Effect of heat and drought stress on the structure and composition of arabinoxylan and β-glucan in wheat grain

Rakszegi, Marianna; Lovegrove, Alison; Balla, Krisztina; Láng, László; Bedö, Z.; Veisz, O.; Shewry, Peter R.

doi:10.1016/j.carbpol.2013.12.005

Cited by 82 publications

(52 citation statements)

References 43 publications

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“…Similarly, inconsistent effects of drought on hemicellulose content were previously reported (Al-Hakimi, 2006;Moore et al, 2008;Jiang et al, 2012;Emerson et al, 2014;Rakszegi et al, 2014), whereas in this study, drought-treated plants of all genotypes consistently had a significantly higher content of hemicellulosic polysaccharides compared to their respective control plants. Some of the discrepancies may also be explained by a difference in the duration of the applied drought treatment.…”

Section: Drought Reduces Cell Wall and Cellulose Content While Incresupporting

confidence: 70%

“…Osmolytes are solutes formed to aid the maintenance of osmotic equilibrium in the cell under dry growing conditions, and plant stress due to water deficit is associated with a disturbance of the osmotic equilibrium of cells. The production of osmolytes at the expense of cellulose biosynthesis (or financed by cellulose deconstruction) is well reported in the literature (Guenni et al ., ; Piro et al ., ; Vincent et al ., ; Al‐Hakimi, ; Moore et al ., ; Hu et al ., ; Jiang et al ., ; Meibaum et al ., ; Emerson et al ., ; Rakszegi et al ., ). The fact that in stem tissue, the reduction in cellulose is much more apparent than in leaf tissue may indicate that in most plants, the production of osmolytes in stems is more associated with a concomitant decrease in cell wall cellulose than in leaves.…”

Section: Discussionmentioning

confidence: 97%

“…Studies that have investigated biochemical changes in cell wall composition consistently report a decrease in cellulose content upon drought stress (Frei, 2013). However, both increases and decreases in contents of lignin and hemicellulosic polysaccharides upon drought stress are reported in different crops and plant tissues (Guenni et al, 2002;Vincent et al, 2005;Al-Hakimi, 2006;Moore et al, 2008;Hu et al, 2009;Jiang et al, 2012;Meibaum et al, 2012;Emerson et al, 2014;Rakszegi et al, 2014). Therefore, it is yet largely unknown how water deficits affect biomass quality of bioenergy crops.…”

Section: Introductionmentioning

confidence: 99%

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Impact of drought stress on growth and quality of miscanthus for biofuel production

et al. 2016

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This is the author accepted manuscript. The final version is available from Wiley Open Access via http://dx.doi.org/10.1111/gcbb.12382Miscanthus has a high potential as a biomass feedstock for biofuel production. Drought tolerance is an important breeding goal in miscanthus as water deficit is a common abiotic stress and crop irrigation is in most cases uneconomical. Drought may not only severely reduce biomass yields, but also affect biomass quality for biofuel production as cell wall remodeling is a common plant response to abiotic stresses. The quality and plant weight of 50 diverse miscanthus genotypes were evaluated under control and drought conditions (28 days no water) in a greenhouse experiment. Overall, drought treatment decreased plant weight by 45%. Drought tolerance ? as defined by maintenance of plant weight - varied extensively among the tested miscanthus genotypes and ranged from 30 to 110%. Biomass composition was drastically altered due to drought stress, with large reductions in cell wall and cellulose content and a substantial increase in hemicellulosic polysaccharides. Stress had only a small effect on lignin content. Cell wall structural rigidity was also affected by drought conditions; substantially higher cellulose conversion rates were observed upon enzymatic saccharification of drought-treated samples with respect to controls. Both cell wall composition and the extent of cell wall plasticity under drought varied extensively among all genotypes, but only weak correlations were found with the level of drought tolerance, suggesting their independent genetic control. High drought tolerance and biomass quality can thus potentially be advanced simultaneously. The extensive genotypic variation found for most traits in the evaluated miscanthus germplasm provides ample scope for breeding of drought-tolerant varieties that are able to produce substantial yields of high quality biomass under water deficit conditions. The higher degradability of drought-treated samples makes miscanthus an interesting crop for the production of second generation biofuels in marginal soilspublishersversionPeer reviewe

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Section: Drought Reduces Cell Wall and Cellulose Content While Incresupporting

confidence: 70%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Impact of drought stress on growth and quality of miscanthus for biofuel production

et al. 2016

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“…The present results had the same behaviour of the ʽSuperbʼ spring wheat variety studied by Zhang et al (2010) but they obtained higher levels of arabinoxylans than the current ones, ranging from 9.76 to 12.6% at different temperature regimes. In addition, Rakszegi et al (2014) also observed increasing levels of arabinoxylans in Magma and Fatima-2 wheat varieties with 27.05 and 28.65%, respectively.…”

Section: Resultsmentioning

confidence: 68%

Water Stress Effect on Cell Wall Components of Maize (<i>Zea mays</i>) Bran

et al. 2016

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In México, around 82% of the total production of maize is grown under rainfed conditions leading to a water stress environmen affects physiologic and biochemical process of the plant. Maize bran is a composited plant material consisting mainly in al and pericarp; the cell walls of these tissues are composed of proteins, non potential bioactive substances for human nutrition. In this research the bran of three genotypes of maize phenols and phenolic acids was performed in the bran of development stage increased protein levels of content, water stress increase increased in water stress treatment at levels of 1.28, 2.26 and 3.66% in treatment decreased the levels of total phenols and hydroxycinnamic acids in the three maize hybrids analysed. Reduction of t was 35.34, 5.59 and 31.57% for acids decreased 17. 74, 23.93, 29.83% in

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“…Variations in their relative quantities and in their fine structure, as a function of growth conditions, have been reported (Vogel ; Rakszegi et al . ). Yet, the cell walls from cereal leaves have been scarcely studied.…”

Section: Introductionmentioning

confidence: 97%

Changes in apoplastic peroxidase activity and cell wall composition are associated with cold‐induced morpho‐anatomical plasticity of wheat leaves

Lorenzo¹,

Pinedo

Equiza

et al. 2018

Plant Biol J

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Temperate grasses, such as wheat, become compact plants with small thick leaves after exposure to low temperature. These responses are associated with cold hardiness, but their underlying mechanisms remain largely unknown. Here we analyse the effects of low temperature on leaf morpho-anatomical structure, cell wall composition and activity of extracellular peroxidases, which play key roles in cell elongation and cell wall thickening, in two wheat cultivars with contrasting cold-hardening ability. A combined microscopy and biochemical approach was applied to study actively growing leaves of winter (ProINTA-Pincén) and spring (Buck-Patacón) wheat developed under constant warm (25 °C) or cool (5 °C) temperature. Cold-grown plants had shorter leaves but longer inter-stomatal epidermal cells than warm-grown plants. They had thicker walls in metaxylem vessels and mestome sheath cells, paralleled with accumulation of wall components, predominantly hemicellulose. These effects were more pronounced in the winter cultivar (Pincén). Cold also induced a sharp decrease in apoplastic peroxidase activity within the leaf elongating zone of Pincén, and a three-fold increase in the distal mature zone of the leaf. This was consistent with the enhanced cell length and thicker cell walls in this cultivar at 5 °C. The different response to low temperature of apoplastic peroxidase activity and hemicellulose between leaf zones and cultivar types suggests they might play a central role in the development of cold-induced compact morphology and cold hardening. New insights are presented on the potential temperature-driven role of peroxidases and hemicellulose in cell wall dynamics of grasses.

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Effect of heat and drought stress on the structure and composition of arabinoxylan and β-glucan in wheat grain

Cited by 82 publications

References 43 publications

Impact of drought stress on growth and quality of miscanthus for biofuel production

Impact of drought stress on growth and quality of miscanthus for biofuel production

Water Stress Effect on Cell Wall Components of Maize (<i>Zea mays</i>) Bran

Changes in apoplastic peroxidase activity and cell wall composition are associated with cold‐induced morpho‐anatomical plasticity of wheat leaves

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