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Title: Localization of lead accumulated by corn plants. [Zea mays L]

Abstract

Light and electron microscopic studies of corn plants (Zea mays L.) exposed to Pb in hydroponic solution showed that the roots generally accumulated a surface Pb precipitate and slowly accumulated Pb crystals in the cell walls. The root surface precipitate formed without the apparent influence of any cell organelles. In contrast, Pb taken up by roots was concentrated in dicytosome vesicles. Dicytosome vesicles containing cell wall material fused with one another to encase the Pb deposit. This encased deposit which was surrounded by a membrane migrated toward the outside of the cell where the membrane surrounding the deposit then fused with the plasmalemma. The material surrounding the deposit then fused with the cell wall. The result of this process was a concentration of Pb deposits in the cell wall outside the plasmalemma. Similar deposits were observed in stems and leaves suggesting that Pb was transported and deposited in a similar manner.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Illinois, Urbana
OSTI Identifier:
6297307
Alternate Identifier(s):
OSTI ID: 6297307
Resource Type:
Journal Article
Journal Name:
Plant Physiol.; (United States)
Additional Journal Information:
Journal Volume: 53
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; LEAD; BIOLOGICAL LOCALIZATION; MAIZE; METABOLISM; CELL WALL; ELECTRON MICROSCOPY; LEAVES; OPTICAL MICROSCOPY; PLANT CELLS; PLANT STEMS; ROOT ABSORPTION; TRANSLOCATION; ABSORPTION; CELL CONSTITUENTS; CEREALS; ELEMENTS; GRASS; METALS; MICROSCOPY; PLANTS; UPTAKE 560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)

Citation Formats

Malone, C., Koeppe, D.E., and Miller, R.J.. Localization of lead accumulated by corn plants. [Zea mays L]. United States: N. p., 1974. Web.
Malone, C., Koeppe, D.E., & Miller, R.J.. Localization of lead accumulated by corn plants. [Zea mays L]. United States.
Malone, C., Koeppe, D.E., and Miller, R.J.. Tue . "Localization of lead accumulated by corn plants. [Zea mays L]". United States.
@article{osti_6297307,
title = {Localization of lead accumulated by corn plants. [Zea mays L]},
author = {Malone, C. and Koeppe, D.E. and Miller, R.J.},
abstractNote = {Light and electron microscopic studies of corn plants (Zea mays L.) exposed to Pb in hydroponic solution showed that the roots generally accumulated a surface Pb precipitate and slowly accumulated Pb crystals in the cell walls. The root surface precipitate formed without the apparent influence of any cell organelles. In contrast, Pb taken up by roots was concentrated in dicytosome vesicles. Dicytosome vesicles containing cell wall material fused with one another to encase the Pb deposit. This encased deposit which was surrounded by a membrane migrated toward the outside of the cell where the membrane surrounding the deposit then fused with the plasmalemma. The material surrounding the deposit then fused with the cell wall. The result of this process was a concentration of Pb deposits in the cell wall outside the plasmalemma. Similar deposits were observed in stems and leaves suggesting that Pb was transported and deposited in a similar manner.},
doi = {},
journal = {Plant Physiol.; (United States)},
number = ,
volume = 53,
place = {United States},
year = {1974},
month = {1}
}