Contribution of ABA metabolism and ROS generation to sugar starvation-induced senescence of rice leaves

Asad, Muhmmad Asad Ullah; Wang, Fubiao; Ye, Yu; Guan, Xianyue; Zhou, Lujian; Han, Zhanyu; Pan, Gang; Cheng, Fangmin

doi:10.1007/s10725-021-00718-4

Cited by 14 publications

(9 citation statements)

References 44 publications

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“…Zakari et al also suggested that a lower sugar content could be related to ROS generation and leaf-induced senescence, supporting the results obtained in this study after harmaline treatment. This is also consistent with the results obtained by Asad et al, where decreasing concentrations of soluble sugar were related to an acceleration of leaf-induced senescence, together with an increase in ABA concentrations and ROS generation.…”

Section: Discussionsupporting

confidence: 93%

Application of Indole-Alkaloid Harmaline Induces Physical Damage to Photosystem II Antenna Complexes in Adult Plants of Arabidopsis thaliana (L.) Heynh

Álvarez-Rodríguez

Alvite

Reigosa

et al. 2023

J. Agric. Food Chem.

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Finding herbicides with new and multiple modes of action is a solution to stop the increase in resistant weed species. Harmaline, a natural alkaloid with proven phytotoxic potential, was tested on Arabidopsis adult plants by watering and spraying; watering resulted as the more effective treatment. Harmaline altered several photosynthetic parameters, reducing the efficiency of the light- (ΦII) and dark-adapted (Fv /Fm ) PSII, suggesting physical damages in photosystem II, although dissipation of the energy in excess under the form of heat was not compromised as demonstrated by the significant increase in ΦNPQ. Metabolomic alterations, such as osmoprotectant accumulation and reduction in sugars’ content, also indicate a reduction of photosynthetic efficiency and suggest early senescence and water status alteration induced by harmaline. Data suggest that harmaline might be considered a new phytotoxic molecule interesting for further studies.

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Section: Discussionsupporting

confidence: 93%

Application of Indole-Alkaloid Harmaline Induces Physical Damage to Photosystem II Antenna Complexes in Adult Plants of Arabidopsis thaliana (L.) Heynh

Álvarez-Rodríguez

Alvite

Reigosa

et al. 2023

J. Agric. Food Chem.

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“…Previous studies have demonstrated that ROS are involved in the regulation of plant senescence [ 35 , 36 , 37 ], and excess ROS content leads to oxidative damage to lipids, proteins, and DNA during leaf senescence [ 38 , 39 ]. In this paper, the quantification and histochemical analysis of H 2 O 2 and O 2 − showed that obvious ROS build-up was observed in senescing cucumber leaves induced by darkness or age, which was lower in ASMT -overexpressing and melatonin-treated cucumber leaves ( Figure 3 and Figure 9 ), and thus, the lower lipid peroxidation product MDA content was also measured in ASMT -overexpressing or MT-treated cucumber leaves, which was in accordance with the results of Tan [ 11 ] in Chinese cabbage, and melatonin was thought to be an antioxidant [ 39 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Jing

Liu

Wang

et al. 2022

IJMS

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Melatonin (MT), as a signaling molecule, plays a vital role in regulating leaf senescence in plants. This study aimed to verify the antioxidant roles of MT in delaying dark- or age-induced leaf senescence of cucumber plants. The results showed that endogenous MT responds to darkness and overexpression of CsASMT, the key gene of MT synthesis, and delays leaf senescence stimulated by darkness, as manifested by significantly lower malonaldehyde (MDA) and reactive oxygen species (ROS) contents as well as higher activities and gene expression of antioxidant enzymes compared to the control. Moreover, MT suppressed both age- or dark-induced leaf senescence of cucumber, as evidenced by a decrease in senescence-related gene SAG20 and cell-death-related gene PDCD expression and ROS content and an increase in antioxidant capacity and chlorophyll biosynthesis compared with the H2O-treated seedlings. Meanwhile, the suppression of age-induced leaf senescence by melatonin was also reflected by the reduction in abscisic acid (ABA) biosynthesis and signaling pathways as well as the promotion of auxin (IAA) biosynthesis and signaling pathways in cucumber plants in the solar greenhouse. Combining the results of the two separate experiments, we demonstrated that MT acts as a powerful antioxidant to alleviate leaf senescence by activating the antioxidant system and IAA synthesis and signaling while inhibiting ABA synthesis and signaling in cucumber plants.

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“…Our results show that sugar accumulation was higher in all HL plants (Figure 3), while ABA levels were lower in HL plants (Figure 4). Studies on rice (Oryza sativa) show that sugar starvation increases concentrations of ABA and ROS, inducing programmed cell death and early senescence [67]. In tomato plants overexpressing HXK, ABA concentrations spiked and induced early senescence [68].…”

Section: Discussionmentioning

confidence: 99%

Barley Genotypes Vary in Stomatal Responsiveness to Light and CO2 Conditions

Hunt

Fuksa

Klem

et al. 2021

Plants

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Changes in stomatal conductance and density allow plants to acclimate to changing environmental conditions. In the present paper, the influence of atmospheric CO2 concentration and light intensity on stomata were investigated for two barley genotypes—Barke and Bojos, differing in their sensitivity to oxidative stress and phenolic acid profiles. A novel approach for stomatal density analysis was used—a pair of convolution neural networks were developed to automatically identify and count stomata on epidermal micrographs. Stomatal density in barley was influenced by genotype, as well as by light and CO2 conditions. Low CO2 conditions resulted in increased stomatal density, although differences between ambient and elevated CO2 were not significant. High light intensity increased stomatal density compared to low light intensity in both barley varieties and all CO2 treatments. Changes in stomatal conductance were also measured alongside the accumulation of pentoses, hexoses, disaccharides, and abscisic acid detected by liquid chromatography coupled with mass spectrometry. High light increased the accumulation of all sugars and reduced abscisic acid levels. Abscisic acid was influenced by all factors—light, CO2, and genotype—in combination. Differences were discovered between the two barley varieties: oxidative stress sensitive Barke demonstrated higher stomatal density, but lower conductance and better water use efficiency (WUE) than oxidative stress resistant Bojos at saturating light intensity. Barke also showed greater variability between treatments in measurements of stomatal density, sugar accumulation, and abscisic levels, implying that it may be more responsive to environmental drivers influencing water relations in the plant.

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Contribution of ABA metabolism and ROS generation to sugar starvation-induced senescence of rice leaves

Cited by 14 publications

References 44 publications

Application of Indole-Alkaloid Harmaline Induces Physical Damage to Photosystem II Antenna Complexes in Adult Plants of Arabidopsis thaliana (L.) Heynh

Application of Indole-Alkaloid Harmaline Induces Physical Damage to Photosystem II Antenna Complexes in Adult Plants of Arabidopsis thaliana (L.) Heynh

Melatonin Positively Regulates Both Dark- and Age-Induced Leaf Senescence by Reducing ROS Accumulation and Modulating Abscisic Acid and Auxin Biosynthesis in Cucumber Plants

Barley Genotypes Vary in Stomatal Responsiveness to Light and CO2 Conditions

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