Salt Priming Protects Photosynthetic Electron Transport against Low-Temperature-Induced Damage in Wheat

Hui, Li; Li, Huawei; Lv, Yanjie; Wang, Yongjun; Wang, Zongshuai; Xin, Caiyun; Liu, Shengqun; Zhu, Xiancan; Song, Fuqiang; Li, Xiangnan

doi:10.3390/s20010062

Cited by 17 publications

(7 citation statements)

References 29 publications

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“…This study shows that when the concentration of NaCl is ≥ 342mM, the OJIP curve of Salix alba will be deformed to OKJIP, the fluorescence values of points I and P will decrease significantly, and obvious inflection point K will appear. The occurrence of the K point is caused by damage to the PSII donor side oxygen release complex (OEC) due to the inhibition of the water lysis system and the receptor-side part before Q A , and the relatively variable fluorescence of the K point can represent the degree of OEC damage [ 69 , 70 ]. In addition, the high salt treatment greatly shortened the time required to reach the P point (the maximum fluorescence value).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Effects of salt stress on the photosynthetic physiology and mineral ion absorption and distribution in white willow (Salix alba L.)

et al. 2021

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Objective The purpose of this study was to explore the adaptive mechanism underlying the photosynthetic characteristics and the ion absorption and distribution of white willow (Salix alba L.) in a salt stress environment in cutting seedlings. The results lay a foundation for further understanding the distribution of sodium chloride and its effect on the photosynthetic system. Method A salt stress environment was simulated in a hydroponics system with different NaCl concentrations in one-year-old Salix alba L.branches as the test materials. Their growth, ion absorption, transport and distribution in the roots and leaves, and the changes in the photosynthetic fluorescence parameters were studied after 20 days under hydroponics. Results The results show that The germination and elongation of roots are promoted in the presence of 171mM NaCl, but root growth is comprehensively inhibited under increasing salt stress. Under salt stress, Na+ accumulates significantly in the roots and leaves, and the Na+ content and the Na+/K+ and Na+/Ca2+ root ratios are significantly greater than those in the leaves. When the NaCl concentration is ≤ 342mM, Salix alba can maintain relatively stable K+ and Ca2+ contents in its leaves by improving the selective absorption and accumulation of K+ and Ca2+ and adjusting the transport capacity of mineral ions to aboveground parts, while K+ and Ca2+ levels are clearly decreased under high salt stress. With increasing salt concentrations, the net photosynthetic rate (Pn), transpiration rate (E) and stomatal conductance (gs) of leaves decrease gradually overall, and the intercellular CO2 concentration (Ci) first decreases and then increases. When the NaCl concentration is < 342mM, the decrease in leaf Pn is primarily restricted by the stomata. When the NaCl concentration is > 342mM, the decrease in the Pn is largely inhibited by non-stomatal factors. Due to the salt stress environment, the OJIP curve (Rapid chlorophyll fluorescence) of Salix alba turns into an OKJIP curve. When the NaCl concentration is > 171mM, the fluorescence values of points I and P decrease significantly, which is accompanied by a clear inflection point (K). The quantum yield and energy distribution ratio of the PSⅡ reaction center change significantly (φPo, Ψo and φEo show an overall downward trend while φDo is promoted). The performance index and driving force (PIABS, PICSm and DFCSm) decrease significantly when the NaCl concentration is > 171mM, indicating that salt stress causes a partial inactivation of the PSII reaction center, and the functions of the donor side and the recipient side are damaged. Conclusion The above results indicate that Salix alba can respond to salt stress by intercepting Na+ in the roots, improving the selective absorption of K+ and Ca2+ and the transport capacity to the above ground parts of the plant, and increasing φDo, thus shows an ability to self-regulate and adapt.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Effects of salt stress on the photosynthetic physiology and mineral ion absorption and distribution in white willow (Salix alba L.)

et al. 2021

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“…The results have shown that low temperature stress has inhibitory effects on maize seed germination and seedling growth, plant height reduction, chlorophyll content and photosynthesis de-creased, physiological and biochemical indicators increased [39][40][41][42] . In the early stage of low temperature stress, it increased rapidly, and in the early stage of recovery, it decreased rapidly, with the prolongation of low temperature stress time, increasing SOD activity in maize roots, indicated that the scavenging ability of reactive oxygen species in maize was enhanced 35,[43][44][45] . In this study, there was no signi cant difference in relative germination rate among the three materials under low temperature stress.…”

Section: Discussionmentioning

confidence: 99%

Effects of histone methylation modification on low temperature seed germination and growth of maize

Wan

Zhang

et al. 2023

Preprint

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Low temperature is a limiting factor of seed germination and plant growth. Although there is a lot information on the response of maize to low temperatures, there is still poorly description of how histone methylation affects maize germination and growth development at low temperatures. In this study, the germination rate and physiological indexes of wild-type maize inbred lines B73 (WT), SDG102 silencing lines (AS), SDG102 overexpressed lines (OE) at germination stage and seedling stage were measured under low temperature stress (4℃), and transcriptome sequencing was applied to analyze the differences of gene expression in panicle leaves among different materials. The results showed that the germination rate of WT and OE maize seeds at 4℃ was significantly lower than 25℃. The content of MDA, SOD and POD of 4℃ seeding leaves higher than contrast. Transcriptome sequencing results showed that there were 409 different expression genes (DEGs) between WT and AS, and the DEGs were mainly up-regulated expression in starch and sucrose metabolism and phenylpropanoid biosynthesis. There were 887 DEGs between WT and OE, which were mainly up-regulated in the pathways of plant hormone signal transduction, porphyrin and chlorophyll metabolism. This result could provide a theoretical basis for analyzing the growth and development of maize from the perspective of histone methylation modification.

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“…Routinely used by seed companies to enhance the vigor of seeds, osmopriming techniques have shown promising germination and plant growth performance 38,39 under several adverse environmental conditions, such as chilling 40 , salinity 41,42 and drought 12 . In this method, seeds are immersed in an osmotic solution with low water potential (ψ) through the use of polyethylene glycol (PEG), mannitol, sorbitol, glycerol, or inorganic substances, such as NaCl, KCl, K2SiO3, KNO3, MgSO4, and CaCl2.…”

Section: Osmoprimingmentioning

confidence: 99%

“…The consequences of low temperature in wheat are reported to be increased ROS concentrations in the seeds, which disturb several biological mechanisms and cause an imbalance between the ability of leaves to absorb light and release energy to the cells to perform essential metabolic activities 51,52 . Considering that there is an estimated high demand for wheat in the future due to the rising population 53 and climate change, Li et al 40 improved the cold tolerance of wheat plants with osmopriming treatment in seeds (30 mM NaCl). The priming procedure successfully enhanced the photochemical efficiency in seedlings by decreasing MDA accumulation and alleviating cell death.…”

Section: Osmoprimingmentioning

confidence: 99%

Seed Priming Technology as a Key Strategy to Increase Crop Plant Production under Adverse Environmental Conditions

García¹,

Arif²,

Zhao³

et al. 2021

Preprint

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Farmers and seed companies constantly require high-quality seeds with excellent agronomic performance. However, faced with environmental adversity, limited natural resources and increasing food demand around the globe, more attention has turned to improving crop plant production by implementing efficient strategies. Seed priming technology has shown promising biological improvements leading to suitable agronomic performance in crop plants under adverse environmental conditions. Seeds are subjected to controlled conditions that are conducive to complex physiological, biochemical, and molecular changes, conferring specific stress tolerance to subsequent germination and growth conditions. In this review paper, we aimed to study the recent approaches in the efficiency of hydropriming, osmopriming, chemopriming, hormopriming, nanopriming, matrix priming, biopriming, physical priming and hybrid priming procedures in the production of crop plants under environmental adversity, as well as their biological mechanism changes. All priming methods demonstrated relevant changes in the biological mechanism related to crop plant production by mitigating salinity effects, heavy metals, and flooding stress and enhancing chilling, heat, drought and phytopathogen tolerance. We strongly recommend that researchers combine multiple priming methods, known as hybrid priming, in their investigations to provide novel technologies and additional biological approaches to enhance the knowledge of crop plant science. Thus, the findings shed light on the use of seed priming technology as a key strategy to increase crop plant production under environmental adversity by acquiring stress tolerance and enhancing agronomic traits to meet the global food demand.

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Salt Priming Protects Photosynthetic Electron Transport against Low-Temperature-Induced Damage in Wheat

Cited by 17 publications

References 29 publications

Effects of salt stress on the photosynthetic physiology and mineral ion absorption and distribution in white willow (Salix alba L.)

Effects of salt stress on the photosynthetic physiology and mineral ion absorption and distribution in white willow (Salix alba L.)

Effects of histone methylation modification on low temperature seed germination and growth of maize

Seed Priming Technology as a Key Strategy to Increase Crop Plant Production under Adverse Environmental Conditions

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