Abstract
Acquisition of gravisensitivity in the uppermost nodes of flowering stems ofAvena fatua occurs during the period when the internode is extending from 30 to 100 mm. Within individual leaf sheath bases this event correlates with the development of 14–16 statocytes (cells containing sedimentable statoliths) in lateral association with each vascular bundle. This further correlates with the development of an ability by the leaf sheath base to control both the rate of transport of applied3H-IAA and the level of endogenous IAA in response to the gravity vector. Estimates of the level of endogenous IAA in pooled extracts were similar using either HPLC with coulometric detection or GC-MS measurement of the molecular ion.
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Now: Long Ashton Research Station, Weed Research Division.
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Wright, M. The acquisition of gravisensitivity during the development of nodes ofAvena fatua . J Plant Growth Regul 5, 37–47 (1986). https://doi.org/10.1007/BF02027385
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DOI: https://doi.org/10.1007/BF02027385