Cultivation of Jasmine
Jasmine is widely cultivated for its flowers, enjoyed in the garden, as house plants, and as cut flowers. The flowers are worn by women in their hair in southern and southeast Asia. Many species also yield an absolute, which is used in the production of perfumes and incense.
Consumption of Jasmine in China
Jasmine tisane is consumed in China, where it is called Jasmine flower tea (茉莉花茶; pinyin: mò lì huā chá). Jasminum sambac flowers are also used to make tea, which often has a base of green tea, but sometimes an Oolong base is used. The delicate Jasmine flower opens only at night during the full moon and is plucked in the morning when the tiny petals are tightly closed. They are then stored in a cool place until night. Between six and eight in the evening, as the temperature cools, the petals begin to open. Flowers and tea are "mated" in machines that control temperature and humidity. It takes four hours or so for the tea to absorb the fragrance and flavour of the Jasmine blossoms, and for the highest grades, this process may be repeated as many as seven times. Because the tea has absorbed moisture from the flowers, it must be refired to prevent spoilage. The spent flowers may or may not be removed from the final product, as the flowers are completely dry and contain no aroma. Giant fans are used to blow away and remove the petals from the denser tea leaves. If present, they simply add visual appeal and are no indication of the quality of the tea.
The Jasmonates (JAs) are a group of plant hormones
which help regulate plant growth and development.
Jasmonates include jasmonic acid and its esters,
such as methyl jasmonate (Methyl Jasmonate). Like
the related prostaglandin hormones found in mammals,
the Jasmonates are cyclopentanone derivatives which
are derived biosynthetically from fatty acids. They
are biosynthesized from linolenic acid by the
The level of Jasmonate in plants varies as a function of tissue and cell type, developmental stage, and in response to several different environmental stimuli. High levels of Jasmonate are also found in flowers and pericarp tissues of developing reproductive structures and in the chloroplasts of illuminated plants; Jasmonate levels also increase rapidly in response to mechanical perturbations such as tendril coiling and when plants suffer wounding.
Demonstrated roles of Jasmonate in planta include:
Jasmonate and Methyl Jasmonate inhibit the germination of nondormant seeds and stimulate the germination of dormant seeds
High levels of Jasmonate encourage the accumulation of storage proteins; genes encoding vegetative storage proteins are Jasmonate responsive and tuberonic acid (a Jasmonate derivative) has been proposed to play a role in the formation of tubers
Jasmonate application can induce chlorosis and inhibition of genes encoding proteins involved in photosynthesis, although the purpose of this response is unknown it is proposed that this response to Jasmonate could help reduce the plant's capacity for carbon assimilation under conditions of excess light or carbon
The role of Jasmonate accumulation in flowers and fruit is unknown; however, it may be related to fruit ripening (via ethylene), fruit carotenoid composition, and expression of genes encoding seed and vegetative storage proteins
Jasmonate plays a role in insect and disease resistance. Many genes during plant defense are induced by Jasmonate; Jasmonate and ethylene may act together in defense response
The perception of jasmonate is via the ubiquitin system, like auxins. After the conjugation of jasmonate and an amino acid isoleucine, it led to the SCFCOI1 complex degrade the ubiquitin markerd JAZ protein, and then releasing the transcription of other transcription factors.