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

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

Linking the physiological parameters of nitrate uptake with root morphology and topology in wheat (Triticum durum) and citrus (Citrus volkameriana) rootstock

2002 ◽  
Vol 80 (5) ◽  
pp. 494-503 ◽  
Author(s):  
A Sorgonà ◽  
G Cacco
Keyword(s):  
Root Morphology ◽  
Triticum Durum ◽  
Topological Index ◽  
Nitrate Uptake ◽  
Nitrate Concentration ◽  
Root Systems ◽  
Total Root Length ◽  
Root Tips ◽  
And Topology ◽  
Citrus Volkameriana

The relationships between net nitrate uptake and root morphology and topology were investigated in wheat (Triticum durum Desf.) and citrus (Citrus volkameriana Ten. & Pasq.) seedlings in which root systems were modified by supplying different nutrient concentrations. Root morphological and topological changes were assessed by the number of root tips, the total root length, and the topological index. The net nitrate uptake process was evaluated during the induction and inhibition "feedback" regulation phases. In wheat seedlings, an increase in the external nitrate concentration, at either high or no phosphate, brought about an increase in number of root tips but did not affect total root length. A similar pattern was observed in citrus seedlings. Citrus seedlings also exhibited a shift in root branching pattern from herringbone to dichotomous with an increase in the external nitrate concentration. Conversely, wheat root topology was unaffected by nutrient treatments. A high level of nitrate supplied to wheat and citrus root systems reduced the full induction of the nitrate uptake rate and cumulative nitrate uptake but increased the half-time of reaching the full induction in net nitrate uptake (t1/2 kind). Finally, a negative correlation between number of root tips and t1/2 kind was found in both species, while only in citrus seedlings was a positive correlation between t1/2 kind and the topological index observed. The data suggest that root morphology has a greater effect on nitrate uptake than root topology.Key words: root morphology, root topology, net nitrate uptake, Citrus volkameriana, Triticum durum.

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