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Effect of Atrazine on Physiological Processes in Leaves 1
Author(s) -
Imbamba Simeon K.,
Moss Dale N.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100060023x
Subject(s) - atrazine , photorespiration , photosynthesis , biology , respiration , botany , horticulture , agronomy , pesticide
We fed 2‐chloro‐4‐(ethylamino)‐6‐(isopropylamino‐s‐triazine (atrazine) through the base of excised leaves of atrazine‐tolerant and ‐susceptible species. Atrazine suppressed CO 2 uptake in all species. This was shown to be due primarily to inhibition of the photosynthetic reactions and only to a slight extent to the stomatal closure caused by atrazine. Atrazine did not cause stomatal closure in CO 2 ‐free air. Atrazine inhibited photorespiration but did not inhibit oxidation of externally supplied glycolate. It had no effect on dark respiration.