Hydrotropism: the current state of our knowledge.
The response of roots to a moisture gradient has been reexamined, and positive hydrotropism has been demonstrated in recent years. Agravitropic roots of a pea mutant have contributed to the studies on hydrotropism. The kinetics of hydrotropic curvature, interactions between hydrotropism and gravitropism, moisture gradients required for the induction of hydrotropism, the sensing site for moisture gradients, characteristics of hydrotropic signal and differential growth, and calcium involvement in signal transduction have been subjects of these studies. This review summarizes the current state of our knowledge on hydrotropism in roots.
Takahashi
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Institute of Genetic Ecology, Tohoku University, Sendai, Japan.
D002118:Calcium / Q000378:metabolism / Q000502:physiology; D002614:Chelating Agents / Q000494:pharmacology; D004533:Egtazic Acid / Q000494:pharmacology; D016695:Glycosyltransferases / Q000378:metabolism / Q000502:physiology; D018522:Gravitropism / Q000187:drug effects / Q000502:physiology*; D018532:Pisum sativum / Q000235:genetics / Q000254:growth & development*; D018521:Plant Physiological Phenomena; D018518:Plant Root Cap / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development / Q000502:physiology; D018517:Plant Roots / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development* / Q000502:physiology; D018523:Tropism / Q000187:drug effects / Q000502:physiology*; D014867:Water / Q000378:metabolism* / Q000502:physiology; D003313:Zea mays
D002614:Chelating Agents; D014867:Water; D004533:Egtazic Acid; D016695:Glycosyltransferases; C073693:xyloglucan endotransglycosylase; D002118:Calcium