Effects of Silicon on Tolerance to Water Deficit and Heat Stress in Rice Plants (<i>Oryza sativa</i>L.), Monitored by Electrolyte Leakage

Agarie, Sakae; Hanaoka, Naomi; Ueno, Osamu; Miyazaki, Akira; Kubota, F.; Agata, Waichi; Kaufman, Peter B.

doi:10.1626/pps.1.96

Cited by 216 publications

(130 citation statements)

References 41 publications

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…Changes of cell membrane permeability in plants under stress condition can reflect the damage extent (Agarie et al, 1998). In previous research, MDA content was lower while more efficient radical scavenging enzymes were observed in plants.…”

Section: Discussionmentioning

confidence: 92%

Responses of Unsaturated Fatty Acid in Membrane Lipid and Antioxidant Enzymes to Chilling Stress in Sweet Sorghum (Sorghum bicolor (L.) Moench) Seedling

Guo¹,

Liu²,

Yang³

et al. 2016

JAS

View full text Add to dashboard Cite

Low temperature is a major factor limiting the productivity and geographical distribution of many plant species. In this study, we investigated the effect of chilling stress (10 o C) on seedling growth in two sweet sorghum (Sorghum bicolor (L.) Moench) inbred lines (M-81E and Roma). Results showed that the chilling resistance of M-81E was higher than that of Roma. The Fv/Fm in leaves of M-81E decreased less than that of Roma during chilling stress. After 24 h of chilling stress, the Fv/Fm of M-81E and Roma decreased by 24.3 and 45.8%, respectively. Fo was also affected significantly during chilling stress. Malondialdehyde (MDA), an indicator of lipid peroxidation caused by ROS, increased during chilling stress. The contents of MDA increased less in leaves of M-81E than that in Roma under chilling stress. The antioxidant enzymes (SOD and APX) activity of M-81E was higher than those of Roma during chilling stress. The unsaturated fatty acid content and the double bond index (DBI) of major membrane lipids of MGDG, DGDG, SQDG, PC, PE and PG of M-81E significantly increased after 24 h of chilling treatment (10 o C). The DBI of MGDG, DGDG, SQDG, PC and PG of Roma significantly decreased. These results showed that the chilling tolerance of M-81E was higher than that of Roma by increasing of unsaturated fatty acid in membrane lipid and powerful protective enzyme system at seedling stage.

show abstract

Section: Discussionmentioning

confidence: 92%

Responses of Unsaturated Fatty Acid in Membrane Lipid and Antioxidant Enzymes to Chilling Stress in Sweet Sorghum (Sorghum bicolor (L.) Moench) Seedling

Guo¹,

Liu²,

Yang³

et al. 2016

JAS

View full text Add to dashboard Cite

show abstract

“…Dentre os efeitos benéficos do silício em plantas acumuladoras deste elemento, pode-se destacar a redução da intensidade de inúmeras doenças de importância econômica (DATNOFF; RODRIGUES; SEEBOLD, 2007), que pode ocorrer por meio de barreira química como a produção de fenóis pelas plantas (RODRIGUES et al, 2003) ou por meio de barreira física como o aumento da espessura da parede celular em conseqüência da deposição de sílica nas células dos tecidos da epiderme (AGARIE et al, 1998a).…”

Section: Introductionunclassified

Deposição de sílica e teor de nitrogênio e silício em arroz

et al. 2013

View full text Add to dashboard Cite

ResumoA adubação nitrogenada é pratica importante para alcançar altas produtividades, entretanto doses elevadas de nitrogênio podem causar tombamento e tornar as plantas mais suscetíveis a doenças. Numerosos estudos têm demonstrado que muitas gramíneas acumulam silício em seus tecidos, e que a maior parte deste elemento é depositado na folha, o que funcionária como uma barreira mecânica a entrada de doenças. Entretanto elevadas doses de nitrogênio podem diminuir a deposição de sílica nas plantas. O objetivo deste trabalho foi avaliar o teor de nitrogênio e silício na parte aérea, e a deposição de sílica em folhas de plantas de arroz de terras altas em função das doses de Si e N. O delineamento experimental utilizado foi inteiramente casualizado, em esquema fatorial 3 x 2, com cinco repetições. Os tratamentos foram constituídos por três doses de N (5, 75 e 150 mg dm -3 de N) tendo como fonte a uréia e duas doses de Si (0 e 400 mg dm -3 de SiO 2 ) tendo como fonte o silicato de cálcio (Wollastonita). O incremento da adubação com uréia reduziu o teor de Si na planta de arroz e a deposição de sílica na parede externa das células da epiderme das folhas de arroz. Palavras-chave: Oryza sativa, adubação e anatomia vegetal AbstractThe nitrogen fertilization is an important practice to reach high productivity, however, nitrogen high level can cause lodging and make the plants more sensitive to disease. Numerous studies has demonstrate that a lot of grasses accumulate silicon at its tissues, and the biggest part of this element is deposited on the leaf, that would work like a mechanical barrier to diseases come in. However, high levels of nitrogen can reduce the silica deposition at the plants. The objective of this study was to evaluate silicon and nitrogen content in shoot and silica deposition in upland rice leaf as a result of Si and N levels. The experimental design used was completely randomized in factorial schema 3 x 2 with five replications. The treatments consisted from levels of N (5, 75 and 150 mg dm -3 of soil) in urea form and two levels of SiO 2 (0 e 400 mg dm -3 ) in calcium silicate form (Wollastonita). The increased of urea fertilization reduced the silicon content of rice plants and the silica deposition at the external cells wall the epidermal rice leafs.

show abstract

“…Certainly, these effects contributed to the greater shoot dry matter yield in wheat plants treated with Si soil application. Besides the more adequate plant architecture provided by the reduced LIA in wheat (Table 3), it seems that the improvement of water utilization in Si-fertilized rice, as observed by Agarie et al (1998), also contributed to a shoot dry matter increase. The leaf insertion angle and plant architecture, which are related to plant yield capacity (Keulen, 1986), and the preventive effect of Si against structural and functional deterioration of cell membranes observed in rice plants exposed to environmental stress (Agarie et al, 1998) may have similarly favored wheat plants supplied with Si soil application.…”

Section: Resultsmentioning

confidence: 96%

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils

Júnior

Fontes

Coelho³

et al. 2010

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

SUMMARYSpot bloth caused by Bipolaris sorokiniana is an important wheat desease mainly in hot and humid regions. The aim of this study was to evaluate the response of wheat to different sources and modes of Si application, as related to the severity of wheat spot blotch and plant growth, in two Si-deficient Latosols (Oxisols). An greenhouse experiment was arranged in a 2 x 5 factorial completely randomized design, with eight replications. The treatments consisted of two soils (Yellow Latosol and Red Latosol) and five Si supply modes (no Si application; Si applied as calcium silicate and monosilicic acid to the soil; and Si applied as potassium silicate or monosilicic acid to wheat leaves). No significant differences were observed between the two soils. When Si was applied to the soil, regardless the Si source, the disease incubation period, the shoot dry matter yield and the Si content in leaves were greater. Additionally, the final spot blotch severity was lower and the area under the spot blotch disease progress curve and the leaf insertion angle in the plant were smaller. Results of Si foliar application were similar to those observed in the control plants.Index terms: Triticum aestivum L., Bipolaris sorokiniana (Sacc. in Sorok.), plant nutrition, Si.(

show abstract

Effects of Silicon on Tolerance to Water Deficit and Heat Stress in Rice Plants (Oryza sativaL.), Monitored by Electrolyte Leakage

Cited by 216 publications

References 41 publications

Responses of Unsaturated Fatty Acid in Membrane Lipid and Antioxidant Enzymes to Chilling Stress in Sweet Sorghum (Sorghum bicolor (L.) Moench) Seedling

Responses of Unsaturated Fatty Acid in Membrane Lipid and Antioxidant Enzymes to Chilling Stress in Sweet Sorghum (Sorghum bicolor (L.) Moench) Seedling

Deposição de sílica e teor de nitrogênio e silício em arroz

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils

Contact Info

Product

Resources

About