Changes in Photosynthetic Characteristics of Paeonia suffruticosa under High Temperature Stress

Wen, Junbao; Luo, Haiyan; Song, Yuqin; Hong, Erman; Li, Zhijun; Lin, Bangyu; Fan, Chenwei; Wang, Huasen; Song, Xinzhang; Jin, Shuai; Chen, Xia; Zhu, Xiangtao

doi:10.3390/agronomy12051203

Cited by 14 publications

(8 citation statements)

References 27 publications

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“…The content of Car in the two dahlia varieties first decreased and then increased, indicating that with increasing high-temperature stress, the antioxidant function of Car in dahlias was enhanced and the effect of supplementing photosynthetic pigments was weakened, causing the synthesis of Car in dahlias to increase and consumption to decrease. Under high-temperature stress, the Pn and Fv/Fm of the two dahlia varieties decreased significantly (p < 0.05) compared with the control, which is consistent with the findings in wheat [43], possibly because the high-temperature stress causes the destruction of the chloroplast structure and the degradation of photosynthetic pigments, which affects the absorption of light energy by PSI and PSII; PSII is more susceptible to temperature [44], causing oxidation of the PSII reaction center proteins [45], thereby weakening photosynthesis and resulting in a decrease in Fv/Fm [46]. At the same time, high temperatures can cause the enhancement of plant respiration and accelerate the consumption of substrates, which in turn causes a decrease in Pn [47].…”

Section: Discussionsupporting

confidence: 84%

Response of Dahlia Photosynthesis and Transpiration to High-Temperature Stress

Liu,

Zhang,

Niu

et al. 2023

Horticulturae

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The high temperature may cause difficult growth or bloom in the summer, which is the key problem limiting the cultivation and application of dahlia. The photosynthetic physiological mechanisms of dahlia under high temperature stress were studied to provide a theoretical basis for expanding the application range of cultivation and annual production. Two dahlia varieties, ‘Tampico’ and ‘Hypnotica Tropical Breeze’, were used as test materials and were treated for 1 d or 2 d at temperatures of 35/30 °C or 40/35 °C (day/night: 14 h/10 h) and then recovered at 25/20 °C for 7 d. A 25/20 °C treatment was used as the control. The results are as follows: (1) High-temperature stress resulted in the chlorophyll (Chl) content, Fv/Fm, transpiration rate (Tr), net photosynthetic rate (Pn), and water potential decreasing significantly, and the Chl content, Tr, and stomatal density of ‘Tampico’ were higher than those of ‘Hypnotica Tropical Breeze’ during the same period. (2) After the two dahlia varieties were treated with high-temperature stress and recovered at 25/20 °C for 7 d, the plant morphology and various physiological indices under the 35/30 °C treatment gradually returned to normal, with ‘Tampico’ in better condition than ‘Hypnotica Tropical Breeze’. (3) Both dahlia varieties could not withstand the stress of 40/35 °C for 2 days.

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Section: Discussionsupporting

confidence: 84%

Response of Dahlia Photosynthesis and Transpiration to High-Temperature Stress

Liu,

Zhang,

Niu

et al. 2023

Horticulturae

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“…This indicates the less resistance to CO 2 entry into intercellular spaces (Sun et al, 2023). Therefore, these results suggest the use of ratio to identify the heat tolerant germplasm but only combing with other gas exchange parameters such as CO2 consumption and availability traits (Ji et al, 2022).…”

Section: Discussionmentioning

confidence: 88%

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Bashir,

Nicolao,

Barros

et al. 2023

Preprint

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Heat stress is one of the major factors reducing potato yield by limiting the plant photosynthesis activity, production and partitioning of assimilates to the sink. Potato wild relatives (Solanum sect. Petota) are a natural reservoir of valuable traits for abiotic stress resistance. However, it is necessary to assess the response of wild potato genotypes based on physiological features such as gas exchange, chlorophyll index and chlorophyll fluorescence that are promising candidates to improve crop photosynthesis under adverse conditions. Multivariate approaches on two factor experimental design were used to select the best performing genotypes for most important traits influencing the photosynthetic activity under control and heat stress treatments. The most important traits to be focused on are net photosynthetic rates, transpiration rates, and stomatal conductance along with effective photochemical yield of PSII, Coefficient of photochemical yield of PSII, electron transport rate and Fv/Fm ratio which are highly associated with heat stress conditions. Solanum commersonii accessions (BGB003, BGB009) are more likely to be tolerant to heat stress, followed by S. tuberosum 2x (BGB091, BGB093) and S. chacoense (BGB101). The assessment of wild accessions for photosynthetic traits under heat stress is a reliable way to discriminate the most promising sources of abiotic stress resistance even though they have unreliable tuber traits for the breeding of the potato crop.

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“…This indicates the less resistance to CO 2 entry into intercellular spaces (de Oliveira et al 2023). Therefore, these results suggest the use of ratio to identify the heat tolerant germplasm but only combing with other gas exchange parameters such as CO2 consumption and availability traits (Ji et al 2022).…”

Section: Discussionmentioning

confidence: 95%

Phenotyping wild potatoes for photosynthesis associated traits under heat stress

Bashir,

Nicolao,

Haerter

et al. 2023

Preprint

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Heat stress is one of the major factors reducing potato yield by limiting the plant photosynthesis activity, production and partitioning of assimilates to the sink. Potato wild relatives (Solanum sect. Petota, Solanaceae) are a natural reservoir of valuable traits for abiotic stress resistance. However, it is necessary to assess the response of wild potato genotypes based on physiological features such as gas exchange, chlorophyll index and chlorophyll fluorescence that are promising candidates to improve crop photosynthesis under adverse conditions. Multivariate approaches on two factor experimental design were used to phenotype the best performing genotypes for most important traits under control and heat stress treatments. From the results, the most important traits to be focused on are net photosynthetic rates, transpiration rates, and stomatal conductance along with effective photochemical yield of PSII, Coefficient of photochemical yield of PSII and dry matter content, which are highly associated with heat stress conditions. Solanum commersonii accession (BGB451) and S. chacoense (BGB467, BGB113, BGB444, BGB083) are the top five genotypes of the heat stress tolerant group. However, BRSBEL, BGB003, BGB091 and BGB101 are most susceptible to heat stress. From our study, we concluded that most genotypes phenotyped for heat stress resistance belong to S. chacoense. The assessment of wild accessions for photosynthetic traits under heat stress is a reliable way to discriminate the most promising sources of abiotic stress resistance even though they do not have best quality tuber traits for the breeding of the potato crop.

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Changes in Photosynthetic Characteristics of Paeonia suffruticosa under High Temperature Stress

Cited by 14 publications

References 27 publications

Response of Dahlia Photosynthesis and Transpiration to High-Temperature Stress

Response of Dahlia Photosynthesis and Transpiration to High-Temperature Stress

Phenotyping wild potatoes (Solanum Sect. Petota) for photosynthesis associated traits under heat stress.

Phenotyping wild potatoes for photosynthesis associated traits under heat stress

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