Ácido salicílico em sementes de calêndula (Calendula officinalis L.) sob diferentes estresses

Carvalho, Patricia Reiners; Neto, Nelson Barbosa Machado; Custódio, Ceci Castilho

doi:10.1590/s0101-31222007000100016

Cited by 16 publications

(13 citation statements)

References 23 publications

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“…At negative osmotic potentials, 'LAG-Branquinha' obtained expressive germination in SA at -0.2 and -0.4 MPa, with 61.25 and 38.75% of germination, although there was difference between SA and DW at -0.4 MPa ( Figure 1E), which may indicate the induction of production of proteins of tolerance to the stress by the SA (Carvalho et al, 2007).…”

Section: Resultsmentioning

confidence: 97%

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Silva

Suassuna

Melo

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TSesame is an important crop in Northeast Brazil, where climate conditions require adapted genotypes and alternatives for plant defense against drought. This study aimed to evaluate the salicylic acid as drought attenuator in sesame genotypes. The experiment evaluated six genotypes (BRS Seda, CNPA-G2, CNPA-G3, CNPA-G4, LAG-Branquinha and LAGPretinha), five osmotic potentials (0, -0.2, -0.4, -0.6 and -0.8 MPa) and three seed treatments (soaking in distilled water, in salicylic acid and no treatment). CNPA-G4 is tolerant to drought in the germination stage. Salicylic acid at 10 -5 M induced tolerance to drought stress in sesame, but it is necessary to test other concentrations.Ácido salicílico como atenuador de estresse hídrico na germinação e no desenvolvimento inicial de gergelim R E S U M O O gergelim é uma importante cultura no Nordeste brasileiro, cujas condições de semiaridez exigem genótipos adaptados, além de alternativas para defesa da planta contra a seca. Assim, objetivou-se avaliar o ácido salicílico como atenuador do estresse hídrico em genótipos de gergelim. Foram estudados seis genótipos (BRS Seda, CNPA-G2, CNPA-G3, CNPA-G4, LAG-Branquinha e LAG-Pretinha); cinco potenciais osmóticos (0; -0,2; -0,4; -0,6 e -0,8 MPa) e três tratamentos das sementes (pré-embebição em água destilada; em ácido salicílico e sem embebição). O genótipo CNPA-G4 possui elevada capacidade de tolerância ao déficit hídrico, na fase de germinação. O ácido salicílico a 10 -5 M induziu tolerância ao estresse hídrico em gergelim, porém se necessita testar outras concentrações.

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Section: Resultsmentioning

confidence: 97%

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Silva

Suassuna

Melo

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…These results allow inferring that presence of SA, at the 1 mM concentration was sufficient to minimize the effect of salt stress on percent germination of the hybrid maize seeds. By using a SA solution at concentrations of 0.5 mM and 0.025 mM, which are below concentrations used in this study, other authors also have detected increases on percent germination of tomato (Solanum lycopersicum L.) seeds (Szepesi et al, 2005) as well as of pot marigold (Calendula officinalis L.) seeds (Carvalho et al, 2007). Thereby, the role of the salicylic acid in response to salt stress during seed germination is probably correlated to accumulation of the antioxidant enzymes proline and betaine (Deef, 2007) arising from the osmotic adjustment process, which provides resistance to the stress imposed.…”

Section: Resultsmentioning

confidence: 54%

Salicylic acid: physiological and biochemical changes in seeds and maize seedlings subjected to salt stress

Tonel¹,

Marini²,

Bandeira³

et al. 2013

J. Seed Sci.

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Several plant species have development limitations on saline soils; however under water stress situations salicylic acid (SA) may have defense function by acting as antioxidant. Thereby, this study was aimed at analyzing physiological changes occurring in maize seeds treated with SA and germinated on sodium chloride moistened substrate; as well as assessing the effect of antioxidant enzymes produced by the seedlings. To this, seeds were soaked into zero and 1 mM SA solutions, for 60 min., and germinated on different NaCl concentrations (0, 30, 90, and 180 mM), and afterwards evaluated for germination, germination speed index, initial growth, and effect of antioxidant enzymes on seedlings. For electrical conductivity test, the seeds were previously soaked in NaCl solutions with and without SA. The SA application has minimized damages induced by salt stress to maize seed germination by favoring their germination percent; however without SA was not able on maintaining seed viability over 90 mM. Seedling initial growth was impaired by increasing NaCl concentrations in substrate; and electric conductivity has shown low values for release of solutes in the presence of SA. Activity of antioxidant enzymes has increased until 30 mM NaCl concentration; however above such concentration activity of these enzymes was reduced. The SA maintains germination of corn seeds above 90 mM NaCl; however, generally it is not efficient to ensure vigor of seedlings.

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“…The greatest example of these phenolic compounds is the acetylsalicylic acid present in the plant, not only under water stress, but also under saline stress, at high or low temperatures or in the defense of the plant against the attack of pests or pathogens (Carvalho et al, 2007;Freitas et al, 2009).…”

Section: Dmentioning

confidence: 99%

Expression of NCED gene in colored cotton genotypes subjected to water stress

Souza

Batista

Pinheiro

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TConsidering that the NCED gene acts on the biosynthetic cascade of ABA, a hormone involved in the functioning of stomata and consequently in the regulation of transpiration, the aim of this research was to analyze the expression of this gene in colored cotton genotypes subjected to water stress at the beginning of plant growth. Four colored cotton genotypes were used, subjected to two managements, with and without water stress, beginning the treatments when the blade of the first true leaves reached an area that allowed the evaluation of gas exchange. For the studies of the expression of the NCED gene, via RT-qPCR, leaves were collected on three distinct dates: at 4 and 6 days of water stress, and after the plants regained their turgor. The differential expression of NCED was found in all genotypes, with higher levels of expression related to six days of water stress. When the stomatal conductance was around 25%, there was overexpression in the genotype CNPA 2009. Expressão do gene NCED em genótipos de algodoeiros coloridos submetidos a estresse hídrico R E S U M O Considerando que o gene NCED atua na cascata biossintética do ABA, hormônio envolvido no funcionamento dos estômatos e, consequentemente, na regulação da transpiração objetivou-se, com esta pesquisa, analisar a expressão desse gene em genótipos de algodão colorido submetidos a déficit hídrico no início do crescimento das plantas. Foram utilizados quatro genótipos de algodão colorido (CNPA 2009-6, CNPA 2009-11, BRS SAFIRA e CNPA 2009) submetidos a dois manejos sem e com estresse hídrico iniciando-se quando o limbo das primeiras folhas verdadeiras atingiu uma área que permitiu a avaliação de trocas gasosas. Para os estudos de expressão do gene NCED via RT-qPCR foram coletadas folhas em três datas distintas: aos quatro e seis dias de estresse hídrico e após as plantas recuperarem a turgescência. Em todos os genótipos foi constatada expressão diferencial de NCED com maior nível de expressão relativa aos seis dias de estresse; quando a condutância estomática estava em torno de 25% ocorreu superexpressão no genótipo CNPA 2009.13 seguido de CNPA 2009.6, BRS SAFIRA e em CNPA 2009.11 confirmando os dados obtidos na PCR semiquantitativa. O gene NCED está envolvido na resposta ao estresse hídrico na fase vegetativa de algodoeiro colorido.

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Ácido salicílico em sementes de calêndula (Calendula officinalis L.) sob diferentes estresses

Cited by 16 publications

References 23 publications

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Salicylic acid as attenuator of drought stress on germination and initial development of sesame

Salicylic acid: physiological and biochemical changes in seeds and maize seedlings subjected to salt stress

Expression of NCED gene in colored cotton genotypes subjected to water stress

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