The Growth of the Primary Roots and Root Hairs of Sinapis alba and Lepidium sativus in Triton X‐100

Abstract

Seeds of Lepidium and Sinapis were germinated and grown for 3 days in different concentrations of Triton X‐100 (0.001–0.1 % v/v). The elongation of the primary root was slightly stimulated by low concentrations. In concentrations above 0.01 %, Triton inhibited root growth and forked root hairs developed. The hairs elongated both at the apex and at the base, exhibited protoplasmic streaming and activity of particulate non‐specific esterase. In contrast the growth of the hypocotyl of both Lepidium and Sinapis diminished steadily in increasing concentrations of Triton. Triton also affected the percentage germination of Lepidium, which increased or decreased according to the concentration used. The changes in root growth and germination and the appearance of branched root hairs in abundance coincide with a change in the detergent solution from monomer to aggregated molecules.

Aspects of the biological activity of surfactants that are potential eradicants of apple mildew

“…Use of DDAB has been considered for eradicating powdery mildews on foliage (Haapala, 1973). (Kirby & Frick, Amongst the non-ionic octyl phenol ethoxylate compounds tested (Tritons) the increasing activity against ascospore discharge of V. inaequalis and against growth of T. viride in vitro with decreasing ethylene oxide content and therefore decreasing water solubility parallels their mildew eradicant activity (Triton X q g > X114 > XIOO > X102) (Clifford & Hislop, 1975).…”

Studies on Octylphenoxy Surfactants: V. Toxicity to Cowpea Leaves and Effects of Spray Application Parameters

“…Less research has been directed toward study of the chemical environment for plant growth in soilless mixes. Much of this work has involved investigation of chemical relationships in bark-based rather than peat-based media (1,3,6,9,16,18).…”

“…(5) and be toxic to cells in culture (J, 4), isolated cells (25,27), roots (9,12), and leaves (7,8,14). Limited data are available on surfactant toxicity in relation to the chemistry and physicochemical properties of surfactant solutions, including critical micelle concentration (3,4,7,8) and surface tension (4,12,14).…”