[Spruce biology]

bark bois botanica botanique botany bourgeon buds cariotipos caryotype corteza cultivation cultivo desarrollo embrionario embryonic development fertilisation fertilizer application feuille fisiologia vegetal floraison flowering forest ecology forest nurseries gas exchange genetic inheritance genetic resources geographical distribution hojas intercambio de gases karyotypes leaves madera mineral nutrients mycorrhizae nutrientes minerales pepiniere forestiere picea plant anatomy plant growth substances plant habit plant physiology plant reproductive organs port de la plante pratique culturale production de semences racine roots seed production stems sustancias de crecimiento vegetal tallo taxonomia taxonomie taxonomy tige vegetative propagation viveros forestales wood yema (planta)