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The effects of long‐term open‐air fumigation with SO 2 on a field crop of broad bean ( Vicia faba L.) II Effects on growth components, leaf area development and elemental composition
Author(s) -
KROPFF M. J.,
MOOI J.,
GOUDRIAAN J.,
SMEETS W.,
LEEMANS A.,
KLIFFEN C.
Publication year - 1989
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.1469-8137.1989.tb02412.x
Subject(s) - vicia faba , fumigation , point of delivery , biology , phaseolus , crop , agronomy , horticulture , growing season , chlorophyll , botany
SUMMARY Faba bean crops ( Vicia faba L.) were exposed to elevated SO 2 concentrations in three different years in an open‐air field exposure system for the controlled release of air pollutants. The treated crops were exposed to an average SO, concentration of 165μg m ‐3 in 1985, 62μg m ‐3 in 1986 and 74μg m ‐3 in 1988. The ambient SO 2 concentration was about 10 μg m ‐3 . Plant height, number of internodes and number of pods were not affected by SO 2 . The specific leaf area was reduced in the plants exposed to SO 2 at the end of the growing season. Leaf area development was strongly affected during the pod‐filling period in 1985 and 1988 as a result of leaf injury and defoliation in the fumigated plots. In 1986 a similar trend in leaf area reduction was observed in the early reproductive phase. N and Mg content of the different organs was unaffected by SO 2 . The S content was strongly elevated in the leaves and pods of the fumigated plants, and the Ca content of the leaves was reduced by SO 2 . Chlorophyll content of different leaf numbers was unaffected by SO 2 .