Response of gas-exchange characteristics and chlorophyll fluorescence to acute sulfur dioxide exposure in landscape plants

JiuJu, Duan; Fu, Baochun; Kang, Hongmei; Song, Zhuoqin; Jia, Minlong; Cao, Dongmei; Wei, Aili

doi:10.1016/j.ecoenv.2018.12.064

Cited by 24 publications

(18 citation statements)

References 39 publications

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“…3c,d) accompanied by high E (Fig. 3b) suggesting that these fertilizers influence stomatal regulation and further stabilize Fe-S clusters to improve the functioning of vital cellular processes such as photosynthesis and respiration under water deficit conditions 73,74 . In a study involving contrasting B. napus genotypes (Mosa and Saturnin), Lee et al 39 reported higher photosynthetic activity in genotype (Saturnin) with high sulfur use efficiency that ultimately contributed to better drought tolerance.…”

Section: Discussionmentioning

confidence: 99%

Sulfate-mediated Drought Tolerance in Maize Involves Regulation at Physiological and Biochemical Levels

Usmani

Nawaz

Majeed³

et al. 2020

Sci Rep

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Restriction in nutrient acquisition is one of the primary causes for reduced growth and yield in water deficient soils. Sulfur (S) is an important secondary macronutrient that interacts with several stress metabolites to improve performance of food crops under various environmental stresses including drought. Increased S supply influences uptake and distribution of essential nutrients to confer nutritional homeostasis in plants exposed to limited water conditions. The regulation of S metabolism in plants, resulting in synthesis of numerous S-containing compounds, is crucial to the acclimation response to drought stress. Two different experiments were laid out in semi-controlled conditions to investigate the effects of different S sources on physiological and biochemical mechanisms of maize (Zea mays L. cv. P1574). Initially, the rate of S application in maize was optimized in terms of improved biomass and nutrient uptake. The maize seedlings were grown in sandy loam soil fertigated with various doses (0, 15, 30 and 45 kg ha −1) of different S fertilizers viz. K 2 So 4 , feSo 4 , cuSo 4 and na 2 So 4. The optimized S dose of each fertilizer was later tested in second experiment to determine its role in improving drought tolerance of maize plants. A marked effect of S fertilization was observed on biomass accumulation and nutrients uptake in maize. In addition, the optimized doses significantly increased the gas exchange characteristics and activity of antioxidant enzymes to improve yield of maize. Among various S sources, application of K 2 So 4 resulted in maximum photosynthetic rate (43%), stomatal conductance (98%), transpiration rate (61%) and sub-stomatal conductance (127%) compared to no S supply. Moreover, it also increased catalase, guaiacol peroxidase and superoxide dismutase activities by 55, 87 and 65%, respectively that ultimately improved maize yield by 33% with respect to control under water deficit conditions. These results highlight the importance of S fertilizers that would likely be helpful for farmers to get better yield in water deficient soils. Maize (Zea mays L.) is one of the major cereal crops that provide food for humans and feed for livestock. The demand for maize seed has increased significantly during past few decades due to its consumption in poultry feed and wet milling industry. The importance of maize as a food crop is well recognized and is used as a staple food in many parts of the world 1. Maize seed is an abundant source of energy as 100 g seed provides 365 kilocalories of energy 2. However, it is an extensive nutrient crop and excessive use of fertilizers to obtain high yield has resulted in the depletion of nutrients particularly sulfur (S) in soils 3. Moreover, water shortage due to climate change may induce further losses in maize production in future. Adaptation of maize to limited water conditions has received great interest from farmers, researchers and policy makers considering its importance in nutritional food security. Since maize requires large quantities of water to...

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Section: Discussionmentioning

confidence: 99%

Sulfate-mediated Drought Tolerance in Maize Involves Regulation at Physiological and Biochemical Levels

Usmani

Nawaz

Majeed³

et al. 2020

Sci Rep

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“…However, the duration of this "juvenile" effect is highly variable. For instance, small and short-lived (< 0.5 ‰ over 5 years; Duffy et al, 2017), to moderately intense and long δ 18 O effects (1.2 ‰ increase over 10 years; Labuhn et al, 2014) are reported for oak cellulose. But a majority of studies conclude that there is an absence of juvenile effects on δ 18 O series (e.g., Raffalli-Delerce et al, 2004;Porter et al, 2009;Daux et al, 2011;Young et al, 2011;Li et al, 2015;Kilroy et al, 2016).…”

Section: Height and Stand Dynamicsmentioning

confidence: 99%

An overview on isotopic divergences – causes for instability of tree-ring isotopes and climate correlations

Savard

Daux

2020

Clim. Past

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Abstract. Climatic reconstructions based on tree-ring isotopic series convey substantial information about past conditions prevailing in forested regions of the globe. However, in some cases, the relations between isotopic and climatic records appear unstable over time, generating the “isotopic divergences”. Former reviews have thoroughly discussed the divergence concept for tree-ring physical properties but not for isotopes. Here we want to take stock of the isotopic divergence problem, express concerns and stimulate collaborative work for improving paleoclimatic reconstructions. There are five main causes for divergent parts in isotopic and climatic series: (1) artefacts due to sampling and data treatment, relevant for dealing with long series using sub-fossil stems; (2) stand dynamics, including juvenile effects mostly occurring in the early part of tree-ring series; (3) rise in atmospheric pCO2, which can directly influence the foliar behaviour; (4) change in climate, which may modify the isotope–climate causal links; and finally (5) atmospheric pollution, which may alter leaf and root functions. Future paleoclimate research would benefit from interdisciplinary efforts designed to develop further process-based models integrating multi-proxy inputs so as to help identify causes of isotopic divergences and circumvent some of them in inverse applications.

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“…Documented response mechanisms of trees exposed to chronic SO2 emissions include changes in stomatal conductance, photosynthesis, dark respiration, starch production and priority of C allocation (Darrall, 1989;Meng et al, 1995;Kolb and Matyssek, 2001;Wagner and Wagner, 2006;Grams et al, 2007). With SO2, exposition at 25 mg/m 3 induces photoinhibition and decreases A, g and Ci of plants (Duan et al, 2019). The exact mechanisms responsible for closing stomata differ between SO2, O3 and non-harmful CO2 in terms of molecular biology.…”

Section: Pollution Effectsmentioning

confidence: 99%

An Overview on Isotopic Divergences – Causes for instability of Tree-Ring Isotopes and Climate Correlations

Savard¹,

Daux²

2020

Preprint

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Abstract. Climatic reconstructions based on tree-ring isotopic series convey substantial information about past conditions prevailing in forested regions of the globe. However, in some cases, the relations between isotopic and climatic records appear unstable over time, generating the ‘isotopic divergences’. Former reviews have thoroughly discussed the divergence concept for tree-ring physical properties, but not for isotopes. Here we want to take stock of the isotopic divergence problem, express concerns and stimulate collaborative work for improving paleoclimatic reconstructions. There are five main causes for divergent parts in isotopic and climatic series. (1) Artefacts due to sampling and data treatment, relevant for dealing with long-series using sub-fossil stems. (2) Stand dynamics, including juvenile effects mostly occurring in the early part of tree-ring series. (3) Rise in atmospheric pCO2, which can directly influence the foliar behaviour. (4) Change of climate, which may modify the isotope-climate causal links. Finally (5), atmospheric pollution, which may alter leaf and root functions. Future paleoclimate research would benefit from interdisciplinary efforts designed to develop further process-based models integrating multi-proxy inputs, so to help identify causes of isotopic divergences and circumvent some of them in inverse applications.

show abstract

Response of gas-exchange characteristics and chlorophyll fluorescence to acute sulfur dioxide exposure in landscape plants

Cited by 24 publications

References 39 publications

Sulfate-mediated Drought Tolerance in Maize Involves Regulation at Physiological and Biochemical Levels

Sulfate-mediated Drought Tolerance in Maize Involves Regulation at Physiological and Biochemical Levels

An overview on isotopic divergences – causes for instability of tree-ring isotopes and climate correlations

An Overview on Isotopic Divergences – Causes for instability of Tree-Ring Isotopes and Climate Correlations

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