Plant age and the phosphorus uptake characteristics of trimmed and untrimmed corn root systems

1975 ◽  
Vol 42 (1) ◽  
pp. 227-239 ◽  
Author(s):  
A. Jungk ◽  
S. A. Barber
Keyword(s):  
Phosphorus Uptake ◽  
Root Systems ◽  
Plant Age ◽  
Corn Root

scholarly journals Water and phosphorus uptake by upland rice root systems unraveled under multiple scenarios: linking a 3D soil-root model and data

2020 ◽  
Author(s):  
Trung Hieu Mai ◽  
Pieterjan De Bauw ◽  
Andrea Schnepf ◽  
Roel Merckx ◽  
Erik Smolders ◽  
...  
Keyword(s):  
Upland Rice ◽  
Phosphorus Uptake ◽  
Root Systems ◽  
Multiscale Model ◽  
P Uptake ◽  
Water Dynamics ◽  
Small Scale ◽  
P Availability ◽  
P Deficiency ◽  
Plant P Uptake

AbstractBackground and aimsUpland rice is often grown where water and phosphorus (P) are limited and these two factors interact on P bioavailability. To better understand this interaction, mechanistic models representing small-scale nutrient gradients and water dynamics in the rhizosphere of full-grown root systems are needed.MethodsRice was grown in large columns using a P-deficient soil at three different P supplies in the topsoil (deficient, suboptimal, non-limiting) in combination with two water regimes (field capacity versus drying periods). Root architectural parameters and P uptake were determined. Using a multiscale model of water and nutrient uptake, in-silico experiments were conducted by mimicking similar P and water treatments. First, 3D root systems were reconstructed by calibrating an architecure model with observed phenological root data, such as nodal root number, lateral types, interbranch distance, root diameters, and root biomass allocation along depth. Secondly, the multiscale model was informed with these 3D root architectures and the actual transpiration rates. Finally, water and P uptake were simulated.Key resultsThe plant P uptake increased over threefold by increasing P and water supply, and drying periods reduced P uptake at high but not at low P supply. Root architecture was significantly affected by the treatments. Without calibration, simulation results adequately predicted P uptake, including the different effects of drying periods on P uptake at different P levels. However, P uptake was underestimated under P deficiency, a process likely related to an underestimated affinity of P uptake transporters in the roots. Both types of laterals (i.e. S- and L-type) are shown to be highly important for both water and P uptake, and the relative contribution of each type depend on both soil P availability and water dynamics. Key drivers in P uptake are growing root tips and the distribution of laterals.ConclusionsThis model-data integration demonstrates how multiple co-occurring single root phene responses to environmental stressors contribute to the development of a more efficient root system. Further model improvements such as the use of Michaelis constants from buffered systems and the inclusion of mycorrhizal infections and exudates are proposed.

scholarly journals Nitrate Uptake and Partitioning by Corn Root Systems

1985 ◽  
Vol 77 (3) ◽  
pp. 560-566 ◽  
Author(s):  
William L. Pan ◽  
William A. Jackson ◽  
Robert H. Moll
Keyword(s):  
Nitrate Uptake ◽  
Root Systems ◽  
Corn Root

scholarly journals Influences of Season and Cutting Week within a Propagation Cycle on Rooting of ‘Stained Glass’ Coleus Shoot Tip Cuttings Are Not Overcome by Rooting Compound Treatment

2016 ◽  
Vol 26 (5) ◽  
pp. 620-627 ◽  
Author(s):  
Brigitte D. Crawford ◽  
John M. Dole ◽  
Ben A. Bergmann
Keyword(s):  
Root Systems ◽  
Adventitious Rooting ◽  
Plant Age ◽  
Growth Chamber ◽  
Stock Plant ◽  
Stained Glass ◽  
Cycle Number ◽  
Solenostemon Scutellarioides ◽  
Plant Environment ◽  
Quality Ratings

Influence of season of the year, cutting week within a propagation cycle (number of weeks from which a stock plant has been harvested), stock plant age, and rooting compound on postpropagation cutting quality, and adventitious rooting was examined for ‘Stained Glass’ coleus (Solenostemon scutellarioides). Cuttings were of higher quality and produced more robust root systems when a propagation cycle started in summer vs. fall or spring even when cuttings were harvested from stock plants of the same age. Cutting week within a propagation cycle significantly influenced postpropagation cutting quality and rooting when cuttings were harvested over many weeks from the same stock plants and when cuttings were harvested for three propagation events using stock plants of different ages. When cuttings were harvested on the same days from stock plants of three distinct ages, cuttings harvested in the first week were larger with greater root weights but had more yellowed leaves and lower quality ratings compared with the two subsequent cutting weeks, but stock plant age had no effect on any observed parameter. Treatment with rooting compound did not overcome the significant influences of season and cutting week within a propagation cycle whether rooting was carried out in a greenhouse or growth chamber. Shoot and root fresh and dry weights were positively correlated with both daylength and midday instantaneous light of the stock plant environment.

Vertical-Pull Technique for Evaluating Tolerance of Corn Root Systems to Northern and Western Corn Rootworms123

1968 ◽  
Vol 61 (2) ◽  
pp. 373-375 ◽  
Author(s):  
E. E. Ortman ◽  
D. C. Peters ◽  
P. J. Fitzgerald
Keyword(s):  
Root Systems ◽  
Corn Root

scholarly journals THE LITHIUM METHOD OF MEASURING THE EXTENT OF CORN ROOT SYSTEMS

1940 ◽  
Vol 15 (4) ◽  
pp. 761-764 ◽  
Author(s):  
J. D. Sayre ◽  
V. H. Morris
Keyword(s):  
Root Systems ◽  
Corn Root

Nitrate assimilation by decapitated corn root systems: effects of ammonium during induction

1982 ◽  
Vol 24 (3) ◽  
pp. 295-302 ◽  
Author(s):  
C.T. Mackown ◽  
R.J. Volk ◽  
W.A. Jackson
Keyword(s):  
Nitrate Assimilation ◽  
Root Systems ◽  
Corn Root
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