Photosynthetic Responses Under Harmful and Changing Environment: Practical Aspects in Crop Research

Živčák, Marek; Olšovská, Katarína; Brestič, Marián

doi:10.1007/978-3-319-48873-8_10

Cited by 14 publications

(11 citation statements)

References 349 publications

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“…These adaptations allow the plants to flourish even under rapidly changing climatic conditions, despite the inhibition of their photosynthetic processes. Therefore, the environment is often perceived as a complex factor that modulates or limits crop growth and production processes (Sharkey 2005, Yeh et al 2012, Zivcak et al 2017. Increasing the drought and high-temperature tolerance of crops is one of the critical challenges facing plant research and breeding practices.…”

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confidence: 99%

“…However, despite the regulatory processes, plant tissues become dehydrated, which leads to a reduction in plant performance, including effects observed at the level of photosynthetic electron transport and PSII photochemistry that can be well assessed using chlorophyll fluorescence techniques (Brestič and Živčák 2013). Several authors have suggested that chlorophyll fluorescence can be more efficiently used as a suitable selection criterion for genotype screening and as an indicator of the effects of climate change on crop species (Sharma et al 2012, Kalaji et al 2014, Zivcak et al 2017.…”

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confidence: 99%

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Sensitivity of fast chlorophyll fluorescence parameters to combined heat and drought stress in wheat genotypes

Barboričová¹,

Filaček²,

Vysoká³

et al. 2022

Plant Soil Environ.

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This study aimed to characterise the specific phenotypic responses and the sensitivity of photosynthetic parameters to progressive drought in modern wheat genotypes. In pot experiments, we tested eight wheat genotypes (Triticum sp.) that differed in ploidy level and country of origin. Water stress was simulated by the restriction of irrigation, which led to a decreased leaf relative water content of up to 70%. During gradual dehydration, changes in the structure and function of photosystem II (PSII) were analysed using the fluorescence parameters derived from fast fluorescence kinetics (OJIP transient). The results indicated that a group of JIP test-based parameters demonstrated sensitivity to drought, including genotype-specific responses. Severe drought stress led to a decrease in the photochemical efficiency of PSII (Fv/Fm), a reduction in the number of active PSII reaction centers (RC/ABS) and a decrease in parameters, indicating overall photochemical performance at the PSII level (performance indices PIabs and PItot). These findings demonstrate that the approaches used in our experiments were useful and reliable in monitoring the physiological responses of individual varieties of wheat exposed to stress conditions, and they have application potential as selection criteria in crop breeding. The contribution of the high-temperature effects on the photochemical responses under water deficit conditions is also discussed.

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confidence: 99%

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Sensitivity of fast chlorophyll fluorescence parameters to combined heat and drought stress in wheat genotypes

Barboričová¹,

Filaček²,

Vysoká³

et al. 2022

Plant Soil Environ.

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“…Concerning chlorophyll fluorescence, the Qy depicts the efficiency of PSII photochemistry ( Zivcak, Olsovska & Marian, 2017 ) and found that the maximum Qy dark was relatively smaller (0.47) value depending on temperature (25 to 30 °C). Our findings were slightly higher than the previous study as for Qy light and Qy dark remained above 0.67 and 0.70 respectively.…”

Section: Discussionmentioning

confidence: 99%

Will future maize improvement programs leverage the canopy light-interception, photosynthetic, and biomass capacities of traditional accessions?

Mubarak¹,

Mohammathu²,

Kumara³

2023

PeerJ

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Maize germplasm has greater latent potential to address the global food and feed crisis because of its high radiation, water and nutrient efficiencies. Photosynthetic and canopy architectural traits in maize are important in determining yield. The present study aimed to screen a subset of local maize accessions in Sri Lanka to evaluate their photosynthetic, biomass and yield related traits and to identify resource efficient germplasm. Experiments were carried out in the Ampara district of Sri Lanka. Eight maize accessions viz; SEU2, SEU6, SEU9, SEU10, SEU14, SEU15, SEU17 and SEU17 and two elite F1 cultivars (cv. Pacific-999 and cv. Bhadra) were analyzed under field conditions. Our results showed that maize genotypes produced a lower leaf area index (LAI) at the third and tenth week after field planting (WAP). However, the LAI was significantly increased in six WAP by Pacific-999, SEU2, SEU9, and SEU15. A similar trend was observed for percentage of light interception at three WAP (47%), six WAP (>64%), and decreased at 10 WAP. In addition, LAI maximum values were between 3.0 and 3.5, allowing 80% of the incident light to be intercepted by maize canopies. The estimated light extinction coefficient (k) remained lower (<0.5), suggesting that maize leaves are eractophilic canopies. Although fractional interception (f) varies, SEU2 and SEU9 had the highest values (0.57), and quantum yields of PSII (>0.73) in dark-adapted leaves. In addition, Pacific-999, SEU2, SEU9, and SEU17 had significantly higher rates of photosynthesis with minimal stomatal conductance and transpiration rates. As a result, they outperformed the control plants in terms of biomass, cob weight and grain yield. This suggests that native maize germplasm could be introduced as novel, less resource-intensive cultivars to sustain global food security.

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“…The most described effect of HS in plants and, also, in many other marine organisms is the decrease in the fluorescence Fm and a concomitant increase in fluorescence F0; this shows the appearance of a peak at 300 µs, which is termed as the K-step (Guisse et al, 1995;Mareckova et al, 2019;Kviderova and Kumar, 2020). The K-step is difficult to discern in the typical OJIP curve (Zivcak et al, 2017); the plot of relative variable fluorescence W = Vt/VJ at 300 µs identified the possible K-step in the plants in our study as affected by HS.…”

Section: K-stepmentioning

confidence: 99%

High-resolution dissection of photosystem II electron transport reveals differential response to water deficit and heat stress in isolation and combination in pearl millet [Pennisetum glaucum (L.) R. Br.]

et al. 2022

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Heat and Water Deficit Stress (WDS) tend to impede and restrict the efficiency of photosynthesis, chlorophyll fluorescence, and maximum photochemical quantum yield in plants based on their characteristic ability to interfere with the electron transport system in photosystem II. Dissection of the electron transport pathway in Photosystem II (PSII) under water deficit and Heat Stress (HS) can be insightful in gaining knowledge on the various attributes of the photosynthetic performance of a plant. We attempt a high-resolution dissection of electron transport in PSII with studies on chlorophyll a fast fluorescence kinetics and non-photochemical quenching (NPQ) as a response to and recovery from these stresses in pearl millet [Pennisetum glaucum (L.) R. Br.] in isolation and combination. In this study, we bring out the mechanisms by which both heat and water stress, in isolation and in combination, affect the photosynthetic electron transport in Photosystem II. Our results indicate that oxygen evolution complex (OEC) damage is the primary effect of heat stress and is not seen with the same intensity in the water-stressed plants. Low exciton absorption flux in heat stress and combined stress was seen due to OEC damage, and this caused an electron transport traffic jam in the donor side of PS II. Both the specific energy flux model and the phenomenological flux model developed from the derived values in our study show that water deficit stress in combination with heat stress has a much stronger effect than the stresses in isolation on the overall electron transport pathway of the PS II in pearl millet plants.

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Photosynthetic Responses Under Harmful and Changing Environment: Practical Aspects in Crop Research

Cited by 14 publications

References 349 publications

Sensitivity of fast chlorophyll fluorescence parameters to combined heat and drought stress in wheat genotypes

Sensitivity of fast chlorophyll fluorescence parameters to combined heat and drought stress in wheat genotypes

Will future maize improvement programs leverage the canopy light-interception, photosynthetic, and biomass capacities of traditional accessions?

High-resolution dissection of photosystem II electron transport reveals differential response to water deficit and heat stress in isolation and combination in pearl millet [Pennisetum glaucum (L.) R. Br.]

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