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Achene mucilage formation process and extrusion from hydrated pericarp of Mirabilis himalaica

Horticultural Plant Journal 2022年第2期8卷 251-260页

作者： Qingqing Huang Lu Zhang Xiaozhong Lan Yuzhen Chen Cunfu Lu National Engineering Laboratory for Tree Breeding College of Biological Sciences and BiotechnologyBeijing Forestry UniversityBeijing 100083China The Provincial and Ministerial Co-founded Collaborative Innovation Center for R&D in Tibet Characteristic Agricultural and Animal Husbandry Resources Tibet Agriculture and Animal Husbandry UniversityNyingchi 860000China

Myxospermy is an important feature of achenes of the alpine plant Mirabilis himalaica,and the achene mucilage increases the germination rate and early seedling growth during exposure to abiotic stresses,which has important functions that allow *** to survive the extreme climate of the Tibet ***,achene formation and mucilage extrusion are poorly *** the present study,comprehensive analyses were performed on mucilage production during achene development and mucilage release from hydrated achene pericarp in ***,fertilization initiated the development of *** achenes,during which their color,size and texture were altered ***,using a metachromatic staining procedure,cytological events,the establishment of mucilage secretory cells in the inner epicarp layer were *** hydration of mature achenes led to the rapid bursting of mucilage secretory cells,which released a hydrophilic gel that surrounded the ***,enzymatic digestion indicated that major components of the mucilage were pectins;glucose(41.40%),rhamnose(26.58%),galactose(18.33%),trehalose(12.12%),and mannose(1.57%)were found to be the components of achene by using ion-exchange chromatography.

关键词： Mirabilis himalaica Achene mucilage formation mucilage extrusion Pectin Polysaccharide

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