EFFECT OF WATER DEFICIT AND ABSCISIC ACID ON PHOTOSYNTHETIC AND ANTIOXIDANT METABOLISM IN SEEDLINGS OF Calophyllum brasiliense (CAMBESS.)

Reis, Lucas Coutinho; Foresti, Andressa Caroline; Scalon, Silvana de Paula Quintão; Dresch, Daiane Mugnol; Pereira, Zefa Valdivina

doi:10.1590/01047760201824042603

Cited by 6 publications

(6 citation statements)

References 26 publications

(35 reference statements)

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“…The lower stomatal conductance (Gs) and Rubisco carboxylation rate (A/Ci) and higher internal CO 2 concentration of plants of H. courbaril under water deficit and 0% shading corroborate information in the literature in which these changes are related to variations in soil moisture due to irrigation, and in most species, reductions in gs associated with stomatal closure decrease water loss when exposed to low water availability and high insolation, while also reducing Rubisco activity (Reis et al, 2018;Bartieres et al, 2020;Freitas et al, 2020;Rosa et al, 2021;. These authors suggested that the increase of C i followed by reduction of A has been attributed to the lower rate of Rubisco carboxylation in plants under water and light stress.…”

Section: Discussionsupporting

confidence: 84%

Abiotic Stress in Plants: Sustainability and Productivity

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Section: Discussionsupporting

confidence: 84%

Abiotic Stress in Plants: Sustainability and Productivity

2024

Frontiers Research Topics

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“…The intercellular CO 2 concentration in plants under water restriction in P0 increased significantly, and in seedlings under 0% shading it was 3.7 times higher when compared to the other cultivation conditions, however, the values significantly reduced in Rec, which favored the increase of A/C i values especially in seedlings under 70% shading. The increase of C i on period of P0 in seedlings under water restriction is a consequence of the lower efficiency of carboxylation A/C i and gs, as observed for other tree species such as C. brasiliense (Reis et al 2018) H. courbaril (Freitas et al 2018) Schinus terebinthifolius Raddi (Nunes et al 2017).…”

Section: Discussionmentioning

confidence: 61%

“…Similarly, the activity of antioxidant enzymes increased both in the aerial parts of the plants and their roots, in response to water restriction in Schinus terebinthifolius Raddi seedlings (Nunes et al 2017). They were also observed in seedlings of C. brasiliense seedlings (Reis et al 2018), Copaifera langsdorffii Desf. (Rosa et al 2017).…”

Section: Discussionmentioning

confidence: 77%

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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“…The water deficit in the soil has caused metabolic changes in different species of plants [17,18]. However, with the passage of time of exposure in water deficiency conditions, plants can develop certain tolerance while maintaining breath ability for longer periods.…”

Section: V Discussionmentioning

confidence: 99%

Effects of Water Deficiency on Plants of Acacia mangium Willd

Fernandes¹,

Siebeneichler²,

Dotto³

et al. 2019

IJAERS

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The water deficit causes direct effects on the physiology of plants, affecting the biochemical reactions which results in reduction or stoppage of growth. The present study aimed to evaluate the influence of water deficit on gas exchange, water relations, accumulation of solute proline and activity of antioxidant enzymes in seedlings of Acacia mangium Willd., the statistical design was completely randomized design (DIC), represented by four water treatments (100; 60; 40 and 30% of field capacity) with 12 repetitions. Were evaluated at gas exchange ratio, leaf water potential, relative water content, activity of antioxidant enzymes, proline, and dry masses of leaves, stem, root and total. Gaseous Exchange in plants of Acacia mangium Willd., were influenced by reduced water availability in the soil. Treatment with 30% of field capacity presented greater accumulation of the amino acid proline content. There has been increased activity of antioxidant enzyme catalase in Acacia mangium Willd., in the treatment with 30% capacity field. In the production of dry matter to the most sensitive to water deficiency was the dry mass of leaves and stems, the treatments with 30% and 40% of field capacity.

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EFFECT OF WATER DEFICIT AND ABSCISIC ACID ON PHOTOSYNTHETIC AND ANTIOXIDANT METABOLISM IN SEEDLINGS OF Calophyllum brasiliense (CAMBESS.)

Abstract: Intermittent water defi cit decreased plant water status and gas exchange. Application of ABA preserved the photosynthetic apparatus. Antioxidant activity increased depending on the enzyme, ABA concentration and plant part.

Cited by 6 publications

References 26 publications

Abiotic Stress in Plants: Sustainability and Productivity

Abiotic Stress in Plants: Sustainability and Productivity

Does shading mitigate water restriction in Ormosia arborea seedlings?

Effects of Water Deficiency on Plants of Acacia mangium Willd

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