Living plant cells released from the root cap

A regulator of microbial populations in the rhizosphere?

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

A group of cells at the periphery of the root cap separate from plant roots as they move through the soil. Experimentally, these cells can be separated from the root by gentle agitation in water. Detached root cap cells provide a convenient system for comparing cellular and whole-plant responses to fungal and bacterial pathogens. Results with several hos-parasite combinations indicate that these cells express host-specific traits with respect to chemotaxis, binding, and infection. Mutants of Agrobacterium tumefaciens were used to test the hypothesis that recognition of the cells plays a role in establishment of microbial-plant associations. Tn 5 mutants deficient in chemotaxis to the cells exhibit reduced ability to colonize the rhizosphere and to induce crown gall tumorigenesis on pea plants grown in soil. The discovery that cells shed from the cap express hos-specific genes suggests that some microorganisms may have greater access to constituents of the cells than others. This cellular selectivity could have a significant impact on rhizosphere populations.

Original languageEnglish (US)
Pages (from-to)19-27
Number of pages9
JournalPlant and Soil
Volume129
Issue number1
DOIs
StatePublished - Dec 1990

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root cap
rhizosphere
chemotaxis
cells
gall
parasite
soil
pathogen
microorganism
crown galls
mutants
gene
agitation
Agrobacterium radiobacter
carcinogenesis
plant response
peas
microorganisms
parasites
water

Keywords

  • Agrobacterium tumefaciens
  • binding
  • chemotaxis
  • crown gall
  • Pythium catenulatum
  • Pythium dissotocum
  • rhizosphere colonization
  • root cap cells
  • zoospores

ASJC Scopus subject areas

  • Soil Science
  • Plant Science
  • Agronomy and Crop Science

Cite this

Living plant cells released from the root cap : A regulator of microbial populations in the rhizosphere? / Hawes, Martha C.

In: Plant and Soil, Vol. 129, No. 1, 12.1990, p. 19-27.

Research output: Contribution to journalArticle

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