Hulkrakne koonusjas moodustis, mis katab ja kaitseb juure tipumeristeemi ning osaleb raskusjõu tajumises. Moodustub juure tipumeristeemi juurekübara tüvirakkudest ning koosneb sambakujulisest keskmisest (columella) ja külgmisest osast.
A section of tissue at the tip of a plant root that protects the root apical meristem and contains statocytes which are involved in gravity perception in plants.
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