A gradient of endogenous calcium forms in mucilage of graviresponding roots of Zea mays.
作者： RANDY MOORE , W.MARK FONDREN
DOI: 10.1093/OXFORDJOURNALS.AOB.A087523
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摘要: Agar blocks that contacted the upper sides of tips horizontally-oriented roots Zea mays contain significantly less calcium (Ca) than lower such roots. This gravity-induced gradient Ca forms prior to onset gravicurvature, and does not form across vertically-oriented or agravitropic mutants. These results indicate (1) can be collected from mucilage graviresponding roots, (2) gravity induces a downward movement endogenous in overlying root tip, (3) this (4) formation is consequence gravicurvature. are consistent with being trigger for subsequent redistribution growth effectors (e.g. auxin) induce differential
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