External potassium mediates the response and tolerance to salt stress  in peanut at the flowering and needling stages

Shi, Xingyu; Zhou, Dazhai; Guo, Peng; Zhang, H.; Dong, Jinlong; Ren, J.Y.; Jiang, Chuang-Dao; Zhong, Cairong; Zhao, Xiuhua; Yu, Huili

doi:10.32615/ps.2020.070

Cited by 18 publications

(8 citation statements)

References 56 publications

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“…6 A–H), indicating that it was mainly stomatal limiting factors that caused the reduction in P n . The experimental results are consistent with findings observed in peanut 48 , cotton 49 and mung bean 50 and so on. Furthermore, photosynthetic pigments in chloroplasts are closely related to photosynthesis, and the decrease of pigment content in stressful environments also adversely affects gas exchange parameters 51 .…”

Section: Discussionsupporting

confidence: 91%

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

Meng

Feng

Zheng

et al. 2023

Sci Rep

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It is widely known that salt stress restricts rice growth and productivity severely. However, little information is available regarding the stage of rice seedlings subjected to the Heme oxygenase 1 (HO-1) inducer, Hemin. This study aimed to investigate the effects of salt stress on two rice varieties (Huanghuazhan and Xiangliangyou 900) and the effect of Hemin in promoting photosynthesis, carbohydrate metabolism, and key enzymes under salt-stress conditions. At the stage of three leaves and one heart, Huanghuazhan (HHZ) and Xiangliangyou 900 (XLY900) were sprayed with 5 μmol·L−1 Hemin and then subjected to 50 mM NaCl stress. The results showed that NaCl stress decreased the contents of chlorophyll a, chlorophyll b, and carotenoids. Furthermore, the net photosynthetic rate (Pn) decreased remarkably and the starch content was also lowered. However, NaCl treatment enhanced the concentration of sucrose and soluble sugar, simultaneously enhancing the sucrose metabolism. Nevertheless, the foliar spraying of exogenous Hemin mediated the increase in fructose and starch content, along with the activities of key enzymes’ soluble acid invertase (SAInv), basic/neutral invertase (A/N-Inv), and sucrose synthase (SS) in rice leaves under NaCl stress. The sucrose phosphate synthase (SPS) in leaves decreased significantly, and the fructose accumulation in leaves increased. Hemin also mediated the increase of starch content and the α-amylase, total amylase, and starch phosphorylase (SP) activities under NaCl stress. Under stress conditions, the application of the Heme oxygenase 1 (HO-1) inhibitor, ZnPP failed to alleviate the damage to rice seedlings by NaCl stress. The ZnPP treatment showed similar tendency to the NaCl treatment on pigment content, gas exchange parameters and carbon metabolism related products and enzymes. However, ZnPP decreased carotenoids, fructose, starch content and enzyme activities related to starch metabolism. The regulation effect of Hemin on HuangHuaZhan was better than XiangLiangYou 900. These results indicate that Hemin improved the effects of salt stress on the photosynthesis and physiological characteristics of rice leaves as a result of enhanced carbohydrate metabolism. Thus, Hemin could alleviate the damage caused by salt stress to a certain extent.

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Section: Discussionsupporting

confidence: 91%

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

Meng

Feng

Zheng

et al. 2023

Sci Rep

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“…Experimental soil was collected from the 0 to 20 cm thick cultivation layer of the experimental field and classified brown soil with 96.70 mg hydrolyzable N kg –1 , 27.50 mg available P kg –1 , 117.9 mg available K kg –1 , 15.17 g organic matter kg –1 , 680 mg soluble salinity kg –1 , and pH 6.5. Before sowing, the soil salinity concentration was adjusted to 2.5 g (NaCl) kg –1 to mimic a moderate soil salinity level in the field (S, 0.25% NaCl) ( Shi et al, 2020 ), and untreated soil served as the control (N, 0.00% NaCl). The soil (approximately 800 kg) was then put into the wooden planting boxes, and the same doses of 75 kg N ha –1 , 120 kg P 2 O 5 ha –1 , and 170 kg K 2 O ha –1 were applied as the basal fertilizer to each box.…”

Section: Methodsmentioning

confidence: 99%

Influence of Peanut, Sorghum, and Soil Salinity on Microbial Community Composition in Interspecific Interaction Zone

et al. 2021

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Soil microorganisms play important roles in crop production and sustainable agricultural management. However, soil conditions and crop selection are key determining factors for soil microbial communities. This study investigated the effect of plant types and soil salinity on the microbial community of interspecific interaction zone (II) based on the sorghum/peanut intercropping system. Microbial community diversity and composition were determined through PacBio single molecule, real-time sequencing of 16S rDNA and internal transcribed spacer (ITS) genes. Results showed Proteobacteria, Bacteroidota, and Acidobacteriota to be the dominant bacterial phyla in IP, II, and IS, whereas Ascomycota, Basidiomycota, and Mucoromycota were the dominant fungal phyla. Under salt-treated soil conditions, the plants-specific response altered the composition of the microbial community (diversity and abundance). Additionally, the interspecific interactions were also helpful for maintaining the stability and ecological functions of microbial communities by restructuring the otherwise stable core microbiome. The phylogenetic structure of the bacterial community was greatly similar between IP and II while that of the fungal community was greatly similar between IP and IS; however, the phylogenetic distance between IP and IS increased remarkably upon salinity stress. Overall, salinity was a dominant factor shaping the microbial community structure, although plants could also shape the rhizosphere microenvironment by host specificity when subjected to environmental stresses. In particular, peanut still exerted a greater influence on the microbial community of the interaction zone than sorghum.

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“…However, no studies have reported its effect on fruit production, yield and quality in melon. Recent investigations have related the beneficial effects of K in salt-stressed plants to the tolerance of each genotype to salinity, with more evident responses occurring in sensitive genotypes (Chakraborty et al, 2016;Shi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Potassium nutrition as a strategy to mitigate salt stress in melon grown under protected cultivation

Oliveira

Santos

et al. 2021

Semina: Ciênc. Agrár.

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The use of saline water is one of the major challenges of agriculture, as it can cause nutritional imbalances and thus reduce crop yield. This study proposes to examine the efficiency of potassium nutrition as a salt stress-mitigating agent in melon grown in a protected environment. The experiment was laid out in a randomized-block design with ten treatments in a 2 × 4 factorial arrangement represented by two melon cultivars (McLaren and SV1044MF) and four nutrient solutions (S1 - standard nutrient solution, 2.5 dS m-1; S2 - nutrient solution salinized with NaCl, 5.0 dS m-1; S3 - nutrient solution salinized with NaCl + 50% K, 6.5 dS m-1; and S4 - nutrient solution salinized with NaCl + 100% K, 7.5 dS m-1). Yield (average fruit weight, production, fruit diameter, internal cavity, and pulp thickness), quality (pulp firmness, total sugars, soluble solids [SS], vitamin C, pH, titratable acidity [TA] and SS/TA ratio) and nutritional (K, Na and K/Na ratio) variables were evaluated. Plants fertigated with standard nutrient solution showed the highest values for fruit weight (1,190.6 g), production (2,381.3 g per plant), fruit diameter (13.6 cm) and pulp thickness (2.6 cm). Cultivar McLaren produced heavier fruits (931.4 g) with larger diameter (12.4 cm) and pulp thickness (2.4 cm). The addition of NaCl to nutrient solution induced a reduction in the yield variables but did not influence fruit quality. The addition of extra K to salinized nutrient solution did not mitigate the deleterious effect of salinity on the yield of melon.

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External potassium mediates the response and tolerance to salt stress in peanut at the flowering and needling stages

Cited by 18 publications

References 56 publications

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

Exogenous Hemin alleviates NaCl stress by promoting photosynthesis and carbon metabolism in rice seedlings

Influence of Peanut, Sorghum, and Soil Salinity on Microbial Community Composition in Interspecific Interaction Zone

Potassium nutrition as a strategy to mitigate salt stress in melon grown under protected cultivation

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