Chlorophyll Fluorescence Parameters: The Definitions, Photosynthetic Meaning, and Mutual Relationships

Roháček, Karel

doi:10.1023/a:1020125719386

Cited by 608 publications

(260 citation statements)

References 58 publications

Supporting

Mentioning

237

Contrasting

Unclassified

Order By: Relevance

“…The use of this direct, non-destructive, highly sensitive, and reliable technique has provided a greater understanding photosynthetic process (Rohácek, 2002). This technique allows the study of characteristics related to the absorption and transfer of light energy in the electron transport chain in chloroplast (Krause & Weis, 1991).…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll Fluorescence Transient Analysis in Alternanthera tenella Colla Plants Grown in Nutrient Solution with Different Concentrations of Copper

Cuchiara¹,

Silva²,

Martinazzo³

et al. 2013

JAS

View full text Add to dashboard Cite

This study evaluates the chlorophyll index and fluorescence parameters of chlorophyll a in Alternanthera tenella grown in different concentrations of copper (Cu). The A. tenella plants were hydroponically grown in a complete nutrient solution for 3 days and were then transferred to the same solution containing different copper concentrations [0.041, 0.082 (control), 0.164, 0.246, and 0.328 mM]. The plants were maintained in these solutions for 13 days. The nutrient solutions were replaced every 3 days, and the plants were evaluated at 6 days and 13 days after the start of the treatment. An increase in the chlorophyll index was observed at copper concentrations of 0.164, 0.246, and 0.328 mM on days 6 and 13. These concentrations of copper also affected the fluorescence parameters and caused a reduction in the pool of the final photosystem I (PSI) electron acceptors, a decrease in the total number of electron carriers per reaction centre, a decrease in the parameters related to the flow, yield, and efficiency for the reduction of the final PSI acceptor, and a decline of the total photosynthetic performance index. Therefore, high doses of copper affect the functionality of the PSI, decreasing the reduction flow of the final PSI electron acceptors.

show abstract

Section: Introductionmentioning

confidence: 99%

Chlorophyll Fluorescence Transient Analysis in Alternanthera tenella Colla Plants Grown in Nutrient Solution with Different Concentrations of Copper

Cuchiara¹,

Silva²,

Martinazzo³

et al. 2013

JAS

View full text Add to dashboard Cite

show abstract

“…This may be associated with increased heat sinks (heat sink centers or silent centers), which may absorb light in a similar manner as that of active reaction centers, but are unable to store the excitation energy as redox energy and dissipate their total energy as heat (Hermans et al, 2003). The Fv/Fm ratio is frequently used as an indicator of the photoinhibitor or other injury caused to the PSII complexes (Rohacek, 2002). The higher Fv/Fm in late maturing cultivar ('SC704') ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Field performance of maize (Zea mays L.) cultivars under drought stress

Ghassemi‐Golezani

Heydari

Dalil

2018

AAS

View full text Add to dashboard Cite

This research was carried out in 2014 at the Research Farm of the University of Tabriz, Iran. The experiment was arranged as split plot on the basis of randomized complete block with three replicates to assess the effects of four irrigation intervals (irrigations after 60, 80, 100 and 120 mm evaporation) on physiological and agronomical traits of three cultivars of maize (Zea mays L.; 'SC704', 'NS640', 'DC303': late, mid and early maturing, respectively). Irrigation intervals and maize cultivars were assigned to the main and sub-plots, respectively. Leaf temperature of all maize cultivars significantly increased, but chlorophyll content index, maximum efficiency of photosystem II, number of grains per plant, 1000 grain mass, plant biomass, grain yield and harvest index significantly decreased with increasing irrigation intervals. Late maturing cultivar ('SC704') was superior in all studied traits, followed by mid ('NS640') and early ('DC303') maturing cultivars. It was concluded that water limitation can potentially reduce performance of maize cultivars in the field, but the extent of this reduction depends on genotype and severity of stress.Key words: chlorophyll content; leaf temperature; maize; photosystem II; drought stress IZVLEČEK USPEVANJE SORT KORUZE (Zea mays L.) V RAZMERAH SUŠNEGA STRESARaziskava je bila opravljena v sezoni 2014 na Research Farm of the University of Tabriz, Iran. Poskus je bil zasnovan kot poskus z deljenkami na osnovi popolnega naključnega bločnega poskusa s tremi ponovitvami za ovrednotenje učinkov štirih načinov namakanja (namakanje po 60, 80, 100 in 120 mm evaporacije) na osnovi fizioloških in agronomskih lastnosti treh sort koruze (Zea mays L.; 'SC704', 'NS640', 'DC303': zgodnje, srednje in pozno dozorevajoča sorta). Načini namakanja so bili vrednoteni na glavnih ploskvah, sorte koruze na podploskvah. Temperatura lista je pri vseh sortah značilno naraščala z večanjem intervala namakanja, lastnosti kot so indeks vsebnosti klorofila, maksimalna učinkovitost fotosistema II, število zrn na rastlino, masa 1000 zrn, biomasa rastlin, pridelek zrnja in žetveni indeks pa so se z večanjem intervala namakanja značilno zmanjšale. Pozno dozorevajoča sorta ('SC704') je bila v vseh preučevanih lastnostih najboljša, sledili sta ji srednje ('NS640') in zgodaj ('DC303') dozorevajoči sorti. Ugotovljeno je bilo, da pomanjkanje vode lahko potencialno zmanjša uspevanje koruze, a je obseg zmanjšanja odvisen od genotipa in jakosti stresa.

show abstract

“…Numerous articles provide the efficiency of several Chl-α-fluorescence parameters that have been employed in assessing the effects of toxicants or their combinations on microalgae and macroalgae (seaweeds). Detailed definitions of certain Chl-α-fluorescence parameters along with their photosynthetic importance are available in the literature [16,[20][21][22]. The most commonly used Chl-α-fluorescence key parameters that are becoming recognized as valid sublethal indicators of photosystem stress and have been used to examine the sub-lethal toxicity of toxicants toward a variety of microalgae are maximum quantum yield (F v /F m ), effective PSII quantum yield (Φ PSII, or Φ m or ΔF/F m' ), operational PSII quantum yield (Φ' PSII or Φ' m ), proportion of open PSII (qP), non-photochemical quenching (NPQ), and electron transport rate (ETR) [2,[23][24][25][26].…”

Section: Methodsologies Of Algal Photosynthesis Inhibition Testsmentioning

confidence: 99%

“…Based on information presented in the same bibliographic review of Lewis et al on toxicity of oils, dispersants (mixtures of emulsifiers and solvents that break an oil slick into smaller droplets of oil), and dispersed oils toward algae and aquatic plants, 22 species of freshwater and 63 species of saltwater algae have been exposed to more oils (21) and dispersants (27) than any other type of aquatic plant [32]. This numeric example shows that even though damage may occur from low-level continuous discharges to both freshwater and saltwater environments, however, the environmental effects of large oil spills to marine waters have received the most attention by the public and regulatory and scientific communities resulting in the imbalance of entries in toxicity databases.…”

Section: Oils Dispersants and Dispersed Oilsmentioning

confidence: 99%

Effects on the Photosynthetic Activity of Algae after Exposure to Various Organic and Inorganic Pollutants: Review

Petsas¹,

Vagi²

2017

Chlorophyll

View full text Add to dashboard Cite

Algal studies remain necessary for risk assessment and their utility in ecotoxicology is the evaluation of lethal and sub-lethal toxic effects of potential toxicants on inhabitants of several ecosystems. Effects on algal photosynthetic apparatus caused by various chemical species have been extensively studied. The present chapter summarizes the published data concerning the toxicity of various organic and inorganic pollutants such as oils, pesticides, antifoulants and metals on photosynthesis of aquatic primary producers. Biochemical mode of action resulting in the disruption of photosynthesis depends on the chemical's nature and the characteristics of the exposed microorganism. Observed differences in response and sensitivity by different species to the same toxicant were attributed to several algal characteristics including photosynthetic capacity, pigment type, cellular lipid and protein content, and cell size. Single species bioassays either for one chemical alone or in mixture have been well reported and tolerance of both marine and freshwater water-column phytoplaktonic species has been examined. Adequate published information on multispecies tests (communities) in laboratory and field studies exists. However, risk assessment on photosynthesis of microbenthic periphyton is inadequate, though it is essential especially for hydrophobic organic molecules. Further studies are required to evaluate the adverse effects of metabolites on aquatic microalgae.

show abstract

Chlorophyll Fluorescence Parameters: The Definitions, Photosynthetic Meaning, and Mutual Relationships

Cited by 608 publications

References 58 publications

Chlorophyll Fluorescence Transient Analysis in Alternanthera tenella Colla Plants Grown in Nutrient Solution with Different Concentrations of Copper

Chlorophyll Fluorescence Transient Analysis in Alternanthera tenella Colla Plants Grown in Nutrient Solution with Different Concentrations of Copper

Field performance of maize (Zea mays L.) cultivars under drought stress

Effects on the Photosynthetic Activity of Algae after Exposure to Various Organic and Inorganic Pollutants: Review

Contact Info

Product

Resources

About