Effects of heat stress on photosystem II activity and antioxidant enzymes in two maize cultivars

Doğru, Ali

doi:10.1007/s00425-021-03611-6

Cited by 38 publications

(25 citation statements)

References 52 publications

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“…PI ABS is considered a major indicator of leaf health status, because it synthetically reflects maximum photochemical efficiency and the number of activated photochemical reaction centers of photosystem II (PSII) in plant cells (Dai et al, 2019). In response to heat stress, the heat-tolerant maize (Zea mays) genotype "DKC7221" has the ability to maintain significantly higher PI ABS than the heat-susceptible "P3167" (Doru, 2021). RWC and OP are the main parameters for evaluating leaf water status and osmoregulation ability.…”

Section: Discussionmentioning

confidence: 99%

Adaptability to High Temperature and Stay-Green Genotypes Associated With Variations in Antioxidant, Chlorophyll Metabolism, and γ-Aminobutyric Acid Accumulation in Creeping Bentgrass Species

et al. 2021

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High temperature limits the cultivation and utilization of cool-season plants in many regions worldwide. Recently, extreme hot waves swept across the globe in summer, leading to enormous economic loss. The evaluation and identification of genotypic variation in thermotolerance within species are critical to breeding for environmental adaptation and also provide potential materials to explore thermo-resistant mechanism in plants. Forty-two accessions of creeping bentgrass (Agrostis stolonifera), which is a cool-season perennial grass for turf and ecological remediation, were collected from 15 different countries. Physiological traits, namely, chlorophyll (Chl) content, electrolyte leakage, photochemical efficiency, performance index on absorption basis, leaf relative water content, and osmotic potential were used to evaluate the heat tolerance of these materials in controlled growth chambers and field during summer. Stay-green and early-aging genotypes were selected to further reveal the potential mechanism of tolerance to senescence and heat damage associated with alterations in Chl metabolism, antioxidant and photosynthetic capacity, and endogenous γ-aminobutyric acid (GABA). Findings showed that there were significant genetic variations in physiological traits among 41 materials in response to high temperature stress. The 13M, PROVIDENCE, and LOFTS L-93 were the top three accessions with superior tolerance to heat and summer stress than other materials in terms of laboratory and field tests. In response to heat stress, the stay-green genotype PROVIDENCE exhibited significantly higher photochemical efficiency, net photosynthetic rate, transpiration rate, and water use efficiency than the heat-susceptible W6 6570. Delayed leaf senescence in relation to less Chl loss was detected in the PROVIDENCE associated with maintenance of significantly higher expression levels of Chl-anabolic genes (AsCHLH, AsPBGD, and AsPOR) and lower Chl-catabolic gene AsPPH under heat stress. Genetic attributes, such as better capacity to scavenge reactive oxygen species and higher endogenous GABA content could play positive roles in alleviating heat-induced senescence, oxidative damage, and metabolic disturbance in the PROVIDENCE.

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Section: Discussionmentioning

confidence: 99%

Adaptability to High Temperature and Stay-Green Genotypes Associated With Variations in Antioxidant, Chlorophyll Metabolism, and γ-Aminobutyric Acid Accumulation in Creeping Bentgrass Species

et al. 2021

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“…High-temperature stress could increase the number of reactive oxygen species (ROS) such as superoxide anion radical (O 2 – ), H 2 O 2 , and hydroxyl radical (OH – ) ( Liu and Huang, 2000 ; Barnabas et al, 2008 ) and then result in the membrane peroxidation and accumulation of MDA ( Xu et al, 2006 ). Moreover, although high-temperature stress could increase the activities of SOD, POD, and CAT to remove sufficient ROS ( Blokhina et al, 2003 ; Obata et al, 2015 ), the activities of these enzymes decreased with an increase in the frequency of extreme high-temperature events ( Dat et al, 1998 ; Doru, 2021 ). Therefore, maize under SD2 had greater MDA content with lower activity of SOD, POD, and CAT in maize ear leaf compared to SD1 at V12 and R1 stages, and SD3 at R1 and R3 stages.…”

Section: Discussionmentioning

confidence: 99%

Adjusting sowing date improves the photosynthetic capacity and grain yield by optimizing temperature condition around flowering of summer maize in the North China Plain

Guo

Chen

et al. 2022

Front. Plant Sci.

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Adjusting the sowing date to optimize temperature conditions is a helpful strategy for mitigating the adverse impact of high temperature on summer maize growth in the North China Plain (NCP). However, the physiological processes of variation in summer maize yield with sowing date-associated changes in temperature conditions around flowering remain to be poorly understood. In this study, field experiments with two maize varieties and three sowing dates (early sowing date, SD1, 21 May; conventional sowing date, SD2, 10 June; delay sowing date, SD3, 30 June) were conducted at Xinxiang of Henan Province in 2019 and 2020. Early sowing markedly decreased the daily mean temperature (Tmean), maximum temperature (Tmax), and minimum temperature (Tmin) during pre-silking, while delay sowing markedly decreased those temperatures during post-silking. Under these temperature conditions, both varieties under SD1 at 12-leaf stage (V12) and silking stage (R1) while under SD3 at R1 and milking stage (R3) possessed significantly lower malondialdehyde (MDA) content in leaf due to higher activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) compared to SD2. Therefore, SD1 at V12 and R1 stages and SD3 at R1 and R3 stages for both varieties showed significantly higher photosynthetic capacity, including higher SPAD, Fv/Fm, Pn, Tr, and Gs, which promoted greater pre-silking dry matter (DM) accumulation for SD1 to increase the kernel number, and promoted greater post-silking DM accumulation for SD3 to increase the kernel weight, eventually increased the grain yield of SD1 and SD3 compared to SD2. Results of regression analysis demonstrated that Tmean, Tmax, and Tmin values from V12 to R1 stages lower than 26.6, 32.5, and 20.3°C are necessary for improving the kernel number, while Tmean, Tmax, Tmin, and accumulated temperature (AT) values from R1 to R3 stages lower than 23.2, 28.9, 17.3, and 288.6°C are necessary for improving the kernel weight. Overall, optimal temperature conditions around flowering can be obtained by early (21 May) or delay (30 June) sowing to improve the kernel number or kernel weight due to improved photosynthetic capacity, eventually increasing the grain yield of summer maize in the NCP.

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“…We found the only work explained that control plants were kept at 70±7% RH and experimental plants were heated at 48±6% RH (Sharma et al ., 2015). Before the HS experiments, plants were grown in the conditions varied from 40% RH (Pastenes and Horton, 1996; Doğru, 2021) to ~90% RH (Arena et al ., 2020); more often plants were grown at the conditions 60-65% RH (Havaux, 1996; Yan et al ., 2013; Turan et al ., 2019; Ferguson et al ., 2020; Yudina et al et al ., 2020). We are unsure is it critical or not.…”

Section: Introductionmentioning

confidence: 99%

“…Short time application is very popular. In many studies HS was applied for 5 min (Feller et al ., 1998), 10 min (Turan et al ., 2019), 15 min (Fergusson et al ., 2020), 20 min (Doğru, 2021), and 30 min (Yudina et al ., 2020). Short time HS (5-15 min) was obtained by the immersion of leaves into water with the corresponding temperature; HS treatment in hot air started from 20 min.…”

Section: Introductionmentioning

confidence: 99%

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Lower air humidity reduced both the plant growth and activities of photosystems I and II under prolonged heat stress

Lysenko

Kozuleva

Klaus

et al. 2022

Preprint

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The warming is global problem. In natural environments, a heat stress is accompanied with a drought usually. The effect of lower air humidity remains obscure. Maize and barley plants were supplied with an unlimited source of water for the root uptake and undergone to heat stress for 48 h at contrast conditions of air humidity. The lower air humidity decreased photochemical activities of photosystem I and photosystem II. The small effect was revealed in control. The temperature elevation to 37℃ and 42℃ increased relative activities of the both photosystems; the photosystem II was activated more. The effect of air humidity disappeared at 37℃; at 42℃, the effect was small. At 46℃, lower air humidity magnified substantially the inhibitory effect of heat. Consequently, the maximal and relative activities of the both photosystems were decreased in maize and barley; the plant growth was reduced greatly. The photosystem II was inhibited more. At 46℃, maize plants increased water uptake by roots at lower air humidity and survived; barley plants were unable to increase water uptake and died. Therefore, air humidity is the important component of environmental heat stress influencing activities of photosystem I and photosystem II and thereby plant growth and viability.

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Effects of heat stress on photosystem II activity and antioxidant enzymes in two maize cultivars

Cited by 38 publications

References 52 publications

Adaptability to High Temperature and Stay-Green Genotypes Associated With Variations in Antioxidant, Chlorophyll Metabolism, and γ-Aminobutyric Acid Accumulation in Creeping Bentgrass Species

Adaptability to High Temperature and Stay-Green Genotypes Associated With Variations in Antioxidant, Chlorophyll Metabolism, and γ-Aminobutyric Acid Accumulation in Creeping Bentgrass Species

Adjusting sowing date improves the photosynthetic capacity and grain yield by optimizing temperature condition around flowering of summer maize in the North China Plain

Lower air humidity reduced both the plant growth and activities of photosystems I and II under prolonged heat stress

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