Gaseous NO2 effects on stomatal behavior, photosynthesis and respiration of hybrid poplar leaves

Hu, Yingmo; Bellaloui, Nacer; Tigabu, Mulualem; Wang, Jinghong; Diao, Jian; Wang, Ke; Yang, Rui; Guang-yu, Sun

doi:10.1007/s11738-014-1749-8

Cited by 30 publications

(21 citation statements)

References 37 publications

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“…SO2 induces closure through guard cell mortality (Ooi et al, 2019). As seen in controlled experiments, NOx can have species-specific positive or negative effects on trees, opening of stomata, stimulating CO2 assimilation and increasing biomass when beneficial (Siegwolf et al, 2001), and reducing g, A, or the root to shoot ratios when detrimental (Siegwolf et al, 2001;Hu et al, 2015;and references therein).…”

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.

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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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“…In addition to transferring electrons to FNR to promote the synthesis of ATP and NADPH, nitrogen metabolism, photorespiration, and ROS scavenging processes can also act as electron receptors for Fd. Some studies have found that these metabolic processes play a competitive role in the synthesis of NADPH, leading to a reduction in plant photosynthetic rate (Hu et al, 2014;Hu et al, 2015), but the absence of receptors for excess electrons in Fd can lead to the production of ROS around PSI under stress (Asada, 2006). Therefore, other electronic utilization pathways of Fd are also an important protective mechanism.…”

Section: Response Of Photoprotective Mechanism and Related Proteins Omentioning

confidence: 99%

Photosynthetic Function and the Photoprotective Mechanism of Leaves of <em>Morus alba L.</em> Seedlings under NaCl and NaHCO3 Stress Revealed by Proteomics

Zhang¹,

Xu²,

X³

et al. 2019

Preprint

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Photosynthetic function, photoprotection, and the response of related proteomics of mulberry (Morus alba L.) seedling leaves under NaCl and NaHCO3 stress with the same Na+ concentration (100 mmol•L-1) were studied by using photosynthetic gas exchange and chlorophyll fluorescence techniques combined with TMT proteomics. The results showed that NaCl stress had no significant effect on photosystem II (PSII) activity in mulberry seedling leaves, and the expressions of the related proteins, OEE3-1 and PPD4, of the PSII oxygen-evolving complex (OEC) and the antenna proteins, CP24 10A, CP26, and CP29, of LHCII in the leaves also increased to varying degrees. The photosystem I (PSI) activity in the leaves of mulberry seedling also increased, and the expressions of some proteins, PsaF, PsaG, PsaH, PsaL, PsaN, and Ycf4, in PSI increased significantly under NaCl stress. Under NaHCO3 stress, the activity of PSII and PSI and the expression of their protein complexes and the electron transfer-related proteins significantly decreased. NaCl stress had little effect on RuBP regeneration during dark reaction in the leaves and the expressions of glucose synthesis related proteins and net photosynthetic rate (Pn) did not decrease significantly. The leaves could adapt to NaCl stress by reducing stomatal conductance (Gs) to increase water use efficiency (WUE). Under NaHCO3 stress, the expression of dark reaction-related proteins was mostly down-regulated, and Gs was significantly reduced, which indicated that non-stomatal factors were important reasons for the significant inhibition of carbon assimilation. In the photoprotective mechanism under NaCl stress, the expression of cyclic electron flow (CEF) related proteins, ndhH, ndhI, ndhK, and ndhM, involved in NAD(P)H dehydrogenase (NDH) and the key enzyme of the xanthophyll cycle, violaxanthin de-epoxidase (VDE) were up-regulated. In addition, the ratio of xanthophyll cycle components (A+Z)/(V+A+Z) was increased. The expressions of proteins FTR and Fd-NiR, which are related to Fd-dependent ROS metabolism and nitrogen metabolism, were also significant up-regulated under NaCl stress, which can effectively reduce the electronic pressure on Fd. Under NaHCO3 stress, the expressions of CEF-related proteins, VDE, ZE, FTR, Fd-NiR, Fd-GOGAT, SGAT, and GGAT, were significant down-regulated, and the photoprotective mechanism, like the xanthophyll cycle, CEF, and photorespiration, might be damaged, resulting in the inhibition of PSII activity and carbon assimilation in leaves of mulberry seedling under NaHCO3 stress.

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“…Therefore, Chl content and structure are also important indicators of nitrogen status in plant tissues [10]. Hu found that inhibition of photosynthesis in poplar leaves may be responsible for the suppression of growth by NO 2 [11] and another study reported that NO 2 caused visible damage to wheat leaves and inhibited photosynthesis and respiration [12].…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Capacity, Stomatal Behavior and Chloroplast Ultrastructure in Leaves of the Endangered Plant Carpinus putoensis W.C.Cheng during Gaseous NO2 Exposure and after Recovery

Sheng

Zhu

2018

Forests

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Foliar uptake of gaseous NO2 mainly occurs through the stomata and disrupts normal plant growth, but no detailed reports about the physiological responses of plants exposed to NO2 are available. In this study, to study leaf physicochemical responses, stomatal characteristics and chloroplast structure, we observed the leaves of Carpinus putoensis W.C.Cheng after exposure to NO2 (6 μL/L) for five time periods (0, 1, 6, 24, and 72 h) and after 30 days of recovery following NO2 exposure. Our results showed that short-duration exposure to a high concentration of NO2 had significant negative impacts (p < 0.05) on the chlorophyll content, photosynthesis and chloroplast-related physicochemical processes of C. putoensis leaves; with the exception of one hour of NO2 exposure, which was helpful for plant physiological responses. Moreover, NO2 exposure significantly increased the thickness of the palisade/spongy tissue and caused swelling of the thylakoids within the chloroplasts; this thylakoid swelling could be reversed by removing the pollutant from the air flow. Restoration of unpolluted air alleviated the toxic effects of NO2, as indicated by an increased chlorophyll content, net photosynthesis, and PSII maximum quantum yield. These results could support the development of a treatment for roadside trees that are exposed to NO2 as a major road pollutant.

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Gaseous NO2 effects on stomatal behavior, photosynthesis and respiration of hybrid poplar leaves

Cited by 30 publications

References 37 publications

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

Photosynthetic Function and the Photoprotective Mechanism of Leaves of <em>Morus alba L.</em> Seedlings under NaCl and NaHCO3 Stress Revealed by Proteomics

Photosynthetic Capacity, Stomatal Behavior and Chloroplast Ultrastructure in Leaves of the Endangered Plant Carpinus putoensis W.C.Cheng during Gaseous NO2 Exposure and after Recovery

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