Characterisation of the arabinose-rich carbohydrate composition of immature and mature marama beans (Tylosema esculentum)

Mosele, Minah Mmoni; Hansen, Åse; Engelsen, Søren B.; Diaz, Jerome; Sørensen, Iben; Ulvskov, Peter; Willats, William G.T.; Blennow, Andreas; Harholt, Jesper

doi:10.1016/j.phytochem.2011.03.027

Cited by 15 publications

(11 citation statements)

References 48 publications

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“…During maturation of marama seeds ( Tylosema esculentum ), a decrease in content of non‐cellulosic cell wall components was observed except arabinans that increased in abundance (Mosele et al . ). Similarly, the authors hypothesized that the plasticity of arabinans may play a role in the protection of the tissues during seed desiccation.…”

Section: Discussionmentioning

confidence: 97%

“…The authors suggested that the high level of RG-I-associated arabinan side chains may contribute to maintaining the cell wall flexibility under water stress (Moore, Farrant & Driouich 2008b). During maturation of marama seeds (Tylosema esculentum), a decrease in content of non-cellulosic cell wall components was observed except arabinans that increased in abundance (Mosele et al 2011). Similarly, the authors hypothesized that the plasticity of arabinans may play a role in the protection of the tissues during seed desiccation.…”

Section: Water Deficit Induces Changes In the Cell Wall Of Date Palm mentioning

confidence: 99%

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Effect of water deficit on the cell wall of the date palm (Phoenix dactylifera ‘Deglet nour’, Arecales) fruit during development

Gribaa

Dardelle

Lehner

et al. 2012

Plant Cell & Environment

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Date palm (Phoenix dactylifera) is an important crop providing a valuable nutrition source for people in many countries including the Middle East and North Africa. In recent years, the amount of rain in North Africa and especially in the Tunisian palm grove areas has dropped significantly. We investigated the growth and cell wall remodelling of fruits harvested at three key development stages from trees grown with or without water supply. During development, cell wall solubilization and remodelling was characterized by a decrease of the degree of methylesterification of pectin, an important loss of galactose content and a reduction of the branching of xylan by arabinose in irrigated condition. Water deficit had a profound effect on fruit size, pulp content, cell wall composition and remodelling. Loss of galactose content was not as important, arabinose content was significantly higher in the pectin-enriched extracts from non-irrigated condition, and the levels of methylesterification of pectin and O-acetylation of xyloglucan were lower than in irrigated condition. The lower levels of hydrophobic groups (methylester and O-acetyl) and the less intensive degradation of the hydrophilic galactan, arabinan and arabinogalactan in the cell wall may be implicated in maintaining the hydration status of the cells under water deficit.

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Section: Discussionmentioning

confidence: 97%

Section: Water Deficit Induces Changes In the Cell Wall Of Date Palm mentioning

confidence: 99%

Effect of water deficit on the cell wall of the date palm (Phoenix dactylifera ‘Deglet nour’, Arecales) fruit during development

Gribaa

Dardelle

Lehner

et al. 2012

Plant Cell & Environment

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show abstract

“…Cell walls of seeds dry out during maturation and a number of seed cell walls also contain higher arabinan levels than the vegetative tissue (Mosele et al, 2011 ; Gribaa et al, 2013 ). During germination the arabinan is largely metabolized and serves as a precursor for the synthesis of new wall polymers or arabino-galactan proteins upon activation to UDP-arabinose (Gomez et al, 2009 ).…”

Section: Changes In Cell Wall Composition Caused By Abiotic Stressmentioning

confidence: 99%

Cell wall remodeling under abiotic stress

2015

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Plants exposed to abiotic stress respond to unfavorable conditions on multiple levels. One challenge under drought stress is to reduce shoot growth while maintaining root growth, a process requiring differential cell wall synthesis and remodeling. Key players in this process are the formation of reactive oxygen species (ROS) and peroxidases, which initially cross-link phenolic compounds and glycoproteins of the cell walls causing stiffening. The function of ROS shifts after having converted all the peroxidase substrates in the cell wall. If ROS-levels remain high during prolonged stress, OH°-radicals are formed which lead to polymer cleavage. In concert with xyloglucan modifying enzymes and expansins, the resulting cell wall loosening allows further growth of stressed organs.

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“…Furthermore, DMF has a high pectin content, approx. 4.2 g/100 g (Mosele et al, 2011). Pectin is a strong hydrocolloid (Gambus, Sikora & Ziobro, 2007) due to its many hydroxyl groups.…”

Section: Flour Composition and Mixolab Characteristicsmentioning

confidence: 99%

“…Gas production in turn is also affected by the quantity of fermentable sugars present in the dough (Codină et al, 2013). The DMF-CS doughs would be expected to have lower gas production due to the fact that marama flour contain only tiny quantities of fermentable sugars such as sucrose (123.5 nmol/g) (Mosele et al, 2011) and most of the endogenous amylases would have been washed out during the CS isolation process. Flours which show low amylase activity produce low levels of fermentable sugars and hence yeast fermentation during proofing is limited (Codină et al, 2013).…”

Section: Dough Characteristics During Proofingmentioning

confidence: 99%

Potential of defatted marama flour-cassava starch composites to produce functional gluten-free bread-type dough

Nyembwe

Kock

Taylor

2018

LWT

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Marama bean is a drought-tolerant oilseed legume. Isolated marama bean protein has high foaming capacity, strong dough extensibility and good elasticity characteristics. The dough properties of composites of defatted marama flour (DMF) and cassava starch (CS) were compared with wheat flour dough with the aim of determining the potential of DMF as a functional nutritious gluten-free ingredient in bread. DMF-CS doughs with similar strength to wheat flour dough could be produced. However, they had much shorter Mixolab development time and stability. Alveography revealed that the DMF-CS doughs could inflate into a bubble, with the 33:67 DMF-CS ratio having the most similar bubble size, extensibility and deformation energy to wheat flour dough; with a higher proportion of DMF (57:43) these parameters were lower. Rheofermentometry showed that the DMF-CS composites could also hold gas produced by yeast fermentation. Confocal laser scanning microscopy revealed that as the proportion of DMF to CS was increased, the DMF protein tended to aggregate rather distribute throughout the dough, probably because the highly hydrophilic marama protein and pectin had great affinity for each other. Nevertheless, defatted marama flour appears to have considerable potential as a functional gluten replacement for making protein-and fibre-rich gluten-free bread.

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Characterisation of the arabinose-rich carbohydrate composition of immature and mature marama beans (Tylosema esculentum)

Cited by 15 publications

References 48 publications

Effect of water deficit on the cell wall of the date palm (Phoenix dactylifera ‘Deglet nour’, Arecales) fruit during development

Effect of water deficit on the cell wall of the date palm (Phoenix dactylifera ‘Deglet nour’, Arecales) fruit during development

Cell wall remodeling under abiotic stress

Potential of defatted marama flour-cassava starch composites to produce functional gluten-free bread-type dough

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