Principal component analysis of changes due to water stress for some osmolytes, pigments and antioxidant enzymes in Gmelina arborea Robx. Leaves from trees planted in northern Colombia

Crespo, Sandra C.; Moreno-Chacón, Andrés Leonardo; Rojas, Andrea; Melgarejo, Luz Marina

doi:10.1590/s0103-50532011001200006

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Principal component analysis (PCA) was pattern recognition technique used in this work. PCA allows exploring and analyzing the data structure, relationship between samples, variables, and correlations between variables [ 31 ]. PCA was done using XLSTAT.…”

Section: Methodsmentioning

confidence: 99%

Seed Antioxidants Interplay with Drought Stress Tolerance Indices in Chilli (Capsicum annuum L) Seedlings

Sahitya¹,

Krishna²,

Deepthi³

et al. 2018

BioMed Research International

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Altering climatic conditions and water stress drastically affects the chilli crop yield. In this scenario we adapted a strategic approach for screening of elite chilli genotypes, by exploring role of seed antioxidants in stress tolerance during vegetative phase. A total of 20 chilli genotypes' seed antioxidant potential and its effect on water stress tolerance were studied at three water regimes, namely, control (100% Field Capacity), moderate (80% Field Capacity), and severe (60% Field Capacity) stress conditions. Drought tolerance traits relative water content, chlorophyll content, and activities of superoxide dismutase and catalase enzymes were measured. A strong correlation was observed between seed antioxidants and water stress tolerant traits in seedlings. Genotypes KCa-5, KCa-6, and KCa-10 showed low quantity of H2O2 and Malondialdehyde in seeds and maintained high membrane integrity and chlorophyll content in seedlings. High content of proline in KCa-5, KCa-7, and KCa-10 seeds retained high relative water content at seedling stage under severe water stress. Present work reveals genotypic differences of hot pepper to different water regimes. Based on Principal Component Analysis (PCA) of seed antioxidant variables and drought tolerance indices twenty genotypes segregated into three clusters, namely, drought tolerant and susceptible and moderately tolerant.

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Section: Methodsmentioning

confidence: 99%

Seed Antioxidants Interplay with Drought Stress Tolerance Indices in Chilli (Capsicum annuum L) Seedlings

Sahitya¹,

Krishna²,

Deepthi³

et al. 2018

BioMed Research International

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“…Os teores de clorofila a, clorofila b e carotenoides também podem ser influenciados pelas características fenotípicas e adaptativas próprias de cada espécie, bem como pela disponibilidade de água no solo (CRESPO et al, 2011). No caso das árvores avaliadas na presente pesquisa, observando-se o fato de que a região semiárida apresenta um período seco de, aproximadamente, sete a nove meses, faz-se necessário o uso da irrigação, que condiciona as respostas fisiológicas da planta em relação às variáveis avaliadas.…”

Section: Influência Da Deposição De Particulados Nos Pigmentos Fotossunclassified

Acúmulo De Particulados Atmosféricos E Sua Influência Nos Pigmentos Fotossintéticos De Duas Espécies Arbóreas Na Cidade De Patos-Pb, Brasil

Zea-Camaño

Souto

Freire

et al. 2017

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ResumoPartículas atmosféricas contaminantes em áreas urbanas associadas principalmente com a queima de combustíveis fosseis se depositam, em parte, na superfície das folhas das árvores. Isso promove alterações físicas nas plantas que podem ser analisadas por meio de suas respostas metabólicas. Este estudo objetivou avaliar a eficiência no acúmulo de particulados atmosféricos pela folhagem, assim como determinar a influência dos particulados nos pigmentos fotossintéticos clorofila a e b e carotenoides em árvores de Tabebuia aurea (Silva Manso) Benth. & Hook. f. ex S. Moore e Azadirachta indica A. Juss. localizadas em praças públicas na cidade de Patos, PB. Foram selecionadas árvores localizadas em dez praças públicas com alto e baixo fluxo veicular. O acúmulo de particulados atmosféricos nas folhas das árvores foi quantificado em laboratório e correlacionado com os resultados do teor dos pigmentos fotossintéticos. A determinação dos teores de clorofila a e b e carotenoides foi realizada segundo o método de Lichtenthaler e Buschmann com leitura em espectrofotômetro. Foi aplicado o teste t (p < 0,05) para comparação de médias e calculado o coeficiente de correlação de Pearson para avaliar as interações entre as variáveis. Os resultados evidenciam que a espécie T. aurea é mais eficiente do que A. indica na captura de partículas contaminantes suspensas no ar através de sua folhagem. Não foi demostrada uma tendência clara da influência do acúmulo de particulados atmosféricos na clorofila a e b e carotenoides, assim como da influência do fluxo veicular na retenção de particulados atmosféricos por ambas espécies. Palavras-chave: Poluição atmosférica; fotossíntese; arborização urbana; serviços ecossistêmicos; semiárido brasileiro.Abstract Contaminant atmospheric particles in urban areas associated with the burning of fossil fuels are deposited in part on the surface of the trees' leaves; this promotes physical changes in the plants that can be analyzed through their metabolic responses. This study aimed to evaluate the efficiency of the accumulation of atmospheric particulates in the foliage as well as to determine the influence of the particulates in the photosynthetic pigments chlorophyll a and b and carotenoids in Tabebuia aurea (Silva Manso) Benth. & Hook. f. ex S. Moore and Azadirachta indica A. Juss. located in public squares, in the city of Patos, PB. Trees located in public places with both high and low vehicle traffic were selected. The accumulation of atmospheric particulates in the trees' leaves was quantified in laboratory and correlated with the results of the content of the photosynthetic pigments. The determination of the levels of chlorophyll a and b and carotenoids was performed according to the method of Lichtenthaler and Buschmann with a spectrophotometer reading. The t test was used (p <0.05) to compare means and the Pearson correlation coefficient was calculated to evaluate the interactions between the variables. The results show that the T. aurea species is more efficient than A. indica at capturing...

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“…These osmolytes play an osmoprotective role, maintaining the fluidity of plasma membranes and the proper activity of enzymes [32]. The content of photosynthetic pigments varies according to the availability of water and nutrients [33,34], generating changes in the photosynthetic rates of species in semi-arid environments. It has been observed that carotenoids play an important role in the adaptation of species to water deficits and to high light intensities since they are involved in mechanisms of excess energy dissipation to avoid photoinhibition of the photosynthetic system [29,33].…”

Section: Introductionmentioning

confidence: 99%

“…The content of photosynthetic pigments varies according to the availability of water and nutrients [33,34], generating changes in the photosynthetic rates of species in semi-arid environments. It has been observed that carotenoids play an important role in the adaptation of species to water deficits and to high light intensities since they are involved in mechanisms of excess energy dissipation to avoid photoinhibition of the photosynthetic system [29,33]. Additionally, foliar anatomical characteristics are used to evaluate the ability of species to adapt to different environments [17].…”

Section: Introductionmentioning

confidence: 99%

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

Toro-Tobón¹,

Alvarez-Flórez²,

Mariño-Blanco³

et al. 2022

Plants

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Semi-arid environments characterized by low rainfall are subject to soil desertification processes. These environments have heterogeneous landscapes with patches of vegetation known as resource islands that are generated by nurse species that delay the desertification process because they increase the availability of water and nutrients in the soil. The study aimed to characterize some foliar physiological, biochemical, and anatomical traits of three nurse tree species that form resource islands in the semi-arid environment of La Guajira, Colombia, i.e., Haematoxylum brasiletto, Pithecellobium dulce, and Pereskia guamacho. The results showed that H. brasiletto and P. dulce have sclerophyllous strategies, are thin (0.2 and 0.23 mm, respectively), and have a high leaf dry matter content (364.8 and 437.47 mg/g). Moreover, both species have a high photochemical performance, reaching Fv/Fm values of 0.84 and 0.82 and PIABS values of 5.84 and 4.42, respectively. These results agree with the OJIP curves and JIP parameters. Both species had a compact leaf with a similar dorsiventral mesophyll. On the other hand, P. guamacho has a typical succulent, equifacial leaf with a 97.78% relative water content and 0.81 mm thickness. This species had the lowest Fv/Fm (0.73) and PIABS (1.16) values and OJIP curve but had the highest energy dissipation value (DIo/RC).

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Principal component analysis of changes due to water stress for some osmolytes, pigments and antioxidant enzymes in Gmelina arborea Robx. Leaves from trees planted in northern Colombia

Cited by 5 publications

References 2 publications

Seed Antioxidants Interplay with Drought Stress Tolerance Indices in Chilli (Capsicum annuum L) Seedlings

Seed Antioxidants Interplay with Drought Stress Tolerance Indices in Chilli (Capsicum annuum L) Seedlings

Acúmulo De Particulados Atmosféricos E Sua Influência Nos Pigmentos Fotossintéticos De Duas Espécies Arbóreas Na Cidade De Patos-Pb, Brasil

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

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