Adaptation of Cedro-Vermelha, Tarumã-Azeitona, Ingá-Doce, Branquilho-Bravo and Ocotea-Guaicá Seedlings to Shading Levels

Garrett, Alexandre Techy de Almeida; Peres, Fabiana Schmidt Bandeira; Inoue, Mario Takao; Garcia, Flávio Augusto de Oliveira

doi:10.1590/2179-8087.005917

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…However, the increase in SD can be monitored as a function of height; otherwise, seedlings have an aspect of stagnation, as observed in the HDR of seedlings under 70 % of shade. Different light intensities can cause morphophysiological changes; thus, a slight reduction of light exposure can increase the leaf area (Garrett et al, 2020). This occurred for seedlings under 30 % of shade, indicating an efficient use of light.…”

Section: Discussionmentioning

confidence: 99%

Potassium silicate and light availability affect photochemical efficiency and morphology of Alibertia edulis

Paula,

Paulino,

Santos

et al. 2024

Sci. agric. (Piracicaba, Braz.)

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Light stress damages the photochemical apparatus and affects seedling growth of forest species. Using potassium silicate (K 2 SiO 3 ) can mitigate these deleterious effects and contribute to the acclimatization and robustness of seedlings. This study evaluated the effect of K 2 SiO 3 and shading levels on the photochemical and growth of Alibertia edulis (Rich) A. Rich seedlings. The experiment was arranged under three light conditions based on shading levels of 0 % (full sun), 30 %, and 70 %. Four doses of K2SiO3 applied through foliar spray were tested: 0.0, 2.5, 5.0, and 10.0 mL L -1 . Cultivation under full sun and under 70 % of shade was stressful for A. edulis, while cultivation under 30 % of shade improved plant growth. Increasing application of K 2 SiO 3 in seedlings under full sun damaged the reaction center, causing lower photochemical yields, but increased the photochemical efficiency of photosystem II under 30 % of shade. Using K 2 SiO 3 contributed to leaf water regulation while applying 10.0 mL L -1 increased chlorophyll indices, leaf area, physiological indices, and the quality of seedlings cultivated under full sun and 30 % of shade. Using 10.0 mL L -1 K 2 SiO 3 mitigated the negative effects of light stress under full sun. It provided high photochemical efficiency, morphology aspects, and Dickson quality indexA. edulis seedlings in environments with high or moderate light availability.

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Section: Discussionmentioning

confidence: 99%

Potassium silicate and light availability affect photochemical efficiency and morphology of Alibertia edulis

Paula,

Paulino,

Santos

et al. 2024

Sci. agric. (Piracicaba, Braz.)

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“…Furthermore, knowledge related to native forest species also is of great importance from an ecological and economic point of view (Rocha et al, 2014;Garrett et al, 2020). Despite this, this type of research is rare for most native essences.…”

Section: Introductionmentioning

confidence: 99%

Morphology and germination of Aegiphila brachiata Vell.: potential species for ecological restoration in atlantic forest

Maggioni¹,

Duarte²,

Vieira³

et al. 2023

Rev. DELOS

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Aegiphila brachiata is a forest native Brazilian species, known as peloteiro, with high capacity for biomass production and resistance to disturbances, having potential use in degraded ecosystems. Seeing the scarcity of studies on the species, we aimed to determine the morphobiometric characteristics of fruits, seeds and seedlings; and evaluate its germination potential. We determined physical characteristics of fruits and seeds, morphological description of seeds, germination stages and seedling development. Germination was in a completely randomized design (factorial scheme), with three temperatures (20, 25, and 30°C) and two methods of overcoming dormancy (partial and total endocarp removal). Fruits are indehiscent, fleshy, with persistent calyx. The pyrene is constituted by endocarp and seeds. Germination is hypogeal, and seedling cryptocotyledonary. Results show that removing the endocarp with the unprecedented methodology used is a suitable method to overcome mechanical dormancy (with 25 and 30°C), showing potential of the method for applicability in several species.

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“…Therefore, changes in the light levels to which a species acclimated may lead to different physiological responses in its biochemical, anatomical, and growth-related traits (Atroch et al 2001;Taiz and Zeiger 2006). Several studies have investigated the morphological and physiological acclimation of vascular plant leaves to speci c light conditions during their development (Anderson et al 1995;Kurasova et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Differential impact of liana colonization on the leaf functional traits of co-occurring deciduous and evergreen trees

Pandi

Babu

2021

Preprint

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The present study was carried out to analyse the leaf functional traits of co-occurring evergreen and deciduous tree species in a tropical dry scrub forest. This study also intended to check whether the species with contrasting leaf habits differ in their leaf trait plasticity, responding to the canopy-infestation by lianas. A total of 12 leaf functional traits were studied for eight tree species with contrasting leaf habits (evergreen and deciduous) and liana-colonization status (Liana+ and Liana−). In the liana-free environment (L−), evergreen trees had significantly higher specific leaf mass (LMA) and leaf dry matter content (LDMC) than the deciduous species. Whereas, the deciduous trees had higher specific leaf area (SLA) and mass-based leaf nitrogen concentration (Nmass). The leaf trait-pair relationship in the present study agreed to the well-established global trait-pair relationships (SLA Vs Nmass, Lth Vs SLA, Nmass Vs Lth, Nmass Vs LDMC, LDMC Vs SLA). There was no significant difference between L+ and L− individuals in any leaf functional traits studied in the deciduous species. However, evergreen species showed marked differences in the total chlorophyll content (Chlt), chlorophyll b (Chlb), SLA, and LMA between L+ and L− individuals of the same species. Deciduous species with the acquisitive strategy can have a competitive advantage over evergreen species in the exposed environment (L−) whereas, evergreen species with shade-tolerant properties were better acclimated to the shaded environments (L+). The result revealed the patterns of convergence and divergence in some of the leaf functional traits between evergreen and deciduous species. The results also showed the differential impact of liana colonization on the host trees with contrasting leaf habits. Therefore, liana colonization can significantly impact the C-fixation strategies of the host trees by altering their light environment. Further, the magnitude of such impact may vary among species of different leaf habits. The increased proliferation of lianas in the tropical forest canopies may pose a severe threat to the whole forest carbon assimilation rates.

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Adaptation of Cedro-Vermelha, Tarumã-Azeitona, Ingá-Doce, Branquilho-Bravo and Ocotea-Guaicá Seedlings to Shading Levels

Cited by 4 publications

References 17 publications

Potassium silicate and light availability affect photochemical efficiency and morphology of Alibertia edulis

Potassium silicate and light availability affect photochemical efficiency and morphology of Alibertia edulis

Morphology and germination of Aegiphila brachiata Vell.: potential species for ecological restoration in atlantic forest

Differential impact of liana colonization on the leaf functional traits of co-occurring deciduous and evergreen trees

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