Turgor maintenance by osmotic adjustment, an adaptive mechanism for coping with plant water deficits

2016 ◽  
Vol 40 (1) ◽  
pp. 1-3 ◽  
Author(s):  
Neil C. Turner
Keyword(s):  
Osmotic Adjustment ◽  
Adaptive Mechanism ◽  
Plant Water ◽  
Water Deficits ◽  
Turgor Maintenance

Osmotic Adjustment, Induced by Drought, in Seedlings of Three Eucalyptus Species

1986 ◽  
Vol 13 (5) ◽  
pp. 597 ◽  
Author(s):  
BA Myers ◽  
TF Neales
Keyword(s):  
Water Potential ◽  
Osmotic Adjustment ◽  
Osmotic Potential ◽  
Dry Weight ◽  
Eucalyptus Species ◽  
Plant Water ◽  
Mature Trees ◽  
Mean Values ◽  
Turgor Maintenance ◽  
Plant Water Potential

Osmotic adjustment was observed in pot-grown seedlings of Eucalyptus behriana, E. microcarpa and E. polyanthemos that had been subjected to one and two periods of drought. The osmotic potential of sap expressed from rehydrated leaves was significantly lower in seedlings which had wilted twice (-2.02 � 0.05 MPa) compared with those which had wilted once (-1.86 � 0.05 MPa) and those which had been watered daily (-1.66 � 0.05 MPa). After two drought cycles, seedlings began to wilt at lower mean values of plant water potential (- 3.51 � 0.22 MPa) than those which had not wilted previously (-3.14 � 0.22 MPa). Thus drought-induced osmotic adjustment apparently enhanced turgor maintenance. The ratio of turgid weight to dry weight was slightly, but significantly, smaller in the seedlings subjected to two drought cycles (3.83 � 0.04 MPa) compared with those subjected to one drought cycle (4.05 � 0.04). The osmotic adjustment that was induced by two drought cycles in these seedlings was about one third of the observed seasonal osmotic adjustment in mature trees of E. behriana and E. microcarpa in the field.

Evidence for Spider Mite (Acari: Tetranychidae) Injury-Induced Leaf Water Deficits and Osmotic Adjustment in Peppermint1

1983 ◽  
Vol 12 (2) ◽  
pp. 336-339 ◽  
Author(s):  
Jack D. DeAngelis ◽  
Ralph E. Berry ◽  
G. W. Krantz
Keyword(s):  
Osmotic Adjustment ◽  
Spider Mite ◽  
Leaf Water ◽  
Water Deficits

Water relations of winter wheat. 5. The root system and osmotic adjustment in relation to crop evaporation

1984 ◽  
Vol 102 (2) ◽  
pp. 415-425 ◽  
Author(s):  
M. McGowan ◽  
P. Blanch ◽  
P. J. Gregory ◽  
D. Haycock
Keyword(s):  
Winter Wheat ◽  
Water Potential ◽  
Root System ◽  
Soil Water ◽  
Osmotic Adjustment ◽  
Stomatal Closure ◽  
Soil Water Potential ◽  
Plant Water ◽  
Potential Evaporation ◽  
Plant Water Potential

SummaryShoot and root growth and associated leaf and soil water potential relations were compared in three consecutive crops of winter wheat grown in the same field. Despite a profuse root system the crop grown in the second drought year (1976) failed to dry the soil as throughly as the crops in 1975 and 1977. Measurements of plant water potential showed that the restricted utilization of soil water reserves by this crop was associated with failure to make any significant osmotic adjustment, leading to premature loss of leaf turgor and stomatal closure. The implications of these results for models to estimate actual crop evaporation from values of potential evaporation are discussed.

Water Relations and Osmotic Adjustment of Leaves and Roots of Lupins in Response to Water Deficits 1

Crop Science ◽  
1987 ◽  
Vol 27 (5) ◽  
pp. 977-983 ◽  
Author(s):  
Neil C. Turner ◽  
Walter R. Stern ◽  
Pedro Evans
Keyword(s):  
Water Relations ◽  
Osmotic Adjustment ◽  
Water Deficits ◽  
Leaves And Roots ◽  
Response To Water

Metabolic Responses of Mesophytes to Plant Water Deficits

1982 ◽  
Vol 33 (1) ◽  
pp. 163-203 ◽  
Author(s):  
A D Hanson ◽  
W D Hitz
Keyword(s):  
Metabolic Responses ◽  
Plant Water ◽  
Water Deficits

Osmotic Adjustment and Stomatal Response to Water Deficits in Maize

1992 ◽  
Vol 43 (11) ◽  
pp. 1451-1456 ◽  
Author(s):  
GNANASIRI S. PREMACHANDRA ◽  
HIROHUMI SANEOKA ◽  
KOUNOSUKE FUJITA ◽  
SHOITSU OGATA
Keyword(s):  
Osmotic Adjustment ◽  
Stomatal Response ◽  
Water Deficits ◽  
Response To Water

Leaf Water Relations, Osmotic Adjustment, Cell Membrane Stability, Epicuticular Wax Load and Growth as Affected by Increasing Water Deficits in Sorghum

1992 ◽  
Vol 43 (12) ◽  
pp. 1569-1576 ◽  
Author(s):  
GNANASIRI S. PREMACHANDRA ◽  
HIROFUMI SANEOKA ◽  
KOUNOSUKE FUJITA ◽  
SHOITSU OGATA
Keyword(s):  
Cell Membrane ◽  
Water Relations ◽  
Osmotic Adjustment ◽  
Epicuticular Wax ◽  
Membrane Stability ◽  
Leaf Water ◽  
Leaf Water Relations ◽  
Water Deficits ◽  
Cell Membrane Stability ◽  
Wax Load
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