Tolerância à salinidade avaliada em genótipos de arroz cultivados in vitro

Benitez, Letícia Carvalho; Peters, José Antônio; Bacarin, Marcos Antônio; Köpp, Maurício Marini; Oliveira, Antônio Costa de; Magalhaes, A. M. de; Braga, Eugênia Jacira Bolacel

doi:10.1590/s0034-737x2010000300007

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…This behavior can explain the decrease in root growth compared to the aerial part. In contrast to the obtained results, Benitez et al, (2010) showed that growth in the aerial part in ten rice genotypes was more affected by salinity than root system growth, after 21 days of exposure to different NaCl concentrations. Similarly Balkan et al, (2015) when evaluating the rice cultivar Osmancik-97 in saline conditions observed a reduction in the number of roots.…”

Section: Morphological Response Of Brs Ag Cultivar To Salt Stresscontrasting

confidence: 99%

“…Similar results were observed for rice genotypes BRS Bojuru, BRS Talento and Cana Roxa, which belongs to Group Japônica; and BRS Atalanta, BRS Firmeza, BRS Pelota, BRS Agrisul, BRS Querência, BRS 7 "Taim" and BRS Ligeirinho belonging to the Indica group, derived to Embrapa Clima Temperado, cultivated in vitro under different NaCl concentrations (Benitez et al, 2010). For the studied genotypes, the concentrations above 136 mM inhibited germination, Being that the genotype BRS Bojuru is considered tolerant, whereas BRS 7 "Taim" and BRS Ligeirinho are the most sensitive to salinity.…”

Section: Germination Percentage Of Cultivar Brs Ag Under Different Nasupporting

confidence: 82%

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Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

Rossatto¹,

Maia²,

Amaral³

et al. 2018

Aust J Crop Sci

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About 20% of the cultivated land and almost half of the irrigated lands of the planet are affected by the salinization of the soil and the water. Rice cultivar BRS AG is the first grown for other purposes than human consumption and can be used in the production of ethanol and animal feed. The objective of this study was to evaluate the germination, morphological characteristics, proline accumulation, and the expression of the genes involved in the metabolism of proline in rice plants, cv. BRS AG, cultured in vitro under salt stress. The plants were cultivated in a culture MS medium with six different NaCl concentrations (0, 32, 68, 102, 136, 170 mM). The germination was evaluated at days 7 and 14, and morphological characteristics were analyzed only at day 21. For proline quantification and expression of the genes required for its metabolism (P5CS1, P5CS2, P5CR, OAT, P5CDH and PDH), two concentrations (136 mM and 0 mM) of NaCl were used, and the samples were collected at days 5, 10, 15, and 20. The results indicate that the growth of rice cv. BRS is completely impaired at 170 mM NaCl, and at 136 mM NaCl. Regarding proline content, in stressed plants, it was higher (1.24 mM g-1 MF) than in the control plants, and was directly related to a high expression observed for the P5CS2 (QR=5.50) and OAT (QR=5.44) genes at 20 days of stress, which explains the high proline concentration at this period. According to the results, rice cultivar BRS AG, is considered tolerant to salt stress.

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Section: Morphological Response Of Brs Ag Cultivar To Salt Stresscontrasting

confidence: 99%

Section: Germination Percentage Of Cultivar Brs Ag Under Different Nasupporting

confidence: 82%

Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

Rossatto¹,

Maia²,

Amaral³

et al. 2018

Aust J Crop Sci

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“…A diminuição no número de raízes acarreta diminuição na capacidade de absorção de água e nutrientes pela planta, diminuindo, consequentemente a quantidade de nutrientes disponíveis para serem translocados aos demais órgãos, ocasionando menor crescimento e desenvolvimento da planta (BENITEZ, 2008).…”

Section: Comprimento Radicularunclassified

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

Moreira

Sales

Eloi

et al. 2019

HOLOS

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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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“…Seeds of BRS Bojuru (subspecies japonica) and BRS Agrisul (subspecies indica) rice genotypes were used as plant material, characterized as tolerant and sensitive to salinity, respectively (Benitez et al, 2010).…”

Section: Sample Preparation and Statistical Designmentioning

confidence: 99%

Salt Induced Change of Gene Expression in Salt Sensitive and Tolerant Rice Species

Benitez¹,

Maia²,

Ribeiro³

et al. 2013

JAS

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The aim of this study was to quantify the expression of the SalT, LTP-Plant, CDPK and PP1 genes, described as responsive to salinity in rice genotypes, describe the promoter region of these genes and identify possible cis-elements that may be involved in the induction of gene expression under salinity. The cultivars BRS Bojuru (tolerant) and BRS Agrisul (sensitive) were subjected to 0, 12, 24, 36 and 48 h of exposure to salt. For the analysis of qRT-PCR, two detoxification/defense genes and two cell signal transduction genes were selected. In the identification of cis-elements, a region spanning 1.000 bp in the promoter region of genes was analyzed. The Os01g0348900-SalT gene presented an increase in quantification of the relative expression (QR) of 2.081 times in the sensitive and 63.7 times in the tolerant cultivar. The Os03g0251000-LTP gene showed a contrasting increase of the expression between the cultivars BRS Agrisul (QR = 11.0) and BRS Bojuru (QR = 1.54). The genes Os03g0688300-CDPK and Os02g0820000-PP1 apparently do not show response to salinity, since in most treatments, the QR values were lower than the control. Thirty-eight cis-elements distributed in the four analyzed genes were identified. Of these, six were found only in the Os01g0348900-SalT gene promoter, suggesting a possible involvement of these cis-elements in the induction of expression of this gene under salinity. Based on these results, it can be concluded that these genes do not maintain a direct relation with salinity tolerance, but with mechanisms that allow acclimation to this condition

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Tolerância à salinidade avaliada em genótipos de arroz cultivados in vitro

Cited by 7 publications

References 14 publications

Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

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

Salt Induced Change of Gene Expression in Salt Sensitive and Tolerant Rice Species

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