Journal
PHYSIOLOGIA PLANTARUM
Volume 147, Issue 1, Pages 55-63Publisher
WILEY
DOI: 10.1111/j.1399-3054.2012.01689.x
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Funding
- Progetto Strategico MIPAF 'OLEA - Genomica e Miglioramento genetico dell'olivo' [D.M. 27011/7643/10]
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The chloroplast is the central switch of the plant's response to cold and light stress. The ability of many plant species to develop a cold tolerant phenotype is dependent on the presence of light and photosynthetic activity during low-temperature growth. Light exposure at low temperature stimulates an over-reduction of the plastoquinone pool as well as the accumulation of reactive oxygen species, and both metabolic conditions generate a retrograde signal controlling nuclear gene expression. At the same time the chloroplast is the target of many cold acclimation processes which are the results of the chloroplast-nucleus cross-talk. Often, the extent of cold acclimation of the chloroplast is tightly correlated with the overall plant tolerance to chilling and freezing temperatures, a finding suggesting that the chloroplast cold acclimation could be the rate limiting factor in the adaptation to low temperature.
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