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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 ...
Dormancy caused by an impermeable seed coat is known as physical dormancy. Physical dormancy is the result of impermeable layer(s) that develops during maturation and drying of the seed or fruit. [12] This impermeable layer prevents the seed from taking up water or gases. As a result, the seed is prevented from germinating until dormancy is broken.
Download as PDF; Printable version ... Part of a series on: Animal dormancy; Torpor; Hibernation. Hibernaculum; HIT ... Wikipedia® is a registered ...
Cold stratification is a process that induces the dormancy breaking prior to light emission that promotes germination . [5] Four degrees Celsius is cool enough to end dormancy for most cool dormant seeds, but some groups, especially within the family Ranunculaceae and others, need conditions cooler than -5 C
Aestivation (Latin: aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter. Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. [ 1 ]
• As of January 2008, India was reportedly considering restarting its LENR program after 14 years of dormancy.29 U.S. LENR researchers also have reported results that support the phenomena of At the March 2009 American Chemical Society annual meeting, researchers at U.S. Navy SPAWAR Pacific reported excess energy,33 nuclear particles,34 and
It orchestrates seasonal growth, development, reproduction, migration, and dormancy that affect survivorship and reproductive success. [14] Changes in photoperiod over days and seasons created the opportunity for the development of internal clocks and eventually create circadian and circannual rhythms. [3]
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