HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (16) Citing Articles via Google Scholar Google Scholar Articles by Costa, C. Articles by Smith, D. L. Search for Related Content PubMed Articles by Costa, C. Articles by Smith, D. L. Agricola Articles by Costa, C. Articles by Smith, D. L. Related Collections Agroclimatology Plant Analysis

A Sampling Method for Measurement of Large Root Systems with Scanner-Based Image Analysis

^a Univ. of Passo Fundo, Passo Fundo, RS, 99001-970, Brazil
^b Agriculture and Agri-Food Canada, Ottawa, Eastern Cereal and Oilseed Research Centre, Ottawa, ON, Canada
^c Dep. of Plant Science, McGill Univ., Macdonald Campus, 21,111 Lakeshore, Ste-Anne-de-Bellevue, Quebec, Canada H9X 3V9

View larger version (37K): [in a new window]   Fig. 1 Side and top views of the air-stirring–based device for randomly mixing roots

View larger version (13K): [in a new window]   Fig. 2 Effectiveness of lettuce spinner in removing excess water from root subsamples as a function of spinning time (R2 = 0.99, P < 0.05)

View larger version (11K): [in a new window]   Fig. 3 Relationship between spun fresh weight and root length of maize genotypes

View larger version (13K): [in a new window]   Fig. 4 Effect of measured root subsample size on the number of root crossovers (using 200 by 300 mm tray size). Bars extending above and below each point indicate ±1 SE

View larger version (15K): [in a new window]   Fig. 5 Mean root lengths of the randomly collected subsamples (0.5 g fresh wt.) from the mixing device. Bars extending above and below each point indicate ±1 SE

View larger version (15K): [in a new window]   Fig. 6 Sample size as determined by standard parametric and nonparametric (bootstrap) procedures

View larger version (15K): [in a new window]   Fig. 7 Relationship between sample size and half-length 95% confidence intervals for root length of three genotypes and for the mean of all genotypes

View larger version (13K): [in a new window]   Fig. 8 Relationship between total dry masses and total root length of three maize genotypes. Each point represents the overall mean for a given genotype