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Seeds are often considered as an important delivery system of genetic information. Cryopreservation of recalcitrant seed is the hardest due to intolerance to low temperature and low water content. [52] However, plant vitrification solution can solve the problem and help recalcitrant seed (Nymphaea caerulea) cryopreserve. [53] [54]
Many gardeners scoop out the seeds of the tomato and let them sit in water for about 3-4 days until the seeds sink to the bottom of the jar — part of a process called wet extraction — before ...
While this cryopreservation conservation strategy can be used on all plants, it is often only used under certain circumstances: 1) crops with recalcitrant seeds e.g. avocado, [2] coconut [3] 2) seedless crops such as cultivated banana and plantains [4] or 3) crops that are clonally propagated such as cassava, potato, garlic and sweet potato. [5 ...
A chilling unit in agriculture is a metric of a plant's exposure to chilling temperatures. Chilling temperatures extend from freezing point to, depending on the model, 7 °C (45 °F) or even 16 °C (60 °F). [3] Stone fruit trees and certain other plants of temperate climate develop next year's buds in the summer.
It has been adapted by and to other countries (such as Canada) in various forms. A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.
Hardiness of plants is defined by their native extent's geographic location: longitude, latitude and elevation. These attributes are often simplified to a hardiness zone. In temperate latitudes, the term most often describes resistance to cold, or "cold-hardiness", and is generally measured by the lowest temperature a plant can withstand.
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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 ...