Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions

Rossatto, Davi Rodrigo; Kolb, Rosana Marta

doi:10.1590/s0102-33062010000300002

Cited by 54 publications

(51 citation statements)

References 37 publications

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“…The higher SLM of C. estrellensis plants in partial shade and full sunlight can be interpreted as a strategy to avoid photo-oxidative damage by increasing the resistance to penetration of damaging intensive irradiance (Rossato and Kolb 2012). The lowest Chl a and Chl b concentrations in full sunlight are typical for a sun-acclimated condition observed in other non-pioneer tropical tree species (Gonçalves et al 2001(Gonçalves et al , 2005.…”

Section: Discussionmentioning

confidence: 98%

“…Elongation of the parenchyma cells may increase the resistance to penetration of damaging intensive irradiance, thus minimizing photodamage effects (Rossato and Kolb 2012). This increased elongation of parenchyma cells has been attributed to higher soluble carbohydrate concentrations that act as osmoregulators, decreasing the cell water potential and promoting water entrance into the cells (Terashima et al 2006;Mengarda et al 2009).…”

Section: Discussionmentioning

confidence: 99%

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How does Cariniana estrellensis respond to different irradiance levels?

et al. 2018

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Based on reports that variables related to photosynthesis (net assimilatory ratio and chloroplast pigments) are more plastic than the morphological and biochemical variables in a climax tropical species, Cariniana estrellensis, under contrasting irradiance, we hypothesised that plasticity of gas exchange variables is higher in relation to growth, biochemical and anatomical variables. Plants that were 14 months old were subjected to 200 up to 2000 lmol m -2 s -1 of photo synthetically active radiation (PAR) for 140 days. Growth increased up to 1400 lmol m -2 s -1 PAR and then decreased at 2000 lmol m -2 s -1 PAR (full sunlight). This was related to the rate of photosynthesis (A) which showed the same tendency as photosystem II performance index (PI ABS ). The greater thickness of the secondary xylem at 1400 lmol m -2 s -1 PAR indicated a higher water conductance capacity. The decrease in specific leaf area, elongation of mesophyll cells, and increase in stomatal density observed at higher irradiances were associated with higher leaf fructose and sucrose concentrations. We concluded that the better growth in partial shade was due to higher photosynthetic capacity. On the other hand, photosynthesis was inhibited equally in full sun and deep shade. The high adjustment capacity of C. estrellensis to wide amplitudes of irradiance was provided by greater plasticity of gas exchange variables in relation to growth, anatomical, and biochemical variables.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

How does Cariniana estrellensis respond to different irradiance levels?

et al. 2018

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“…Despite the similar distribution of the parenchyma in both species, there was a variation in mesophyll thickness; G. polymorpha showed the highest thickness for these tissues, with well-developed palisade and spongy parenchyma. This strategy is commonly found in species subjected to high light intensities (Sefton et al 2002;Boeger et al 2006;Rossatto & Kolb 2010) and should promote good performance (carbon uptake and water economy) in such environments (Gratani et al 2006). Besides the value of the thickness of the mesophyll, the ratio between thickness of spongy parenchyma and palisade parenchyma can reflect a mechanism for optimizing light capture.…”

Section: Traitsmentioning

confidence: 99%

“…On the other hand, the quantitative anatomical data may suggest that the investment in the tissues may differ between the species according to the variation in light availability and that these differences may explain, at least in part, the physiological differences found between these two growth forms (Sefton et al 2002). Gochnatia polymorpha is a very plastic species in relation to leaf anatomy (Rossatto & Kolb 2010), so this plasticity may help to explain its distribution in several physiognomies of the Cerrado that differ in light availability (Durigan et al 1999). Gochnatia barrosii in turn can probably present plasticity, once it is able to grow not only in forest physiognomies but also in open Cerrado areas (Rossatto et al 2008).…”

Section: Traitsmentioning

confidence: 99%

Structural and functional leaf traits of two Gochnatia species from distinct growth forms in a sclerophyll forest site in Southeastern Brazil

Rossatto

Kolb

2012

Acta Bot. Bras.

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RESUMO(Atributos foliares estruturais e funcionais de duas espécies de Gochnatia, de formas distintas de crescimento, em uma floresta esclerófila do sudeste do Brasil). O gênero Gochnatia é comumente encontrado em diferentes fitofisionomias do Cerrado do Estado de São Paulo, crescendo desde ambientes mais abertos até áreas florestais mais fechadas. Aqui foram comparadas a anatomia foliar e alguns parâmetros ecofisiológicos de duas espécies do gênero Gochnatia, uma arbustiva (Gochnatia barrosii Cabrera) e a outra arbórea (Gochnatia polymorpha (Less.) Cabrera), ambas ocorrendo em área de cerradão na Estação Ecológica de Assis, SP. Encontraram-se diferenças estruturais qualitativas entre as espécies, com G. barrosii apresentando folhas anfiestomáticas, com epiderme unisseriada e G. polymorpha apresentando folhas hipoestomáticas, com epiderme múltipla ou hipoderme, na face adaxial. Além disso, as folhas de G. barrosii apresentaram menores valores para a espessura dos tecidos (com exceção da epiderme na face abaxial) e da folha em relação a G. polymorpha. Foram observadas diferenças na assimilação de CO 2 tanto em base de área quanto de massa seca foliar, além de diferenças na área foliar específica, sendo esta maior em G. barrosii. Apesar das folhas de G. barrosii possuírem estrutura bem menos escleromorfa do que as folhas de G. polymorpha, não foram encontradas diferenças na eficiência do uso de água. Os resultados sugerem que espécies de formas distintas de crescimento de um mesmo gênero possuem características foliares diferenciadas para lidar com as variações ambientais a que são submetidas. Palavras-chave: anatomia foliar, Cerrado, estômatos, trocas gasosas ABSTRACT(Structural and functional leaf traits of two Gochnatia species, with distinct growth forms, from a sclerophyll forest in Southeastern Brazil). Gochnatia is very common in different phytophysiognomies in the Cerrado of São Paulo State, occupying open and closed areas. In this study, we compared the leaf anatomy and some ecophysiological traits of two species of Gochnatia, one a shrub (Gochnatia barrosii Cabrera) and the other a tree (Gochnatia polymorpha (Less.) Cabrera), which both occur in an area of "cerradão" at the Estação Ecológica de Assis, SP. We found qualitative structural differences between the species, with G. barrosii presenting amphistomatic leaves with a uniseriate epidermis and G. polymorpha showing hypostomatic leaves and a multiple epidermis or hypodermis on the adaxial surface. Moreover, the G. barrosii leaves had lower values in tissue thickness (with the exception of the epidermis on the abaxial surface) and leaf thickness in relation to G. polymorpha. There were differences in CO 2 assimilation both in area and leaf dry mass basis, and differences in specific leaf area, which was higher in G. barrosii. Although the G. barrosii leaves were much less sclerophyllous than the G. polymorpha leaves, we found no differences in the efficiency of water use. The results suggest that plants from the same genus, but with distinct growth fo...

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“…This radiation can influence leaf morphology and physiology, with a greater leaf size and photosynthetic rate being generally observed in sun leaves in relation to their area (ROSSATTO et al 2010). Therefore, plant development may be affected (ROSSATTO; KOLB, 2010) because leaves are responsible for carbohydrate production, which in turn will compromise the production of fruits (TAIZ;ZEIGER, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of expansion time and sunlight radiation on the functional and anatomical traits of mango tree leaves

Azeredo

Mendes

Joko

et al. 2018

R. Agrogeoambiental

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The mango tree (Mangifera indica L.) is cultivated on a large scale in Brazil for economic purposes. Since the leaves, as the main photosynthetic organs, play an essential role in fruit production, the primary objective of the present study was to analyze comparatively the morphological characteristics of leaves at different stages of expansion and of leaves exposed to different levels of solar radiation. Leaves were collected at the beginning of expansion, during intermediate expansion and when completely expanded, and sun and shade leaves were compared. The individuals were adult plants without flowers and fruits located along the South Lake, Brasília. The leaves were analyzed for area, specific leaf area (SLA), thickness, water content and anatomical traits. Data were analyzed by ANOVA post hoc Tukey test to test the influence of leaf expansion time and by the T-test to determine the effect of radiation (α = 5%). Greater scleromorphy was observed in the completely expanded leaves compared to the leaves at the beginning of expansion, with lower water content and SLA in completely expanded leaves. Higher sclerophyll content was observed in sun leaves than in shade leaves, with lower SLA, greater leaf thickness and greater thickness of adaxial epidermis, palisade parenchyma and mesophyll in sun leaves. Based on these results, greater care is indicated regarding leaf management at the beginning of expansion and the management of shade leaves, since they are more susceptible to damage from herbivores. The objective of this management is to maximize fruit production.

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Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions

Cited by 54 publications

References 37 publications

How does Cariniana estrellensis respond to different irradiance levels?

How does Cariniana estrellensis respond to different irradiance levels?

Structural and functional leaf traits of two Gochnatia species from distinct growth forms in a sclerophyll forest site in Southeastern Brazil

Effect of expansion time and sunlight radiation on the functional and anatomical traits of mango tree leaves

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