The different patterns of post-heat stress responses in wheat genotypes: the role of the transthylakoid proton gradient in efficient recovery of leaf photosynthetic capacity

Chovancek, Erik; Živčák, Marek; Brestič, Marián; Hussain, Sajad; Allakhverdiev, Suleyman I.

doi:10.1007/s11120-020-00812-0

Cited by 23 publications

(16 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensitive plants had much lower ECS t than expected according to a low ETR PSII , but, at the same time, they showed a high proton conductivity (gH + ) resulting in a high proton flux, which was, evidently, not proportional to the observed electron transport rate. We previously observed a similar trend in wheat exposed to high temperatures (Chovancek et al 2021 ), which can be well explained by the leaks of H + through the thylakoid membrane (Bukhov et al 1999 ; Havaux et al 1996 ).…”

Section: Discussionsupporting

confidence: 66%

“…Data are presented as the mean value ± standard error (SE) from 10 to 20 leaves the proper regulation of linear electron transport is crucial, which requires the buildup of the transthylakoid proton gradient (Joliot and Johnson 2011). A low ECS t in salt-stress exposed plants of susceptible genotypes in our experiment shows that the accumulation of H + in thylakoid lumen was insufficient, which leads to a poor regulation of electron transport and over reduction of PSI acceptor side (Miyake et al 2005;Chovancek et al 2021). The related excessive production of reactive oxygen species may be responsible for the observed damage of photosynthetic components evident in chlorophyll fluorescence measurements as well as the decrease of chlorophyll content in leaves of susceptible wheat genotypes.…”

Section: Discussionmentioning

confidence: 78%

See 1 more Smart Citation

Electron and proton transport in wheat exposed to salt stress: is the increase of the thylakoid membrane proton conductivity responsible for decreasing the photosynthetic activity in sensitive genotypes?

et al. 2021

Self Cite

View full text Add to dashboard Cite

Effects of salinity caused by 150 mM NaCl on primary photochemical reactions and some physiological and biochemical parameters (K+/Na+ ratio, soluble sugars, proline, MDA) have been studied in five Triticum aestivum L. genotypes with contrasting salt tolerance. It was found that 150 mM NaCl significantly decreased the photosynthetic efficiency of two sensitive genotypes. The K+/Na+ ratio decreased in all genotypes exposed to salinity stress when compared with the control. Salinity stress also caused lipid peroxidation and accumulation of soluble sugars and proline. The amounts of soluble sugars and proline were higher in tolerant genotypes than sensitive ones, and lipid peroxidation was higher in sensitive genotypes. The noninvasive measurements of photosynthesis-related parameters indicated the genotype-dependent effects of salinity stress on the photosynthetic apparatus. The significant decrease of chlorophyll content (SPAD values) or adverse effects on photosynthetic functions at the PSII level (measured by the chlorophyll fluorescence parameters) were observed in the two sensitive genotypes only. Although the information obtained by different fast noninvasive techniques were consistent, the correlation analyses identified the highest correlation of the noninvasive records with MDA, K+/Na+ ratio, and free proline content. The lower correlation levels were found for chlorophyll content (SPAD) and Fv/Fm values derived from chlorophyll fluorescence. Performance index (PIabs) derived from fast fluorescence kinetics, and F735/F685 ratio correlated well with MDA and Na+ content. The most promising were the results of linear electron flow measured by MultispeQ sensor, in which we found a highly significant correlation with all parameters assessed. Moreover, the noninvasive simultaneous measurements of chlorophyll fluorescence and electrochromic band shift using this sensor indicated the apparent proton leakage at the thylakoid membranes resulting in a high proton conductivity (gH+), present in sensitive genotypes only. The possible consequences for the photosynthetic functions and the photoprotection are discussed.

show abstract

Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 78%

Electron and proton transport in wheat exposed to salt stress: is the increase of the thylakoid membrane proton conductivity responsible for decreasing the photosynthetic activity in sensitive genotypes?

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, none of these studies capture the extent of the reversal of physiological or molecular responses during the post-stress recovery phase to ascertain the level of phenotypic plasticity in plants. There are some papers that address this question in trees (Ameye et al, 2012;Haldimann & Feller, 2004;Hamerlynck & Knapp, 1996;Rueher et al, 2016) and in crops, including grape leaves (Liu et al, 2012), rice seedlings (Mangrauthia et al, 2017) and recent work on the recovery of photosynthetic capacity in wheat and spinach (Agrawal & Jajoo, 2021;Chovancek, Zivcak, Brestic, Hussain, & Allakhverdiev, 2021) and starch levels in cotton leaves (Loka, Oosterhuis, Baxevanos, Noulas, & Hu, 2020). Additionally, post-stress photosynthetic recovery in fieldgrown maize and soybeans (Siebers et al, 2015(Siebers et al, , 2017 has been recorded, as has the rapid recovery of leaf total non-structural carbohydrate levels after 12 hr of stress (Siebers et al, 2015).…”

Section: Developmental Stage Is a Crucial Determinant Of Plant Vulnerability To Heatmentioning

confidence: 99%

Plant heat stress: Concepts directing future research

Jagadish

Way

Sharkey

2021

Plant Cell & Environment

200

View full text Add to dashboard Cite

Predicted increases in future global temperatures require us to better understand the dimensions of heat stress experienced by plants. Here we highlight four key areas for improving our approach towards understanding plant heat stress responses. First, although the term ‘heat stress’ is broadly used, that term encompasses heat shock, heat wave and warming experiments, which vary in the duration and magnitude of temperature increase imposed. A greater integration of results and tools across these approaches is needed to better understand how heat stress associated with global warming will affect plants. Secondly, there is a growing need to associate plant responses to tissue temperatures. We review how plant energy budgets determine tissue temperature and discuss the implications of using leaf versus air temperature for heat stress studies. Third, we need to better understand how heat stress affects reproduction, particularly understudied stages such as floral meristem initiation and development. Fourth, we emphasise the need to integrate heat stress recovery into breeding programs to complement recent progress in improving plant heat stress tolerance. Taken together, we provide insights into key research gaps in plant heat stress and provide suggestions on addressing these gaps to enhance heat stress resilience in plants.

show abstract

“…Similarly, wheat genotypes of different origins have been evaluated to assess stress responses and mechanisms of stress tolerance [33][34][35]. Although multiple studies have focused on different traits associated with drought tolerance in wheat, including cuticular transpiration, studies providing information on variability in a diverse collection of wheat genetic responses are rather scarce.…”

Section: Introductionmentioning

confidence: 99%

Diversity of Leaf Cuticular Transpiration and Growth Traits in Field-Grown Wheat and Aegilops Genetic Resources

et al. 2021

Self Cite

View full text Add to dashboard Cite

Plants are subjected to unregulated water loss from their surface by cuticular transpiration. Therefore, specific morphophysiological changes may occur during leaf development to eliminate water loss. This study aimed to examine the cuticular transpiration of 23 winter wheat genotypes and their wild-growing predecessors of the genus Aegilops, which were divided into three groups to demonstrate their diversity. The genotypes were sown in autumn and grown in regular field trials at the Research Institute of Plant Production in Piešťany, Slovakia. Cuticular transpiration and growth parameters were analyzed in the postanthesis growth stage. Gravimetric measurement of residual water loss was performed on detached leaves with a precisely measured leaf area. The lowest nonproductive transpiration values were observed in modern wheat genotypes, while higher cuticular transpiration was observed in a group of landraces. Aegilops species generally showed the highest cuticular transpiration with increased water loss, but the total water loss per plot was low due to the low leaf area of the wild wheat relatives. Some of the growth parameters showed a good correlation with cuticular transpiration (e.g., dry mass per plant), but direct relationships between leaf traits and cuticular transpiration were not observed. This study identified a high diversity in cuticular resistance to water loss in wheat and Aegilops accessions of different origins. The potential of identifying and exploiting genetic resources with favorable cuticular transpiration in crop breeding is discussed.

show abstract

The different patterns of post-heat stress responses in wheat genotypes: the role of the transthylakoid proton gradient in efficient recovery of leaf photosynthetic capacity

Cited by 23 publications

References 86 publications

Electron and proton transport in wheat exposed to salt stress: is the increase of the thylakoid membrane proton conductivity responsible for decreasing the photosynthetic activity in sensitive genotypes?

Electron and proton transport in wheat exposed to salt stress: is the increase of the thylakoid membrane proton conductivity responsible for decreasing the photosynthetic activity in sensitive genotypes?

Plant heat stress: Concepts directing future research

Diversity of Leaf Cuticular Transpiration and Growth Traits in Field-Grown Wheat and Aegilops Genetic Resources

Contact Info

Product

Resources

About