Effects of polyamines on agronomic traits and photosynthetic physiology  of wheat under high temperature stress

Jing, Jianguo; Guo, Shuying; Li, Y.F.; Li, W.H.

doi:10.32615/ps.2019.104

Cited by 11 publications

(12 citation statements)

References 32 publications

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“…Both the CO 2 assimilation capacity and electron transport processes including the PS II activity showed a decline above a critical temperature value. It has also been demonstrated previously, that heat acclimation alters both the light and dark reactions of photosynthesis (Jing et al 2019). However, even if the changes contained common elements, they varied depending on genotypes.…”

Section: Discussionmentioning

confidence: 60%

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Janda

Tajti

Hamow

et al. 2020

Physiologia Plantarum

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The aim of the present work was to better understand the molecular mechanisms of heat acclimation processes in cereals. A large number of winter and spring wheat, barley and oat varieties were grown under either control conditions (22/20°C) or under a mild heat stress (30°C) that induce the acclimation processes. The temperature dependence of chlorophyll a fluorescence induction and gas exchange parameters showed that heat acclimation increased the thermotolerance of the photosynthetic apparatus, but these changes did not differ sharply in the winter–spring type cereals. Similarly, to wheat, elevated temperature also led to increasing transpiration rate and reduced water use efficiency in barley and oat plants. A non‐targeted metabolomic analysis focusing on polar metabolites in two selected barley (winter type Mv Initium and spring type Conchita) and in two oat varieties (winter type Mv Hópehely and spring type Mv Pehely) revealed substantial differences between both the two species and between the acclimated and non‐acclimated plants. Several compounds, including sugars, organic acids, amino acids and alcohols could be separated and detected. The expression level of the CYP707, HSP90, galactinol synthase, raffinose synthase and α‐galactosidase genes showed genotype‐dependent changes after 1 day; however, the CYP707 was the only one, which was still upregulated in at least some of the genotypes. Results suggest that heat acclimation itself does not require general induction of primary metabolites. However, induction of specific routes, e.g. the induction of the raffinose family oligosaccharides, especially the synthesis of galactinol, may also contribute the improved heat tolerance in cereals.

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Section: Discussionmentioning

confidence: 60%

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Janda

Tajti

Hamow

et al. 2020

Physiologia Plantarum

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“…This indicates that the electron transfer of photosynthetic electrons was blocked, and the efficiency of photosynthetic pigments converting light energy into chemical energy decreased. 47 , 48 Pretreatment with exogenous Spd under HT stress could improve ΦPSII, but reduce NPQ, which might be that exogenous Spd could protect PSII from excessive energy damage, and enhance the stability of the reaction center of the photosystem, 18 which is conducive to the conversion of light energy into chemical energy, thereby providing enough energy for carbon assimilation.…”

Section: Discussionmentioning

confidence: 99%

“…It enhances photosynthesis and HT tolerance in wheat. 18 Moreover, the Spd pretreatment alleviates the negative effects of HT on the photochemical efficiency of the photosystem II (PSII) of lettuce seedlings. 19 , 20 Furthermore, exogenous Spd regulates antioxidant enzyme activity, reducing superoxide anion rate and malondialdehyde (MDA) content to maintain plant cell membrane stability.…”

Section: Introductionmentioning

confidence: 99%

Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature

Tang

Liu

et al. 2022

Plant Signaling & Behavior

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Studies have not fully explained the underlying mechanism of spermidine-mediated heat tolerance. This study investigated the possible role of spermidine (Spd) in regulating citrus heat tolerance. The results showed that exogenous Spd effectively alleviated the limitation of high temperature (HT) on photosynthesis. Exogenous Spd increased the chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration, stomatal conductance, maximum and effective quantum yield of PSII photochemistry, nonphotochemical quenching coefficient, and electron transport rate in citrus seedlings under HT stress, but declined the stomatal limitation value. In addition, Spd treatment promoted the dynamic balance of the citrus enzymatic and non-enzymatic antioxidants system. Spd application significantly increased the activity of superoxide dismutase, peroxidase, catalase, ascorbic acid, and glutathione and the expression level of corresponding genes at high temperature, while reducing the content of H 2 O 2 and malondialdehyde. Therefore, our findings suggested exogenous Spd significantly ameliorated citrus physiological and photosynthetic adaptation under HT stress, thereby providing helpful guidance for citrus cultivation in HT events.

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“…Besides, clear evidence was found about a positive correlation between CH, the leaf RWC, and the Na content, which also positively correlates with the weight of 100 kernels and the total kernels weight ( Figure 6B ). It can be because the application of PAs under stress has been reported to protect the photosynthetic apparatus (ensuring the synthesis of photosynthates) and increase the osmotic adjustment of the plants under stress conditions ( Chen et al, 2019b ; Jing et al, 2019 ). Moreover, Xu et al (2016) suggested that PA might be involved in the starch biosynthesis in kernels during post-anthesis when the soil is drying.…”

Section: Discussionmentioning

confidence: 99%

Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario

et al. 2022

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Biostimulants have become an asset for agriculture since they are a greener alternative to traditionally used plant protection products. Also, they have gained the farmers’ acceptance due to their effect on enhancing the plant’s natural defense system against abiotic stresses. Besides commercially available complex products, small molecule-based biostimulants are useful for industry and research. Among them, polyamines (PAs) are well-studied natural compounds that can elicit numerous positive responses in drought-stressed plants. However, the studies are merely focused on the vegetative development of the plant. Therefore, we aimed to evaluate how drenching with putrescine (Put) and spermidine (Spd) modified the maize production and the yield quality parameters. First, a dosage optimization was performed, and then the best PA concentrations were applied by drenching the maize plants grown under well-watered (WW) conditions or water deficit (WD). Different mechanisms of action were observed for Put and Spd regarding maize production, including when both PAs similarly improved the water balance of the plants. The application of Put enhanced the quality and quantity of the yield under WW and Spd under WD. Regarding the nutritional quality of the grains, both PAs increased the carbohydrates content, whereas the contribution to the protein content changed by the interaction between compound and growth conditions. The mineral content of the grains was also greatly affected by the water condition and the PA application, with the most relevant results observed when Spd was applied, ending with flour richer in Zn, Cu, and Ca minerals that are considered important for human health. We showed that the exogenous PA application could be a highly efficient biofortification approach. Our findings open a new exciting use to be studied deep in the biostimulant research.

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Effects of polyamines on agronomic traits and photosynthetic physiology of wheat under high temperature stress

Cited by 11 publications

References 32 publications

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature

Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario

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