Ecophysiological Strategies of <i>Cedrela fissilis</i> Vell. Seedlings under Conditions of Flooding and Light Availability

Barbosa, Lucivania de Oliveria; Dresch, Daiane Mugnol; Scalon, Lourenço Quintão; Scalon, Silvana de Paula Quintão

doi:10.1080/10549811.2020.1867183

Cited by 10 publications

(10 citation statements)

References 40 publications

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“…. myrcianthes seedlings under stress by ooding showed a Ci value 23.55% lower compared to the seedlings under water de cit, this reduction can be more observed in the seedlings of the S2Si treatment, due to the greater carboxylation of Rubisco Barbosa et al (2021). conclude that the lower internal concentration of CO 2 in ooded plants is attributed to the lower Gs and storage capacity of this element, due to stress having induced stomatal closure and continuous consumption of previously stored CO 2 .…”

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confidence: 75%

“…Under ooding, root hypoxia is known to reduce photosynthetic rates, causing a reduction in transpiration and stomatal conductance, and has been related to both stomatal and non-stomatal factors(Barbosa et al 2021). We believe that the smaller reduction in transpiration of seedlings treated with Si was due to other mechanisms in stress control, since Si acts to reduce E(Zhu et al 2015;Rizwan et al 2015), which can be attributed to the higher CRA on the sheets as mentioned.In ooded Dipteryx alata Vogel.…”

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confidence: 99%

“…Similar results were veri ed in Cedrela ssilis Vell. during ooding(Barbosa et al 2021). The lower A/Ci values in ooded plants may be due to the damage to gas exchange, such as stomatal closure, that hypoxic conditions cause to the photosynthetic apparatus in plants exposed to ooding for long periods.…”

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confidence: 99%

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Does silicon inEugenia myrcianthes Nied. seedlings under water stress contribute in the tolerance and recovery?

Foresti

Scalon

Santos

et al. 2023

Preprint

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Purpose: Silicon (Si) could contribute to the stability of photosystem II processes and gas exchange. Moreover, it can increase antioxidant enzyme activity, maintaining the growth of E. myrcianthes under water fluctuation, favoring seedling tolerance and recovery after stress suspension. This study aimed to evaluate the silicon effect on E. myrcianthes subjected to water fluctuation and the potential recovery of photosynthetic and enzymatic metabolism and seedling growth after stress suspension. Methods: Two water regimes: continuous irrigation (I), with 75% of the water retention capacity of the substrate, and water stress (E), with irrigation suspension followed by flooding. The water regimes were associated with different Si concentrations: 0, 2, and 4 mmol L-1. The seedlings were evaluated in five periods: Time zero (T0), with initial evaluations and irrigation suspension; First photosynthesis close to zero under water deficit - 1st P0; First recovery - 1st REC; Second photosynthesis close to zero under flooding - 2nd P0; Second recovery - 2nd REC. Results: Water fluctuation negatively affected the photosynthetic and enzymatic metabolism of E. myrcianthes. However, we observed 100% survival of all seedlings, suggesting the physiological plasticity of the species. Applying 2 mmol L-¹ of silicon to the seedlings helped them tolerate the stressful effect of water fluctuation. Conclusion: Water stress decreased the development of E. myrcianthes seedlings, damaging the photochemical and biochemical metabolism of photosynthesis, increasing antioxidant enzyme activity, and reducing root growth and seedling quality. However, Si application at concentrations of 2 mmol L-¹ mitigated water stress effects, favoring seedling development and tolerance to water fluctuation. The species can adjust to stressful conditions and shows potential for survival and tolerance at this developmental stage, recovering its metabolism and growth after stress.

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confidence: 75%

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confidence: 99%

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Does silicon inEugenia myrcianthes Nied. seedlings under water stress contribute in the tolerance and recovery?

Foresti

Scalon

Santos

et al. 2023

Preprint

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“…Information on tolerance to isolated or combined abiotic stresses is still scarce for native species, although such stresses are normal in nature. The interactive effect of light, shading, and water stress has been reported for some native tree species in Brazil but has not been widely investigated, requiring further studies ( Araújo et al., 2020 ; Bartieres et al., 2020 ; Cremon et al., 2020 ; Barbosa et al., 2021 ; Rosa et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…Species behave differently after the suspension of water stress; some do not survive, and others take time to recover, and other recover normally. These responses are attributed to physiological and metabolic plasticity, which ensures adjustments and tolerance to stressful environments ( Araújo et al., 2020 ; Bartieres et al., 2020 ; Cremon et al., 2020 ; Barbosa et al., 2021 ; Rosa et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

How does shading mitigates the water deficit in young Hymenaea courbaril L. plants?

Reis,

Scalon,

Foresti

et al. 2023

Front. Plant Sci.

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Information on tolerance to isolated or combined abiotic stresses is still scarce for tree species, although such stresses are normal in nature. The interactive effect of light availability and water stress has been reported for some native tree species in Brazil but has not been widely investigated. To test the hypothesis that shading can mitigate the stressful effect of water deficit on the photosynthetic and antioxidant metabolism and on the growth of young Hymenaea courbaril L. plants, we evaluated the following two water regimes: a) continuous irrigation – control (I) - 75% field capacity. and b) water deficit (S), characterized by irrigation suspension associated the two following periods of evaluation: P0 - when the photosynthetic rate of plants subjected to irrigation suspension reached values close to zero, with the seedlings being re-irrigated at that moment, and REC - when the photosynthetic rate of the re-irrigated plants of each shading levels reached values similar to those of plants in the control treatment, totaling four treatments: IP0, SP0, IREC, and SREC. The plants of these four treatments were cultivated under the four following shading levels: 0, 30, 50, and 70%, constituting 16 treatments. Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril. Water deficit associated with cultivation without shading (0%) should not be adopted in the cultivation or transplantation of H. courbaril. After the resumption of irrigation in the REC, the other characteristics presented a recovery under all cultivation conditions. Key message: Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril.

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Does flooding affect the survival and primary and secondary metabolism of two species of Croton?

Lima

Scalon

Cardoso

et al. 2023

Trees

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Ecophysiological Strategies of Cedrela fissilis Vell. Seedlings under Conditions of Flooding and Light Availability

Cited by 10 publications

References 40 publications

Does silicon inEugenia myrcianthes Nied. seedlings under water stress contribute in the tolerance and recovery?

Does silicon inEugenia myrcianthes Nied. seedlings under water stress contribute in the tolerance and recovery?

How does shading mitigates the water deficit in young Hymenaea courbaril L. plants?

Does flooding affect the survival and primary and secondary metabolism of two species of Croton?

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