Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 64:557-561 (1979)
© 1979 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (98)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Clarkson, D. T.
Right arrow Articles by Warner, A. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Clarkson, D. T.
Right arrow Articles by Warner, A. J.
Agricola
Right arrow Articles by Clarkson, D. T.
Right arrow Articles by Warner, A. J.
Articles

Relationships between Root Temperature and the Transport of Ammonium and Nitrate Ions by Italian and Perennial Ryegrass (Lolium multiflorum and Lolium perenne)

David T. Clarkson and Alison J. Warner

1 Agricultural Research Council, Letcombe Laboratory, Wantage OX12 9JT England

At root temperature below 14 C the absorption of 15N from NH4+ greatly exceeded that from NO2– by tillers of Lolium multiflorum and Lolium perenne under conditions where pH, external concentration, plant N status, and pretreatment temperature were varied. There was a marked increase in the temperature sensitivity of NO3– transport below 14 C, irrespective of the temperature at which plants were grown previously. A marked increase in the temperature sensitivity was also seen for NH4+ transport, but this occurred at the lower temperature of 10 C. Pretreatment of roots at 8 C lowered this still further to 5 C. Above and below these transition temperatures the Q10 values for NO3– and NH4+ transport were similar. Thus, the increased absorption of NH4+ relative to NO3– at low temperatures seems to be related primarily to the difference in transition temperatures.

It seems possible that NO3– and NH4+ are absorbed through separate regions of the cell membrane differing in lipid composition and phase transition temperatures.




This article has been cited by other articles:


Home page
 Hum Exp ToxicolHome page
E van den Heever, J Allemann, and J. Pretorius
Influence of nitrogen fertilizers on yield and antifungal bioactivity of Tulbaghia violacea L.
Human and Experimental Toxicology, November 1, 2008; 27(11): 851 - 857.
[Abstract] [PDF]

Home page
 J. Environ. Qual.Home page
L. Zotarelli, J. M. Scholberg, M. D. Dukes, and R. Munoz-Carpena
Fertilizer Residence Time Affects Nitrogen Uptake Efficiency and Growth of Sweet Corn
J. Environ. Qual., May 1, 2008; 37(3): 1271 - 1278.
[Abstract] [Full Text] [PDF]

Home page
 Soil Sci.Home page
J. H. Davis, S. M. Griffith, W. R. Horwath, J. J. Steiner, and D. D. Myrold
Fate of Nitrogen-15 in a Perennial Ryegrass Seed Field and Herbaceous Riparian Area
Soil Sci. Soc. Am. J., April 19, 2006; 70(3): 909 - 919.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1979 by the American Society of Plant Biologists