Effect of environmental factors on water utilization and boron accumulation and translocation in sugarcane

概要

論文の詳細を見る
Rates of boron (B) accumulation and/or water utilization of 3 month-old sugarcane plants were altered by changes in temperature, relative humidity, light intensity and duration of exposure to light. The effects of the environment on boron accumulation were not directly dependent upon effects on water utilization. Boron accumulation was affected more than water uptake by increasing root and air temperatures from 8℃ to 37℃, and by raising the pH of the external solution from 5.7 to 7.0. Contrarily, water utilization decreased more than B accumulation when the relative humidity was increased from 30+__-5% to 95 +__-5%, when light intensity was decreased or daily exposure to light was shortened and when the plants were pretreated with 5 × 10^<-5> M phenylmercuric acetate, an anti-transpirant. The absorption of B by roots was experimentally separated from its subsequent translocation to the shoots. Absorption of B by roots was at least partially under metabolic control, since uptake from a 2 mg/liter B solution could occur against a concentration gradient. Translocation of B from the roots to the shoot occurred passively in the transpiration stream.
日本植物生理学会の論文