A study on the effects of salinity and pH on PSII function in mulberry seedling leaves under saline–alkali mixed stress

Zhang, Huihui; Li, Xin; Che, Yanhui; Wang, Yue; Ma-bo, Li; Rong-yi, Yang; Xu, Nan; Guo-rong, Sun

doi:10.1007/s00468-019-01949-9

Cited by 31 publications

(5 citation statements)

References 59 publications

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“…This research employed rapid chlorophyll fluorescence kinetics technology and JIP -text analysis to investigate the impact of zinc on chlorophyll fluorescence in two rice varieties under saline-sodic stress conditions. Previous studies have indicated that saline-sodic stress leads to a decrease in the efficiency of the PSII reaction center and significant changes in chlorophyll fluorescence parameters [ 25 ], aligning with the findings of this study. Figure 3 A,B illustrates that the J -step and I -step in the OJIP curves of both rice varieties increased under saline-sodic stress.…”

Section: Discussionsupporting

confidence: 92%

“…Research indicates that under saline-sodic stress, the combination of ionic toxicity and osmotic stress can cause stomatal closure in rice leaves, thereby affecting the absorption of carbon dioxide [ 24 ]. Studies also have demonstrated that saline-sodic stress can impede the uptake of carbon dioxide by influencing crop PSII , cytochrome (Cyt b 6 /f ) complexes, and electron transfer processes, consequently affecting the production of photosynthetic products [ 25 ]. Saline-sodic stress limits light energy in plants, hindering assimilate production and leading to an accumulation of soluble sugars and starch in the source leaves.…”

Section: Introductionmentioning

confidence: 99%

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Zinc regulation of chlorophyll fluorescence and carbohydrate metabolism in saline-sodic stressed rice seedlings

Dang,

Mu,

Tian

et al. 2024

BMC Plant Biol

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Saline-sodic stress can limit the absorption of available zinc in rice, subsequently impacting the normal photosynthesis and carbohydrate metabolism of rice plants. To investigate the impact of exogenous zinc application on photosynthesis and carbohydrate metabolism in rice grown in saline-sodic soil, this study simulated saline-sodic stress conditions using two rice varieties, 'Changbai 9' and 'Tonghe 899', as experimental materials. Rice seedlings at 4 weeks of age underwent various treatments including control (CT), 2 μmol·L−1 zinc treatment alone (Z), 50 mmol·L−1 saline-sodic treatment (S), and 50 mmol·L−1 saline-sodic treatment with 2 μmol·L−1 zinc (Z + S). We utilized JIP-test to analyze the variations in excitation fluorescence and MR820 signal in rice leaves resulting from zinc supplementation under saline-sodic stress, and examined the impact of zinc supplementation on carbohydrate metabolism in both rice leaves and roots under saline-sodic stress. Research shows that zinc increased the chloroplast pigment content, specific energy flow, quantum yield, and performance of active PSII reaction centers (PIABS), as well as the oxidation (VOX) and reduction rate (Vred) of PSI in rice leaves under saline-sodic stress. Additionally, it decreased the relative variable fluorescence (WK and VJ) and quantum energy dissipation yield (φDO) of the rice. Meanwhile, zinc application can reduce the content of soluble sugars and starch in rice leaves and increasing the starch content in the roots. Therefore, the addition of zinc promotes electron and energy transfer in the rice photosystem under saline-sodic stress. It enhances rice carbohydrate metabolism, improving the rice plants’ ability to withstand saline-sodic stress and ultimately promoting rice growth and development.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Zinc regulation of chlorophyll fluorescence and carbohydrate metabolism in saline-sodic stressed rice seedlings

Dang,

Mu,

Tian

et al. 2024

BMC Plant Biol

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“…Moreover, a clear interaction was observed between soil salt content and soil pH (R = 0.859, p = 0.003). A similar soil salt content and pH relationship was discovered by Zhang et al in a pot experiment with mulberry seedling under saline-alkali conditions [29].…”

Section: Effect Of Cow Manure Compost On Saline-alkali Soil Salt Cont...supporting

confidence: 78%

Cow Manure Compost Promotes Maize Growth and Ameliorates Soil Quality in Saline-Alkali Soil: Role of Fertilizer Addition Rate and Application Depth

Liu

et al. 2022

Sustainability

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Soil salinization and alkalization is a global problem restricting agricultural production. This study compared different fertilizer regimes (addition rate and application depth) on maize growth and soil quality in saline-alkali soil. Cow manure compost was applied with addition rates of 6, 12, 18 and 24 t·ha−1, and application depths of 5 and 20 cm, along with 0.6 t·ha−1 mineral fertilizer, and compared to a control treatment with only mineral fertilizer application. Results indicated that cow manure compost application could promote maize growth and ameliorate soil quality in saline-alkali soil. Increasing cow manure compost addition rate alleviated soil salinity better than alkalinity, while increasing compost application depth could reduce soil alkalinity more effectively than soil salt content. Moreover, increasing cow manure compost addition rate improved soil organic matter and soil nutrient content, thus promoting shoot growth and maize yield. However, increasing cow manure compost application depth could boost root growth, and further absorbed more nutrients to promote maize yield. Cow manure compost application increased maize yield by 6.0% to 28.4% with a maximum yield of 8.14 t·ha−1 in a treatment with compost addition rate of 24 t·ha−1 and application depth of 20 cm. Comprehensive evolution of soil quality, maize growth and maize yield, cow manure compost addition rate of 24 t·ha−1 and application depth of 20 cm along with 0.6 t·ha−1 mineral fertilizer application is suggested for use in saline-alkali soil.

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“…Plant growth is inhibited under alkaline stress, probably due to reduced photosynthesis in broomcorn millet. Salt stress inhibits the synthesis of chlorophyll and accelerates its degradation (Zhang et al, 2020). A decrease in photosynthetic pigment levels was also observed in apples grown under alkaline stress (Liu et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Comparative transcriptomic and metabolomic study reveal that exogenous 24‐epiandrosterone mitigate alkaline stress in broomcorn millet (Panicum miliaceum L.) via regulating photosynthesis and antioxidant capacity

Wang

et al. 2023

GCB Bioenergy

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Globally, land alkalinization affecting agricultural development. Considering the increasingly serious effects of alkaline stress on agriculture and environment, phytoremediation may be an efficient way to addressed land alkalinization. Broomcorn millet (Panicum miliaceum L.) is a saline-alkaline-tolerant crop and bioenergy crop. However, the molecular mechanism of alkaline response on broomcorn millet remains large gap. To explore the alkaline stress on broomcorn millet and the mitigation of 24-epicastasterone (BR), the effects of CK (nutrient solution only), CB (nutrient solution + 0.5 mg L −1 BR), AS (alkaline stress), and AB (alkaline stress + 0.5 mg L −1 BR) on TA289 (alkaline-tolerant) and SA223 (alkaline-sensitive) were investigated. Alkaline stress enhanced reactive oxygen species and membrane lipid peroxidation. BR boosted antioxidant enzyme activities to reduce oxidative stress. Simultaneously, BR attenuated Na + toxicity and maintained ion homeostasis. Additionally, BR significantly maintained the physiological structure and photosynthetic properties. Transcriptomic and metabolomic analyses were applied to further evaluate the effect of BR on photosynthetic and antioxidant defense. The results showed that BR significantly reduced the transcriptional responses of photosynthesis and antioxidant defense and promoted the accumulation of effective metabolites such as biliverdin, l-glutamate, and phosphoric acid. Taken together, BR application can significantly alleviate the damage of alkaline stress to broomcorn millet by altering transcriptional expression and metabolite accumulation and is a simple and effective strategy to alleviate alkaline stress. This study reveals the molecular mechanism of BR to enhance photosynthetic capacity and antioxidant defense of broomcorn millet under alkaline stress, which provides theoretical support for the cultivation of bioenergy crops on alkaline lands and the breeding of alkaline-tolerant bioenergy varieties.

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A study on the effects of salinity and pH on PSII function in mulberry seedling leaves under saline–alkali mixed stress

Cited by 31 publications

References 59 publications

Zinc regulation of chlorophyll fluorescence and carbohydrate metabolism in saline-sodic stressed rice seedlings

Zinc regulation of chlorophyll fluorescence and carbohydrate metabolism in saline-sodic stressed rice seedlings

Cow Manure Compost Promotes Maize Growth and Ameliorates Soil Quality in Saline-Alkali Soil: Role of Fertilizer Addition Rate and Application Depth

Comparative transcriptomic and metabolomic study reveal that exogenous 24‐epiandrosterone mitigate alkaline stress in broomcorn millet (Panicum miliaceum L.) via regulating photosynthesis and antioxidant capacity

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