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The action potential of Dionaea muscipula Ellis
The view that the high mechanosensitivity of the sensory hair results from its anatomy and not from a specialized perception mechanism is stressed, it is proposed that trap closure is triggered by a rise in the cytoplasmic concentration of Ca2+ or a Ca2-activated regulatory complex, which must exceed a threshold concentration.
Gravity sensing in tip-growing cells.
Tissue stresses in organs of herbaceous plants III. Elastic properties of the tissues of sunflowers hypocotyl and origin of tissue stresses
A one-dimensiona l model is formulated which, based on symplastic, turgor-induced extensions of tissues which differ in moduli of elasticity, predicts the occurrence of longitudinal TSs in stem-like organs, and gives their dependence onTurgor pressure.
Rapid Changes in the Pattern of Electric Current around the Root Tip of Lepidium sativum L. following Gravistimulation.
A close connection is suggested between the current and the transduction of information from the root cap to the elongation zone following graviperception in the cap following gravistimulation of the root.
ANALYSIS OF EXTENSION AND CURVATURE DURING THE GRAVIRESPONSE IN LEPIDIUM ROOTS
Intact roots of Lepidium sativum were photographed at 1.5to 6-min intervals before and after being tilted from a vertical to a horizontal position to study the extension patterns leading to curvature and subsequent resumption of straight growth.
The influence of Ca2+ on the action potential in mesophyll cells ofDionaea muscipula Ellis
The influence of different ions on the action potential of Dionaea muscipula was measured by impaling microelectrodes into mesophyll cells of small leaf stripes which carried a trigger hair and elicited by bending the hair.
Morphogenesis and Polarity of Tubular Cells with Tip Growth
The reason for this specialized treatment of cell morphogenesis is best explained through an examination of tip growth, the locally restricted enlargement of a cell that usually has a tubular shape (Frey-Wyssling 1959).
Role of the microtubule cytoskeleton in gravisensing Chara rhizoids.
It is concluded that the arrangement of microtubules is essential for the polar cytoplasmic zonation and the functionally polar organization of the actin cytoskeleton which is responsible for the motile processes in rhizoids.
Tissue stresses in organs of herbaceous plants. II: Determination in three dimensions in the hypocotyl of sunflower
The longitudinal and transverse forces involved in tissue stresses (TSs) and the stresses themselves, were determined for the hypocotyl of Helianthus annuus L. using Poisson ratios and data from…