Histological and Cytological Responses of Roots to Growth-Regulating Substances

Anatomical Modifications of Bean Roots Following Treatment with 2,4-D

“…In the monocotyledons investigated by Levan (1939) and Carlton (1943) the root-tip swellings were slight and were reported to be the result primarily of great increase in size of cortical cells, although Carlton did observe some proliferation of the pericycle in roots of Allium and Tulipa. The anatomical nature of these swellings, as observed in the roots of different plants, seems at first, however, to be at variance.…”

“…. Carlton \ 1943) treated the roots of various bulb-forming monocotyledons with each of six growth-regulating substances and examined them anatomicallv. The cereals were found to be more resistant than broad-leaved plants, although they also exhibited these modifications.…”

Anatomical Response of St. Augustinegrass to Aminocyclopyrachlor Treatment

“…However, typical monocot response is less injurious than a typical eudicot response. Anatomical responses of monocots are similar to eudicots and include: the formation of new lateral and adventitious roots, swelling of roots and stems, curling of the stem, proliferation of parenchyma tissue, and abnormal leaf and inflorescence development (Carlton 1943;Eames 1949;Kaufman 1953;Struckmeyer 1951;Watson 1950, Wilde 1951. Despite these responses, most agree that grasses are more tolerant of auxinic compounds than broadleaf plants (Struckmeyer 1951;Wilde 1950).…”

Anatomical Modifications of Bean Roots Following Treatment With 2,4‐d

“…Some anatomical studies, however, of abnormal modifications of roots resulting from treatment with growthregulating substances have been made. Carlton \ 1943) treated the roots of various bulb-forming monocotyledons with each of six growth-regulating substances and examined them anatomicallv. Although his various plants responded differently to treatment, he reported root-tip enlargement to be caused primarily by an increase in the size of the cortical cells rather than by any great increase in cell number.…”