Photosynthesis and Growth of Copaiba Seedlings Subjected to Soil Flooding

Vidal, Daniela B.; Andrade, Isis Leite Medeiros Mascarenhas; Dalmolin, Ândrea Carla; Mielke, Marcelo Schramm

doi:10.1590/2179-8087.056916

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Under flooding, root respiration underwent an immediate drop due to oxygen deficiency, with reductions in ATP production, limiting the energy supply for root and shoot growth (Zanandrea et al, 2010). On the other hand, this growing interruption is related to metabolic changes during the flooding period, which shows an increased production of the ethylene hormone, considered an important signal of water stress, allowing energy reserves to be used for the formation of organs, tissues, or of stomata, which was not assessed in this study but is associated with a reduction in gs, which hindered the entry of CO 2 and caused reductions in the ribulose-1,5bisphosphate carboxylase/oxygenate (Rubisco) activity (non-stomatal cause) (Dalmolin et al, 2013;Liu et al, 2014;Vidal et al, 2019), reducing photosynthetic metabolism, which was verified in this study.…”

Section: Discussionmentioning

confidence: 99%

Do Dipteryx alata Vogel seedlings recover the quality and the photosynthetic and antioxidant responses in the post-flooding?

et al. 2023

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Dipteryx alata Vogel is a tree species widely found in Cerrado, settling preferentially in well drained soils. Studies related to ecophysiology of D. alata may contribute to the decision making about using seedlings of this species in projects aimed at the recovery of degraded areas where seasonal flooding happens. This study aimed to assess the effects of flooding on photosynthetic and antioxidant metabolism and quality of D. alata seedlings cultivated or not under flooding during four assessment periods (0, 20, 40, and 60 days), followed by 100 days after the end of each assessment period (0+100, 20+100, 40+100, and 60+100 days), allowing verifying the potential for post-flooding recovery. Flooded plants showed lower photosynthetic efficiency than non-flooded plants, regardless of the periods of exposure. However, this efficiency was recovered in the post-flooding, with values similar to that of the non-flooded seedlings. Moreover, the damage to FV/FM was evidenced by an increase in the period of exposure to flooding, but recovery was also observed at this stage of the photosynthetic metabolism. Seedling quality decreased under flooding, not varying between periods of exposure, but remained lower although the increase observed in the post-flooding period, with no recovery after flooding. The occurrence of hypertrophied lenticels associated with physiological changes and an efficient antioxidant enzyme system might have contributed to the survival and recovery of these seedlings. Thus, this species is sensitive to flooding stress but capable of adjusting and recovering metabolic characteristics at 100 days after the suspension of the water stress, but with no recovery in seedling quality. Thus, we suggested plasticity under the cultivation condition and determined that the time of 100 days is not enough for the complete resumption of growth.

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Section: Discussionmentioning

confidence: 99%

Do Dipteryx alata Vogel seedlings recover the quality and the photosynthetic and antioxidant responses in the post-flooding?

et al. 2023

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“…The oxidation of flooded roots is due to the fact that under anoxia/hypoxia there is an excessive production of ethanol due to the increased enzymatic activity associated with anaerobic respiration. That is, low supply of O 2 accelerates glycolysis, and anaerobic respiration leads to excess acid production by lactate dehydrogenase to compensate for the low energy production in respiration (Lobo and Joly, 2000;Vidal et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Does silicon and salicylic acid contribute in the morphophysiology of Schinus terebinthifolia seedlings under flooding?

et al. 2023

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Flooding can damage the photosynthetic apparatus and initial growth of Schinus terebinthifolia. We aimed this study evaluates the potential of silicon (Si) and salicylic acid (SA) as mitigating agents on the ecophysiological responses and initial growth of S. terebinthifolia subjected to flooding periods. Seedlings were grown under the following conditions: 1) control (non-flooded): daily irrigation, 2) Flooded (F): storage of seedlings in a 500 L plastic pool, keeping the water depth at ± 2.0 cm above the substrate level, 3) F + 1.0 mM Si, 4) F + 2.0 mM Si, 5) F + 1.5 mM SA, and 6) F + 3.0 mM SA, and evaluated to 15 and 30 days. We observed that flooded seedlings formed hypertrophied lenticels on the stem on the 7th day as a stress adjustment strategy. S. terebinthifolia is sensitive to flooding, although it maintains a stable gas exchange for up to 15 days in this condition. The applications of 1.0 mM Si mitigated the pronounced decrease of gas exchange by 30 days. Using 1.0 mM Si and 3.0 mM SA contributed for integrity of the photosynthetic apparatus and to photochemical activities in the reaction centers, in addition favors to higher seedling biomass and quality under flooding. Foliar application of Si and SA is promising practice for photosynthetic metabolic and initial growth of S. terebinthifolia seedlings under flooded stress.

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“…Também se verifica que espécies vegetais diferentes reagem de forma diferente à hipóxia do solo (Belfort et al, 2020). Se for considerado apenas as espécies tropicais, ainda assim, há uma grande diversidade de respostas nas espécies aos alagamentos periódicos do solo (Oliveira & Joly, 2010;Medri et al, 2012;Binotto et al, 2016;Vidal et al, 2019).…”

Section: Introductionunclassified

Impactos da inundação sobre as características morfológicas de plântulas de Myrciaria dubia

Jardim,

Fontenele

2023

Rev. DELOS

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O Camu-camu (Myrciaria dubia (Kunth) McVaugh) é uma espécie pertencente à família Myrtaceae, nativa da região amazônica, encontrada em áreas alagadas sazonalmente pelas cheias das águas fluviais. Este estudo teve como objetivo avaliar os efeitos do alagamento do solo sobre as características morfológicas de plântulas de Myrciaria dubia. O delineamento experimental foi o inteiramente casualizado, com dois tratamentos (solo alagado e não alagado) e 50 repetições para cada tratamento. As caraterísticas morfológicas avaliadas foram a altura da planta, diâmetro do caule, número de folhas, comprimento da raiz, massa seca da parte aérea, massa seca da raiz e massa seca total. Os resultados mostraram que as plantas alagadas apresentaram os piores resultados, nas características morfológicas avaliadas, quando comparadas as plantas não alagadas. Os resultados indicam que a Myrciaria dubia é uma espécie tolerante ao ambiente sazonalmente alagado, podendo assim, ser indicada para restauração de matas ripárias degradadas.

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Photosynthesis and Growth of Copaiba Seedlings Subjected to Soil Flooding

Cited by 5 publications

References 31 publications

Do Dipteryx alata Vogel seedlings recover the quality and the photosynthetic and antioxidant responses in the post-flooding?

Do Dipteryx alata Vogel seedlings recover the quality and the photosynthetic and antioxidant responses in the post-flooding?

Does silicon and salicylic acid contribute in the morphophysiology of Schinus terebinthifolia seedlings under flooding?

Impactos da inundação sobre as características morfológicas de plântulas de Myrciaria dubia

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