Photosynthetic induction is slower in young leaves than in mature leaves  in a tropical invader, Chromolaena odorata

Zhang, S.B.; Yin, Huajun; Deng, Qi

doi:10.32615/ps.2019.120

Cited by 3 publications

(3 citation statements)

References 59 publications

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“…A higher NPQ indicates an adaptive response of plants to increased dissipation of absorbed energy in heat form to protect their thylakoid membranes from photo damage and can compensate for the decrease in Y(II) and even cause a lowering in Y(NO) [ 48 ]. Leaves activate NPQ to dissipate excess excited energy in the form of heat and regulate the photosynthetic flow of electrons during the induction of photosynthesis, as well as to avoid the harmful formation of 1 O 2 , which can damage the photosynthetic apparatus [ 49 , 50 ]. Therefore, the leaf can maintain a balanced ROS level that ensures growth and prevents oxidative damage by adjusting the NPQ [ 47 , 51 , 52 , 53 ].…”

Section: Discussionmentioning

confidence: 99%

The Reactions of Photosynthetic Capacity and Plant Metabolites of Sedum hybridum L. in Response to Mild and Moderate Abiotic Stresses

Terletskaya

Seitimova

Kudrina

et al. 2022

Plants

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In this article, for the first time, an experimental study of the effect of mild and moderate osmotic stress, NaCl content and the effect of low positive temperature on photosynthetic activity and composition of metabolites of immature plants Sedum hybridum L. is reported. In this representative of the genus Sedum adapted to arid conditions and having the properties of a succulent, a change in photosynthetic activity and an increase in the level of protective metabolites in the shoots were revealed when exposed to mild and moderate stress factors. The results of this study can be used in work on the adaptation of succulent plants to arid conditions, environmental monitoring and work on the directed induction of valuable secondary metabolites in succulents to obtain new herbal medicines.

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Section: Discussionmentioning

confidence: 99%

The Reactions of Photosynthetic Capacity and Plant Metabolites of Sedum hybridum L. in Response to Mild and Moderate Abiotic Stresses

Terletskaya

Seitimova

Kudrina

et al. 2022

Plants

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“…Second, we ignored photosynthetic induction time and instead estimated the instantaneous photosynthetic rate using steady-state photosynthetic light response curves. Efficiency of photosynthesis may differ between steady-state and short-sunfleck conditions [49,56,58] due to stomatal [42,[100][101][102][103][104][105][106], mesophyll [42], and biochemical [102,104,107] limitations. In our dataset, however, understory leaves frequently received sunflecks during the day (Figure 9b).…”

Section: Morphological Acclimationmentioning

confidence: 99%

Photosynthetic and Morphological Acclimation to High and Low Light Environments in Petasites japonicus subsp. giganteus

Deguchi

Koyama

2020

Forests

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Within each species, leaf traits such as light-saturated photosynthetic rate or dark respiration rate acclimate to local light environment. Comparing only static physiological traits, however, may not be sufficient to evaluate the effects of such acclimation in the shade because the light environment changes diurnally. We investigated leaf photosynthetic and morphological acclimation for a perennial herb, butterbur (Petasites japonicus (Siebold et Zucc.) Maxim. subsp. giganteus (G.Nicholson) Kitam.) (Asteraceae), in both a well-lit clearing and a shaded understory of a temperate forest. Diurnal changes in light intensity incident on the leaves were also measured on a sunny day and an overcast day. Leaves in the clearing were more folded and upright, whereas leaves in the understory were flatter. Leaf mass per area (LMA) was approximately twofold higher in the clearing than in the understory, while light-saturated photosynthetic rate and dark respiration rate per unit mass of leaf were similar between the sites. Consequently, both light-saturated photosynthetic rate and dark respiration rate per unit area of leaf were approximately twofold higher in the clearing than in the understory, consistent with previous studies on different species. Using this experimental dataset, we performed a simulation in which sun and shade leaves were hypothetically exchanged to investigate whether such plasticity increased carbon gain at each local environment. As expected, in the clearing, the locally acclimated sun leaves gained more carbon than the hypothetically transferred shade leaves. By contrast, in the understory, the daily net carbon gain was similar between the simulated sun and shade leaves on the sunny day due to the frequent sunflecks. Lower LMA and lower photosynthetic capacity in the understory reduced leaf construction cost per area rather than maximizing net daily carbon gain. These results indicate that information on static photosynthetic parameters may not be sufficient to evaluate shade acclimation in forest understories.

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“…An increase in the values of Φ PSII and a decrease in the values of Φ NPQ is observed when the leaf gets older [ 87 ]. In young leaves, only a fraction of absorbed light energy is utilized in photochemistry via CO 2 assimilation, because carbon assimilation capacity is developed later than light capture ability [ 88 , 89 , 90 , 91 ], thus they have to activate NPQ to dissipate excessive excited energy as heat and regulate photosynthetic electron flow during photosynthetic induction [ 92 , 93 ] in order to avoid the harmful generation of 1 O 2 that can damage the photosynthetic apparatus [ 37 , 91 , 94 ]. Thus, YL, by regulating NPQ, can maintain a balanced ROS level that allows growth [ 69 , 70 , 85 , 86 , 95 ] and prevents their oxidative damage [ 22 ].…”

Section: Discussionmentioning

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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Photosynthetic induction is slower in young leaves than in mature leaves in a tropical invader, Chromolaena odorata

Cited by 3 publications

References 59 publications

The Reactions of Photosynthetic Capacity and Plant Metabolites of Sedum hybridum L. in Response to Mild and Moderate Abiotic Stresses

The Reactions of Photosynthetic Capacity and Plant Metabolites of Sedum hybridum L. in Response to Mild and Moderate Abiotic Stresses

Photosynthetic and Morphological Acclimation to High and Low Light Environments in Petasites japonicus subsp. giganteus

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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