Rapid increase in deep supercooling of xylem parenchyma.
Plant Physiol
; 69(3): 697-700, 1982 Mar.
Article
in En
| MEDLINE
| ID: mdl-16662278
ABSTRACT
Malus pumila Mill. twigs were collected from September through December and stored at 5 degrees C until the low temperature exotherms of the xylem were determined by differential thermal analysis. During the differential thermal analysis, cooling was interrupted, and temperatures of 5 to -18 degrees C were held for 0.4 to 10 hours before cooling to -50 degrees C was resumed. Control twigs were cooled to -50 degrees C without interruption. Holding the twigs at 1.3 to -5 degrees C shifted the start of the low temperature exotherm from about -20 to -30 degrees C. Slightly higher (2.6 degrees C) and lower (-10 degrees C) temperatures were occasionally effective. The shift began within 20 to 30 minutes and increased progressively to 150 minutes. The acclimation was reversibly inhibited by N(2) atmosphere.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Plant Physiol
Year:
1982
Type:
Article