The coleoptile sheath of wheat impedes oxygen transport to seminal roots

C. J. THOMSON; W. ARMSTRONG

doi:10.1111/j.1365-3040.1990.tb02145.x

The coleoptile sheath of wheat impedes oxygen transport to seminal roots

C. J. THOMSON, W. ARMSTRONG

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3 Citations (Scopus)

Abstract

Abstract Wheat, Triticum aestivum cv. Gamenya, seedlings were grown for 4d in acrated 0.5 mol m⁻³ CaSO₄ solution. A cylindrical platinum‐electrode and vernier microscope were used to examine the effects of the colcoptile sheath on O₂ transport from shoots to seminal roots via the internal gas‐space system, and on the clongation of the root tip. By removing the colcoptile sheath, O₂ concentrations at the root tip in an O₂‐free medium at 5°C increased from 0.017 to 0.17 mol m⁻³ O₂ when 100 kPa O₂ was around the shoots. When the shoots were in air, the separation of the colcoptile sheath from the primary leaf caused the rate of root clongation in the anoxic medium to increase by two fold.

Original language	English
Pages (from-to)	405-406
Number of pages	2
Journal	Plant, Cell & Environment
Volume	13
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-3040.1990.tb02145.x
Publication status	Published - 1 Jan 1990
Externally published	Yes

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title = "The coleoptile sheath of wheat impedes oxygen transport to seminal roots",

abstract = "Abstract Wheat, Triticum aestivum cv. Gamenya, seedlings were grown for 4d in acrated 0.5 mol m−3 CaSO4 solution. A cylindrical platinum‐electrode and vernier microscope were used to examine the effects of the colcoptile sheath on O2 transport from shoots to seminal roots via the internal gas‐space system, and on the clongation of the root tip. By removing the colcoptile sheath, O2 concentrations at the root tip in an O2‐free medium at 5°C increased from 0.017 to 0.17 mol m−3 O2 when 100 kPa O2 was around the shoots. When the shoots were in air, the separation of the colcoptile sheath from the primary leaf caused the rate of root clongation in the anoxic medium to increase by two fold.",

keywords = "colcoptile sheath, gas spaces, oxygen, transport, Triticum aestivum, wheat",

author = "THOMSON, {C. J.} and W. ARMSTRONG",

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TY - JOUR

T1 - The coleoptile sheath of wheat impedes oxygen transport to seminal roots

AU - THOMSON, C. J.

AU - ARMSTRONG, W.

PY - 1990/1/1

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N2 - Abstract Wheat, Triticum aestivum cv. Gamenya, seedlings were grown for 4d in acrated 0.5 mol m−3 CaSO4 solution. A cylindrical platinum‐electrode and vernier microscope were used to examine the effects of the colcoptile sheath on O2 transport from shoots to seminal roots via the internal gas‐space system, and on the clongation of the root tip. By removing the colcoptile sheath, O2 concentrations at the root tip in an O2‐free medium at 5°C increased from 0.017 to 0.17 mol m−3 O2 when 100 kPa O2 was around the shoots. When the shoots were in air, the separation of the colcoptile sheath from the primary leaf caused the rate of root clongation in the anoxic medium to increase by two fold.

AB - Abstract Wheat, Triticum aestivum cv. Gamenya, seedlings were grown for 4d in acrated 0.5 mol m−3 CaSO4 solution. A cylindrical platinum‐electrode and vernier microscope were used to examine the effects of the colcoptile sheath on O2 transport from shoots to seminal roots via the internal gas‐space system, and on the clongation of the root tip. By removing the colcoptile sheath, O2 concentrations at the root tip in an O2‐free medium at 5°C increased from 0.017 to 0.17 mol m−3 O2 when 100 kPa O2 was around the shoots. When the shoots were in air, the separation of the colcoptile sheath from the primary leaf caused the rate of root clongation in the anoxic medium to increase by two fold.

KW - colcoptile sheath

KW - gas spaces

KW - oxygen

KW - transport

KW - Triticum aestivum

KW - wheat

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U2 - 10.1111/j.1365-3040.1990.tb02145.x

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VL - 13

SP - 405

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JO - Plant, Cell & Environment

JF - Plant, Cell & Environment

IS - 4

ER -

The coleoptile sheath of wheat impedes oxygen transport to seminal roots

Abstract

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