Many endospermic seeds ( e . g . cereals and oil seeds ) are cultivated for their food reserves 许多有胚乳种子(如谷类和油料种子)是由于其营养物质而专门栽植的。
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In endospermic seeds the endosperm replaces the nucellus and is often a rich source of growth - regulating substances 在有胚乳种子中,胚乳取代珠心,成为生长调节物质(应为营养物质译者注)的丰富来源。