Regulation of phytosterol biosynthetic pathway during drought stress in rice

Kumar, Manoj; Mawlong, Ibandalin; Ali, Kishwar; Tyagi, Aruna

doi:10.1016/j.plaphy.2018.05.019

Cited by 41 publications

(24 citation statements)

References 35 publications

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“…Indeed, for the majority of wheat species, higher temperatures in 2012 induced an increase of β sitosterol and total sterols compared to 2011 without a decrease of campesterol (Table 4). This fact allows confirming that the climatic conditions prevailing during 2011 and 2012 have probably impacted the total sterol content by influencing the activity of enzymes involved in earlier stages of biosynthesis sterol pathway [4,44,45,48,50].…”

Section: Discussionmentioning

confidence: 58%

“…In contrast, durum wheat exhibited higher values than those showed in the HEALTHGRAIN network, and those reported in Italy [11,32,36]. These differences could be explained by both environmental and genotypic effects [23,25,26,[43][44][45][46]. Indeed, the studied accessions within each species were different between the both reports.…”

Section: Discussionmentioning

confidence: 59%

“…Weather conditions, high temperatures, and drought have been reported to influence sterol content by modifying the activity of enzymes involved in sterol biosynthesis pathway [9,44,45,48]. Indeed, in these reports, it was observed that higher temperatures or drought increased sterols content due to the augmentation of the activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase, called HMG-CoA reductase [45], which is a key enzyme in sterols biosynthesis. This fact was supported by the increase of sterol content and therefore total sterol content (Table 4).…”

Section: Discussionmentioning

confidence: 99%

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Tetraploid Wheats: Valuable Source of Phytosterols and Phytostanols

Merah

Mouloungui

2019

Agronomy

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Phytosterols are known as healthy compounds obtained mainly from oilseed crops. Cereals were also studied for their sterols content. Few insights have been devoted to other tetraploid species than emmer and durum wheats. This work examined phytosterol and phytostanol content in seed of six tetraploid wheat species cultivated during two successive years under rainfed organic conditions in Auch (near Toulouse, France). Sterols (free and esterified sterols) were measured by gas-chromatography-flame ionisation detector. Mean value of sterols + stanols content was 99.5 mg 100 g−1 DW. The main sterol was β-sitosterol. Results showed a year effect on sterol content, whatever the wheat species. This could be explained by the differences in climatic conditions prevailing during plant cycle and grain filling. A large variability for sterols content was found between species and within each species. Emmer wheat revealed the lowest values for all sterols and stanols. Higher values of sterols were obtained in durum wheat. This work is the first report studying T. carthlicum, T. polonicum, T. turgidum, T. timopheevi. These species exhibited intermediate values of sterol contents between emmer and durum wheats. Wheat tetraploid species showed interesting levels of sterols and could serve as a great source of these healthy compounds mainly in Mediterranean region where they are consumed as wholegrain. Variation in climatic conditions could help to manage the level of these secondary metabolites.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

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Tetraploid Wheats: Valuable Source of Phytosterols and Phytostanols

Merah

Mouloungui

2019

Agronomy

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“…The synthesis of sterols is considered an important method by which plants develop and survive under various types of stress conditions [67]. Sterols in plants form a basic structural unit of membranes that allows the membranes to be permeable to fluids and essential components [68].…”

Section: Effects Of Arbuscular Mycorrhizal Fungi On the Metabolic Promentioning

confidence: 99%

Metabolomics Analysis Reveals the Alkali Tolerance Mechanism in Puccinellia tenuiflora Plants Inoculated with Arbuscular Mycorrhizal Fungi

et al. 2020

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Soil alkalization is a major environmental threat that affects plant distribution and yield in northeastern China. Puccinellia tenuiflora is an alkali-tolerant grass species that is used for salt-alkali grassland restoration. However, little is known about the molecular mechanisms by which arbuscular mycorrhizal fungi (AMF) enhance P. tenuiflora responses to alkali stress. Here, metabolite profiling in P. tenuiflora seedlings with or without arbuscular mycorrhizal fungi (AMF) under alkali stress was conducted using liquid chromatography combined with time-of-flight mass spectrometry (LC/TOF-MS). The results showed that AMF colonization increased seedling biomass under alkali stress. In addition, principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA) demonstrated that non-AM and AM seedlings showed different responses under alkali stress. A heat map analysis showed that the levels of 88 metabolites were significantly changed in non-AM seedlings, but those of only 31 metabolites were significantly changed in AM seedlings. Moreover, the levels of a total of 62 metabolites were significantly changed in P. tenuiflora seedlings after AMF inoculation. The results suggested that AMF inoculation significantly increased amino acid, organic acid, flavonoid and sterol contents to improve osmotic adjustment and maintain cell membrane stability under alkali stress. P. tenuiflora seedlings after AMF inoculation produced more plant hormones (salicylic acid and abscisic acid) than the non-AM seedlings, probably to enhance the antioxidant system and facilitate ion balance under stress conditions. In conclusion, these findings provide new insights into the metabolic mechanisms of P. tenuiflora seedlings with arbuscular mycorrhizal fungi under alkali conditions and clarify the role of AM in the molecular regulation of this species under alkali stress.

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“…Britz et al (2007) reported increased GO concentration on 5 varieties studied when subjected to a 4.5 o C temperature increase. In another study, Kumar et al (2018) observed that rice subjected to water deficit stress increased its phytosterol concentration. Both studies suggested that the increase of GO can be a response to environmental stress.…”

Section: Rice Bran Go Contentmentioning

confidence: 93%

Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

et al. 2020

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Gamma-oryzanol is a compound present on rice bran, which has been studied for its bioactive properties, including its cytotoxic activity. The gamma-oryzanol biosynthesis occurs on the lipidic membrane of the plant and can be influenced by edaphoclimatic grown conditions. Two Portuguese rice varieties (Ceres and Maçarico) from 6 growing environments were analysed in order to explore the influence of the growing conditions on the gamma-oryzanol content, its constituents, and cytotoxic effect against 4 human tumour cell lines (NCI-H460, HeLa, HepG2, and MCF -7). The overall variability of gamma-oryzanol concentration was from 1.56 g / Kg to 3.19 g / Kg, Ceres reveals higher values than Maçarico; those concentrations also varied with the growing environment. The environment was also determinant for the individual concentration of the 3 gamma-oryzanol compounds (cycloartenyl ferulate, 24-methylenecycloartanyl ferulate, and campesteryl ferulate). A cytotoxic effect was observed for all the tested tumour cell lines and also varied with the growing environment.

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Regulation of phytosterol biosynthetic pathway during drought stress in rice

Cited by 41 publications

References 35 publications

Tetraploid Wheats: Valuable Source of Phytosterols and Phytostanols

Tetraploid Wheats: Valuable Source of Phytosterols and Phytostanols

Metabolomics Analysis Reveals the Alkali Tolerance Mechanism in Puccinellia tenuiflora Plants Inoculated with Arbuscular Mycorrhizal Fungi

Assessment of Gamma Oryzanol Variability, an Attractive Rice Bran Bioactive Compound

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