Les rhizotrons peuvent-ils être utilisés pour l'étude de la ramification des racines primaires nodales du maïs (Zea mays L) ?

Abstract

fig 2) for selecting the roots in contact with the transparent wall. Table / gives the number of evaluation performed for each method versus year and depth. The number of secondary roots per cm of primary roots versus internode and depth is given in figures 3 and 4 for the differents methods. The variability inherent in the ramification process is important and can attain 30%. The coefficients of variation are greater for the results obtained with rhizotrons. They include the consequences of the specific perturbations due to the method. The observations made through the acrylic wall are representative of the ramification kinetics inside the box. Thus, figure 5 allows comparison of the different counts performed in the rhizotrons on the basis of the slope variation between 2 consecutive internodes. This figure shows that the acrylic wall did not disturb the secondary ramification, and that the results of the observations performed through the transparent face are proportional to those of the total number of ramifications on the observed primary roots. But these data can be extended to the field conditions for the first internodes (E 2 to E 5 ) only. This is certainly caused by the soil temperature differences between the root boxes and the field which is especially important at the end of the vegetative growing season (fig 6) when the laterals on internode 6 and 7 are initiated.Zea mays L = maize / method / rhizotron / needle board / root development / number of secondary roots

Evaluation of parameters describing the root system architecture of field grown maize plants (Zea mays L.)

“…In the proximal part (between 0 and 40 cm), where some data are available in the literature, our results on the branching density of axile roots were in close agreement with those which were obtained on other cultivars or other environmental conditions ( Jordan et al, 1992;Morita et al, 1992;. However, in this experiment, a strong acropetal decrease of the branching density was shown.…”

Effects of Aluminium on the Adventitious Root System, Aerial Biomass and Grain Yield of Maize Grown in the Field and in a Rhizotron

“…Each compartment of the rhizotron was equipped with a perforated wooden board, which diverted most of the root system, allowing only a few roots to expand against the glass pane (according to Jordan, 1992). This avoided root overlapping, which could be a bothersome and frequent occurrence otherwise.…”

Ara-Rhizotron: An Effective Culture System to Study Simultaneously Root and Shoot Development of Arabidopsis

“…In other species, such as maize (Jordan, 1992) or trees (Page`s, 1992), the rhizotron has often been used for root studies because it allows two-dimensional root development and facilitates root observations. In this study, we propose a culture system adapted from this rhizotron and compared plants grown in this system to plants grown in pots.…”