Water-deficit priming of papaya reduces high-light stress through oxidation avoidance rather than anti-oxidant activity

Vincent, Christopher; Schaffer, Bruce; Rowland, Diane

doi:10.1016/j.envexpbot.2018.04.016

Cited by 10 publications

(6 citation statements)

References 56 publications

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“…Additionally, our analysis of the biophysical OJIP variables calculated from the transient rise of chlorophyll fluorescence indicates that, in VvmybA1 leaves, the photosynthetic machinery adapts to reduced irradiance in a mesophyll partly shielded by additional anthocyanins. The slight decrease in ΦPo results from a reduction in Fm, which was unexpected, as other species typically exhibit higher Fm in shade acclimation to increase absorbance [46]. The lack of absorbance-enhancing acclimation is supported by the unchanged γRC, which is related to antenna size.…”

Section: Discussionmentioning

confidence: 92%

Influence of Anthocyanin Expression on the Performance of Photosynthesis in Sweet Orange, Citrus sinensis (L.) Osbeck

Cheaib,

Mahmoud,

Vincent

et al. 2023

Plants

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Anthocyanins are a class of natural pigments that accumulate transiently or permanently in plant tissues, often in response to abiotic and biotic stresses. They play a photoprotective role by attenuating the irradiance incident on the photochemical apparatus and quenching oxyradicals through their powerful anti-oxidative function. The objective of the current study is to understand the impact of introducing Vitis vinifera mybA1 (VvmybA1) in ‘Hamlin’ sweet orange trees on various aspects, including photosynthetic performance, pigment composition, and gene expression related to photosynthesis and light harvesting. We describe the relationship between anthocyanin accumulation and photosynthetic measurements in genetically modified ‘Hamlin’ sweet orange trees expressing the grapevine-derived Vitis vinifera mybA1 (VvmybA1). The juvenile leaves of transgenic plants displayed an intense purple color compared to the mature leaves, and microscopic visualization showed anthocyanin accumulation primarily in the leaf epidermal cells. Under optimal growth conditions, there were no significant differences in leaf gas exchange variables, suggesting normal photosynthetic performance. The chlorophyll fluorescence maximum quantum yield of PSII was slightly reduced in VvmybA1 transgenic leaves compared to the performance of the control leaves, while the total performance index per absorbance remained unaffected. Comparison of the chlorophyll and carotenoid pigment contents revealed that chlorophyllide a and carotenoid pigments, including trans-neoxanthin, trans-violaxanthin, cis-violaxanthin, zeaxanthin, antheraxanthin, and total xanthophylls were enhanced in VvmybA1 transgenic leaves. Although there were no significant changes in the rates of the gas exchange parameters, we recorded a high relative expression of the ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit (RuBP) and rubisco activase (RCA) in the mature leaves of transgenic plants, indicating activation of Rubisco. Our findings confirm an efficient photoacclimation of the photosynthetic apparatus, allowing the transgenic line to maintain a photosynthetic performance similar to that of the wild type.

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Section: Discussionmentioning

confidence: 92%

Influence of Anthocyanin Expression on the Performance of Photosynthesis in Sweet Orange, Citrus sinensis (L.) Osbeck

Cheaib,

Mahmoud,

Vincent

et al. 2023

Plants

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“…Drought stress can severely affect crop plant development and yield by inhibiting growth and photosynthetic activity, inducing ROS production and stomatal closure, as well as inducing root growth as a counter-response to limited water supply [203][204][205]. Acclimating plants in water-deficit environments can prevent yield loss to drought by inducing changes in root architecture, water usage efficiency, photosynthetic adjustments, as well as the production of osmotic and antioxidant factors [206]. In this context, pretreatment with drought stress as a priming approach could be efficient for the development of drought memory towards drought tolerance.…”

Section: Droughtmentioning

confidence: 99%

“…This phenomenon extends to priming responses and hereditary traits as well. Specifically, drought priming has generated responses that, in some cases, are unlikely to provide any benefit or could even be detrimental to tolerance against other forms of stresses, as exemplified by the development of deeper roots in peanut [262,263] or increased water consumption in potato [264] in response to priming, which may not necessarily enhance tolerance to salinity or cold stress [206]. Morphological alterations may sacrifice other responses, such as water conservation to maintain carbon fixation, or plant growth [265].…”

Section: Stress Memory Trade-offsmentioning

confidence: 99%

“…Alternative response mechanisms have also been reported between cross-and cistolerance adaptation. For example, acclimating plants in water-deficit environments can induce a plant response to high light intensity through oxidation avoidance, rather than antioxidant activity occurring during shade-to-light acclimation [206]. Hence, to create more resilient plants to the effects of climate change, it is necessary to identify breeding targets that are involved in balancing a plant's response to various stresses while maintaining growth fitness [268][269][270].…”

Section: Stress Memory Trade-offsmentioning

confidence: 99%

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Echoes of a Stressful Past: Abiotic Stress Memory in Crop Plants towards Enhanced Adaptation

Lagiotis,

Madesis,

Stavridou

2023

Agriculture

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Plants can develop stress memory as a response to various abiotic stresses, but the underlying mechanisms are not yet fully understood. Most of the knowledge concerning the mechanisms of stress memory development and inheritance in plants is primarily based on research in the model plant Arabidopsis. While shared mechanisms exist across plant species, it is crucial to expand our understanding of epigenetic regulation in crops. Stress priming, or prior exposure to mild stress, can enhance a plant’s adaptation to future stress events and the development of stress memory. During stress priming, plants undergo physiological, biochemical, molecular, and epigenetic changes that can be transient or maintained throughout their lifespan, and in some cases, these changes can also be inherited by the offspring. In this review, we present the current state of knowledge on the development of priming-induced stress memory in agronomically important crops towards stress resilience. The most prominent abiotic stresses, namely, heat, cold, salt, drought, and waterlogging, are highlighted in relation to stress cis-/trans-priming and memory development at the intra-, inter-, and transgenerational levels. The cost for developing stress memory in plants along with the duration of these memory imprints and stress memory fading are also discussed. This review is particularly important in the era of climate change, which necessitates the development of agricultural sustainability strategies.

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“…In this sense, Girón et al (2021) pointed out that high cuticular wax contents contribute to greater tolerance to water deficit stress. Vincent et al (2018) found a correlation between tolerance to water deficit and light stress; adapting plants to water deficits helps mitigate radiation excesses. Peçanha et al (2017) indicated that high electrical conductivity in soil affects gas exchange rates, reducing plant growth.…”

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confidence: 96%

Morphological diversity of the UN Cotové papaya (Carica papaya L.) variety grown under tropical dry forest conditions

Loaiza Ruiz,

Otalvaro Gutiérrez,

Cartagena Valenzuela

et al. 2023

Rev. Fac. Nac. Agron. Medellín

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This work aimed to describe the morphological diversity of the UN Cotové papaya variety to identify outstanding plants that can be used to obtain a new local cultivar. 18 individuals were selected, and the multivariate non-hierarchical cluster technique analyzed data. A Polynomial regression model was carried out to describe growth as a function of growing degree days. The ANOVA identified significant differences between plants for most morphological variables. The Pearson correlation showed linear dependence; all the variables had a high correlation (higher than 0.82) with plant height. The Hopkins and Gap statistic determined two clusterings: Gropu "D" with higher development and group "A" with less development for all parameters. Second-order polynomial model were the best fit for the plant height, and third-order models were the best fit for the others. The non-linear functional models were not significant for the evaluated variables, presenting "Lack of Fit" values greater than 0.05. The results provided information for selecting plants with outstanding characteristics that can be used in the papaya breeding program.

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Water-deficit priming of papaya reduces high-light stress through oxidation avoidance rather than anti-oxidant activity

Cited by 10 publications

References 56 publications

Influence of Anthocyanin Expression on the Performance of Photosynthesis in Sweet Orange, Citrus sinensis (L.) Osbeck

Influence of Anthocyanin Expression on the Performance of Photosynthesis in Sweet Orange, Citrus sinensis (L.) Osbeck

Echoes of a Stressful Past: Abiotic Stress Memory in Crop Plants towards Enhanced Adaptation

Morphological diversity of the UN Cotové papaya (Carica papaya L.) variety grown under tropical dry forest conditions

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