Chlorophyll a fluorescence as indicative of the salt stress on Brassica napus L.

Bacarin, Marcos Antônio; Deuner, Sidnei; Silva, Fabio Sergio Paulino da; Cassol, Daniela; Silva, Diolina Moura

doi:10.1590/s1677-04202011000400001

Cited by 35 publications

(23 citation statements)

References 23 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The maximum quantum yield of electron transport (ΦE0) was strongly decreased under NaCl stress in rice seedlings as reported earlier in Brassica napus L. (Bacarin et al 2011) and Spirulina platensis (Zhang et al 2010). The increase in the ratio of variable fluorescence in time 0.3 ms to variable fluorescence in time 2 ms (VK/VJ) upon exposure to NaCl stress in rice seedlings indicated that oxygen-evolving complex was affected and thus the electron transport from PSII donor side to PSII reaction center was inhibited as reported earlier by Yan et al (2013) and Kalaji et al (2016).…”

Section: Discussionsupporting

confidence: 72%

Special issue in honour of Prof. Reto J. Strasser - Chlorophyll a fluorescence parameters as indicators of a particular abiotic stress in rice

Faseela¹,

Sinisha²,

Brestič³

et al. 2020

Photosynt.

View full text Add to dashboard Cite

The aim of this study was to evaluate the validity of some chlorophyll (Chl) a fluorescence parameters as early indicators of a particular abiotic stress and also to characterize the effect of different abiotic stresses [high light, NaCl, polyethylene glycol (PEG)-induced osmotic stress, and heavy metals] on the electron transport chain of rice (Oryza sativa L.) seedlings. The results clearly revealed that Chl a fluorescence parameters differ between abiotic stress types and also allowed us to select some parameters which were specifically and intensively affected under different abiotic stresses. We observed that the performance index is a common sensitive parameter to evaluate the effect of above four different abiotic stresses in rice seedlings. Certain Chl a fluorescence parameters were significant for a specific stress. The ratio between the rate constants of photochemical and nonphotochemical deactivation of excited Chl molecules (FV/F0) was prominently decreasing and the maximum quantum yield of nonphotochemical deexcitation was prominently increasing upon exposure to high light stress. The maximum quantum yield of electron transport and the electron transport from PSII donor side to PSII reaction center was highly reduced under NaCl stress in rice seedlings. Moreover, FV/F0 and PSII structure function index were prominently decreasing and the dissipation per cross section was significantly enhancing under PEG stress. The pool size of reduced plastoquinone on the reducing side of PSII [total complementary area between the fluorescence induction curve and maximal chlorophyll fluorescence (FM)], FM, and the probability by which electrons move from PSII to PSI acceptor side were significantly decreasing under heavy metal stress.Additional key words: JIP-test; photosynthesis; plant efficiency analyzer. Abbreviations: 1 -VI -the efficiency/probability with which a PSII trapped electron is transferred to PSI acceptor side; ABS/CS0absorption flux per cross section at t = 0; Area -total complementary area between the fluorescence induction curve and FM; DI0/CS0dissipated energy flux per cross section at t = 0; ET0/CS0 -electron transport flux per cross section at t = 0; FM -maximal chlorophyll fluorescence; F0 -minimal fluorescence; FV -variable fluorescence; FV/F0 -the ratio between the rate constants of photochemical and nonphotochemical deactivation of excited Chl molecules; FV/FM -maximum quantum efficiency of PSII under dark adaptation; PI(abs) -performance index; RC/ABS -fraction of active PSII reaction centers; SFI(abs) -PSII structure-function-index; Tf(max) -time to reach maximal fluorescence; TR0/CS0 -trapped energy flux per cross section at t = 0; VI -the relative variable fluorescence at I-step; VJ -the relative variable fluorescence at J-step; VK/VJ -the ratio of variable fluorescence in time 0.3 ms to variable fluorescence in time 2 ms as an indicator of the PSII donor side limitation; ΦD0 -maximum quantum yield of nonphotochemical deexcitation; ΦE0 -the electron transport quantum yield. Acknowledgem...

show abstract

Section: Discussionsupporting

confidence: 72%

Special issue in honour of Prof. Reto J. Strasser - Chlorophyll a fluorescence parameters as indicators of a particular abiotic stress in rice

Faseela¹,

Sinisha²,

Brestič³

et al. 2020

Photosynt.

View full text Add to dashboard Cite

show abstract

“…It has been used in many studies of salt stress effects in higher plants (e.g. Kalaji et al 2011, Bacarin et al 2011, however only limited number of studies used PI abs as indicator in stress physiology of algae (e.g. Einali et Shariati 2012, Zhou et al 2013) and cyanobacteria (e.g.…”

Section: Resultsmentioning

confidence: 99%

Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient

Vilumbrales¹,

Skácelová²,

Barták³

2013

Czech Polar Rep.

View full text Add to dashboard Cite

In this study, we investigated the effects of salt stress (2 mM NaCl) on excitation energy transfer from light harvesting complexes to photosystem II (PS II) in two Antarctic algal species: Klebsormidium sp. and Zygnema sp. Short-term salt stress led to a significant changes in the shape of chlorophyll fluorescence transient (OJIP). Analyses of the polyphasic fluorescence transients (OJIP) showed that the fluorescence yield at the phases J, I and P declined considerably with the time of exposition to salt stress. In both experimental species, OJIP transients reached lowest values of chlorophyll fluorescence signal after 30/60 min. of NaCl exposition. Then, OJIP shape and chlorophyll fluorescence showed species-specific recovery and rised towards original values (about 2/3 of untreated control). Analyses of chlorophyll fluorescence parameters derived from OJIPs showed that salt stress led to a decrease in the maximal efficiency of PS II photochemistry (F V /F M ) in Zygnema sp. but not Klebsormidium sp. The results indicated that the probability of excitation energy transfer before and beyond Q A , and the yield of electron transport beyond Q A is limited by salt-induced stress in Zygnema sp. In addition, salt stress resulted in a decrease in the photosynthetic electron transport per PS II reaction center, but both increase and decrease in the trapping per PS II reaction center was found. Performace index (PI abs ) was affected negatively in Zygnema sp. but possitively Klebsormidium sp. indicating that the latter species was more resistant to salt stress than Zygnema sp.

show abstract

“…These include physiological traits such as photosynthesis, which are equally important and quite specific in indicating salt tolerance. Chlorophyll fluorescence is now a very powerful noninvasive mean of obtaining quickly semiquantitative information on photosynthesis in the field and in the laboratory (Netondo et al, 2004), using intact leaves still attached to the plants (Netondo et al, 2004;Bacarin et al, 2011;Tavakkoli, et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

NaCl salinity affects germination, growth, physiology, and biochemistry of bambara groundnut

Ambede

Netondo

Mwai

et al. 2012

Braz. J. Plant Physiol.

View full text Add to dashboard Cite

The effects of NaCl salinity on seed germination, growth, physiology, and biochemistry of two bambara groundnut landraces (Vigna subterranea (L.) Verdc), Kakamega (white seed coat) and Mumias (red seed coat), were investigated with the aim of establishing traits, which can provide a basis for breeding to salt tolerance in groundnuts. A study was conducted under laboratorial and greenhouse conditions. Bambara groundnut seeds and plants were subjected to five concentrations of NaCl solutions with several electrical conductivities: 0 (control), 6.96, 12.93, 19.89, and 25.86 dS m -1 . Germination percentage, growth, chlorophyll fluorescence, and leaf chlorophyll content were determined. Sodium chloride salinity (p<0.05) significantly decreased germination and plant growth in both landraces. Mumias had significantly higher total chlorophyll, chlorophyll a and b content compared to Kakamega landrace. Salinity significantly decreased Fv/Fm ratio and electron transport rate in the two landraces, however there were no significant (p>0.05) differences in the Fv/Fm values for Mumias' landrace, as compared to the Control. Overall, Mumias' landrace seeds seemed to be more salt-tolerant at higher salinity levels compared to Kakamega. A greater reduction in growth in Mumias than in Kakamega is a possible indicator for salt tolerance. The chlorophyll fluorescence parameters may not be used to identify salt sensitivity between the two landraces. The results indicated that leaf area and seed germination were suitable parameters for screening the two bambara landraces for salt tolerance.

show abstract

Chlorophyll a fluorescence as indicative of the salt stress on Brassica napus L.

Cited by 35 publications

References 23 publications

Special issue in honour of Prof. Reto J. Strasser - Chlorophyll a fluorescence parameters as indicators of a particular abiotic stress in rice

Special issue in honour of Prof. Reto J. Strasser - Chlorophyll a fluorescence parameters as indicators of a particular abiotic stress in rice

Sensitivity of Antarctic freshwater algae to salt stress assessed by fast chlorophyll fluorescence transient

NaCl salinity affects germination, growth, physiology, and biochemistry of bambara groundnut

Contact Info

Product

Resources

About