The root cap at the forefront.
Two essential functions are associated with the root tip: first of all, it ensures a sustained growth of the root system thanks to its role in protecting the stem cell zone responsible for cell division and differentiation. In addition, it is capable of detecting environmental changes at the root cap level, and this property provides a crucial advantage considering that this tissue is located at the forefront of soil exploration. Using results obtained mainly with the plant model Arabidopsis, we summarize the description of the structure of root cap and the known molecular mechanisms regulating its functioning. We briefly review the various responses of the root cap related to the interaction between the plant and its environment, such as phototropism, gravitropism, hydrotropism, mineral composition of the soil and protection against pathogens.
Arnaud
Carole
C
UMR 6191 CEA, Centre National de la Recherche Scientifique, laboratoire de biologie du développement des plantes, université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France.
Bonnot
Clémence
C
Desnos
Thierry
T
Nussaume
Laurent
L
D017360:Arabidopsis / Q000502:physiology; D009747:Nutritional Physiological Phenomena; D018521:Plant Physiological Phenomena; D018517:Plant Roots / Q000254:growth & development / Q000502:physiology*; D012987:Soil; D014867:Water / Q000378:metabolism
D012987:Soil; D014867:Water