Interactions of seed water content with phytochrome initiated germination of Rumex crispus (L.) seeds

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概要

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• Light-initiated germination levels of Rumex crispus L. seeds were reduced equally by imbibition in mannitol or polyethylene glycol 6000 (PEG 6000) solutions of the same Ψ_W, indicating that the effects of each were through Ψ_W. Reduction of the water content of the seeds with these osmotica decreased the effectiveness of the far-red absorbing form of phytochrome (P_<fr>) in causing germination. However, reduced water content had no effect on the slopes or saturation points of fluence/response curves which indicates that Ψ_W has no effect on the number of P_<fr> receptor sites. The time during which a portion of the seeds were still photoreversible by far-red light was increased by imbibition in PEG 6000, indicating a direct effect of Ψ_W on a reaction involving phytochrome. No qualitative effect of PEG 6000 on the onset of secondary dormancy was seen; however, its effect on the relative rate of appearance of secondary dormancy was equivocal.

• 日本植物生理学会の論文

著者

• Duke Stephen

  South. Weed Sci. Lab. U.s. Dep. Agric. Ag. Res. Serv.

• Duke Stephen

  Southern Weed Science Laboratory

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• Interactions of seed water content with phytochrome initiated germination of Rumex crispus (L.) seeds

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