Environmental Regulation of Weed Seed Dormancy and Germination

Many weeds produce dormant seeds that are unable to complete germination under favourable conditions. There two types of seed dormancy: primary dormancy (innate dormancy), in which a state upon release from the parent plant, and secondary (induced develops through some experience after plant. Mechanisms categorized as embryo coat-imposed dormancy. In dormancy, control resides within itself, it is maintained by structures enclosing embryo. factors can influence during development dispersal; they be abiotic, biotic, or combination both. Most deposit large number bank, one types—transient persistent. transient type, all viable soil germinate die year, there no carry-over until new crop deposited. persistent at least survive for more than year always Some require after-ripening—changes dry cause improve germination. Nondormant, if encounter appropriate face climate change, including global warming, proportion nondormant seeds, shortly dispersal, smaller, bank. Further studies required explore this phenomenon.