Tulip is a perennial bulbous flower of the genus Tulip in the Liliaceae family. Its flower stems are upright, its flowers are like lotus, its petals are thick, its colors are various, its colors are rich and bright, and its leaves are elegant. It is a world-famous bulbous flower. There are many varieties of tulips, and they are widely used in gardens. Tall varieties are suitable for cut flowers or flower borders, and can also be planted on the edge of the lawn; medium and short varieties are particularly suitable for potted plants, used to embellish the courtyard and indoors, adding a festive atmosphere.
The main application of plant growth regulators on tulips:
- Breaking bulb dormancy and promoting development
Soaking tulip bulbs in a mixed solution of 100mg/L Ethephon+100mg/L gibberellic acid ga3+100mg/L Kinetin for 24 hours can break dormancy. In addition, fumigating bulbs with 0.5μL/L Ethylene for 3 days can promote bulb development.
- Tissue culture
Tissue culture of tulip can use scales as explants, callus and bulb induction medium is MS+2.0mg/L 6-Benzylaminopurine (6-ba)+2.5mg/L NAA, and seedling medium is MS+1.5mg/L GA3.
In addition, the shoot tip can be used as an explant, the bud induction medium is MS+2.0mg/L 6-ba+0.1mg/L NAA, the proliferation medium is MS+0.4mg/L 6-ba+0.2mg/L NAA, and the root induction medium is 1/2 MS+0.4mg/L Kinetin+0.1~1.0mg/L NAA.
Furthermore, stem segments can also be used as explants, and the bud induction medium is MS+1.0mg/L 6-ba +0.2mg/L NAA, the proliferation medium is MS+0.4mg/L 6-ba+0.2mg/L IAA, and the rooting induction medium is 1/2 MS +0.4mg/L Kinetin +0.1~1.0mg NAA.
- Promote the growth of flower stalks and improve the quality of cut flowers
During the budding period of tulips, spraying plants with 50mg/L GA3 can significantly increase the length of flower stalks and the size of flower buds, and significantly improve the quality of cut flowers.
In addition, spraying 50~100mg/L GA3 or a mixed solution of 50mg/L, GA3+50mg/L, IBA during the tulip extraction period can also promote the elongation of flower stalks, increase the diameter of flowers, and significantly improve the quality of cut flowers.
Furthermore, when the tulip seedlings are 5cm tall, drip 400mg/L GA3 solution into the sheath leaves, 0.8mL per plant each time, 1 week apart, 3 times in total, which can increase the length of the flower stems and make the flowers more vivid.
- Reduce the height of potted plants and improve ornamental value
Pot-cut tulips often reduce their ornamental quality due to excessively high flower stems. To control the height, the tulip bulbs can be immersed in 30mg/L ene-effect solution for about 40 minutes before potting. After 1 month, the plants are about 40% shorter than those without treatment, and the ornamental value is improved.
In addition, after the potted tulips are shaded, when the leaves grow to 6~8cm, each pot with a diameter of 15cm is irrigated with 5mg of paclobutrazol, which can make the leaves dark green and thick, and the pedicels short and strong, improving the ornamental value. Moreover, spraying 175mg/L paclobutrazol on the leaves when the plant height is about 5cm can also effectively control the height of the tulip plants.
- Promote flowering
Soaking tulip bulbs in 100~150mg/L GA3 solution for 24h can replace low-temperature pre-cooling treatment, so that tulips can bloom in winter greenhouses in advance, and the diameter of the flowers will also increase.
In addition, when the tulip plant height is 5~10cm, drip 1mL of 300~400mg/L GA3 aqueous solution per plant, or drip a mixture of 200mg/L GA3+5~10mg/L 6-ba, can make it bloom earlier.
- Cut flower preservation
Insert the base of cut tulips cut when the buds first bloom into a 4mmol/L silver thiosulfate solution (immerse the flower branches about 2cm) for pretreatment for 20 minutes, and then insert them into a vase solution containing 3% sucrose + 200mg/L 8-hydroxyquinoline citrate + 150mg/L citric acid + 15mg/L 6-BA or 3% sucrose + 200mg/L 8-hydroxyquinoline citrate + 150mg citric acid + 10mg/L Paclobutrazol, etc., which can extend the vase life by more than 1 times.
In addition, tulips can be directly inserted into a vase solution containing 3% sucrose + 150mg/citric acid + 300mg/L 8-hydroxyquinoline citrate + 5mgL Uniconazole or 5% sucrose + 300mg/L 8-hydroxyquinoline citrate + 50mg/L Chlormequat Chloride, etc.