首页|The cellular and molecular basis of the spur development in Impatiens uliginosa
The cellular and molecular basis of the spur development in Impatiens uliginosa
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The nectar spur is an important feature of pollination and ecological adaptation in flowering plants,and it is a key innovation to promote species diversity in certain plant lineages.The development mechanism of spurs varies among different plant taxa.As one of the largest angiosperm genera,we have little understanding of the mechanism of spur development in Impatiens.Here,we investigated the initiation and growth process of spurs of Impatiens uliginosa based on histology and hormone levels,and the roles of AUXIN BINDING PROTEIN(ABP)and extensin(EXT)in spur development were explored.Our results indicate that the spur development of I.uliginosa is composed of cell division and anisotropic cell elongation.Imbalances in spur proximal-distal cell division lead to the formation of curved structures.Endogenous hormones,such as auxin and cytokinins,were enriched at different developmental stages of spurs.IuABP knockdown led to an increase in spur curves and distortion of morphology.IuEXT knockdown resulted in reduced spur length and loss of curve and inner epidermal papillae structures.This study provides new insights into the mechanism of spur development in core eudicots.
Yang Li、Wu-lue Huang、Xin-yi Li、Ying-duo Zhang、Dan-chen Meng、Chun-mei Wei、Mei-juan Huang、Hai-quan Huang
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College of Landscape Architecture and Horticulture Sciences,Southwest Research Center for Engineering Technology of Landscape Architecture(State Forestry and Grassland Administration),Yunnan Engineering Research Center for Functional Flower Resources and Industrialization,Research and Development Center of Landscape Plants and Horticulture Flowers,Southwest Forestry University,Kunming,Yunnan,650224,China
School of Art and Design,Lanzhou Jiaotong University,Lanzhou 730070,China
Department of Biodiversity Conservation,Department of Life Science,Southwest Forestry University,Kunming 650224,China
国家自然科学基金国家自然科学基金Major Science and Technology Projects in Yunnan ProvinceDoctoral Tutor Team for Genetic Improvement and Highefficient Propagation of Landscape Plants in Yunnan Province
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