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.

Chilling root temperature causes rapid ultrastructural changes in cortical cells of cucumber (Cucumis sativus L.) root tips

Seong Hee Lee, Adya P. Singh, Gap Chae Chung, Yoon Soo Kim and In Bae Kong
Journal of Experimental Botany
Vol. 53, No. 378 (November 2002), pp. 2225-2237
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/23697627
Page Count: 13
  • Download ($42.00)
  • Cite this Item
Chilling root temperature causes rapid ultrastructural changes in cortical cells of cucumber (Cucumis sativus L.) root tips
Preview not available

Abstract

Examination of root tips from cucumber (Cucumis sativus L.) seedlings grown at 8 °C for varying periods ranging from 15 min to 96 h, showed marked changes in the ultrastructure of cortical cells within only 15 min of exposure. Greater parts of the cortex were affected with longer periods of exposure, but the sequence of morphological changes in cell components was similar to that found for the roots exposed for 15 min. The effect of chilling injury included alterations in cell walls, nuclei, ER, mitochondria, plastids, and ribosomes. The extent of alterations varied greatly among cells, moderate to severe alterations to cell components being observable among adjoining cells. The measurements of root pressure using the root pressure probe showed a sudden, steep drop in the root pressure in response to lowering of the temperature of the bathing solution from 25 °C to 8 °C. These observations are discussed in the light of the information available on the ultrastructural and biochemical characteristics of the effect of cold exposure in chilling-sensitive plants.

Page Thumbnails

  • Thumbnail: Page 
[2225]
    [2225]
  • Thumbnail: Page 
2226
    2226
  • Thumbnail: Page 
2227
    2227
  • Thumbnail: Page 
2228
    2228
  • Thumbnail: Page 
2229
    2229
  • Thumbnail: Page 
2230
    2230
  • Thumbnail: Page 
2231
    2231
  • Thumbnail: Page 
2232
    2232
  • Thumbnail: Page 
2233
    2233
  • Thumbnail: Page 
2234
    2234
  • Thumbnail: Page 
2235
    2235
  • Thumbnail: Page 
2236
    2236
  • Thumbnail: Page 
2237
    2237