Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 31:1203-1208 (1991)
© 1991 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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 Similar articles in this journal
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 Google Scholar
Google Scholar
Right arrow Articles by Read, J. J.
Right arrow Articles by Tieszen, L. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Read, J. J.
Right arrow Articles by Tieszen, L. L.
Agricola
Right arrow Articles by Read, J. J.
Right arrow Articles by Tieszen, L. L.

Carbon Isotope Discrimination, Gas Exchange, and Water-Use Efficiency in Crested Wheatgrass Clones

John J. Read*, Douglas A. Johnson and Kay H. Asay

USDA-ARS, Crops Res. Lab, 1701 Center Ave., Fort Collins, CO 80526
USDA-ARS, Forage and Range Res. Lab., Utah State Univ., Logan, UT 84322-6300

Larry L. Tieszen

Biology Dep., Augustana College, Sioux Falls, SD 57197

* Corresponding author.

Carbon isotope discrimination ({Delta}) has been proposed as a criterion in selecting for water-use efficiency (WUE) in C3 crop species. This study was conducted to determine associations among {Delta}, leaf instantaneous WUE (WUEi), and shoot WUE (WUE3) in clones of crested wheatgrass [Agropyron desertorum (Fischer ex Link) Schultes] previously selected for low, medium, and high {Delta}. Nine clones (three in each {Delta} class) were grown in a greenhouse in pots weighed every third day and brought to either 0.03 or 0.12 kg kg–1 gravimetric water content. Leaf gas exchange rates and water potentials were determined at 2-wk intervals until plant harvest at 12 wk. Under drought, the ranking of {Delta} classes for stomatal conductance agreed with previous and present {Delta} classifications, and midday leaf water potentials averaged {approx}0.4 MPa lower in the low than in the medium or high {Delta} class. Shoot dry weight and {Delta} decreased with drought and were correlated positively under well-watered conditions (r = 0.77*, df = 7, P < 0.05), but not under drought. Although {Delta} and leaf intercellular CO2 concentration of individual clones were correlated positively at each water level, the expected differences between {Delta} classes in {Delta}, WUEi, and WUE3 were obtained only under drought. A lower {Delta} in low than high {Delta} class under drought was associated with greater shoot dry weight, WUE3, and WUEi. Across water levels, large negative correlations were found between {Delta} and WUEi (r = -0.95**, df = 16, P < 0.01) or WUE3 (r = –0.89**, df = 16). These results indicate that selection for low carbon isotope discrimination will improve water-use efficiency in crested wheat-grass under drought.

Joint contribution of the USDA-ARS, USDA-Cooperative States Res. Service (Grant no. 86-CSRS-2-2962), and the Utah Agric. Exp. Stn., Logan UT 84322-4810. Journal Paper no. 4065.

Received for publication September 27, 1990.


This article has been cited by other articles:


Home page
 Crop Sci.Home page
R. C. Johnson, A. A. Hopkins, and M. A. Evans
Carbon Isotope Discrimination, Selection Response, and Forage Production of Tall Fescue in Contrasting Environments
Crop Sci., May 1, 2008; 48(3): 1048 - 1054.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
M. DaCosta and B. Huang
Deficit Irrigation Effects on Water Use Characteristics of Bentgrass Species
Crop Sci., June 20, 2006; 46(4): 1779 - 1786.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
S. M. Impa, S. Nadaradjan, P. Boominathan, G. Shashidhar, H. Bindumadhava, and M. S. Sheshshayee
Carbon Isotope Discrimination Accurately Reflects Variability in WUE Measured at a Whole Plant Level in Rice
Crop Sci., October 27, 2005; 45(6): 2517 - 2522.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
K. B. Jensen, K. H. Asay, D. A. Johnson, and B. L. Waldron
Carbon Isotope Discrimination in Orchardgrass and Ryegrasses at Four Irrigation Levels
Crop Sci., September 1, 2002; 42(5): 1498 - 1503.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
O. Merah, E. Deleens, I. Souyris, M. Nachit, and P. Monneveux
Stability of Carbon Isotope Discrimination and Grain Yield in Durum Wheat
Crop Sci., May 1, 2001; 41(3): 677 - 681.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
A.B. Frank and J.D. Berdahl
Gas Exchange and Water Relations in Diploid and Tetraploid Russian Wildrye
Crop Sci., January 1, 2001; 41(1): 87 - 92.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
D. P. Malinowski and D. P. Belesky
Adaptations of Endophyte-Infected Cool-Season Grasses to Environmental Stresses: Mechanisms of Drought and Mineral Stress Tolerance
Crop Sci., July 1, 2000; 40(4): 923 - 940.
[Abstract] [Full Text]

Home page
 Crop Sci.Home page
R.C. Johnson and L. Yangyang
Water Relations, Forage Production, and Photosynthesis in Tall Fescue Divergently Selected for Carbon Isotope Discrimination
Crop Sci., November 1, 1999; 39(6): 1663 - 1670.
[Abstract] [Full Text]

Home page
 Crop Sci.Home page
B. Martin, C. G. Tauer, and R. K. Lin
Carbon Isotope Discrimination as a Tool to Improve Water-Use Efficiency in Tomato
Crop Sci., November 1, 1999; 39(6): 1775 - 1783.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Plant Registrations Soil Science Society of America Journal
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 1991 by the Crop Science Society of America.