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Induction of ß-glucosidase activity in maize coleoptiles by blue light illumination
- Source :
-
Journal of Plant Physiology . Mar2006, Vol. 163 Issue 5, p538-545. 8p. - Publication Year :
- 2006
-
Abstract
- Summary: The role of ß-glucosidase during the phototropic response in maize (Zea mays) coleoptiles was investigated. Unilateral blue light illumination abruptly up-regulated the activity of ß-glucosidase in the illuminated halves, 10min after the onset of illumination, peaking after 30min and decreasing thereafter. The level of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), which is released from DIMBOA glucoside (DIMBOA-Glc) by ß-glucosidase, and its degradation compound 6-methoxy-benzoxazolinone (MBOA) were elevated within 30min in the illuminated halves as compare to the shaded halves, prior to the phototropic curvature. Furthermore, ß-glucosidase inhibitor treatment significantly decreased the phototropic curvature and decreased growth suppression in the illuminated sides. These results suggest that blue light induces the activity of ß-glucosidase in the illuminated halves of coleoptiles causing an increase in DIMBOA biosynthesis and the growth inhibition that leads to a phototropic curvature. [Copyright &y& Elsevier]
- Subjects :
- *GLUCOSIDASES
*BLUE light
*PHOTOTROPISM in animals
*CORN
Subjects
Details
- Language :
- English
- ISSN :
- 01761617
- Volume :
- 163
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Plant Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 19686004
- Full Text :
- https://doi.org/10.1016/j.jplph.2005.05.004