Circular Vessels and the Control of Vascular Differentiation in Plants

T. SACHS*, D. COHEN

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

The occurrence of vessels in the form of rings is used as a critical example for a hypothesis about the control of the pattern of cells in vascular tissues. These vessels, rare in intact plants, are common in the basal or root side of tissues close to transverse wounds of bean seedlings, radish storage tissues, and other plant material. Their formation is promoted, as are normal vascular tissues, by developing parts of the shoot or by a source of the hormone auxin. They are also found in grafts where cells of opposite polarities are close together, and in cut plants where vascular induction occurs from the direction of the roots and is therefore opposite to the original polarity of the tissue. Circular vessels are found, therefore, where the flux of auxin and possibly other signals controlling vascular differentiation is expected to follow a circular route. They show that differentiation is a response of individual cells to the flux rather than the gradient or concentration of the hormonal signals and suggest a hormonal interpretation of differences between apical and basal callus growth.

Original languageEnglish
Pages (from-to)22-26
Number of pages5
JournalDifferentiation
Volume21
Issue number1-3
DOIs
StatePublished - 1982

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