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DEVELOPMENT OF OVULE AND SEED‐COAT OF ERYTHROXYLUM COCA LAMK.
Author(s) -
Boesewinkel F. D.,
Geenen J.
Publication year - 1980
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1980.tb01200.x
Subject(s) - ovule , coat , coca , biology , botany , traditional medicine , horticulture , medicine , pollen , paleontology , psychiatry
SUMMARY The inner and outer integuments of Erythroxylum coca are both of dermal derivation. The outer integument is initially 3 cells and later 3–5 cells thick. The inner integument is at first 3 cells thick to become multiplicative and ultimately about 20 cells thick and thus forming the greater part of the mass of the seed. The inner layer is developed as an endothelium. The nucellus is oblong by mitotic activity in the part beneath the embryo sac. The testa and tegmen are crushed with the exception of the fibrous exotegmen. The flattened cells of the inner layer contain tannin. The relationship between Erythroxylaceae and Linaceae is discussed.