Soluble Proteins in Alfalfa Roots as Related to Cold Hardiness

Abstract

Summiary. Soluble proteins extracted from alfalfa roots of hardy and nonhardy varieties were studied in relation to The present study was conducted to more clearly characterize differences tihat occur in soluble pro-

Changes in antioxidant levels and activities of related enzymes in rice leaves exposed to ozone

“…It is well known that the activity of peroxidase increases under stress conditions such as drought (Stutte and Todd 1967), low temperature (Gerloff et al 1967), and air pollution (Tingey et al 1975;Endress et al 1980;Varshney and Varshney 1985). A significant increase in the guaiacol peroxidase activity using guaiacol as an artificial substrate was brought about after the occurrence of injury by exposure to 03 at a high concentration for 8 h (Fig.…”

Freezing Stress: Systems Biology to Study Cold Tolerance

“…Protein levels were maintained over the winter months dropped as the temperature increased in spring and dormancy was broken. Seasonal changes in total protein content have since been reported in many other species (Parker, 1962;Coleman et al, 1966;Gerloff et al, 1967;Pomeroy et al, 1970;Chen and Li, 1980;and Guy and Haskell, 1987) similar but not universal responses have been observed. These studies also led to the realization that protein changes in response to low temperature exposure were not only quantitative but also qualitative (Siminovich and Briggs, 1953), as it was realized that the proteins synthesized in plants exposed to LT were not identical to those isolated from NA tissues (McGown et al, 1968;Cracker at al., 1969;Davis and Gilbert, 1970;Faw and Jung, 1972;Brown and Bixby, 1975;Faw et al, 1976;Huner at al., 1976;Kacperska-Palacz et al, 1977;Rosas et al, 1986).…”

Effet De L’endurcissement a La Gelee Sur La Teneur en Matiere Seche, en Phosphore Lipidique Et en Proteines Solubles Et Insolubles Du Ble D’hiver

“…Ces r6sultats conclure que ces changements sont reli6s r6flbtent peut-Ctre la r6paration des memplus b la temp6rature de germination qu'b branes ou des changements structurels e I'endurcissement. Siminovitch et al 1968) , chez la luzerne (Medicago sativa) (Gerloff 1966;Jung et al 1967) et chez le bl6 d'hiver (Rochat et Therrien 1975). Des changements au niveau enzymatique ont 6t6 observ6s par Gerloff (1966) et Krasnuk et al (1976) (Willemot 1975;Willemot etal.…”

“…Siminovitch et al 1968) , chez la luzerne (Medicago sativa) (Gerloff 1966;Jung et al 1967) et chez le bl6 d'hiver (Rochat et Therrien 1975). Des changements au niveau enzymatique ont 6t6 observ6s par Gerloff (1966) et Krasnuk et al (1976) (Willemot 1975;Willemot etal. 1976 (Willemot 1975 Roche et al (1972) et Redshaw et Zalik (1968) (Grenier etal.1972;Willemot etal.…”