کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2057761 | 1075926 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Induction of ß-glucosidase activity in maize coleoptiles by blue light illumination Induction of ß-glucosidase activity in maize coleoptiles by blue light illumination](/preview/png/2057761.png)
SummaryThe 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, 10 min after the onset of illumination, peaking after 30 min 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 30 min 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.
Journal: Journal of Plant Physiology - Volume 163, Issue 5, 3 March 2006, Pages 538–545