ISSN:
1365-3040
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Abstract Flax plants were transferred from 30°C to 15°C temperatures, and then back to 30°C during their vegetative growth phase. Reciprocal transfers were also made from 15°C to 30°C, and then back to 15°C for an identical period at the same time. Plants were also retained in a constant 30°C or 15°C in growth chambers with identical lighting conditions. The reciprocal transfer period lasted 6 d. The relative mobility (Rm) of an anionic leaf peroxidase isozyme, reflecting its molecular weight/conformation and/or net charge, was monitored over a period starting before the reciprocal transfers and finishing after the return to original temperatures. Two of the four flax types which were studied showed isozyme relative mobility responses related either to the different constant temperatures, or to the transfer from 15°C to 30°C. The responses were not reversible on return to the original lower temperature. Thus, exposure to 30°C, even for a transient 6 d period, produced a one way Rm shift. This suggests a developmental switch-over in the particular form of peroxidase glycoprotein being synthesized, rather than an adaptive response triggered by external environmental changes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/1365-3040.ep11602241
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