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Prelimiary studies on tissue structure and developmental anatomy of apricot during fruit growth and development

WANG Rong hua,LI Jia rui,CHEN Li lun (Department of Horticulture,Northwest Science and Technology University of Agriculture and Forestry,Yangling,Shaanxi 712100,China)  
There are two hemianatropous ovules in the ovary of apricot tree.The structure of pericarp is composed of exocarp,mesocarp and endcarp.The exocarp is a composite structure,composed of epidermal cell,stomatal apparatus and hairs.The mesocarp is largly of parenchymatous tissue and vascular bundle.The endcarp comprises three distinct tissue areas,the inner area vertical elongated cells and the middle area tangential elongated cells and the outer equal diameter cells.The division of zygote passes globular embryo and cotyledon embryo.The differentiation of embryo root usually precedes gemmule.
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