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Utilization of atmospheric H 2 S by plant foliar tissue: Its interaction with sulfate assimilation
Author(s) -
Poortinga Arne M.,
De Kok Luit J.
Publication year - 1995
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19951580111
Subject(s) - sulfate , spinach , sulfur , thiol , assimilation (phonology) , chemistry , environmental chemistry , biochemistry , organic chemistry , philosophy , linguistics
Exposure of spinach cotyledons to H 2 S or sulfate resulted in a concentration and time dependent accumulation of water‐soluble non‐protein thiols. The increase in thiol content upon a combined exposure to H 2 S and sulfate was comparable to that of the sum of the increases obtained by the individual exposures. However, it never exceeded the maximal level attained upon exposure to H 2 S alone. Evidently, plants are able to utilize atmospheric H 2 S as a sulfur source, which competes with the assimilatory sulfate reduction for thiol synthesis.