Stimulation of border cell production in response to increased carbon dioxide levels

X. Zhao, I. J. Misaghi, Martha C Hawes

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Field soil atmospheres have higher CO2 and lower O2 concentrations compared with ambient atmosphere, hut little is known about the impact of such conditions on root exudation patterns. We used altered levels of CO2 and O2 relative to ambient conditions to examine the influence of the atmosphere on the production of root border cells by pea (Pisum sativum) root tips. During germination, atmospheres with high CO2 and low O2 inhibited root development and border cell separation in pea seedlings. Later in development, the same atmospheric composition stimulated border cell separation without significantly influencing root growth, increased CO2, not low O2, was responsible for the observed stimulation of border cell number. High CO2 apparently can override endogenous signals that regulate the number of border cells released from pea roots into the rhizosphere. The same conditions that stimulated border cell production in pea had no such effect in alfalfa (Medicago sativa).

Original languageEnglish (US)
Pages (from-to)181-188
Number of pages8
JournalPlant Physiology
Volume122
Issue number1
StatePublished - 2000

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Peas
Carbon Dioxide
Atmosphere
carbon dioxide
peas
Medicago sativa
Cell Separation
cells
Cell Count
Rhizosphere
Meristem
atmospheric chemistry
Germination
Seedlings
soil air
exudation
root tips
Soil
Pisum sativum
alfalfa

ASJC Scopus subject areas

  • Plant Science

Cite this

Stimulation of border cell production in response to increased carbon dioxide levels. / Zhao, X.; Misaghi, I. J.; Hawes, Martha C.

In: Plant Physiology, Vol. 122, No. 1, 2000, p. 181-188.

Research output: Contribution to journalArticle

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