Gas Exchanges and Antioxidant Activity in &amp;lt;i&amp;gt;Copaifera langsdorffii&amp;lt;/i&amp;gt; Desf. Seedlings after Flooding

Rosa, Derek Brito Chaim Jardim; Scalon, Silvana de Paula Quintão; Cremon, Thais; Dresch, Daiane Mugnol

doi:10.4236/ajps.2018.95075

Cited by 8 publications

(8 citation statements)

References 33 publications

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“…For (F 0 /F M ) the results are similar to those observed for other species considered tolerant to temporary water stress and with recovery potential after stress suspension. Thus, Reis et al (2020) for Calophyllum brasiliense under water deficit and Rosa et al (2018) for C. langsdorffii under flooding (during 42 days), observed similar results.…”

Section: Discussionsupporting

confidence: 63%

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Do Hydro-Retainer Polymers Attenuate Damage from Water Fluctuations in Leaf Metabolism and the Quality of Cedrela odorata Seedlings?

Silva¹

2021

IJAB

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Water stress, caused by excess or lower of water, can negatively affect leaf metabolism and seedling growth and prevent it from developing its maximum genetic potential. In this sense, it is necessary to use as that can mitigate these deleterious effects on plants at their initial phase of growth. The aim of this work was to evaluate the effect of hydrogel in the mitigation of water stress (deficit and flooding) on photosynthetic metabolism and growth characteristics of C. odorata seedlings, and also evaluate their recovery potential after the resumption of irrigation. The characteristics of photosynthetic metabolism, growth and quality of C. odorata seedlings showed a reduction caused by water fluctuations, indicating sensitivity to these conditions, although photosynthesis photochemistry was affected to a lower extent. The addition of the hydro-retainer polymer contributed little to the biochemical and photochemical indicators of photosynthesis and seedling quality, a fact that directs us to reject our hypothesis that its use promotes mitigation of damage to the photosynthetic apparatus and to the growth. Cedrela odorata is sensitive to water variations in the soil, but recovers the photosynthetic metabolism and quality of the seedlings once the stressful water condition is suspended. The application of the hydro-retainer polymer mitigated, but the seedlings recovered regardless of their presence. © 2021 Friends Science Publishers

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Section: Discussionsupporting

confidence: 63%

“…2c). An increase in this characteristic in plants cultivated with and without H, in the two phases of water fluctuations, was considered an indication of stress, because the values were higher than the range of 0.14 to 0.20 (Rohácek 2002;Rosa et al 2018). This suggests stressful conditions.…”

Section: Discussionmentioning

confidence: 99%

Do Hydro-Retainer Polymers Attenuate Damage from Water Fluctuations in Leaf Metabolism and the Quality of Cedrela odorata Seedlings?

Silva¹

2021

IJAB

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“…Increment in F o /F m values due to water stress was also observed in Copaifera langsdorff seedlings (Rosa et al, 2018).…”

Section: Resultssupporting

confidence: 52%

Physiological Response of Conventional and Transgenic Maize to Water Stress

Lemos

Pereira

Matos

et al. 2020

RBMS

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Genetic modifications of plants can affect their ability to use environmental resources. It is known that the anthropic action has caused global climate changes, such as increases in temperature and drought. In view of this, the objective of this study was to evaluate if the addition of the Bt gene influences the physiological performance of isogenic maize hybrids grown under water stress and optimal conditions. Three Bt and non-Bt maize hybrids (Agromen 30A95, Dow 2B707 and BG 7049Y) were cultivated in soil with moisture content at 60% (water stress) and 100% of the field capacity (FC). Among the hybrids, the 30A95 presented greater variation between Bt and non-Bt hybrids in regard to physiological variables. The addition of the Bt gene practically had no impact on the photosynthetic performance of the 2B707 and BG7049 hybrids. The presence of the Bt gene increased the sensitivity to water stress in the hybrids, with reduction of maximal fluorescence and chlorophyll content in the plants. Regardless of the genetic factor (Bt or non-Bt), water stress reduced transpiration, stomatal conductance, photosynthetic rate, and maximum quantum yield of the PSII in maize plants. It was concluded that the presence of the Bt gene in maize indicates a reduction in the photosynthetic potential of the plant grown under water stress.

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“…In studies with generalist species, which are widely distributed and abundant owing to their plasticity, regarding habitat specificity, POD and SOD activities have been evaluated. C. langsdorffii seedlings showed higher SOD activity in the leaves than in the roots, which was observed in the seedlings under intermittent irrigation, the highest values in the leaves were detected under 100% luminosity (Rosa et al, 2017). For Schinus terebinthifolius Raddi seedlings, the SOD and POD activities were higher in both leaves and roots because of water deficit; the enzymatic activities decreased after rehydration (Nunes et al, 2017).…”

Section: Discussionmentioning

confidence: 87%

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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Gas Exchanges and Antioxidant Activity in <i>Copaifera langsdorffii</i> Desf. Seedlings after Flooding

Cited by 8 publications

References 33 publications

Do Hydro-Retainer Polymers Attenuate Damage from Water Fluctuations in Leaf Metabolism and the Quality of Cedrela odorata Seedlings?

Do Hydro-Retainer Polymers Attenuate Damage from Water Fluctuations in Leaf Metabolism and the Quality of Cedrela odorata Seedlings?

Physiological Response of Conventional and Transgenic Maize to Water Stress

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

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