Leaf phenology, growth and photosynthesis in Pseudobombax munguba (Malvaceae)

Marenco, Ricardo Antonio; Sousa, Francinete de Freitas; Oliveira, M. F.

doi:10.1590/0034-737x201966010001

Cited by 4 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Production of new leaves (leaf flushing) tends to increase in the dry season (Marenco et al 2019;Janssen et al 2021), therefore the absence of an effect of temperature, irradiance and precipitation on DGR does not necessarily mean that canopy photosynthesis did not increase in the dry season, as assimilated carbon may have been diverted to leaf production. Wood production has relatively lower priority in comparison with production of new leaves, buds, and fine roots (Pretzsch 2009).…”

Section: Discussionmentioning

confidence: 99%

Wood and bark water content and monthly stem growth in Amazonian tree species

Dias

Marenco

2021

Acta Amaz.

Self Cite

View full text Add to dashboard Cite

The knowledge of how trees respond to microclimate variability is important in the face of climate changes. The objectives of this study were to examine the variation in wood water content (WWC) and bark water content (BWC) in Amazonian trees, as well as to assess the effect of microclimatic variability on monthly diameter growth rates (DGR). We extracted a core sample from each of 120 trees (28 species) and determined WWC and BWC on a fresh matter basis. DGR was measured monthly during the 12 months of 2007. The effect of microclimatic variability on DGR was analyzed by redundancy analysis. Average BWC and WWC were 53.4% and 34.7%, respectively, with a large variation in stem water content among species (BWC = 36.2−67.1%; WWC = 26.4−50.8%). There was no significant relationship between stem diameter and WWC or BWC, nor between DGR and wood density (p > 0.05). However, wood density was negatively correlated with WWC (r s = −0.69, p < 0.001). The high BWC emphasizes the importance of the bark tissue in Amazonian trees. Contrary to expectations, variability of monthly irradiance, rainfall and temperature had no effect on DGR (p > 0.20). The unresponsiveness of DGR to microclimatic variability, even in an above-average rainy year such as 2007, indicates that other parts of the tree may have greater priority than the stem for carbon allocation during the dry season.

show abstract

Section: Discussionmentioning

confidence: 99%

Wood and bark water content and monthly stem growth in Amazonian tree species

Dias

Marenco

2021

Acta Amaz.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Por outro lado, o teor de clorofila das folhas tende a aumentar ao longo do crescimento inicial de mudas, assim como observado por Marenco et al (2019). Pois, segundo os referidos autores, como a assimilação de carbono depende da quantidade de energia capturada, o aumento do teor de clorofila levaria ao aumento da fotossíntese.…”

Section: Discussionunclassified

“…A biomassa seca e a área foliar total das mudas tende a aumentar ao longo do crescimento das mudas, como esperado. Essas variáveis apresentam relação positiva com a taxa fotossintética e crescimento de plantas (MARENCO et al, 2019). Isso porque plantas decíduas, como B. gaudichaudii, apresentam valores de MFE inferiores aos de espécies sempre verdes (DE LA RIVA et al, 2016).…”

Section: Discussionunclassified

Efeito Do Tamanho Das Sementes Sobre a Emergência E Morfofisiologia De Mudas De Mama Cadela

Querioz

Dias

2021

NAT

View full text Add to dashboard Cite

O objetivo deste estudo foi avaliar a emergência de plântulas e a morfofisiologia de mudas de mama-cadela (Brosimum gaudichaudii Trécul) produzidas a partir de sementes de diferentes tamanhos. Foram determinadas a porcentagem de emergência de plântulas e as características morfofisiológicas das mudas (altura, diâmetro do colo, índice de robustez, espessura foliar, índice de clorofila, biomassa seca, massa foliar específica - MFE e área foliar total). A emergência iniciou-se após 21 dias da semeadura e atingiu, ao final do experimento, 84% para as sementes pequenas, valor inferior ao das sementes médias e grandes (94 e 90%, respectivamente). Em 60 dias, as mudas apresentavam, em média, 2,53 mm de diâmetro e 12,81 cm de altura. Nos primeiros 30 dias, as mudas formadas a partir de sementes pequenas tinham alturas menores que as demais. O tamanho das sementes não afetou o diâmetro do colo e a espessura das folhas durante o crescimento inicial das mudas, assim como para os parâmetros morfofisiológicos estudados. Ao longo de 120 dias, houve aumento do conteúdo de clorofilas, biomassa seca, área foliar total, exceto para a MFE. O tamanho das sementes afeta a emergência e a altura das mudas de mama-cadela após 30 dias após a emergência. Palavras-chave: Brosimum gaudichaudii; Cerrado; crescimento inicial. Effect of seed size on emergence and mophophysiology of mama-cadela seedlings ABSTRACT: The objective of this study was to evaluate the seedling emergence and morphophysiology of mama-cadela (Brosimum gaudichaudii Trécul) seedlings produced from seeds of different sizes. Seedling emergence percentage and seedling morphophysiological characteristics (height, diameter, slenderness index, leaf thickness, chlorophyll index, dry matter, specific leaf mass - MFE and total leaf area) were determined. The emergence started after 21 days of sowing and reached, at the end of the experiment, 84% for small seeds, lower than the average and large seeds (94 and 90%, respectively). In 60 days, the seedlings had, on average, 2.53 mm in diameter and 12.81 cm in height. In the first 30 days, seedlings formed from small seeds had shorter heights than the others. The seeds size did not affect the diameter and the leaves thickness during the initial growth of the seedlings, as well as for the morphophysiological parameters studied. Over the 120 days, there was an increase in the content of chlorophylls, dry matter, total leaf area, except for MFE. The seeds size affects the emergence and the height at 30 days after mama-cadela seedlings emergence. Keywords: Brosimum gaudichaudii; Brazilian savanna; initial growth.

show abstract

“…These very light fibers are hollow, hydrophobic and have thermoacoustic insulation properties similar to the material produced by the kapok tree, Ceiba pentandra (L.) Gaertn., known in Brazil as samaúma. Because of its extreme flood-tolerance, P. munguba can be used in reforestation programs, particularly in areas with a mild drought period (Marenco et al 2019).…”

mentioning

confidence: 99%

First record of the association of the weevil Loncophorus longinasus with the fruit of munguba, Pseudobombax munguba in Central Amazonia, Brazil

Keppler

Silva

2020

Acta Amaz.

View full text Add to dashboard Cite

We report the first record of occurrence of Loncophorus longinasus in fruits of munguba, Pseudobombax munguba, in the state of Amazonas, Brazil. Some morphological and biological aspects of L. longinasus are presented. Adults were obtained through natural emergence from munguba fruits that opened for seed dispersal. The fruits had perforations leading to galleries through the exocarp. Inside the fruit, larvae were found at the seed insertion points on the central seed attachment structure. The pupae developed in a cocoon at the same structure and turned mature simultaneously with the capsule opening. Together with the larvae, the presence of ants (Pseudomyrmex sp.) was observed, that apparently maintained the galleries open for access and feeding on larval exudates.

show abstract

Leaf phenology, growth and photosynthesis in Pseudobombax munguba (Malvaceae)

Cited by 4 publications

References 30 publications

Wood and bark water content and monthly stem growth in Amazonian tree species

Wood and bark water content and monthly stem growth in Amazonian tree species

Efeito Do Tamanho Das Sementes Sobre a Emergência E Morfofisiologia De Mudas De Mama Cadela

First record of the association of the weevil Loncophorus longinasus with the fruit of munguba, Pseudobombax munguba in Central Amazonia, Brazil

Contact Info

Product

Resources

About