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Cadmium Influence on Respiratory Gas Exchange of Pinus resinosa Pollen
Author(s) -
STRICKLAND RICHARD C.,
CHANEY WILLIAM R.
Publication year - 1979
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1979.tb03203.x
Subject(s) - sucrose , cadmium , pollen , respiration , pinus <genus> , germination , chemistry , oxidative phosphorylation , elongation , botany , respiratory system , horticulture , biochemistry , biology , anatomy , organic chemistry , materials science , ultimate tensile strength , metallurgy
Release of CO 2 and uptake of O 2 by Pinus resinosa Ait. pollen treated with 0, 0.004, 0.045, or 0.450 m M Cd 2+ were determined manometrically. Respiration after 1.5 h was stimulated in the 0.450 m M treatment, but declined sharply after 3.5 h. CO 2 evolution was inhibited more than O 2 uptake. Pretreatment with Cd 2+ inhibited aflization of exogenous sucrose, and conversely, exogenous sucrose did not overcome Cd 2+ effects on gas exchange. Cd 2+ did not act as a classical uncoupler of oxidative phosphorylation. There was no correlation of pollen germination and germ tube elongation with Cd 2+ effects on gas exchange.