Can chlorophyll-a fluorescence parameters be used as bio-indicators to distinguish between drought and salinity stress in Tilia cordata Mill?

Kalaji, Hazem M.; Račková, Lydia; Paganová, Viera; Swoczyna, Tatiana; Rusinowski, Szymon; Sitko, Krzysztof

doi:10.1016/j.envexpbot.2017.11.001

Cited by 169 publications

(161 citation statements)

References 36 publications

Supporting

Mentioning

149

Contrasting

Order By: Relevance

“…The measurement of chlorophyll fluorescence is another standard technique for drought studies. Chlorophyll a fluorescence transient is an important method for studying photosystem II (PSII) function and reaction under drought [15,16], and can be used to analyze light absorption and its conversion to biochemical energy [17,18]. Drought might lead to excessive generation of reactive oxygen species (ROS), which can cause oxidative damage to photosynthetic components [19].…”

mentioning

confidence: 99%

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

et al. 2020

View full text Add to dashboard Cite

The drought tolerance and capacity to recover after drought are important for plant growth and yield. In this study, two maize lines with different drought resistance were used to investigate the effects of different drought durations and subsequent re-watering on photosynthetic capacity, electron transfer and energy distribution, and antioxidative defense mechanisms of maize. Under short drought, maize plants decreased stomatal conductance and photosynthetic electron transport rate, and increased NPQ (Non-photochemical quenching) to dissipate excess excitation energy in time and protect the photosynthetic apparatus. With the increased drought duration, NPQ, antioxidase activity, PItotal (total performance index), ∆I/Io, ψEo (quantum yield for electron transport), φEo (efficiency/probability that an electron moves further than QA−), δRo (efficiency/probability with which an electron from the intersystem electron carriers is transferred to reduce end electron acceptors at the PSI acceptor side) and φRo (the quantum yield for the reduction of the end electron acceptors at the PSI acceptor side) were significantly reduced, while Y(NO) (quantum yield of nonregulated energy dissipation) and MDA (malondialdehyde) began to quickly increase. The photosynthetic rate and capacity of photosynthetic electron transport could not recover to the level of the plants subjected to normal water status after re-watering. These findings indicated that long drought damaged the PSI (photosystem I) and PSII (photosystem II) reaction center and decreased the electron transfer efficiency, and this damage could not be recovered by re-watering. Different drought resistance and recovery levels of photosynthetic performance were achieved by different maize lines. Compared with D340, D1798Z had higher NPQ and antioxidase activity, which was able to maintain functionality for longer in response to progressive drought, and it could also recover at more severe drought after re-watering, which indicated its higher tolerance to drought. It was concluded that the capacity of the energy dissipation and antioxidant enzyme system is crucial to mitigate the effects caused by drought, and the capacity to recover after re-watering was dependent on the severity and persistence of drought, adaptability, and recovery differences of the maize lines. The results provide a profound insight to understand the maize functional traits’ responses to drought stresses and re-watering.

show abstract

mentioning

confidence: 99%

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Fast chlorophyll a kinetic analysis OJIP test was used to assess the structural and functional ability of photosystem-II (PSII) in plants under normal or stress conditions (Kalaji et al, 2018). In the present study, quantum yield of PSII measured as Fv/Fm remained same due to salt stress in all canola cultivars (Data not shown) but it decreased Fv/Fo (quantum efficiency of PSII).…”

Section: Discussionmentioning

confidence: 47%

“…In the present study, quantum yield of PSII measured as Fv/Fm remained same due to salt stress in all canola cultivars (Data not shown) but it decreased Fv/Fo (quantum efficiency of PSII). It is suggested that quantum efficiency of PSII measured as Fv/Fo is more sensitive to salt stress than Fv/Fm and more reliable (Baker, 2008;Oukarroum et al, 2015;Kalaji et al, 2018). Further PSII activity can be analyzed by accessing relative variable fluorescence at different steps.…”

Section: Discussionmentioning

confidence: 99%

Leaf proteome analysis signified that photosynthesis and antioxidants are key indicators of salinity tolerance in canola (Brassica napus L.)

Iqbal¹,

Athar

Ibrahim

et al. 2019

PAK.J.BOT.

View full text Add to dashboard Cite

Growth and yield reduction in different crops including canola is predicted to rise due to salinity stress in coming years. Understanding responses to salt stress will help in selecting and breeding salt tolerant canola cultivars. Physiological and leaf proteomic responses of 13 cultivars of canola were investigated under salt stress. In a pot experiment, three-week-old plants were grown under normal or salt stress (150 mM NaCl) for further two weeks. Out of 13 canola cultivars, cvs DGL, Dunkled, Faisal Canola and Punjab Canola were categorized as salinity stress tolerant cultivars, while cvs Bulbul-98, Oscar, Legend and Cyclone were considered as salt sensitive. Wide genotypic variations in canola cultivars have been observed in accumulation of potassium and sodium ions in the leaves and roots. Salt tolerant cultivars accumulated low Na + in their leaves than in in roots indicating limited uptake of Na + at root level with subsequent its transport to shoot. Moreover, salt tolerant cultivars had greater Na + discriminating capacity against K + . Salt tolerant cultivars were higher in leaf relative water content. Although Fv/Fm did not change in canola cultivars due to salt stress, Fv/Fo and PIABS decreased considerably in all cultivars indicating important indicators of salt stress. Salt stress increased Vj, VI, ABS/RC, TRo/RC and DIo/RC but it decreased ETo/RC which indicated that salt stress damaged the donor end of PSII (oxygen evolving complex) and reaction centers. Such adverse effects were maximal in salt sensitive cultivar Legend while minimal effects were observed in salt tolerant canola cultivars Faisal Canola, DGL and Dunkled. From comparative proteome analysis, it is obvious that 18 differentially expressed proteins in canola cultivars are mainly related with antioxidative defense system, photosynthesis and gene regulation. In addition, expression of these proteins was greater in salt tolerant cultivars. Cellular enegetics related proteins were downregulated particularly in salt sensitive cultivars due to salt stress. It is concluded that antioxidative defence system and photosynthesis are major componens of salt tolerance in canola in addition to salt exclusion. In addition, physiological studies complemented with proteomics will help in understanding detailed mechanism of salt tolerance.

show abstract

“…Among physiological responses, photosynthesis-related characteristics are suggested as being extremely sensitive to suboptimal conditions, reflecting overall physiological state of plants (Baker, 2006). Chlorophyll a fluorescence-related parameters are frequently used for early prediction of unfavourable physiological changes (Kan et al, 2017;Kalaji et al, 2018). In particular, chlorophyll a fluorescence measurements have been used in heavy metal studies (Han et al, 2013;Sghaier et al, 2015;Anjum et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Physiological Responses of Wetland Species Rumex Hydrolapathum to Increased Concentration of Biogenous Heavy Metals Zn and Mn in Substrate

Ievinsh

Dišlere

Karlsons

et al. 2020

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

View full text Add to dashboard Cite

Communicated by Mâris KïaviòðThe aim of the present study was to determine if individuals of Rumex hydrolapathum Huds native to saline wetlands are able to tolerate high concentration of biogenous heavy metals Zn and Mn in substrate and to accumulate high concentration of these metals in aboveground parts. Plant physiological status was monitored by using non-destructive analysis of chlorophyll and chlorophyll a fluorescence. R. hydrolapathum plants accumulated up to 1840 mg·kg -1 Zn and 6400 mg·kg -1 Mn in older leaves. The usefulness of monitoring changes in chlorophyll concentration and chlorophyll a fluorescence parameters to predict physiological response of R. hydrolapathum plants to excess Zn and Mn was not supported, as the lack of significant changes indicated that the model species showed adaptation to increased amount of metals in actively photosynthesizing tissues. It appears that Zn and Mn tolerance of R. hydrolapathum is based primarily at the physiological level where metal accumulation in younger leaves and roots is restricted, and development of new leaves is promoted together with induction of senescence in older leaves that have accumulated the majority of Zn and Mn. R. hydrolapathum can be characterised as a very promising model species for further studies for practical phytoremediation needs.

show abstract

Can chlorophyll-a fluorescence parameters be used as bio-indicators to distinguish between drought and salinity stress in Tilia cordata Mill?

Cited by 169 publications

References 36 publications

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

Leaf proteome analysis signified that photosynthesis and antioxidants are key indicators of salinity tolerance in canola (Brassica napus L.)

Physiological Responses of Wetland Species Rumex Hydrolapathum to Increased Concentration of Biogenous Heavy Metals Zn and Mn in Substrate

Contact Info

Product

Resources

About