Die Zellwandzusammensetzung von Hypokotylen des Senfkeimlings (Sinapis alba L.) bei Wachstumshemmung durch Inhibitoren oder Phytochrom

Summary During inhibition of hypocotyl elongation in the mustard seedling by actinomycin D, hydroxyproline, and continuous far-red via phytochrome 730 the synthesis of cell-wall carbohydrates is impaired in the same manner. Independent of the treatment 12 hrs after its beginning at a relative inhibition of hypocotyl elongation of 80–90% the relative inhibition of the cell-wall carbohydrate content is uniformly about 30–35%. No significant quantitative nor apparent qualitative differences in the sugar and uronic acid content of the pectic, hemicellulosic, and -cellulosic cell-wall fraction could be detected.