Effects of Salt Stress on Photosystem II Efficiency and CO2 Assimilation in Two Syrian Barley Landraces

Kalaji, Hazem M.; Govindjee, .; Bosa, Karolina; Kościelniak, Janusz; Żuk‐Gołaszewska, Krystyna

doi:10.1007/978-3-642-32034-7_164

Cited by 79 publications

(111 citation statements)

References 8 publications

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“…1-B). PI is an indicator of the vitality of photosynthesis [16]. Increasing PI may be associated with the effects of FA on the number of reaction centers per PSII antenna chlorophyll, the maximum quantum yield of primary photochemistry, and the quantum yield of electron transport.…”

Section: Discussionmentioning

confidence: 99%

“…The performance index (PI) parameter (photosynthesis relative vitality), T FM (ms; time taken to reach F m , an indicator of quinone (Q A ), the reduction rate of the PSII acceptor; thus, the rate of PSII electron transport) and Area (the area above the fluorescence induction curve between F o and F m , a measure of the size of the plastoquinine pool in PSII) were also monitored. According to Kalaji et al [16],…”

Section: Chlorophyll a Fluorescence Measurementsmentioning

confidence: 99%

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Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity

et al. 2015

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The ameliorative effect of fulvic acid (0, 300, and 600 mg L −1 ) on photosystem II and antioxidant enzyme activity of the rapeseed (Brassica napus L.) plant under water stress (60, 100, and 140 mm evaporation from class A pan) was studied using split plots in a randomized complete block design with three replications. Results indicated that application of fulvic acid (FA) improved the maximum quantum efficiency of PSII (F v /F m ) and performance index (PI) of plants under both well-watered and limited-water conditions. The time span from F o to F m and the energy necessary for the closure of all reaction centers was significantly increased, but the size of the plastoquinone pool was reduced with increasing water stress levels. Plants treated with FA had higher peroxidase and catalase activities under all irrigation conditions. Activities of ascorbate peroxidase and superoxide dismutase in plants increased with increasing water stress. Malondialdehyde increased under severe water stress, but application of FA significantly decreased lipid peroxidation. Production of reactive oxygen species (ROS) is a common phenomenon in plants under stress. Under this condition, the balance between the production of ROS and the quenching activity of antioxidants is upset, often resulting in oxidative damage. In this study, application of FA significantly increased fluorescence of chlorophyll a, inhibiting ROS production and enhancing antioxidant enzymes activity that destroyed ROS. Thus, ROS in plant cells was reduced under water stress by application of FA and consequently lipid peroxidation was reduced. (http://creativecommons.org/licenses/by-nc-nd/4.0/). Keywords: Brassica napus Fluorescence Antioxidant enzyme Water stress Fulvic acidT H E C R O P J O U R N A L X X ( 2 0 1 5 ) X X X -X X X

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Section: Discussionmentioning

confidence: 99%

Section: Chlorophyll a Fluorescence Measurementsmentioning

confidence: 99%

Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity

et al. 2015

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“…In citrus, salinity stress decreased growth by reducing of net photosynthetic rate, stomatal conductance, performance of PSII, and photosynthetic efficiency (Lòpez-Climent et al 2008). Kalaji et al (2011) reported that salinity stress affects growth of barley by altering chlorophyll fluorescence (PS II) and function of oxygen evolving complex. Furthermore, Mittal et al (2012) observed that salt stress affects growth of Brassica juncea by affecting photosynthetic (PS II) and electron transport rates, and D1 protein.…”

Section: Photosynthetic Pigments and Photosynthesismentioning

confidence: 99%

Effect of salinity stress on plants and its tolerance strategies: a review

Parihar

Singh

et al. 2014

Environ Sci Pollut Res

1,070

596

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The environmental stress is a major area of scientific concern because it constraints plant as well as crop productivity. This situation has been further worsened by anthropogenic activities. Therefore, there is a much scientific saddle on researchers to enhance crop productivity under environmental stress in order to cope with the increasing food demands. The abiotic stresses such as salinity, drought, cold, and heat negatively influence the survival, biomass production and yield of staple food crops. According to an estimate of FAO, over 6% of the world's land is affected by salinity. Thus, salinity stress appears to be a major constraint to plant and crop productivity. Here, we review our understanding of salinity impact on various aspects of plant metabolism and its tolerance strategies in plants.

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“…Translocation of salts from roots to shoots is the product of transpirational flux, and is prerequisite to maintain water level of plants (Flowers and Yeo 1992). Higher accumulations of salt in the cell diminish the photosynthetic efficiency of plants due to inhibition of photosystem II (PSII) activity (Kalaji et al 2011). The PSII has been considered the major site of salinity stressmediated damage to electron transport chain activity (Mehta et al 2010).…”

Section: Direct Effects Of Salinity Stress On Plantsmentioning

confidence: 99%

Roles of osmoprotectants in improving salinity and drought tolerance in plants: a review

Singh

Kumar

Singh

et al. 2015

Rev Environ Sci Biotechnol

545

259

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Abiotic stresses collectively are responsible for crop losses worldwide. Among various abiotic stresses, drought and salinity are the most destructive. Different strategies have been adopted for the management of these stresses. Being complex traits, conventional breeding approaches have shown less success in improving salinity and drought stress tolerance. Roles of compatible solutes in salinity and drought stress tolerance have been studied extensively. At physiological level, osmotic adjustment is an adaptive mechanism involved in drought and/or salinity tolerance and permits the maintenance of turgor pressure under stress conditions. Increasing evidences from series of in vivo and in vitro studies involving physiological, biochemical, genetic, and molecular approaches strongly suggest that osmolytes such as ammonium compounds (polyamines, glycinebetaine, b-alanine betaine, dimethyl-sulfonio propionate and choline-O-sulfate), sugars and sugar alcohols (fructan, trehalose, mannitol, D-ononitol and sorbitol) and amino acids (proline and ectoine) perform important function in adjustment of plants against salinity and drought stresses. Thus, aim of this review is to expose how to osmoprotectants detoxify adverse effect of reactive oxygen species and alleviate drought and salinity stresses. An understanding of the relationship between these two sets of parameters is needed to develop measures for mitigating the damaging impacts of salinity and drought stresses.

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Effects of Salt Stress on Photosystem II Efficiency and CO2 Assimilation in Two Syrian Barley Landraces

Cited by 79 publications

References 8 publications

Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity

Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity

Effect of salinity stress on plants and its tolerance strategies: a review

Roles of osmoprotectants in improving salinity and drought tolerance in plants: a review

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