Skip to main content
×
×
Home

Cluster root development in Grevillea robusta (Proteaceae). II. The development of the endodermis in a determinate root and in an indeterminate, lateral root

  • KEITH R. SKENE (a1), JOAN M. SUTHERLAND (a1), JOHN A. RAVEN (a1) and JANET I. SPRENT (a1)
    • Published online: 01 April 1998
Abstract

Light, fluorescence and electron microscopy were employed to follow the development of the endodermis in cluster roots and lateral roots of Grevillea robusta A. Cunn. ex R. Br. Endodermal cells had three different origins: rootlet endodermis arose from the rootlet meristem; endodermis covering the primordium shortly after initiation came from division of parental endodermis; cells at the junction between parent and rootlet endodermis developed from re-differentiated rootlet cortical cells. In the cluster root, the Casparian band formed in three ways, and was not initially present opposite the two sets of single xylem elements in the rootlet stele. A new clearing technique was developed that allowed visualization of xylem, suberized endodermis, Casparian band formation and phenolic compounds. In lateral roots, endodermal differentiation was asynchronous, but was related to position relative to protoxylem poles. However, the observed delay began before these poles had differentiated. At the tip of mature rootlets, which are determinate, the endodermis terminates in a ‘dome’ of cells, with the initial cell differentiating as an endodermal cell. Results are discussed in terms of determinate development in roots and the spatial and temporal contexts within which this development takes place.

Copyright
Corresponding author
To whom correspondence should be addressed. E-mail: k.r.skene@dundee.ac.uk
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The New Phytologist
  • ISSN: -
  • EISSN: -
  • URL: /core/journals/new-phytologist
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords

Type Description Title
PDF

 PDF (1.1 MB)
1.1 MB

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 2 *
Loading metrics...

Abstract views

Total abstract views: 19 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 16th August 2018. This data will be updated every 24 hours.