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Accumulation and transport of phenol, 2-nitrophenol, and 4-nitrophenol in plant cuticles.
Ecotoxicol Environ Saf 1985; 10(2):239-52EE

Abstract

Partition (K) and permeance (P) coefficients have been determined for phenol, 2-nitrophenol, and 4-nitrophenol with isolated cuticles from mature tomato (Lycopersicon) and green pepper (Capsicum) fruits and from the adaxial surface of rubber (Ficus) leaves. Plant cuticular membranes (CM) are composed of a lipophilic, insoluble polymer matrix (MX) membrane and soluble cuticular lipids (SCL). Partition coefficients of the phenols (pH 3.0) for the system MX/buffer (MX/b) ranged from 43.6 to 164.9 and could be predicted from n-octanol/buffer (o/b) partition coefficients using the equation log KMX/b = 0.363 + 0.952 log Ko/b where (r = 0.986). In CM the K values were lower, especially for 4-nitrophenol, ranging from 32.4 to 110.8. The role of hydrogen bonding in partitioning of phenols into cuticles is discussed. Permeance coefficients for the cuticular membranes [P(CM)] ranged from 10(-10) (Ficus) to 10(-8) m sec-1 (Lycopersicon, Capsicum), with 2-nitrophenol permeating more rapidly than the other two phenols. Extraction of the SCL increased the permeance coefficients [P(MX)] by factors of approximately 5 (Lycopersicon), 50 (Capsicum), and 1000 (Ficus), respectively. The transport-limiting layer in plant cuticles acts as a diffusion and solubility barrier.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

4085383

Citation

Shafer, W E., and J Schönherr. "Accumulation and Transport of Phenol, 2-nitrophenol, and 4-nitrophenol in Plant Cuticles." Ecotoxicology and Environmental Safety, vol. 10, no. 2, 1985, pp. 239-52.
Shafer WE, Schönherr J. Accumulation and transport of phenol, 2-nitrophenol, and 4-nitrophenol in plant cuticles. Ecotoxicol Environ Saf. 1985;10(2):239-52.
Shafer, W. E., & Schönherr, J. (1985). Accumulation and transport of phenol, 2-nitrophenol, and 4-nitrophenol in plant cuticles. Ecotoxicology and Environmental Safety, 10(2), pp. 239-52.
Shafer WE, Schönherr J. Accumulation and Transport of Phenol, 2-nitrophenol, and 4-nitrophenol in Plant Cuticles. Ecotoxicol Environ Saf. 1985;10(2):239-52. PubMed PMID: 4085383.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Accumulation and transport of phenol, 2-nitrophenol, and 4-nitrophenol in plant cuticles. AU - Shafer,W E, AU - Schönherr,J, PY - 1985/10/1/pubmed PY - 1985/10/1/medline PY - 1985/10/1/entrez SP - 239 EP - 52 JF - Ecotoxicology and environmental safety JO - Ecotoxicol. Environ. Saf. VL - 10 IS - 2 N2 - Partition (K) and permeance (P) coefficients have been determined for phenol, 2-nitrophenol, and 4-nitrophenol with isolated cuticles from mature tomato (Lycopersicon) and green pepper (Capsicum) fruits and from the adaxial surface of rubber (Ficus) leaves. Plant cuticular membranes (CM) are composed of a lipophilic, insoluble polymer matrix (MX) membrane and soluble cuticular lipids (SCL). Partition coefficients of the phenols (pH 3.0) for the system MX/buffer (MX/b) ranged from 43.6 to 164.9 and could be predicted from n-octanol/buffer (o/b) partition coefficients using the equation log KMX/b = 0.363 + 0.952 log Ko/b where (r = 0.986). In CM the K values were lower, especially for 4-nitrophenol, ranging from 32.4 to 110.8. The role of hydrogen bonding in partitioning of phenols into cuticles is discussed. Permeance coefficients for the cuticular membranes [P(CM)] ranged from 10(-10) (Ficus) to 10(-8) m sec-1 (Lycopersicon, Capsicum), with 2-nitrophenol permeating more rapidly than the other two phenols. Extraction of the SCL increased the permeance coefficients [P(MX)] by factors of approximately 5 (Lycopersicon), 50 (Capsicum), and 1000 (Ficus), respectively. The transport-limiting layer in plant cuticles acts as a diffusion and solubility barrier. SN - 0147-6513 UR - https://www.unboundmedicine.com/medline/citation/4085383/Accumulation_and_transport_of_phenol_2_nitrophenol_and_4_nitrophenol_in_plant_cuticles_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0147-6513(85)90071-5 DB - PRIME DP - Unbound Medicine ER -