Page 82 - The Miracle In The Seed
P. 82

THE MIRACLE IN THE SEED


                    Seeds With Special Protection

                    An aril, which looks like a small, fleshy swelling, is the fine pro-
                tective covering surrounding the seed of some plants. Animals usually
                devour this protective semi-layer rather than the seed itself. Some of
                the seeds protected by an aril are as follows:
                    In autumn, the yew tree (Taxus baccata) produces vivid red arils
                that contrast wonderfully with its dark green needle-like leaves. The
                                                       arils’ sweet taste is particu-
                                                       larly enticing for black-
                                                       birds, but they spit out the
                                                       bitter-tasting seeds. This is
                                                       extremely important, since
                                                       the seeds must be pierced
                                                       by the birds’ sharp beaks
                                                       before germination can take
                                                       place. Should blackbirds
                                                       swallow the seeds, they are
                                                       resilient enough to suffer no
                                                       damage in the birds’ diges-
                                                       tive tract. The yew seeds al-
                                                       so contain extremely toxic
                                                       alkaloids, which cause
                                                       heart failure in living crea-
                                                       tures ingesting them. This
                                                       substance is used as poison
                                                       on the tips of arrows and al-
                                                       so made into toxic prepara-
                                                       tions, but are often used in
                                                       treatments – the most im-
                                                       portant of which are morp-
                                                       hine,   strychnine    and
                                                       atropine.
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