What are photo dormant seeds?
What are photo dormant seeds?
What are photo dormant seeds?
b) Photo dormancy: Seeds that either require light or dark condition to germinate are termed as photo-dormant seeds. It is due to photo-chemically reactive pigment called phytochrome widely present in some plants.
What is photo dormant?
Photo dormancy is the state in which the seeds remain in a dormant state in either dark or light condition.
How do you overcome morphological dormancy?
Treatments to Overcome Seed Dormancy
- Mechanical Scarification.
- Hot Water Scarification.
- Drop into hot water (77 to 100oC), remove from heat, allow to cool and soak for 24 hours.
- Acid Scarification.
- Seeds, in small batches, are brought into contact with 93% Technical Grade sulphuric acid.
- Warm Moist Scarification.
What is seed dormancy with example?
Seed dormancy is the state in which seed is unable to germinate, even under ideal growing conditions (Merriam-Webster). Because dormancy can be broken by most ideal growing conditions (different and specific for each species), the seeds germinate when they are the most likely to flourish.
How do you break dormancy of seeds?
Methods of Breaking Seed Dormancy Completion of the over-ripening period. Leaching of inhibitors present in the seed coat. Inactivation of inhibitors by the supply of cold, heat, and light. Leaching of the excess and highly concentrated solutes from the seeds.
What are the disadvantages of seed dormancy?
There are many disadvantages to seed dormancy. Dormancy prevents prompt and uniform emergence of seedlings; interferes with planting schedules; contributes to “volunteering” of crops; and causes problems to the seed analyst.
How is seed dormancy broken?
In seed coat dormancy, the seed coat prevents oxygen and/or water permeating into the seed. Scarification, hot water, dry heat, fire, acid and other chemicals, mulch, and light are the methods used for breaking seed coat dormancy [3].