowers than the control group. Among them, the 1000 nL/L 1-MCP group had the best inhibitory effect on the increase of the fresh weight of cut flowers and the decrease of the later fresh weight.
Through this experiment, it can be found that 1-MCP can maintain the fresh weight of cut lily flowers by adjusting its water absorption and maintenance.
Conclusion of 1-MCP on Cut Flowers Lily
This study shows that 1-MCP can effectively reduce the respiration rate of cut lily flowers and delay the emergence of respiratory peaks.
It can reduce its peak value to varying degrees, inhibit the increase of cell membrane permeability during the vase period to a certain extent, delay the decline process of the water balance value of cut flowers and the change rate of fresh weight of flower branches, which is conducive to the absorption and maintenance of water in cut flowers. .
Among them, the 1000 nL/L 1-MCP treatment group had the most significant effect on water absorption of cut flowers and the promotion of flower diameter enlargement, and the 150 nL/L 1-MCP treatment group had the best effect on prolonging the vase life.