Shading as a means of mitigating water deficit in seedlings of Campomanesia xanthocarpa (Mart.) O. Berg

Bartieres, Edinéia Messias Martins; Scalon, Silvana de Paula Quintão; Dresch, Daiane Mugnol; Cardoso, Edvânia A.S.; Jesus, Maílson Vieira; Pereira, Zefa Valdivina

doi:10.15835/nbha48111720

Cited by 8 publications

(5 citation statements)

References 9 publications

(9 reference statements)

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“…However, shading allowed a smaller loss of water by the substrate, reflected by the stomata opening for a longer period, and favoured greater assimilation of CO 2 (data not shown) similar to that observed by Bartieres et al (2020) for the same species and cultivation condition. Water potential of the leaves determines water fluxes in the soil-plant-atmosphere system and influences cell growth, photosynthesis, and productivity (Taiz et al, 2017).…”

Section: Discussionsupporting

confidence: 72%

“…Little information is available on water and light requirements of C. xanthocarpa seedlings, given that such information might assist horticulturists or farmers in their cultivation practices, minimizing seedlings mortality rates and, consequently, production costs, as well as favour management practice and success in recuperation projects of degraded areas. C. xanthocarpa although sensitive to water deficit, exhibits a potential for recovery of photosynthesis and growth characteristics with the resumption of irrigation when cultivated under 30 and 70% shading (Bartieres et al, 2020). These authors observed in their review that this species is classified as late secondary requiring shaded sites.…”

Section: Leaf Water Potentialmentioning

confidence: 99%

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Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings

et al. 2023

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The objective of this study was to evaluate the activity of antioxidant enzymes, the functioning of the photosystem II and quality of C. xanthocarpa seedlings cultivated under intermittent water deficit and shading levels and the influence of shading on recovery potential after suspension of the stress conditions. The seedlings were subjected to three levels of shading (0, 30, and 70%), six periods of evaluation (start: 0 days; 1st and 2nd photosynthesis zero: 1st and 2nd P0; 1st and 2nd recovery: 1stand 2nd REC; and END), and two forms of irrigation (control: periodically irrigated to maintain 70% substrate water retention capacity, and intermittent irrigation: suspension of irrigation). The plants subjected to intermittent irrigation conditions at 0% shading showed a reduction in water potential (Ψw) and potential quantum efficiency of photosystem II (Fv/Fm) and maximum efficiency of the photochemical process (Fv/F0) and an increase in basal quantum production of the non-photochemical processes (F0/Fm). Superoxide dismutase (SOD) activity was higher in the leaves than in the roots. The C. xanthocarpa is a species sensitive to water deficit but presents strategies to adapt to an environment under temporary water restriction, which are more temporary are most efficient under shading. The seedlings with water deficit at all levels of shading exhibited higher protective antioxidant activity and lower quality at 0% shading. The shading minimizes prevents permanent damage to the photosystem II and after the re-irrigation, the evaluated characteristics showed recovery with respect to the control group, except POD and SOD activities in the leaves.

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Section: Discussionsupporting

confidence: 72%

Section: Leaf Water Potentialmentioning

confidence: 99%

Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings

et al. 2023

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“…Furthermore, under conditions of low light availability, some species tend to invest a high proportion of photoassimilates in increasing leaf area to maximize the capture of available light (Bartieres et al, 2020), similar to the number of The largest root areas were found in the shaded seedlings (Figure 2C), which was related to water use efficiency. In this study environment, plants lose less water because of transpiration owing to a low water vapor pressure deficit (2.33 kPa).…”

Section: Resultsmentioning

confidence: 84%

Morphophysiology and quality of Alibertia edulis seedlings grown under light contrast and organic residue

Santos

Goelzer

Silva

et al. 2023

Rev. bras. eng. agríc. ambient.

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Organic residue in the substrate and the availability of light influence the production of high-quality seedlings for ex situ cultivation of native forest species. This study aimed to evaluate the effect of doses of chicken manure incorporated in the soil and shading levels on the morphophysiological responses and quality of Alibertia edulis (Rich.) A. Rich seedlings. Five doses of chicken manure (CM) were tested, 0.00, 2.08, 4.16, 6.24, and 8.32 g CM kg-1 soil, under two shade conditions, 0% (full sun) and 50% shading. At 215 days after transplanting, the maximum height obtained for A. edulis was 47.35 cm with 5.64 g CM kg-1 soil under 50% shade. Shaded seedlings had a higher number of leaves. The maximum leaf and root areas were 796.64 and 118.83 cm2 with 5.32 and 4.21 g CM kg-1 soil, respectively, both under 50% shade. Seedlings in 0% shade had lower physiological indices. Shading levels did not affect stomatal limitation, but CM contributed to physiological efficiency. Shoot biomass was higher under 50% shade with higher CM doses. The highest quality indexes occurred with 3.98 and 6.28 g kg-1 CM under 0 and 50% shade, respectively. A. edulis seedlings responded positively to the addition of CM to the soil and presented plasticity under contrasting light conditions. A. edulis seedlings produced under 50% shading with the addition of 6.24 g CM kg-1 soil presented high morphophysiological and seedling quality indicators. The addition of 4.32 g CM kg-1 soil contributed to high seedling quality under full sun conditions.

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“…Similarly, to that observed for O. arborea, seedlings of Campomanesia xanthocarpa Cambess. showed reduction of A, gs and A/C i , when submitted to water restriction, however, shading minimized this reduction (Bartieres et al 2020), evidencing the mitigating effect of shading on the stress caused by water restriction. We emphasize that when comparing transpiration and stomatal conductance in Pterogyne nitens Tul., Myroxylon peruiferum L. f. and Aspidosperma polyneuron Müll.Arg.…”

Section: Discussionmentioning

confidence: 89%

Does shading mitigate water restriction in Ormosia arborea seedlings?

et al. 2022

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This study aimed to evaluate the potential of shading in reducing the stressful effect of water restriction on photosynthetic and antioxidant metabolism, favoring the growth of Ormosia arborea seedlings and the recovery metabolic. The shadings levels studied were: 0, 30 and 70%. Two water regimes were implemented: control, in which the plants were irrigated at 75% of soil water retention capacity and water restriction, in which the irrigation was suspended until the photosynthetic rate reached values close to zero (P0), period at which the seedlings were re-irrigated. There were two evaluation periods: P0 and recovery. We observed that water restriction reduced photosynthetic metabolism, growth and quality of O. arborea seedlings by increasing the activity of antioxidant enzymes. The seedlings present higher quality index, stomatal conductance, intrinsic carboxylation efficiency and transpiration when cultivated under 70% shading in recovery. The stressful effect of water restriction was mitigated by the shading of 70%, where the seedlings were able to recover, resuming their photosynthetic metabolism and quality after resumption of irrigation. In addition, 0% shading is not indicated for this species.

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Shading as a means of mitigating water deficit in seedlings of Campomanesia xanthocarpa (Mart.) O. Berg

Cited by 8 publications

References 9 publications

Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings

Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings

Morphophysiology and quality of Alibertia edulis seedlings grown under light contrast and organic residue

Does shading mitigate water restriction in Ormosia arborea seedlings?

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