Thiol Accumulation and Cysteine Desulfhydrase Activity in H_2S-Fumigated Leaves and Leaf Homogenates of Cucurbit Plants

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概要

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• Fumigation of both, cucurbit plants and cucurbit leaf homogenates with hydrogen sulfide (H_2S) resulted in an increase in soluble thiol, mainly glutathione and cysteine. In leaf homogenates this increase was counteracted or prevented by the addition at 1 mM of inhibitors of pyridoxalphosphate dependent enzymes or of products of the cysteine desulfhydrase reaction. These compounds inhibited cysteine desulfhydrase activity, but did not severely affect O-acetylserine sulfhydrylase activity at this concentration. These results provide circumstantial evidence that cysteine desulfhydrase in its reverse reaction, but not O-acetylserine sulfhydrylase participates in the assimilation of atmospheric H_2S.

• 日本植物生理学会の論文

著者

• Kok Luit

  Department Of Plant Biology University Of Groningen

• Rennenberg Heinz

  Fraunhofer-institute For Atmospheric Environmental Research (ifu)

• Schtitz Barbel

  Fraunhofer-Institute for Atmospheric Environmental Research (IFU)

関連論文

• Thiol Accumulation and Cysteine Desulfhydrase Activity in H_2S-Fumigated Leaves and Leaf Homogenates of Cucurbit Plants

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