Monitoring hairy-root growth by image analysis

1991 ◽  
Vol 9 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Graeme D. Coles ◽  
D. J. Abernethy ◽  
Mary C. Christey ◽  
A. J. Conner ◽  
B. K. Sinclair
Keyword(s):  
Image Analysis ◽  
Root Growth ◽  
Hairy Root

Effects of Gibberellic Acid on Hairy Root Growth in Datura innoxia

1989 ◽  
Vol 134 (5) ◽  
pp. 633-636 ◽  
Author(s):  
Hiroshi Ohkawa ◽  
Hiroshi Kamada ◽  
Hiroshi Sudo ◽  
Hiroshi Harada
Keyword(s):  
Gibberellic Acid ◽  
Root Growth ◽  
Hairy Root ◽  
Datura Innoxia

Population Balance Approach to Modeling Hairy Root Growth

2004 ◽  
Vol 20 (3) ◽  
pp. 872-879 ◽  
Author(s):  
B. Han ◽  
J.C. Linden ◽  
N.P. Gujarathi ◽  
S.R. Wickramasinghe
Keyword(s):  
Root Growth ◽  
Hairy Root ◽  
Population Balance ◽  
Balance Approach

Using an aerosol deposition model to increase hairy root growth in a mist reactor

2007 ◽  
Vol 96 (5) ◽  
pp. 881-891 ◽  
Author(s):  
Melissa J. Towler ◽  
Barbara E. Wyslouzil ◽  
Pamela J. Weathers
Keyword(s):  
Root Growth ◽  
Hairy Root ◽  
Aerosol Deposition ◽  
Deposition Model ◽  
Mist Reactor

Monitoring of root growth and redox conditions in paddy soil rhizotrons by redox electrodes and image analysis

2010 ◽  
Vol 341 (1-2) ◽  
pp. 221-232 ◽  
Author(s):  
Hannes Schmidt ◽  
Thilo Eickhorst ◽  
Rolf Tippkötter
Keyword(s):  
Image Analysis ◽  
Root Growth ◽  
Paddy Soil ◽  
Redox Conditions ◽  
Redox Electrodes

Comparison of porosity in a Chernozemic clay loam soil under long-term conventional tillage and no-till

1998 ◽  
Vol 78 (4) ◽  
pp. 619-629 ◽  
Author(s):  
J. J. Miller ◽  
E. G. Kokko ◽  
G. C. Kozub
Keyword(s):  
Image Analysis ◽  
Root Growth ◽  
Surface Soil ◽  
Conventional Tillage ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Seedling Root ◽  
No Till ◽  
Loam Soil

Tillage practice can alter soil structure, porosity and the size distribution of pores. Consequently, this study was conducted to compare the long-term (since 1968) effects of conventional tillage (CT) using a heavy-duty cultivator and no-till (NT) on structure and porosity of a Dark Brown Chernozem (clay loam) soil in southern Alberta. Number and porosity of total, round, intermediate and elongated pores, maximum equivalent circular diameter (MECD), and mean circularity of pore sizes 50–500 µm (P-150), 500–1000 µm (P-500) and >1000 µm (P-1000) diameter were quantified. These parameters were determined for three depths (0–10, 10–20 and 20–30 cm) and two orientations (vertical, horizontal) using UV-dye impregnated soil sections and image analysis. The surface soil (0–10 cm) of CT was dominantly granular-spongy, but for NT it was dominantly crack to massive. Since tillage treatments were not replicated, only general trends on the effect of tillage and its interaction with depth and orientation are given and probability levels are not reported. Tillage treatment had an influence on P-150 and P-500 pores but little or no influence on P-1000 pores. Mean number and porosity of total and intermediate P-500 pores, which are the most important pore size class for seedling root growth in these soils, were higher for CT than NT for the surface soil, but were higher for NT than CT for the subsoil. For example, the total porosity of P-500 pores was 2.21% for CT and 1.95% for NT at the 0- to10-cm depth, 3.80% for NT and 2.27% for CT at the 10- to 20-cm depth, and 3.18% for NT and 2.80% for CT at the 20- to 30-cm depth. These results suggested a higher potential for seedling root growth in the surface soil of CT, but a greater potential for root growth in the subsoil of NT. Key words: structure, porosity, image analysis, tillage

Corrigendum to: Cotton root growth in compacted Vertisol (Grey Vertosol). II. Correlation with image analysis parameters

Soil Research ◽  
2001 ◽  
Vol 39 (6) ◽  
pp. 1468
Author(s):  
D. C. McKenzie ◽  
S. E. Greenhalgh ◽  
A. J. Koppi ◽  
D. A. MacLeod ◽  
A. B. McBratney
Keyword(s):  
Image Analysis ◽  
Root Growth ◽  
Direct Measurement ◽  
Lateral Roots ◽  
Differential Staining ◽  
Staining Procedure ◽  
Assessment Procedure ◽  
Image Analysis System ◽  
Near Surface ◽  
Cotton Plants

A differential staining procedure was developed to study the degree of association between soil structural form parameters, derived using the SOLICON image analysis system, and the root growth of cotton plants. Under the climatic conditions that prevailed during the experimental period, severe impedance of taproots was associated with a clod width in the range 28 mm to ≥30 mm and a macroporosity value in the range 0.00–0.04 m3/m3. The new root assessment procedure detected soil structural features, for example, well-aerated zones adjacent to near-surface roots in degraded soil not shown by other methods and allowed direct measurement of the proportion of a root’s surface in contact with the soil atmosphere. However, the assessment method should be complemented by direct measurement of the morphology of nearby cotton taproots that have been pulled from the soil. Features that can be assessed include root flatness, the number of lateral roots, root obliquity, and the degree of tapering. In this experiment the lack of flattening in roots pulled from the compacted soil suggested that poor aeration was a bigger problem for the cotton plants than mechanical impedance. Root deformation was not associated with a large decline in lint yield at this site because the crop was irrigated frequently and did not suffer any nutritional stress, and the relatively steep field slope permitted rapid surface drainage.

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