Graminan breakdown by fructan exohydrolase induced in winter wheat inoculated with snow mold

Kawakami, Akira; Yoshida, Midori

doi:10.1016/j.jplph.2011.09.003

Cited by 32 publications

(25 citation statements)

References 56 publications

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“…Therefore, we assumed that the higher production of fructans in the Indonesian shallots was closely related to cultivation conditions. It was suggested that the high fructan content of these shallots is a kind of plant-defense mechanism against fungal and pathogenic attacks (Kawakami and Yoshida, 2012;Van den Ende et al, 2004). Based on Brewster (2008), the degree of polymerization (DP) of fructans in bulb onions and shallots is up to 20.…”

Section: Discussionmentioning

confidence: 99%

Comparative Study on Phytochemical Variations in Japanese F<sub>1</sub> Varieties of Bulb Onions and South-East Asian Shallot Landraces

et al. 2018

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Wide-ranging varieties and/or strains of bulb onions (Allium cepa Common onion group) and shallots (A. cepa Aggregatum group) were utilized to understand the variation in chemical compounds responsible for their taste. The bulb samples of 10 F 1 commercial onion varieties (seven short-day and three long-day varieties) from Japan and 12 shallot landraces from abroad (Vietnam: three landraces; Indonesia: nine landraces) were collected as plant materials once a year in 2014 and 2015. The contents of S-alk(en)yl-L-cysteine sulfoxides, total flavonoids, and soluble sugars-including fructose, glucose, sucrose, and fructans-were determined to find differences between bulb onions and shallots, as well as to detect variations among varieties and/or landraces. While a principal component analysis (PCA) based on the results from both 2014 and 2015 could clearly discriminate shallots from bulb onions from a phytochemical perspective, bulb onions mainly had higher monosaccharides than shallots. By contrast, shallots produced more disaccharides than bulb onions. In most cases, regression analyses using the numerical data of the chemical compounds found in bulb onions and shallots suggested year-year correlations between 2014 and 2015. The flavonoid and PeCSO (S-(1-propenyl)-Lcysteine sulfoxide: isoalliin) contents in shallots were higher than those detected in bulb onions, which indicated the stronger pungent and bitter taste could be attributable to excess amounts of these compounds in this tropical plant.

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Section: Discussionmentioning

confidence: 99%

Comparative Study on Phytochemical Variations in Japanese F<sub>1</sub> Varieties of Bulb Onions and South-East Asian Shallot Landraces

et al. 2018

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“…High expression levels of the 1-FEH isoform are associated with graminan degradation, which is necessary to maintain the carbon flow required for grain filling [61], [62]. Under WS conditions, the relative expression of the 1-FEHw2 gene in genotype ‘LE 2384’ was positively correlated with Suc (Table 3), and in ‘Fontagro 69’, the 1-FEHw2 and 6-FEH genes were positively correlated with Fru (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Stem carbohydrate dynamics and expression of genes involved in fructan accumulation and remobilization during grain growth in wheat (Triticum aestivum L.) genotypes with contrasting tolerance to water stress

et al. 2017

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The genetic and physiological mechanisms underlying the relationship between water-soluble carbohydrates (WSC) and water stress tolerance are scarcely known. This study aimed to evaluate the main WSC in stems, and the expression of genes involved in fructan metabolism in wheat genotypes growing in a glasshouse with water stress (WS; 50% field capacity from heading) and full irrigation (FI; 100% field capacity). Eight wheat genotypes (five tolerant and three susceptible to water stress) were evaluated initially (experiment 1) and the two most contrasting genotypes in terms of WSC accumulation were evaluated in a subsequent experiment (experiment 2). Maximum accumulation of WSC occurred 10–20 days after anthesis. Under WS, the stress-tolerant genotype exhibited higher concentrations of WSC, glucose, fructose and fructan in the stems, compared to FI. In addition, the stress-tolerant genotype exhibited higher up-regulation of the fructan 1-fructosyltransferase B (1-FFTB) and fructan 1-exohydrolase w2 (1-FEHw2) genes, whereas the susceptible cultivar presented an up-regulation of the fructan 6-fructosyltransferase (6-SFT) and fructan 1-exohydrolase w3 (1-FEHw3) genes. Our results indicated clear differences in the pattern of WSC accumulation and the expression of genes regulating fructan metabolism between the tolerant and susceptible genotypes under WS.

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“…Snow molds are fungi with the ability to infect plants under snow at around 0°C (Gaudet and Laroche, 1997). Resistant wheat cultivars display higher fructan levels toward early winter and lower fructan degradation under snow in comparison to susceptible cultivars (Yoshida et al, 1998; Iriki et al, 2005; Nishio et al, 2008; Kawakami and Yoshida, 2012). …”

Section: Fructans Damp Signaling and Cross-tolerancementioning

confidence: 96%

Fructans As DAMPs or MAMPs: Evolutionary Prospects, Cross-Tolerance, and Multistress Resistance Potential

2017

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This perspective paper proposes that endogenous apoplastic fructans in fructan accumulating plants, released after stress-mediated cellular leakage, or increased by exogenous application, can act as damage-associated molecular patterns (DAMPs), priming plant innate immunity through ancient receptors and defense pathways that most probably evolved to react on microbial fructans acting as microbe-associated molecular patterns (MAMPs). The proposed model is placed in an evolutionary perspective. How this type of DAMP signaling may contribute to cross-tolerance and multistress resistance effects in plants is discussed. Besides apoplastic ATP, NAD and fructans, apoplastic polyamines, secondary metabolites, and melatonin may be considered potential players in DAMP-mediated stress signaling. It is proposed that mixtures of DAMP priming formulations hold great promise as natural and sustainable alternatives for toxic agrochemicals.

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Graminan breakdown by fructan exohydrolase induced in winter wheat inoculated with snow mold

Cited by 32 publications

References 56 publications

Comparative Study on Phytochemical Variations in Japanese F<sub>1</sub> Varieties of Bulb Onions and South-East Asian Shallot Landraces

Comparative Study on Phytochemical Variations in Japanese F<sub>1</sub> Varieties of Bulb Onions and South-East Asian Shallot Landraces

Stem carbohydrate dynamics and expression of genes involved in fructan accumulation and remobilization during grain growth in wheat (Triticum aestivum L.) genotypes with contrasting tolerance to water stress

Fructans As DAMPs or MAMPs: Evolutionary Prospects, Cross-Tolerance, and Multistress Resistance Potential

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