Jasmonate is a lipid-based plant hormone that regulates growth, photosynthesis, and reproduction. It was first isolated from jasmine oil and leads to the expression of genes involved in wound response, producing defense molecules in tomatoes. Jasmonate also plays a role in leaf senescence and cell death by interacting with kinases and transcription factors related to senescence and inducing reactive oxygen species that damage mitochondria membranes. One of jasmonate's earliest observed effects was inhibiting root growth, though the mechanism is still unknown. Jasmonate can both inhibit the germination of nondormant seeds and stimulate the germination of dormant seeds.

1. Jasmonate Plant Growth

2. Jasmonate
• Jasmonate (JA) and its derivatives are lipid-based
hormone signals .
• Regulate growth, photosynthesis and reproductive
development.
• The isolation of methyl jasmonate from jasmine oil
derived from jasminum grandiflorum led to the
discovery of the molecular structure of jasmonates
and their name.

3. Jasmonic acid

4. Methyl jasmonate

7. Function
• Jasmonate (JA) regulates many different processes
in the plant.
• Its role in wound response is JA biosynthesis is
rapidly activated, leading to expression of the
appropriate response genes.
• For example, in the tomato, wounding produces
defense molecules that inhibit leaf digestion in the
insect's gut.

8. • JAs have also been implicated in cell death and leaf
senescence.
• JA can interact with many kinases and transcription
factors associated with senescence.
• JA can also induce mitochondrial death by inducing
the accumulation of reactive oxygen species (ROSs).
• These compounds disrupt mitochondria membranes
and compromise the cell by causing apoptosis.

9. • One of the earliest discoveries made that JA inhibits
root growth. The mechanism behind this event is still
not understood.
• JA and MeJA inhibit the germination of nondormant
seeds and stimulate the germination of dormant
seeds.