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PHYSIOLOGICAL PROCESSES IN SOYBEAN INHIBITED BY GASEOUS POLLUTANTS BUT NOT BY ACID RAIN
Author(s) -
NORBY R. J.,
RICHTER D. D.,
LUXMOORE R. J.
Publication year - 1985
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1985.tb02759.x
Subject(s) - acid rain , photosynthesis , pollutant , nutrient , chlorophyll , abscission , nitrogen , cultivar , chemistry , chlorophyll a , botany , agronomy , horticulture , biology , organic chemistry
S ummary The responses of several physiological processes and indices were studied in soybean plants [ Glycine max (L.) Merr. cv. ‘Davis’] exposed to combinations of polluted air (0.1 μl l −1 SO 2 + 0.05 μl l −1 O 3 ) and simulated acid rain (pH 3.4, 4.2 and 5.0). Plants exposed to the gaseous air pollutants had lower foliar concentrations of mineral nutrients and chlorophyll. Leaf abscission was increased and photosynthesis, nitrogen fixation, and vegetative growth were inhibited by SO 2 + O 3 . There was no evidence of adverse effects from acid rain on the physiology of this cultivar, regardless of the gaseous pollutant treatment. In the absence of fundamental physiological dysfunctions, acid rain is unlikely to reduce yield; hence, this study with ‘Davis’ soybeans supports the conclusion of those field studies that have indicated no adverse effects of acid rain on soybeans.