Effect of drought on growth, photosynthesis and total antioxidant capacity of the saharan plant Oudeneya africana

Talbi, Sihem; Rojas, José Antonio; Sahrawy, Mariam; Rodríguez‐Serrano, María; Cárdenas, Katiuska E.; Debouba, Mohamed; Sandalio, Luisa M.

doi:10.1016/j.envexpbot.2020.104099

Cited by 84 publications

(50 citation statements)

References 73 publications

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“…Date represent the mean ± SD (n = 7), statistically significant differences between B73 and doi57 are indicated by asterisks. * P < 0.05, df = 12 induced oxidative damage (Li et al 2019a;Talbi et al 2020). The doi57 had higher scavenging capacity for oxygen free radicals (•OH and DPPH) than did B73, especially under drought conditions (Fig.…”

Section: Discussionmentioning

confidence: 94%

Flavonoids improve drought tolerance of maize seedlings by regulating the homeostasis of reactive oxygen species

Fan

Sun

et al. 2021

Plant Soil

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Background and aims As drought threatens the yield and quality of maize (Zea mays L.), it is important to dissect the molecular basis of maize drought tolerance. Flavonoids, participate in the scavenging of oxygen free radicals and alleviate stress-induced oxidative damages. This study aims to dissect the function of flavonoids in the improvement of maize drought tolerance. Methods Using far-infrared imaging screening, we previously isolated a drought overly insensitivity (doi) mutant from an ethyl methanesulfonate (EMS)-mutagenized maize library and designated it as doi57. In this study, we performed a physiological characterization and transcriptome profiling of doi57 in comparison to corresponding wild-type B73 under drought stress. Results Under drought stress, doi57 seedlings displayed lower leaf-surface temperature (LST), faster water loss, and better performance in growth than B73. Transcriptome analysis reveals that key genes involved in flavonoid biosynthesis are enriched among differentially expressed genes in doi57. In line with these results, more flavonols and less hydrogen peroxide (H2O2) were accumulated in guard cells of doi57 than in those of B73 with the decrease of soil water content (SWC). Moreover, the capacity determined from doi57 seedling extracts to scavenge oxygen free radicals was more effective than that of B73 under the drought treatment. Additionally, doi57 seedlings had higher photosynthetic rates, stomatal conductance, transpiration rates, and water use efficiency than B73 exposed to drought stress, resulting in high biomass and greater root/shoot ratios in doi57 mutant plants. Conclusion Flavonoids may facilitate maize seedling drought tolerance by lowering drought-induced oxidative damage as well regulating stomatal movement.

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Section: Discussionmentioning

confidence: 94%

Flavonoids improve drought tolerance of maize seedlings by regulating the homeostasis of reactive oxygen species

Fan

Sun

et al. 2021

Plant Soil

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“…In the native range where soil pathogens are common, the costs of increased root flavonoid exudation are likely larger than in the introduced range where soil fungal pathogens are rare and so there may be directional selection on increased root flavonoid exudation. Third, flavonoids have many functions other than AM fungi stimulation including UV and drought tolerance [63,64], thus the introduced populations of invasive plants may produce more flavonoids to adapt to novel abiotic environments. For example, a recent study found leaf flavonoids contents in Triadica introduced ranges were closely related with UV and solar radiation [65].…”

Section: Discussionmentioning

confidence: 99%

“…In this scenario, increased release of flavonoids by roots reflects generally higher levels of flavonoids produced for other functions. Because a number of biotic and abiotic factors could affect root exudate chemicals, future work is needed to further reveal mechanisms underlying changes in root exudate chemicals in different plant populations [64].…”

Section: Discussionmentioning

confidence: 99%

Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant

et al. 2021

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Many invasive plants have enhanced mutualistic arbuscular mycorrhizal (AM) fungal associations, however, mechanisms underlying differences in AM fungal associations between introduced and native populations of invasive plants have not been explored. Here we test the hypothesis that variation in root exudate chemicals in invasive populations affects AM fungal colonization and then impacts plant performance. We examined flavonoids (quercetin and quercitrin) in root exudates of native and introduced populations of the invasive plant Triadica sebifera and tested their effects on AM fungi and plant performance. We found that plants from introduced populations had higher concentrations of quercetin in root exudates, greater AM fungal colonization and higher biomass. Applying root exudates more strongly increased AM fungal colonization of target plants and AM fungal spore germination when exudate donors were from introduced populations. The role of root exudate chemicals was further confirmed by decreased AM fungal colonization when activated charcoal was added into soil. Moreover, addition of quercetin into soil increased AM fungal colonization, indicating quercetin might be a key chemical signal stimulating AM fungal associations. Together these results suggest genetic differences in root exudate flavonoids play an important role in enhancing AM fungal associations and invasive plants’ performance, thus considering root exudate chemicals is critical to unveiling mechanisms governing shifting plant-soil microbe interactions during plant invasions.

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“…Drought stress enhances flavonoid accumulation [ 55 , 56 ], which, in turn, can reduce ROS accumulation, improving the antioxidant capacity and, consequently, resulting in drought acclimation [ 57 , 58 , 59 ]. Flavonoid production is one of the strategies used by native species living in extreme environments to avoid the oxidative damage caused by drought [ 118 , 119 ].…”

Section: Discussionmentioning

confidence: 99%

“…Their antioxidant properties include reactivity to a variety of ROS [ 47 , 48 , 49 , 50 , 51 , 52 ], as well as metal chelating [ 53 , 54 ]. Drought stress enhances flavonoid accumulation [ 55 , 56 ], which, in turn, improves antioxidant capacity by reducing ROS and improving drought tolerance [ 57 , 58 , 59 ].…”

Section: Introductionmentioning

confidence: 99%

Leaf Age-Dependent Photosystem II Photochemistry and Oxidative Stress Responses to Drought Stress in Arabidopsis thaliana Are Modulated by Flavonoid Accumulation

Sperdouli

Moustaka

Ouzounidou³

et al. 2021

Molecules

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We investigated flavonoid accumulation and lipid peroxidation in young leaves (YL) and mature leaves (ML) of Arabidopsis thaliana plants, whose watering stopped 24 h before sampling, characterized as onset of drought stress (OnDS), six days before sampling, characterized as mild drought stress (MiDS), and ten days before sampling, characterized as moderate drought stress (MoDS). The response to drought stress (DS) of photosystem II (PSII) photochemistry, in both leaf types, was evaluated by estimating the allocation of absorbed light to photochemistry (ΦPSII), to heat dissipation by regulated non-photochemical energy loss (ΦNPQ) and to non-regulated energy dissipated in PSII (ΦNO). Young leaves were better protected at MoDS than ML leaves, by having higher concentration of flavonoids that promote acclimation of YL PSII photochemistry to MoDS, showing lower lipid peroxidation and excitation pressure (1 − qp). Young leaves at MoDS possessed lower 1 − qp values and lower excess excitation energy (EXC), not only compared to MoDS ML, but even to MiDS YL. They also possessed a higher capacity to maintain low ΦNO, suggesting a lower singlet oxygen (1O2) generation. Our results highlight that leaves of different developmental stage may display different responses to DS, due to differential accumulation of metabolites, and imply that PSII photochemistry in Arabidopsis thaliana may not show a dose dependent DS response.

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Effect of drought on growth, photosynthesis and total antioxidant capacity of the saharan plant Oudeneya africana

Cited by 84 publications

References 73 publications

Flavonoids improve drought tolerance of maize seedlings by regulating the homeostasis of reactive oxygen species

Flavonoids improve drought tolerance of maize seedlings by regulating the homeostasis of reactive oxygen species

Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant

Leaf Age-Dependent Photosystem II Photochemistry and Oxidative Stress Responses to Drought Stress in Arabidopsis thaliana Are Modulated by Flavonoid Accumulation

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