HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Goldman, I. L. Articles by Patterson, R. P. Search for Related Content PubMed Articles by Goldman, I. L. Articles by Patterson, R. P. Agricola Articles by Goldman, I. L. Articles by Patterson, R. P.

A Detrimental Interaction of Subsoil Aluminum and Drought Stress on the Leaf Water Status of Soybean

Dep. of Agronomy, Univ. of Wisconsin, Madison, WI, 53706
USDA-ARS and Dep. of Crop Sci., 3127 Ligon St., Box 7631, North Carolina State Univ., Raleigh, NC 27695-7631
Dep. of CropSci., Williams Hall, North Carolina State Univ., Raleigh, NC 27695-7620

^* Corresponding author.

Drought and subsoil A1 are major concerns which face soybean [Glycine max (L.) Merr.] producers in the southeastern USA. However, the interaction of these two factors is not clearly understood. This study was designed to characterize the combined effect of these two stress factors on soybean water status. A greenhouse experiment was conducted, with two levels of subsoil A1 saturation (6 and 71%), and two levels of drought stress (watered and unwatered). A split plot experimental design with three replications was employed. Soil treatments were applied via a soil layering technique using topsoil of a Goldsboro sandy loam (fine-loamy, siliceous, thermic, Aquic Paleudult). The top layer in all pots consisted of the unamended topsoil. In the lower layer, highly contrasting A1 saturation levels were obtained by amending one half of the pots with A1₂(SO₄)₃. Data were collected during a 14-d moisture stress treatment imposed at podfilling (R3). Traits measured were leaf water potential, relative water content, transpiration, and diffusive resistance. A detrimental interaction between subsoil AI and drought was observed in all traits measured. Plants grown in the presence of both stress factors had lower levels of leaf relative water content and water potential, and a lower transpiration rate than predicted additively by independent stress factors. In general, subsoil AI had much greater effects on leaf water status in drought-stressed soybean plants than in the wellwatered plants. These results suggest that hindered root growth in highly AI-saturated subsoils may have limited the ability of the plant to withstand drought. Soybean producers in regions characterized by drought and subsoil AI should consider the incorporation of Altolerant germplasm into management systems. Field studies including water stress as a variable should be interpreted with regard to this interaction, if soil A1 is present.

Received for publication January 29, 1988.

This article has been cited by other articles:

				C. Welcker, C. The, B. Andreau, C. De Leon, S. N. Parentoni, J. Bernal, J. Felicite, C. Zonkeng, F. Salazar, L. Narro, et al. Heterosis and Combining Ability for Maize Adaptation to Tropical Acid Soils: Implications for Future Breeding Strategies Crop Sci., October 27, 2005; 45(6): 2405 - 2413. [Abstract] [Full Text] [PDF]