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    Seed dormancy - Wikipedia

    • Secondary dormancy occurs in some non-dormant and post dormant seeds that are exposed to conditions that are not favorable for germination, like high temperatures. It is caused by conditions that occur after the seed has been dispersed. The mechanisms of secondary dormancy are not yet fully understood but might involve the loss of sensitivity in receptors in t… 展开

    Summary

    Seed dormancy is an evolutionary adaptation that prevents seeds from germinating during unsuitable ecological … 展开

    Overview

    True dormancy or inherent (or innate) dormancy is caused by conditions within the seed that prevent germination even if the conditions are favorable. Imposed dormancy is caused by the external conditions that r… 展开

    Exogenous dormancy

    Exogenous dormancy is caused by conditions outside the embryo and is often broken down into three subgroups:
    Dormancy caused by an impermeable seed coat is known as physical dormancy. Physical dorman… 展开

    Endogenous dormancy

    Endogenous dormancy is caused by conditions within the embryo itself, and it is also often broken down into three subgroups: physiological dormancy, morphological dormancy and combined dormancy, each … 展开

    Combinational dormancy

    Combinational dormancy occurs in some seeds, where dormancy is caused by both exogenous (physical) and endogenous (physiological) conditions. Some Iris species have both hard impermeable seeds coats and physiologica… 展开

    Further reading

    • Hanson, Thor (2016). The Triumph of Seeds: How Grains, Nuts, Kernels, Pulses, and Pips Conquered the Plant Kingdom and Shaped Human History. Basic Books. ISBN 978-0465097401. 展开