Effect of Far Red Light on Root Growth and on Xylem Sap In Cotton (Gossypium hirsutum L.)

概要

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Far red light given before darkness highly increased drought resistance of cotton plants. There was higher stomatal resistance in leaves resulting in a lower transpiration rate. The aim of this work was to examine the effect of far red light on root growth and its effect on water transfer measured by analysis of xylem sap obtained after cutting the hypocotyl. Short-term and long-term treatments of far red light were used. In the presence of far red light, the amount of xylem sap decreased while root resistance increased. Qualitative analysis of the xylem sap indicated an increase of amino acid content and an alteration of potassium flux. Calcium flux was not significantly modified. The change in potassium content of xylem sap is discussed with regard to turgor and drought resistance.
日本植物生理学会の論文