Characterization of PSII photochemistry and thermostability in salt-treated Rumex leaves

Chen, Huaxin; Li, Weijun; Shazhou, An; Gao, Huiyuan

doi:10.1078/0176-1617-01231

Cited by 69 publications

(45 citation statements)

References 39 publications

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“…Changes in the F O and F M parameters led to a reduced F V /F M ratio ( Figure 1C), but this decline was only significantly important under the highest salt concentration in Dinçer and Remzibey-05 leaves. For the other salt applications, the alterations of F V / F M parameters were not found significant, and these results indicated no damage to the donor side or acceptor side of PSII (Chen et al, 2004) and optimal functionality of PSII . Our results showed that decreased values of F V /F M exhibited a correlation with ΦPSII, F′ V /F′ M , and ETR ( Figures 1D, 2A, and 2B).…”

Section: Cultivarsmentioning

confidence: 85%

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Erdal¹,

Çakirlar²

2014

Turk J Biol

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This study was conducted to determine the tolerance of safflower (Carthamus tinctorius L.) cultivars (Dinçer, Remzibey-05, and Yenice) against salt stress based on some physiological and biochemical parameters at the vegetative stage. Eighteen-day-old plants were subjected to salt stress [0 (control), 75, 150, 225, and 300 mM NaCl concentrations] for 12 days, which led to a significant decrease in growth parameters (stem growth, fresh weight, and relative water content) and the photosynthetic pigment contents of the safflower cultivars. The photochemical activities of photosystem II of the cultivars were negatively affected by salinity, especially at the highest concentration (300 mM). Salt stress decreased K + content and K + /Na + ratio while it increased Na + content. Malondialdehyde and free proline contents in the leaves of cultivars increased gradually in proportion to the increase of NaCl concentration. Analysis of antioxidant enzyme activities showed that these enzymes responded differently to the NaCl concentrations. Dinçer, with higher antioxidant enzyme activities, had a more effective response than the other cultivars. Considering growth and biochemical and chlorophyll fluorescence parameters with the endogenous defense system, Dinçer had a higher withstanding capacity against salinity than the other cultivars.

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Section: Cultivarsmentioning

confidence: 85%

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Erdal¹,

Çakirlar²

2014

Turk J Biol

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“…So far, great efforts have been made to figure out PSII responses to salt stress, however, inconsistent results were obtained. PSII function was proved to be inhibited by salt stress in some studies (Belkhodja et al 1994;Everard et al 1994;Netondo et al 2004;Benzarti et al 2012), whereas high resistance of PSII to salt stress was demonstrated in other studies (Morales et al 1992;Lu et al 2002Lu et al , 2003aChen et al 2004;Tarchoune et al 2012). Different plant species used in these studies may be one of the reasons leading to the inconsistent results.…”

Section: Plant Biomass and Photosynthesismentioning

confidence: 98%

Physiological adaptive mechanisms of plants grown in saline soil and implications for sustainable saline agriculture in coastal zone

et al. 2013

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There is large area of saline abandoned and lowyielding land distributed in coastal zone in the world. Soil salinity which inhibits plant growth and decreases crop yield is a serious and chronic problem for agricultural production. Improving plant salt tolerance is a feasible way to solve this problem. Plant physiological and biochemical responses under salinity stress become a hot issue at present, because it can provide insights into how plants may be modified to become more tolerant. It is generally known that the negative effects of soil salinity on plants are ascribed to ion toxicity, oxidative stress and osmotic stress, and great progress has been made in the study on molecular and physiological mechanisms of plant salinity tolerance in recent years. However, the present knowledge is not easily applied in the agronomy research under field environment. In this review, we simplified the physiological adaptive mechanisms in plants grown in saline soil and put forward a practical procedure for discerning physiological status and responses. In our opinion, this procedure consists of two steps. First, negative effects of salt stress are evaluated by the changes in biomass, crop yield and photosynthesis. Second, the underlying reasons are analyzed from osmotic regulation, antioxidant response and ion homeostasis. Photosynthesis is a good indicator of the harmful effects of saline soil on plants because of its close relation with crop yield and high sensitivity to environmental stress. Particularly, chlorophyll a fluorescence transient has been accepted as a reliable, sensitive and convenient tool in photosynthesis research in recent years, and it can facilitate and enrich photosynthetic research under field environment.

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“…The correlation curve of Pn related to Ci was established. CE was calculated from the linear portion of the Pn-Ci curve according to Chen et al (2004).…”

Section: Plant Materialsmentioning

confidence: 99%

Photosynthetic characterization of Jerusalem artichoke during leaf expansion

Chen

Shao

et al. 2011

Acta Physiol Plant

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Gas exchange, chlorophyll a fluorescence and modulated 820 nm reflection were investigated to explore the development of photosynthesis in Jerusalem artichoke (Helianthus tuberosus L.) leaves from initiation to full expansion. During leaf expansion, photosynthetic rate (Pn) increased and reached the maximal level when leaves were fully expanded. The same change pattern was also found in the stomatal conductance and chlorophyll content. Lower Pn could not be ascribed to the higher stomatal resistance in developing leaves, as intercellular CO 2 concentration was not significantly lower in these leaves. Lower Pn partly resulted from the lower actual photochemical efficiency of PSII in developing leaves, as more excited energy was dissipated through non-photochemical quenching. The development of primary photochemical reaction and electron transport in the donor side of PSII was completed in the initiating leaves. However, the development of electron transport in the acceptor side of PSII was not accomplished until leaves were fully expanded, indicated by the change in probability that an electron moves further than primary quinone (wo). PSI activity changed in parallel with wo suggesting that PSI cooperated well with PSII during leaf expansion. It should be stressed that the development of carbon fixation process was later than primary photochemical reaction but earlier than photosynthetic electron transport during leaf expansion. The later development of photosynthetic electron transport may reduce the production of reactive oxygen species from Mehler reaction, particularly under low carbon fixation.

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Characterization of PSII photochemistry and thermostability in salt-treated Rumex leaves

Cited by 69 publications

References 39 publications

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Physiological adaptive mechanisms of plants grown in saline soil and implications for sustainable saline agriculture in coastal zone

Photosynthetic characterization of Jerusalem artichoke during leaf expansion

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