Acclimatization capacity of leaf traits of species co-occurring in restinga and seasonal semideciduous forest ecosystems

Pireda, Saulo; Oliveira, Dhiego da Silva; Borges, Neilor Lacôrte; Ferreira, Gabriel do Amaral; Barroso, Laura Mathias; Simioni, Priscila Fernanda; Vitória, Ângela Pierre; Cunha, Maura Da

doi:10.1016/j.envexpbot.2019.05.012

Cited by 17 publications

(12 citation statements)

References 88 publications

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Section: Discussionmentioning

confidence: 99%

“…Indeed, the very few studies that have tested the relationship between overall trait integration and plasticity have shown remarkably varying results, with very weak support to the existence of a functional trade-off between them. For instance, a recent study found a positive relationship between plasticity and integration in three tree species occurring in Restinga-like and seasonal semideciduous tropical forests (Pireda et al, 2019). Similarly, Zimmermann et al (2016) found that more correlated traits showed more plasticity in response to light availability in seedlings of an invasive tree, although this positive association was only found when integration was assessed in stressful shade conditions.…”

Section: The Complex Relationship Between Phenotypic Plasticity and Integrationmentioning

confidence: 97%

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Phenotypic integration does not constrain phenotypic plasticity: differential plasticity of traits is associated to their integration across environments

et al. 2021

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Understanding constraints to phenotypic plasticity is key given its role on the response of organisms to environmental change. It has been suggested that phenotypic integration, the structure of trait covariation, could limit trait plasticity. However, the relationship between plasticity and integration is far from resolved.Using a database of functional plasticity to drought of a Mediterranean shrub that included 20 ecophysiological traits, we assessed environmentally-induced changes in phenotypic integration and whether integration constrained the expression of plasticity, accounting for the within-environment phenotypic variation of traits. Furthermore, we provide the first test of the association between differential trait plasticity and trait integration across an optimum and a stressful environment.Phenotypic plasticity was positively associated with phenotypic integration in both environments, but this relationship was lost when phenotypic variation was considered. The similarity in the plastic response of two traits predicted their integration across environments, with integrated traits having more similar plasticity. Such variation in the plasticity of traits partly explained the lower phenotypic integration found in the stressful environment.We found no evidence that integration may constitute an internal constraint to plasticity. Rather, we present the first empirical demonstration that differences in plastic responses may involve a major reorganization of the relationships among traits, and challenge the notion that stress generally induces a tighter phenotype.

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Section: Discussionmentioning

confidence: 99%

Section: The Complex Relationship Between Phenotypic Plasticity and Integrationmentioning

confidence: 97%

Phenotypic integration does not constrain phenotypic plasticity: differential plasticity of traits is associated to their integration across environments

et al. 2021

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“…No entanto, as demais espécies estudadas apresentaram maior espessamento da cutícula, principalmente da face adaxial. As cutículas espessas proporcionam proteção contra altas intensidades luminosas (Cen & Ornman, 1993;Pireda et al, 2019). Marcati (2001) destacou que a espessura da cutícula não é, necessariamente, um fator de controle de permeabilidade, embora constitua um tema de grande importância.…”

Section: Discussionunclassified

Rizobactérias Promotoras do Crescimento de Plantas promovem ajustes anatômicos nas folhas de espécies nativas da Caatinga sob déficit hídrico

Jesus

Brito²,

Medeiros³

et al. 2022

J. Env. Anal. Progr.

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Em regiões semiáridas, o déficit hídrico é um fator que limita o estabelecimento das plântulas, as quais necessitam de estruturas morfoanatômicas mais eficientes. As Rizobactérias Promotoras do Crescimento de Plantas (RPCPs) promovem uma melhor performance em plantas cultivadas, entretanto, os registros são escassos para espécies nativas do semiárido. Objetivou-se avaliar as variações anatômicas de folhas de quatro espécies de plantas jovens de mata ripária da caatinga inoculadas com Azospirillum lipoferum cultivadas sob diferentes níveis de déficit hídrico. O experimento foi conduzido em viveiro coberto com sombrite 70%. Foram postas para germinar 240 sementes de cada espécie (Triplaris gardneriana, Handroanthus impetiginosus, Licania rigida e Myracrodruon urundeuva), sendo metade das sementes inoculadas com a cepa de Azospirillum lipoferum (BR-11080). Três níveis de irrigação foram adotados: 25, 50 e 100% da Evapotranspiração de Referência (ET0). Após três meses foi coletada uma folha de cada indivíduo para caracterização anatômica. A. lipoferum conferiu um maior espessamento do mesofilo foliar (0,65 a 57%), epiderme (50 a 95%), parênquima clorofiliano (40 a 80%) e espessura da parede do xilema (63%), especialmente nos tratamentos de maior estresse (25 e 50% da ET0). Verificou-se deposição dos componentes bioquímicos especialmente nas plantas com inóculo, nos tratamentos de maior estresse. Estes resultados mostram que as RPCPs conferem mudanças nas estruturas anatômicas de plantas jovens do semiárido, tornando-as mais tolerantes ao déficit hídrico e, portanto, apresentando forte potencial para uso em reflorestamento e recuperação de áreas degradadas.

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“…Tropical plant communities show variable environmental conditions, especially in microclimatic and edaphic factors. The coexistence and development of plant species is directly related to the potential that they have to adjust phenotypic characteristics in response to environmental variations (Pireda et al 2019). The ability of plants to alter their phenotype in different environments is defined as phenotypic plasticity (Sultan 2000).…”

Section: Introductionmentioning

confidence: 99%

Does the functional leaf anatomy of Justicia calycina (Acanthaceae) reflect variation across a canopy gradient in the Southern Brazilian Amazon?

et al. 2022

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Justicia calycina is a subshrub well distributed in northern South America. Despite its widespread occurrence, little is known about its anatomy and plasticity in different environments. Our study aimed to evaluate how leaf anatomical traits of J. calycina adjust in forest areas with variations in canopy openness in the Southern Amazon, Mato Grosso State, Brazil. Forest areas were: Open and Dense Ombrophilous Forest, and Seasonal Deciduous Forest (rocky outcrop). We performed anatomical measurements in leaves sampled on 10 individuals in each forest site, with the help of usual anatomy techniques. Foliar anatomy of J. calycina showed similar pattern among the studied forests, with significant difference (p<0.05) in four leaf traits among 22 studied: vascular bundle diameter, palisade parenchyma thickness, stomatal density and trichome density in adaxial epidermis. These leaf traits showed high plasticity index, with higher values in Dense Forest and in Deciduous Forest. Even though J. calycina showed overall little anatomical variation among forest types, the few attributes that differed are fundamental in the photosynthesis process. The adjustment in leaf anatomical traits under different luminosity conditions demonstrates a degree of phenotypic plasticity in the species, which contributes to its distribution in different forest phytophysiognomies in Brazilian Amazonia.

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Acclimatization capacity of leaf traits of species co-occurring in restinga and seasonal semideciduous forest ecosystems

Cited by 17 publications

References 88 publications

Phenotypic integration does not constrain phenotypic plasticity: differential plasticity of traits is associated to their integration across environments

Phenotypic integration does not constrain phenotypic plasticity: differential plasticity of traits is associated to their integration across environments

Rizobactérias Promotoras do Crescimento de Plantas promovem ajustes anatômicos nas folhas de espécies nativas da Caatinga sob déficit hídrico

Does the functional leaf anatomy of Justicia calycina (Acanthaceae) reflect variation across a canopy gradient in the Southern Brazilian Amazon?

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