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SULPHUR DIOXIDE METABOLISM IN SOY‐BEAN, GLYCINE MAX VAR. BILOXI
Author(s) -
GARSED S. G.,
READ D. J.
Publication year - 1977
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.1469-8137.1977.tb01549.x
Subject(s) - chromosomal translocation , nutrient , botany , biology , glycine , chemistry , biochemistry , ecology , amino acid , gene
SUMMARY First‐trifoliate leaves of four‐leaved soybean plants were exposed to 35 SO 2 in the light or dark, and the uptake and translocation of radioactivity measured. Nearly four times more 35 SO 2 was taken up in the light (stomata open) than in the dark (stomata closed) but approximately 50% of the radioactivity was leached from the leaf surface in the dark compared with 5% in the light. A greater proportion of the source‐leaf radioactivity was translocated in the dark but, in absolute terms, the quantity of radioactivity moved was less. Radioactive products were found in all parts of the plant after exposure in both light and dark. The expanding trifoliate leaf contained the greatest concentration of translocated radioactivity in both cases. Light and dark pre‐ and post‐treatments had little effect on uptake of 35 SO 2 or translocation of the products. 35 SO 4 2− was detected in the nutrient solution within 1 h of exposure of leaves to 35 SO 2 .