Physiological and biochemical responses to high light and temperature stress in plants

被引:227
作者
Szymanska, Renata [1 ]
Slesak, Ireneusz [2 ]
Orzechowska, Aleksandra [1 ]
Kruk, Jerzy [3 ]
机构
[1] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Med Phys & Biophys, Reymonta 19, PL-30059 Krakow, Poland
[2] Polish Acad Sci, Franciszek Gorski Inst Plant Physiol, Ul Niezapominajek 21, PL-30239 Krakow, Poland
[3] Jagiellonian Univ, Fac Biochem Biophys & Biotechnol, Dept Plant Physiol & Biochem, Gronostajowa 7, PL-30387 Krakow, Poland
关键词
CYCLIC ELECTRON FLOW; CYTOSOLIC ASCORBATE PEROXIDASE; SINGLET OXYGEN QUENCHERS; INDUCED OXIDATIVE STRESS; WATER-WATER CYCLE; PHOTOSYSTEM-II; ARABIDOPSIS-THALIANA; HEAT-STRESS; PHOTOOXIDATIVE STRESS; REDOX STATE;
D O I
10.1016/j.envexpbot.2017.05.002
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Light intensity and temperature are primary environmental factors affecting the growth and development of plants. Changes in their intensity, range and duration can lead to acclimatory responses, cellular damage and ultimately to the death of plants. Plants have evolved several efficient protective mechanisms that make it possible for them to survive under unfavorable light and temperature conditions. These mechanisms are linked predominantly to the photosynthetic electron transport chain, xanthophyll cycle and the photorespiratory pathway. Under stress conditions, elevated levels of reactive oxygen species (ROS) are produced, which in addition to deleterious effects also show signalling functions. In response to enhanced ROS formation, different low-molecular antioxidants are synthesized, as well as antioxidant enzymes. Depending on the stress intensity and its duration, the content of synthesized antioxidants varies. Under severe, short light/temperature stress, the contents of low-molecular weight antioxidants, such as ascorbate, glutathione and prenyllipids, tend to decrease, which is correlated with an extra need for ROS scavenging. Under longer exposure of plants to unfavorable light and temperature conditions, the contents of antioxidants gradually increase as a result of acclimation during long-term responses. Studies on plant antioxidant responses indicate that a crucial part of the antioxidant network operates in chloroplasts and their action shows a high level of interdependence. The antioxidant response also depends on plant stress-tolerance, and frequently varies for different species. Therefore studying a wide range of plant species is a fruitful approach to investigating the natural variation in the antioxidant response of plants in relation to excess light and temperature.
引用
收藏
页码:165 / 177
页数:13
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