Alterações anatômicas em folhas e raízes de Jatropha curcas L. cultivadas sob estresse salino

Melo, Gemima Manço de; Cunha, Patricia Carneiro da; Pereira, João Alves Ferreira; Willadino, Lília; Ulisses, Cláudia

doi:10.1590/s1806-66902011000300013

Cited by 9 publications

(6 citation statements)

References 5 publications

(7 reference statements)

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“…During the entire experiment, under salinity shock, the maintenance of calcium (Ca) crystals on the leaves of all the genotypes evaluated was observed, a result that differs from the studies of Melo et al (2011), which describes the disappearance of the drusen in the leaf mesophyll of J. curcas under salinity. The maintenance of the drusen on the leaf mesophyll as a function of salinity, described in this paper, can be explained by the low duration of exposure to the salt stress (i.e., salinity shock) or by the fact that in this study, the plants were irrigated with Hoagland solution plus NaCl and not only saline water as done in Melo et al (2011).…”

Section: Discussioncontrasting

confidence: 65%

“…These findings were clearly demonstrated in this paper, where there was a strong reduction in the growth and development of the plants and a strong reduction in the stomatal opening in the order to cope salinity shock. Melo et al (2011) describes that the leaf and roots morphoanatomy of J. curcas were modified when submitted to high salt concentrations. According to these authors, the palisade parenchyma was demonstrated to be bi-stratified, different from what was observed in this paper where the palisade parenchyma consisted of a single layer of compact and elongated cells.…”

Section: Discussionmentioning

confidence: 99%

“…Intraspecific genetic differences have an important potential to select tolerance mechanisms of the most diverse environmental stimuli, such as saline stress and water deficit. These phenotypic variations may be related, among other things, to morphoanatomical adaptations that optimize water use efficiency mechanisms (Munns and Tester 2008;Pompelli et al 2010a;Campos et al 2012;Hsie et al 2015), such as variations in stomatal size and density (Melo et al 2011). Changes in the size and distribution pattern of the stomata in J. curcas leaves were recently observed (Hsie et al 2015) where the authors compared J. curcas during the dry and rainy seasons and identified that in the dry season the leaves had a lower leaf area and higher stomatal density compared to those from the rainy season.…”

Section: Discussionmentioning

confidence: 99%

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Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Silva-Santos

Corte-Real

Dias-Pereira

et al. 2019

BJD

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To verify the possible morphological and ultrastructural differences in the Jatropha curcas leaves, in response to high-intensity salt stress, three genotypes were evaluated (CNPAE183, JCAL171, and CNPAE218). In all the genotypes, 750mM NaCl, added to the nutrient solution, was applied to test its salt tolerance. For the analysis, the leaves were collected at three time points: (i) before stress (time 0 hour); (ii) during stress time (time 50 hours); and (iii) in the recovery period (time 914 hours) when the stressed plants recovered and demonstrated measurements of net photosynthetic with values similar to those demonstrated by the control plants. We showed that regardless of the genotype, saline shock caused an increase in the thickness of the mesophyll, and after the removal of NaCl, the thicker mesophyll remained in the JCAL171 and CNPAE218 genotypes, while the values observed in the CNPAE183 genotype were similar to those before stress. Scanning electron microscopy indicated that the stomata of CNPAE183 are smaller and have a stomatal index higher than the values demonstrated in JCAL171 and CNPAE218. Therefore, among the genotypes analyzed, CNPAE183 demonstrates that it could be considered a promising genotype for future studies of genetic improvement that seek elite genotypes tolerant to salinity.

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Section: Discussioncontrasting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Silva-Santos

Corte-Real

Dias-Pereira

et al. 2019

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“…With the obtained results, it could be inferred that the luminous condition and the temperature promote anatomical changes in seedlings of J. curcas, being able to contribute to that seedlings with thicker leaf epidermis are more easily adapted to the condition of acclimatization. Similar features were observed for J. curcas plants subjected to different salt concentrations in ex vitro conditions (Melo et al, 2011). Another work showed the adaxial epidermis being thicker than that of the abaxial side (Ferreira et al, 2003).…”

Section: Resultssupporting

confidence: 69%

Leaf morpho-anatomy of Jatropha curcas in vitro: Response to light conditions and temperature

et al. 2017

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Jatropha curcas L. plant is adapted to diverse climatic conditions with high requirement of heat stroke and drought resistant, having a special position among the attractive crops to biofuel program. This species has been studied from the perspectives of plant breeding, biotechnology and development of production systems. However, there are few reports of research regarding its anatomical characteristics. Thus, the objective of this study was to evaluate the effects of different conditions of light and temperature on the germination in vitro of J. curcas embryo and describe the leaf structure of seedlings through anatomical and micromorphological parameters. Embryos were excised and cultured in test tubes containing 15 ml of MS medium and grown in different temperature (25 °C and 30 °C) and light conditions (white, red, far red, and absence of light). The cultures were kept in BOD germinators chambers, with a 16 h photoperiod. Phytotechnical, anatomical and micromorphological (via electron scanning microscopy) characteristics were measured. The species J. curcas has a higher germination speed index when grown at 30 ºC. There is an increased of number of normal seedlings in white light and this point characterizes the species as neutral photoblastic. J. curcas presents uniseriate epidermis, palisade unistratified parenchyma, and spongy parenchyma composed of irregular cells. It is an amphistomatic species, with more stomata on the abaxial surface.

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“…Alguns trabalhos relatam alterações anatômicas que os sais podem promover em raízes de pinhão-manso. Melo, Cunha, Pereira, Willadino e Ulisses (2011) comprovaram em seu trabalho que quando as raízes de pinhão-manso são submetidas ao estresse salino, apresentam maior lignificação das células xilemáticas e endodérmicas e redução no diâmetro e no número de elementos de vaso; além do mais, evidencia-se a presença de estrias de Caspary, contendo maior quantidade de lignina, com maior fortalecimento a barreira apoplástica para o fluxo de íons e de água (CASTRO, PEREIRA, & PAIVA 2009), sendo quanto maior a deposição de lignina mais difícil se torna a perda radial de oxigênio (COLMER, MUNNS, & FLOWERS, 2005), elemento fundamental no processo de exclusão de sódio em plantas submetidas ao estresse salino (MELO et al, 2011).…”

Section: Peso Seco Do Sistema Radicularunclassified

Desenvolvimento da vinagreira (Hibiscus sabdariffa Linn.) em função de seis níveis de salinidade da água de irrigação

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et al. 2019

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A qualidade da água é um dos fatores que ocasionam efeito negativo no desenvolvimento das culturas e afetam a produção, desta forma para a utilização da água de qualidade inferior na agricultura, deve-se utilizar um manejo racional, através de alternativas economicamente viáveis, de modo que a cultura desenvolva a produtividade esperada. Em vista disso, este ensaio teve o objetivo de avaliar o desenvolvimento de vinagreira em função de seis níveis de salinidade da água de irrigação. O trabalho foi realizado no período de novembro a janeiro de 2011, em casa de vegetação do IFCE – Campus de Sobral. O ensaio foi disposto no delineamento inteiramente casualizado (DIC), em esquema fatorial 6 x 8, com parcelas subdivididas no tempo, sendo seis concentrações salinas da água de irrigação (0,27 - testemunha; 1,5; 2,5; 3,5; 4,5 e 5,5 dS m-1), e oito épocas de avaliação (0, 7, 14, 21, 28, 35, 42 e 49 dias após o transplante), com cinco repetições cada. De posse dos resultados, verifica-se que a elevação da concentração de sais na água de irrigação, ocasionou uma redução no desenvolvimento inicial das mudas de vinagreira, ocasionando com a morte de plantas.

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Alterações anatômicas em folhas e raízes de Jatropha curcas L. cultivadas sob estresse salino

Cited by 9 publications

References 5 publications

Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Leaf morpho-anatomy of Jatropha curcas in vitro: Response to light conditions and temperature

Desenvolvimento da vinagreira (Hibiscus sabdariffa Linn.) em função de seis níveis de salinidade da água de irrigação

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