Variações sazonais nas concentrações de pigmentos e nutrientes em folhas de espécies de cerrado com diferentes estratégias fenológicas

Carvalho, Ana P.; Bustamante, Mercedes M. C.; Kozovits, Alessandra Rodrigues; Asner, Gregory P.

doi:10.1590/s0100-84042007000100003

Cited by 16 publications

(24 citation statements)

References 36 publications

(35 reference statements)

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“…Climate seasonality is an important determinant of phenological events, having a direct impact on metabolic and regulating processes such as germination, sprouting, senescence, flowering, and fruiting (Taiz and Zeiger 2013). Plant response to seasonality effects has been widely studied in northern ecosystems (Chapin III 1980), Mediterranean (Valladares et al 2000), and other strongly seasonal ecosystems, such as the Brazilian cerrado (Carvalho et al 2007), where the vegetation is subjected to severe resource constraints during a period of the year and shows morphophysiological variations. The ecophysiology of plants from subtropical forests, where the transition between seasons is gradual, has not been studied in depth up until now, and general data on subtropical forests are still scarce.…”

Section: Introductionmentioning

confidence: 99%

Interspecific variation in leaf pigments and nutrients of five tree species from a subtropical forest in southern Brazil

Bündchen

Boeger

Reissmann

et al. 2016

An. Acad. Bras. Ciênc.

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The purpose of this study was to analyze the seasonal variation in the nutrient and pigment content of leaves from fi ve tree species -of which three are perennial (Cupania vernalis, Matayba elaeagnoides and Nectandra lanceolata) and two are deciduous (Cedrela fi ssilis and Jacaranda micrantha) -in an ecotone between a Deciduous Seasonal Forest and a Mixed Ombrophilous Forest in the state of Santa Catarina, Brazil. Leaf samples were collected in the four seasons of the year to determine the content of macronutrients (N, K, P, Mg, Ca, S) and photosynthetic pigments (Chl a , Chl b , Chl tot , Car tot , Chl a :Chl b and Car tot :Chl tot ). The principal component analysis showed that leaf pigments contributed to the formation of the fi rst axis, which explains most of the data variance for all species, while leaf nutrient contribution showed strong interspecifi c variation. These results demonstrate that the studied species have different strategies for acquisition and use of mineral resources and acclimation to light, which are determinant for them to coexist in the forest environment.

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Section: Introductionmentioning

confidence: 99%

Interspecific variation in leaf pigments and nutrients of five tree species from a subtropical forest in southern Brazil

Bündchen

Boeger

Reissmann

et al. 2016

An. Acad. Bras. Ciênc.

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“…Carvalho et al (2007) have also shown that leaves collected during the rainy season had higher rates of N and P compared to those collected in the dry season. Another factor that might have indirect influence on F. mannifera is the sprout of leaves during the dry-rain transition because young leaves tend to have higher nutrient leaching as a result of the rains.…”

Section: Discussionmentioning

confidence: 91%

Could Fidicina mannifera (Hemiptera: Cicadoidea: Fidicinini) promote a resource pulse in two Brazilian Cerrado vegetation classes?

2017

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Cicadas are usually studied regarding their importance in agriculture. However, the possibility of this group to represent a pulse of nutrients can also imply on the success of a given species in the biome. The aim of this study was to assess the level of total soluble proteins and lipids of Fidicina mannifera (Fabricius, 1803), and to determine whether the species can promote a pulse of nutrients in two vegetation classes of the Brazilian Cerrado. To assess the pulse of nutrients, it was concluded the determination of total soluble proteins and lipids from samples of males and adult females of F. mannifera, and the spatial distribution of exuviae of this species was also calculated in two vegetation classes of the Brazilian Cerrado. The amount of protein provided by each individual did not differ between males and females (p = 0.66) but females had 40% more lipids than males (p = 0.05). Regarding F. mannifera the gallery forest offered 11.75 g/ha of protein, 3.91 g/ha of lipids, and the Cerrado stricto sensu offered 4.25 g/ha of protein, and 1.41 g/ha of lipid. The male cicadas have a hollow abdomen, which houses a resonance chamber for sound production in order to attract females to mate, and females store larger amounts of lipids, mainly located in the abdominal cavity, where the body fat is directly linked to the reproductive system for the development of the ovaries and egg production after emergence. The mass occurrence of F. mannifera in the Brazilian Cerrado and the fast availability of proteins and lipids make this species a food resource that can directly impact the diet of secondary consumers and scavengers, although the amount of nutrients available by F. mannifera does not promote a pulse of nutrients in the study site.Keywords: Cicadidae, cicada, protein, lipids, sexual maturation.Fidicina mannifera (Hemiptera: Cicadoidea: Fidicinini) promove pulsos de nutrientes em duas fitofisionomias do Cerrado?Resumo O interesse no estudo de cigarras geralmente é despertado pela sua importância na agricultura. Entretanto, a possibilidade de que este grupo represente um pulso de nutrientes pode também implicar no sucesso de sobrevivência de espécies importantes num determinado bioma. O objetivo deste trabalho foi verificar o nível de proteínas solúveis e lipídios totais de Fidicina mannifera (Fabricius, 1803) e determinar se a espécie pode promover um pulso de nutrientes em duas fitofisionomias do Cerrado. Para avaliar o pulso de nutrientes, foram determinados os níveis de proteínas solúveis e lipídios totais de machos e fêmeas adultos de F. mannifera, e também a distribuição espacial de exúvias desta espécie, em duas fitofisionomias de Cerrado. A quantidade de proteínas disponibilizada por indivíduo não diferiu entre machos e fêmeas (p = 0,66), porém fêmeas apresentaram 40% mais lipídios do que machos (p = 0,05). Para mata de galeria F. mannifera ofertou 11,75 g/ha de proteína, 3,91 g/ha de lipídios, e no cerrado stricto sensu, 4,25 g/ha de proteína, e 1,41 g/ha de lipídio. Machos de cigarras possuem um...

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“…Foliar characters are often used as indicators of the relationship between the use of resources by plants, their biomass and the ecosystem functioning (Craine, Froehle, Tilman, Wedin, & Chapin, 2001). Studies have sought to establish relationships between environmental conditions and foliar properties, although leaf characteristics are usually measured at the peak of the growing season when environmental conditions favor carbon assimilation and there is an abundance of expanded and healthy leaves (Carvalho, Bustamante, Kozovits, & Asner, 2007), with scarce work conducted in savanna environments. In these ecosystems, low water availability, soil nutrient deficiencies and fire are the main causes of instability in final productivity.…”

Section: Introductionmentioning

confidence: 99%

“…Pilon, Udulutsch, and Durigan (2015) studied the phenological patterns of 111 cerrado species, indicating that the mangabeira is a semideciduous or deciduous species that loses leaves during the dry season of the year, agreeing with Lorenzi (2000), and A. V. Pereira, E. B. C. Pereira, and Silva Júnior (2010). According to Carvalho et al (2007), who analyzed the concentration of pigments and nutrients in leaves of cerrado species with different phenological strategies, detected no differences in the behavior of deciduous and evergreen plants.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the relevance of photosynthetic pigments to the leaf functioning, there are still no studies that relate the seasonal variations in their concentrations in cerrado species (Carvalho et al, 2007). Based on this premise, the goal of this study was to evaluate the contents of chlorophyll a and b, chlorophyll a/chlorophyll b ratio, total chlorophyll, carotenoid and total chlorophyll/carotenoid ratio, during the periods of the year, relating them to the main phenological events, periods (rainy, dry and transitions) and populations evaluated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seasonal Variation of Chlorophyll and Carotenoids in Leaves of Hancornia speciosa in Three Central Areas of the Cerrado of the State of Tocantins, Brazil

Oliveira¹,

Silva²,

Chagas³

2018

JAS

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This study aimed to evaluate the seasonal variation in concentrations of chlorophyll a, b, total chlorophyll and carotenoids in leaves of Hancornia speciosa, Gomes, during the periods of the year, relating them to the main phenological events, periods (rainy, dry and transitions) and populations evaluated. The survey was performed in three sites and the spatio-temporal analysis divided into four periods (rainy, rainy-drytransition, dry and dry-rainy transition), with 10 replicates (matrix plants). The data were collected in average intervals of 33 days from October 2014 to April 2017. The extraction and calculation of the chlorophyll and carotenoid contents of the leaves were expressed in mg/g DM, according to the equations of Arnon (1949) and Lichtenthaler (1987). There was a significant difference between the periods and sites analyzed for all pigments and their relationships. There was a greater amount of chlorophyll a than chlorophyll b; this difference was greater in the dry period. In the rainy period, we found a greater amount of total chlorophyll, carotenoids and total chlorophyll/carotenoid ratio. The behavior for the species follows that already observed for deciduous plants, closely related to water availability.

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Variações sazonais nas concentrações de pigmentos e nutrientes em folhas de espécies de cerrado com diferentes estratégias fenológicas

Cited by 16 publications

References 36 publications

Interspecific variation in leaf pigments and nutrients of five tree species from a subtropical forest in southern Brazil

Interspecific variation in leaf pigments and nutrients of five tree species from a subtropical forest in southern Brazil

Could Fidicina mannifera (Hemiptera: Cicadoidea: Fidicinini) promote a resource pulse in two Brazilian Cerrado vegetation classes?

Seasonal Variation of Chlorophyll and Carotenoids in Leaves of Hancornia speciosa in Three Central Areas of the Cerrado of the State of Tocantins, Brazil

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