The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipes
- 3 September 2008
- journal article
- editorial
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 148 (3), 1557-1569
- https://doi.org/10.1104/pp.108.125518
Abstract
Using two ecotypes of Stellaria longipes with contrasting responses to shade, we found that plants can differ in their responses to similar light cues, reflecting adaptations to their natural habitat. It was also observed that the plants could distinguish between distinct shade signals. Furthermore, the activity of wall modifying proteins, expansins and xyloglucan endotransglucosylase/hydrolase(s) (XTHs) was regulated during these responses. However, only expansin activity and gene expression profiles correlated with observed growth trends. The differential expression of expansins was light signal specific and ecotype specific and could account for both the trends in growth and their magnitude. We have thus established a potential molecular basis for the observed plasticity in responses to shade.Keywords
This publication has 7 references indexed in Scilit:
- The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipesPlant Physiology, 2008
- Shade avoidanceNew Phytologist, 2008
- Growth of the plant cell wallNature Reviews Molecular Cell Biology, 2005
- Phytochromes and Shade-avoidance Responses in PlantsAnnals of Botany, 2005
- The XTH Family of Enzymes Involved in Xyloglucan Endotransglucosylation and Endohydrolysis: Current Perspectives and a New Unifying NomenclaturePlant and Cell Physiology, 2002
- Loosening of plant cell walls by expansinsNature, 2000
- Far-Red Radiation Reflected from Adjacent Leaves: An Early Signal of Competition in Plant CanopiesScience, 1990