&lt;b&gt;Shading effects on leaf life span and functional traits in the widespread species &lt;i&gt;Enterolobium contortisiliquum&lt;i&gt; (Vell.) Morong

Souza, João Paulo; Melo, Nayara Magry Jesus; Halfed, Alessandro Dias; Reis, J.N.R. de S.

doi:10.4025/actascibiolsci.v39i1.33400

Cited by 15 publications

(25 citation statements)

References 34 publications

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“…On the other hand, Melo et al (2008) Seedling growth of tree species... found that for five levels of shading, the highest quality plants of Enterolobium contortisilliquum (Vell.) Morong developed both in full sun and under 20% shading; whereas, Souza et al (2017) found greater growth in seedlings of this species under full sun.…”

Section: Discussionmentioning

confidence: 59%

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Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

2018

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Hydrogels (polyacrylamide compounds) are recommended in agriculture and forestry as soil conditioners because they are able to absorb water and increase its stocks in the soil. The aim of this study was to determine the most suitable dose of hydrogel to establish seedlings of Enterolobium contortisilliquum (Vell.) Morong under two levels of luminosity. Seedlings of Enterolobium contortisilliquum (Vell.) Morong were planted in pots, following a design of subdivided plots, consisting of two levels of luminosity in the plots: full sun and 50% luminosity, and 10 doses of hydrogel in the sub-plots: 0.0, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5 and 6.0 g L-1. Seventy-two days after the seedlings were transplanted to the pots, plant height and diameter were determined, together with the height to diameter ratio, root length and diameter, shoot and root dry weight, and the shoot to root ratio. The lowest ratios between height and stem diameter (8.50 and 8.68) occurred in the seedlings in full sun at the doses of 0 and 2 g hydrogel L-1 respectively. For shaded seedlings the lowest ratio (8.14) occurred at the dose of 3.0 g L-1, but with a lower coefficient of determination (R2 = 0.68). Shoot dry weight increased with the dose of 2 g L-1 in full sun, and 3.5 g L-1 under shaded conditions. The doses of hydrogel giving the best initial development in seedlings under evaluation were 2 g L-1 in full sun and 3.5 g L-1 in the shaded environment. Although a response by the species to the doses of hydrogel was found, the benefits of the polymer were not evident under the conditions of the present study.

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Section: Discussionmentioning

confidence: 59%

“…Enterolobium contortisilliquum (Vell.) Morong has more chlorophyll a and more total chlorophyll when grown in a shaded environment (Souza et al, 2017). Chlorophyll a absorbs light at wavelengths greater than 680 nm, while chlorophyll b absorbs light at shorter wavelengths (Rabinowitch and Govindjee, 1965).…”

Section: Discussionmentioning

confidence: 99%

Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

2018

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“…Morong. (Fabaceae), is a leguminous species native to Brazil, and it is characterized as deciduous during winter and represents a pioneer and hygrophytic-selective species (Souza, Melo, Halfed, & Reis, 2017). This tree has been used in the restoration of degraded areas and mixed-species plantations because of its rapid growth, which can reach five meters in less than two years (Souza et al, 2017;Araujo & Paiva Sobrinho, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…(Fabaceae), is a leguminous species native to Brazil, and it is characterized as deciduous during winter and represents a pioneer and hygrophytic-selective species (Souza, Melo, Halfed, & Reis, 2017). This tree has been used in the restoration of degraded areas and mixed-species plantations because of its rapid growth, which can reach five meters in less than two years (Souza et al, 2017;Araujo & Paiva Sobrinho, 2011). Nevertheless, this species presents low seedling germination because of an impermeable cover formed by macrosclereids and a high number of hydrophobic substances that induce the physical dormancy of the seeds (Baskin, Baskin, & Xiaojie, 2000).…”

Section: Introductionmentioning

confidence: 99%

Methods for overcoming dormancy and seed storage of Enterolobium contortisiliquum

2019

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The production of forest species that present seedlings with exogenous dormancy is limited by low germination rates, which can be overcome by rupturing or weakening the tegument. This study aimed to evaluate the efficiency of low-cost methods of overcoming dormancy and determine the effect of storage on the seeds of Enterolobium contortisiliquum. Four storage periods were used, freshly collected seeds (0), stored for 6, 12 and 18 months, and four methods were applied, mechanical scarification and immersion in water (EI), mechanical scarification (ES), immersion in water (IM) and control (TE). We obtained the percentage values of seedling emergence (EP) and the mean emergence time (TME). Conductivity and moisture were obtained as indicators of the physical and physiological quality of seeds, respectively. Variations in moisture content and electrical conductivity during storage did not have effect on the percentage of germination. EI treatment was more efficient for overcoming dormancy than the ES was, regardless of storage time. IM and TE treatments did not lead to germination. EI was the most efficient treatment for decreasing the TME. The results indicate that alternative and low-cost methods are efficient at overcoming exogenous dormancy and thus can be used to optimize the process of seedling production.

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“…Morong is considered a widespread species (Lima, Oliveira, & Rodrigues, 2009;Araújo & Paiva Sobrinho, 2011) and invasive with the potential to disrupt native plant communities (Cochrane, 1999). It occurs in native forest formations, in the Atlantic Forest domain (Lima et al, 2009;BFG, 2015) and in the Cerrado and Caatinga vegetation in northeastern Brazil (Souza, Melo, Halfeld, & Reis, 2017). At the southern limit of its distribution in Brazil, this species is found in seasonal forests, open fields, and shrub restinga habitat (Amorim, De Souza, Oliveira, Camacho, & De Melo, 2016).…”

Section: Introductionmentioning

confidence: 99%

Elevated CO2 concentration improves functional traits and early growth of the widespread species Enterolobium contortisiliquum (Vell.) Morong

Melo

Rosa

Pereira

et al. 2018

Acta Sci. Biol. Sci.

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Enterolobium contortisiliquum is a neotropical widespread species that occurs in native Atlantic Forest, Cerrado and Caatinga vegetation in Brazil. Outside Brazil, it occurs in Argentina, Bolivia, Paraguay, and Uruguay. The objective of this study was to investigate the influence of high carbon dioxide concentration [CO 2 ] on leaf gas exchange, chlorophyll content, chlorophyll a fluorescence, growth, and biomass allocation among roots, stems, and leaves in young plants of E. contortisiliquum. After germination, twenty days old individuals of E. contortisiliquum were grown in open-top chambers (OTC) at two different [CO 2 ] (400 ppm and 700 ppm). Physiological measurements were made when the plants had been grown in OTC for 170, 200, 230, and 260 days. The higher [CO 2 ] favored the early growth of E. contortisiliquum by increasing maximum net photosynthesis (P N) and water use efficiency. Under high [CO 2 ], root dry mass increased in E. contortisiliquum, which might be a trait that will benefit this species by enhancing water uptake, particularly in seasonally dry environments.

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<b>Shading effects on leaf life span and functional traits in the widespread species <i>Enterolobium contortisiliquum<i> (Vell.) Morong

Cited by 15 publications

References 34 publications

Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

Methods for overcoming dormancy and seed storage of <i>Enterolobium contortisiliquum

<b>Elevated CO<sub>2</sub> concentration improves functional traits and early growth of the widespread species <i>Enterolobium contortisiliquum</i> (Vell.) Morong<sub>

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