Harden the chloroplast to protect the plant
Crosatti Cristina
Harden the chloroplast to protect the plant - Physiologia Plantarum 2013 - 55-63
The chloroplast is the central switch of the plants response to cold and light stress. The ability of many plants species to develop a cold tolerant phenotype is dependebt 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 mrtabolic 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 findingsuggesting that the chloroplast cold acclimation could be the rate limiting factor in the adaptation to low temperature.
1O2
ABA
abscisic acid
COld Regulated
COR
hexagonal II
HIII
lethal temperature 50 (temperature that leads to death of 50
LHCB light harvesting complex of PSII
LT50
Mg-ProtoIX
Mg-protoporphyrinIX
of the individuals)
photosystem I
photosystem II
PSI
PSII
reactive oxygen species
ROS
singlet oxygen
Harden the chloroplast to protect the plant - Physiologia Plantarum 2013 - 55-63
The chloroplast is the central switch of the plants response to cold and light stress. The ability of many plants species to develop a cold tolerant phenotype is dependebt 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 mrtabolic 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 findingsuggesting that the chloroplast cold acclimation could be the rate limiting factor in the adaptation to low temperature.
1O2
ABA
abscisic acid
COld Regulated
COR
hexagonal II
HIII
lethal temperature 50 (temperature that leads to death of 50
LHCB light harvesting complex of PSII
LT50
Mg-ProtoIX
Mg-protoporphyrinIX
of the individuals)
photosystem I
photosystem II
PSI
PSII
reactive oxygen species
ROS
singlet oxygen