Comparison of the lipid composition of oat root and coleoptile plasma membranes. [Avena sativa L]
- Portland State Univ., OR (USA)
- Univ. of Washington, Seattle (USA)
The total lipid composition of plasma membranes (PM), isolated by the phase partitioning method from two different oat (Avena sativa L.) tissues, the root and coleoptile, was compared. In general, the PM lipid composition was not conserved between these two organs of the oat seedling. Oat roots contained 50 mole % phospholipid, 25 mole % glycolipid, and 25 mole % free sterol, whereas comparable amounts in the coleoptile were 42, 39, and 19 mole %, respectively. Individual lipid components within each lipid class also showed large variations between the two tissues. Maximum specific ATPase activity in the root PM was more than double the activity in the coleoptile. Treatment of coleoptile with auxin for 1 hour resulted in no detectable changes in PM lipids or extractable ATPase activity. Differences in the PM lipid composition between the two tissues that may define the limits of ATPase activity are discussed.
- OSTI ID:
- 6968381
- Journal Information:
- Plant Physiology; (USA), Vol. 90:3; ISSN 0032-0889
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELL MEMBRANES
CHEMICAL COMPOSITION
ATP-ASE
AUXINS
COLEOPTILE
ENZYME ACTIVITY
LIPIDS
OATS
PLANT TISSUES
ROOTS
SEEDLINGS
ACID ANHYDRASES
BODY
CELL CONSTITUENTS
CEREALS
ENZYMES
GRASS
HYDROLASES
LILIOPSIDA
MAGNOLIOPHYTA
MEMBRANES
ORGANIC COMPOUNDS
PHOSPHOHYDROLASES
PLANT GROWTH REGULATORS
PLANTS
TISSUES
551000* - Physiological Systems