Burchett, S

Fuller, MP

Niven, S

English

During a 5 degree C and a 5/-1 degree C cold acclimation (CA) regime there was a significant decline in the water potential of winter barley, and a concurrent decline in tissue water content of the 5/-1 degree C CA plants. Results of carbohydrate analysis illustrated a significant (P < 0.001) accumulation of sucrose, fructose and glucose in the 5/-1 degree C CA plants, which was inversely correlated to water potential. Using an infrared imaging radiometer during a convection frost test the water release time (WRT) of 5/-1 degree C CA was demonstrated to be significantly (P < 0.001) longer than that observed in non-cold acclimated plants. This observation is consistent with visual analysis of exotherm curves where the rate of cellular water release to extracellular ice is reduced in the 5/-1 degree C CA plants, compared to the non-cold acclimated plants. These biochemical and physiological changes were correlated to increased plant health following a non-lethal freezing test to -5 degree C, where non-cold acclimated plants produced 2.3 +/- 0.3 tillers and 5 degree C and 5/-1 degree C CA plants produced 2.4 +/- 0.3 and 4.7 +/- 0.7 tillers, respectively. Results from this study imply that cold acclimation leads to changes in the physical state of water that result in a less osmotically responsive cellular environment and subsequently significantly less damage to meristematic tissue

Plymouth Electronic Archive and Research Library

Ichimura Kazuo & Oda Masayuki

in Biological Ice Nucleation and its Applications. (eds) Lee Jr RE,

in Biophysics and biochemistry at low temperatures.

Microbe Adaptations to Cold. Conference.

The effect of cold acclimation on water release time and sip-probe relaxation time in Hordeum vulgare L. Poster number 6, pg

The effect of cold-acclimation on the water relations and freezing tolerance of Hordeum vulgare L

The effect of cold-acclimation on the water relations and freezing tolerance of Hordeum vulgare L

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