Osmotic adjustment in Sorghum bicolor (L. Moench) grown under moisture stress in soil and osmotically modified solution cultures

Chapman S.C. and Fischer K.S. (1988) Osmotic adjustment in Sorghum bicolor (L. Moench) grown under moisture stress in soil and osmotically modified solution cultures. Plant and Soil, 107 1: 57-62. doi:10.1007/BF02371544


Author Chapman S.C.
Fischer K.S.
Title Osmotic adjustment in Sorghum bicolor (L. Moench) grown under moisture stress in soil and osmotically modified solution cultures
Journal name Plant and Soil   Check publisher's open access policy
ISSN 0032-079X
Publication date 1988-01-01
Sub-type Article (original research)
DOI 10.1007/BF02371544
Volume 107
Issue 1
Start page 57
End page 62
Total pages 6
Publisher Kluwer Academic Publishers
Subject 1111 Nutrition and Dietetics
1110 Nursing
1102 Cardiovascular Medicine and Haematology
Abstract Sorghum (Sorghum bicolor L. Moench) plants were grown in solution culture and stressed at three rates of decreasing leaf water potential (-0.123, -0.068 and -0.029 MPa day-1) achieved by the incremental addition of an osmoticum, polyethylene glycol (PEG) 6000 to the solutions. Plants were also grown in soil and given different amounts of water which resulted in rates of decreasing leaf water potentials of -0.130 and -0.073 MPa day-1. The rate of stress and the culture system influenced the accumulation of solutes in the cell, but not cell volume. A rapid stress (-0.123 and -0.130 MPa day-1) to approximately -1.6 MPa leaf water potential resulted in 0.75 and 0.16 MPa of osmotic adjustment in the PEG and soil culture respectively. At moderate stress (-0.068 and -0.073 MPa day-1) respective values were 1.68 and 0.58 MPa. There were some visual symptoms in the solution grown plants characteristic of uptake of high molecular weight PEG. However the relative growth rates of these plants were equal to or greater than those of the soil grown plants. In view of the differences in plant water status of soil and PEG solution cultured plants it was concluded that the use of the latter system would not be entirely suitable for some studies of drought resistance in sorghum, as related to crop performance in the field.
Keyword leaf water potential
osmotic adjustment
polyethylene glycol
sorghum
water stress
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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