Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Genetic Regulation of Vascular Tissue Patterning in Arabidopsis

Francine M. Carland, Barbara L. Berg, Jonathan N. FitzGerald, Suchaya Jinamornphongs, Timothy Nelson and Brian Keith
The Plant Cell
Vol. 11, No. 11 (Nov., 1999), pp. 2123-2137
DOI: 10.2307/3871014
Stable URL: http://www.jstor.org/stable/3871014
Page Count: 15
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Genetic Regulation of Vascular Tissue Patterning in Arabidopsis
Preview not available

Abstract

Plants transport water and nutrients through a complex vascular network comprised of interconnected, specialized cell types organized in discrete bundles. To identify genetic determinants of vascular tissue patterning, we conducted a screen for mutants with altered vascular bundle organization in Arabidopsis cotyledons. Mutations in two genes, CVP1 and CVP2 (for cotyledon vascular pattern), specifically disrupt the normal pattern of vascular bundles in cotyledons, mature leaves, and inflorescence stems. The spatial distribution of the procambium, the precursor to mature vascular tissue, is altered in cvp1 and cvp2 embryos, suggesting that CVP1 and CVP2 act at a very early step in vascular patterning. Similarly, in developing stems of cvp1 and leaves of cvp2, the pattern of vascular differentiation is defective, but the maturation of individual vascular cells appears to be normal. There are no discernible alterations in cell morphology in cvp2 mutants. In contrast, cvp1 mutants are defective in directional orientation of the provascular strand, resulting in a failure to establish uniformly aligned vascular cells, and they also show a reduction in vascular cell elongation. Neither cvp1 nor cvp2 mutants displayed altered auxin perception, biosynthesis, or transport, suggesting that auxin metabolism is not generally affected in these mutants.

Page Thumbnails

  • Thumbnail: Page 
[2123]
    [2123]
  • Thumbnail: Page 
2124
    2124
  • Thumbnail: Page 
2125
    2125
  • Thumbnail: Page 
2126
    2126
  • Thumbnail: Page 
2127
    2127
  • Thumbnail: Page 
2128
    2128
  • Thumbnail: Page 
2129
    2129
  • Thumbnail: Page 
2130
    2130
  • Thumbnail: Page 
2131
    2131
  • Thumbnail: Page 
2132
    2132
  • Thumbnail: Page 
2133
    2133
  • Thumbnail: Page 
2134
    2134
  • Thumbnail: Page 
2135
    2135
  • Thumbnail: Page 
2136
    2136
  • Thumbnail: Page 
2137
    2137