Effects of high temperature on photosynthesis, chlorophyll fluorescence, chloroplast ultrastructure, and antioxidant activities in fingered citron

Chen, W. R.; Zheng, Jiangzhu; Li, Y. Q.; Guo, Weidong

doi:10.1134/s1021443712060040

Cited by 56 publications

(30 citation statements)

References 23 publications

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“…Moreover, the increased terminal temperature during flowering increased canopy temperature and leaf and stem rust susceptibility. Total chlorophyll content declined significantly under the late sown condition, suggesting structural damage to the chloroplast due to heat stress [7][8][9]42]. The decrease in the total chlorophyll content in response to induced heat stress has also been reported previously in several crops [43][44][45][46][47].…”

Section: Discussionsupporting

confidence: 78%

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Elbasyoni

2018

Agronomy

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Egypt, the fifteenth most populated country and the largest wheat importer worldwide, is vulnerable to global warming. Ten of the commercial and widely grown wheat cultivars were planted in two locations, i.e., Elbostan and Elkhazan for three successive seasons 2014/2015, 2015/2016, and 2016/2017 under two sowing dates (recommended and late). Elbostan and Elkhazan are the two locations used in this study because they represent newly reclaimed sandy soil and the Nile delta soil (clay), respectively. A split-plot, with main plots arranged as a randomized complete block design and three replicates, was used. The overall objective of this study was to identify the ideal cultivar for recommended conditions and heat stressed conditions. The results revealed that heat stress had a significant adverse impact on all traits while it raised the prevalence and severity of leaf and stem rust which contributed to overall yield losses of about 40%. Stability measurements, the additive main effects and multiplicative interaction model (AMMI) and genotype main effect plus genotype × environment interaction (GGE), were useful to determine the ideal genotypes for recommended and late sowing conditions (heat stressed). However, inconsistency was observed among some of these measurements. Cultivar "Sids12" was stable and outperformed other tested cultivars under combined sowing dates across environments. However, cultivar "Gemmeiza9" was more stable and outperformed other cultivars across environments under the recommended sowing date. Moreover, cultivar "Gemmeiza12" was the ideal cultivar for the late sown condition. Based on our findings, importing and evaluating heat stress tolerant wheat genotypes under late sown conditions or heat stressed conditions in Egypt is required to boost heat stress tolerance in the adapted wheat cultivars.

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Section: Discussionsupporting

confidence: 78%

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Elbasyoni

2018

Agronomy

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“…Among organelles, chloroplasts are the most sensitive to high temperature stress and the main location for producing ROS (Mubarakshina and Ivanov 2010), whose ultrastructure is inevitable to be affected or even damaged (Wahid et al 2007). Chen et al (2012) observed vacuolation and separation of chloroplast lamella pairs in fingered citron at a 40°C treatment; swelling and dilation of chloroplasts, fracture of the chloroplasts membrane, disruption of thylakoids, and unstacking of the grana at a 45°C treatment. Additionally, Xu et al (2006) found that the percentage of deformed chloroplasts in the leaves of two turfgrass species increased with increasing high temperature stress levels, especially over 95% of chloroplasts were seriously damaged in heat-sensitive perennial ryegrass at 46°C.…”

Section: Discussionmentioning

confidence: 88%

Biochemical and molecular responses of herbaceous peony to high temperature stress

Zhao

Han

et al. 2016

Can. J. Plant Sci.

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To clarify the theoretical basis of the differences in high temperature stress tolerance among herbaceous peony (Paeonia lactiflora Pall.), we investigated the heat injury index of twelve P. lactiflora cultivars. Of these, heat-tolerant 'Zifengyu' and moderately heat-tolerant 'Hongyanzhenghui' were selected to study the biochemical and molecular responses to high temperature stress. 'Zifengyu' had reduced malondialdehyde (MDA) content, increased soluble sugar, chlorophyll (Chl) a, Chl b, Chl a + b. and carotenoid contents, as well as elevated antioxidant enzymes activities, photosynthetic rate (Pn), transpiration rate (Tr) and relatively intact cellular structures compared with 'Hongyanzhenghui', especially when the temperature was the highest. Additionally, we isolated partial cDNAs of two heat shock protein genes (HSP60 and HSP90) from P. lactiflora, which were 880-bp and 1077-bp nucleotides in length, respectively. The expression levels of PlHSP60, PlHSP70 and PlHSP90 were lower in 'Zifengyu' than in 'Hongyanzhenghui' for the first three of four developmental stages examined. These results indicated that heat-tolerant P. lactiflora cultivar could effectively scavenge reactive oxygen species (ROS), protect cellular structures, reduce thermal damage and delay the death of plants by enhancing antioxidant enzymes activities and HSP expression under high temperature stress. These findings provide a theoretical basis for breeding heat-tolerant P. lactiflora cultivars.Key words: herbaceous peony, high temperature stress, physiological mechanism, heat shock protein.Résumé : Afin d'éclaircir les fondements théoriques expliquant la tolérance variable des pivoines de Chine (Paeonia lactiflora Pall.) au stress thermique, les chercheurs ont examiné l'indice des dommages causés par la chaleur de douze cultivars. Parmi ceux-ci, on a retenu les variétés Zifengyu, résistante à la chaleur, et Hongyanzhenghui, modérément tolérante à la chaleur, pour approfondir les réactions biochimiques et moléculaires au stress thermique. Comparativement à Hongyanzhenghui, la variété Zifengyu se caractérise par une plus faible teneur en malondialdéhyde (MDA), une concentration plus élevée de sucres solubles, de chlorophylle (Chl) a, de Chl b, de Chl a + b et de caroténoïdes, ainsi qu'une hausse de l'activité des enzymes antioxydants, du taux de photosynthèse (Pn), du taux de transpiration (Tr) et de la quantité d'organites cellulaires relativement intacts, surtout quand la température atteint un maximum. Par ailleurs, les auteurs ont isolé une partie de l'ADNc des gènes codant deux protéines de choc thermique (HSP60 et HSP90) chez P. lactiflora, dont lalongueur respective est de 880-bp et de 1,077-bp nucléotides. Le taux d'expression des gènes PlHSP60, PlHSP70 et PlHSP90 était plus faible chez Zifengyu que chez Hongyanzhenghui au cours des trois premiers stades de développement sur les quatre examinés. Ces résultats indiquent que le cultivar de P. lactiflora résistant à la chaleur pourrait neutraliser les dérivés réactifs de l'oxygè...

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“…These results suggest that Si may be involved in the thermal stability of lipids in cell membranes although the mechanism has not been elucidated (Ma, 2004). Chlorophyll fluorescence has been widely used as an early indication of many kinds of plant stress, including temperature (Chen et al, 2012;Kalaji et al, 2011;Maxwell and Johnson, 2000). Chlorophyll fluorescence parameter Fv/Fm was more sensitive to temperature in plants (Salvucci and Crafts-Brander, 2004).…”

Section: Resultsmentioning

confidence: 99%

Effect of Silicon on Growth and Temperature Stress Tolerance of Nephrolepis exaltata ‘Corditas’

Sivanesan¹,

Son²,

Soundararajan³

et al. 2014

HST

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Effect of silicon (Si) nutrition on growth and temperature stress tolerance of Nephrolepis exaltata 'Corditas' grown in a soilless substrate was examined. In vitro-grown acclimatized plantlets were transplanted into the pots containing a coir-based substrate. A nutrient solution containing 0, 50, or 100 mg･L -1 Si was supplied through a drip-irrigation system. After 5 months of cultivation, Si-treated and -untreated plants were grown at 10, 25, or 40 ± 1°C under a 12 h photoperiod with 530 µmol･m PPFD and 60% RH. After 7 days, chlorophyll content and chlorophyll fluorescence parameters were measured. Silicon nutrition had a negative effect on growth characteristics of N. exaltata 'Corditas'. However, Si-treated plants had more tolerance to temperature stress than the control plants. The Fv/Fm value was not significantly different when the plants were exposed to 25°C. However, significant difference in Fv/Fm was recorded when plants were exposed to 10 or 40°C. Thus, Fv/Fm could be used as an indicator of low and high temperature tolerance in ferns. The present study also suggests that application of Si may be used to enhance temperature tolerance of ferns.

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Effects of high temperature on photosynthesis, chlorophyll fluorescence, chloroplast ultrastructure, and antioxidant activities in fingered citron

Cited by 56 publications

References 23 publications

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Performance and Stability of Commercial Wheat Cultivars under Terminal Heat Stress

Biochemical and molecular responses of herbaceous peony to high temperature stress

Effect of Silicon on Growth and Temperature Stress Tolerance of Nephrolepis exaltata ‘Corditas’

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