Attenuation of low-temperature stress in rice seedlings

Grohs, Mara; Marchesan, Enio; Roso, Rodrigo; Moraes, Bibiana Silveira

doi:10.1590/1983-40632016v4640436

Cited by 12 publications

(11 citation statements)

References 22 publications

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“…Several studies reported the improvement of total phenolic, anthocyanins, and flavonoids content in Thai rice varieties during germination under the salinity (60-200 mM NaCl) (Chutipaijit et al, 2009(Chutipaijit et al, , 2011Daiponmak et al, 2010;Ghosh et al, 2011). The germination of cold sensitive rice seeds at 17 °C improved the antioxidant property of rice seedlings, especially lipid peroxidation, and superoxide dismutase activity, and further facilitated the accumulation of plant hormone gibberellic acid, which diminished the impact of cold stress (Grohs et al, 2016). The brown rice (cultivar Khao Hom Dam Sukhothai 2) germinated at 35 ± 0.5 °C exhibited the superior antioxidant property than the rice germinated at 30 ± 0.5 °C (Pitiwiwattanakul et al, 2011).…”

Section: Changes In the Phytochemical Content Of Gbr During Stress Comentioning

confidence: 99%

Optimization of conditions to achieve high content of gamma amino butyric acid in germinated black rice, and changes in bioactivities

et al. 2017

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The present study estimated the optimum germination conditions to achieve high content of Gamma-amino butyric acid (GABA) and other phytochemicals in Thai black rice cultivar Kum Payao (BR). The Box-Behnken design of response surface methodology was employed to optimize the germination conditions. The changes in the GABA, phytochemical content, impact of salt, and temperature stress variation on phytochemical content, and stability of GABA were studied. The results showed that 12 h of soaking at pH 7, followed by 36 h of germination was the optimum condition to achieve maximum GABA content (0.2029 mg/g of germinated BR (GBR)). The temperature (8 and 30 °C), and salt (50-200 mM NaCl) content affected the phytochemicals of GBR, especially GABA, and anthocyanins. Dbviously, the antioxidant capability, and enzyme (α-amylase and α-glucosidase) inhibiting nature of BR was significantly (P < 0.001) increased after germination. The storage of GBR at 4 °C significantly, preserved the GABA content (∼80%) for 45 days. Primarily, the current study revealed the changes in phytochemical content, and bioactivity of Thai black rice cr. Kum Payao during germination. More studies should be carried out on pharmacological benefits of GABA-rich GBR.Keywords: germinated rice; gamma-amino butyric acid; antioxidant; stress; stability.Practical Application: Dptimization of germination conditions to produce GABA-rich germinated rice for pharmaceutical applications.

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Section: Changes In the Phytochemical Content Of Gbr During Stress Comentioning

confidence: 99%

Optimization of conditions to achieve high content of gamma amino butyric acid in germinated black rice, and changes in bioactivities

et al. 2017

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“…Other reports have shown that antioxidant metabolites and enzymes also contribute to cold tolerance (Kuk et al, 2003;Grohs et al, 2016) and correlate with growth performance (Chakraborty and Bhattacharjee, 2015). Cells are the building blocks of the plant body and the regulatory units that integrate locally perceived chemical and physiological signals by genetically encoded molecular regulatory networks that ultimately control the growth process (Gonzalez et al, 2012;Kalve et al, 2014;Czesnick and Lenhard, 2015).…”

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confidence: 99%

Redox homeostasis in the growth zone of the rice leaf plays a key role in cold tolerance

Gázquez

AbdElgawad

Baggerman

et al. 2019

Journal of Experimental Botany

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We analysed the cellular and molecular changes in the leaf growth zone of tolerant and sensitive rice varieties in response to suboptimal temperatures. Cold reduced the final leaf length by 35% and 51% in tolerant and sensitive varieties, respectively. Tolerant lines exhibited a smaller reduction of the leaf elongation rate and greater compensation by an increased duration of leaf growth. Kinematic analysis showed that cold reduced cell production in the meristem and the expansion rate in the elongation zone, but the latter was compensated for by a doubling of the duration of cell expansion. We performed iTRAQ proteome analysis on proliferating and expanding parts of the leaf growth zone. We identified 559 and 542 proteins, of which 163 and 210 were differentially expressed between zones, and 96 and 68 between treatments, in the tolerant and sensitive lines, respectively. The categories protein biosynthesis and redox homeostasis were significantly overrepresented in the up-regulated proteins. We therefore measured redox metabolites and enzyme activities in the leaf growth zone, demonstrating that tolerance of rice lines to suboptimal temperatures correlates with the ability to up-regulate enzymatic antioxidants in the meristem and non-enzymatic antioxidants in the elongation zone.

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“…They are composed of gibberellin (which acts directly on the germination process and cell elongation), gibberellic acid (which increases the production of alpha-amylase at the level of gene transcription) and alpha-amylase and beta-amylase (which are enzymes responsible for the initial degradation of starch) (Taiz et al 2017). The use of biostimulants also boosted the germination of rice and maize seeds under heat stress (Grohs et al 2016, Carmo et al 2021.…”

Section: Resultsmentioning

confidence: 99%

Heat stress mitigation on the germination and initial development of carrot seedlings using plant growth regulators1

Guirra

Torres

Cardozo

et al. 2022

Pesqui. Agropecu. Trop.

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The adoption of technologies that allow the mitigation of environmental stresses, such as the use of regulators in seed treatment, is an alternative for crops in high temperatures regions. This study aimed to assess the heat stress mitigation on the germination and initial development of carrot seedlings using plant growth regulators. The study was divided into three experiments performed at the temperatures of 25, 30 and 35 °C. A 5 × 3 factorial arrangement was used, with fve carrot cultivars (Alvorada, Brasília, BRS Esplanada, Tellus and Tropical) and two products (Stimulate® and thiamethoxam), in addition to the control (untreated seeds). The following variables were evaluated: germination, first germination count, seedling length and dry mass. When the cultivars had their seeds treated with the plant growth regulators at 25 °C, the germination for the Tellus cultivar was 28 % higher than for the control, while, at 30 °C, the seed germination for BRS Esplanada and Tellus was twice as high as for the control, and showed a higher vigor than that of Alvorada, Brasília and Tropical. Overall, the thiamethoxam promoted increments at the initial development of carrot seedlings at 25 and 30 °C. However, the germination of the carrot cultivars was disrupted at 35 °C.

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Attenuation of low-temperature stress in rice seedlings

Cited by 12 publications

References 22 publications

Optimization of conditions to achieve high content of gamma amino butyric acid in germinated black rice, and changes in bioactivities

Optimization of conditions to achieve high content of gamma amino butyric acid in germinated black rice, and changes in bioactivities

Redox homeostasis in the growth zone of the rice leaf plays a key role in cold tolerance

Heat stress mitigation on the germination and initial development of carrot seedlings using plant growth regulators1

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