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Over time, seeds lose viability, which is the ability to initiate metabolic activity, cellular growth, and germination. Seeds have many cells and tissues that die over time, [1] and these deaths can be delayed or increased by environmental conditions the seed experiences. Very generally, small seeds, especially from weedy species and annuals ...
The results of a germination test are commonly expressed as germinative capacity or a germination percentage, which is the percentage of seeds that germinate during a period of time, ending when germination is practically complete. During extraction and processing, white spruce seeds gradually lost moisture, and total germination increased.
A Film coating, a layer of thin film applied to the seed typically less than 10% of the mass of the original seed. Encrustment, where the applied material is typically 100%–500% of the original seed mass, but the shape is still discernible. Pellet, where the applied material is so thick that the seed's original shape is not discernible.
Dormancy should not be confused with seed coat dormancy, external dormancy, or hardheadedness, which is caused by the presence of a hard seed covering or seed coat that prevents water and oxygen from reaching and activating the embryo. It is a physical barrier to germination, not a true form of dormancy (Quinliven, 1971; Quinliven and Nichol ...
For most plants species the radicle dies some time after seed germination, causing the development of a fibrous root system, which lacks a main downward-growing root. Most trees begin life with a taproot, [ 3 ] but after one to a few years the main root system changes to a wide-spreading fibrous root system with mainly horizontal-growing ...
Once the seeds have ripened, its color brown and texture papery, they are immediately sown in a cold frame in deep, moist, fertile soil. Though the plants can grow under semi-shade or full-shaded conditions, the seeds require light for it to germinate. In addition, since this is a perennial plant, seeds are not
Pollen itself is not the male gamete. [4] It is a gametophyte, something that could be considered an entire organism, which then produces the male gamete.Each pollen grain contains vegetative (non-reproductive) cells (only a single cell in most flowering plants but several in other seed plants) and a generative (reproductive) cell.
Psyllium husk after processing Plantago afra, a member of the plant genus from which psyllium can be derived. Psyllium (/ ˈ s ɪ l i əm /), or ispaghula (/ ˌ ɪ s p ə ˈ ɡ uː l ə /), is the common name used for several members of the plant genus Plantago whose seeds are used commercially for the production of mucilage.
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