Sulphide utilization and injuries in hypoxic roots and rhizomes of common reed (Phragmites australis)

Fürtig, Konrad; Rüegsegger, Adrian; Brunold, Christian; Brändle, Roland (1996). Sulphide utilization and injuries in hypoxic roots and rhizomes of common reed (Phragmites australis). Folia Geobotanica, 31(1), pp. 143-151. Springer 10.1007/BF02804003

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The presented investigations have been carried out in order to estimate toxic sulphide levels and to examine detoxification capabilities in roots and rhizomes of the common reed (Phragmites australis). Underground organs of common reed are sensitive towards sulphide above 1 mM applied exogenously under hypoxia. However, certain tolerance may be achieved by sulphide detoxification. Accumulated sulphide is partially used for the synthesis of npn-toxic thiols, mainly glutathione: But the detoxification capacity of the fw in roots and 300 underground organs is limited. Maximum concentrations of thiols are about 60 nmol/g(-1) nmol/g(-1) fw in rhizomes. Energy metabolism is considerably affected by low sulphide concentrations of 1 mM for 4 days, and immediately disturbed by increased concentrations up to 6 mM sulphide. Adenylate energy charge, total adenylates, posthypoxic respiration, and fermentation capacity decrease significantly. Roots are more sensitive than rhizomes.

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