MICROMORPHOLOGY AND ANATOMY OF THE FLOWER OF LEUCOJUM AESTIVUM L. (AMARYLLIDACEAE J. ST.-HIL.)

O. S. Fishchuk

Abstract


In the gynoecium of L. aestivum there are synascidiate, hemisynascidiate, symplicate, and asymplicate vertical zones. The longest zone is the fertile hemisynascidiate zone and the shortest is the synascidiate zone in the ovary. It was discovered that in L. aestivum the peduncle consists of 12 vascular bundles, which are reorganized into two circles of bundles, the outer with massive leading bundles, departing as dorsal bundles of perianth, traces of perianth tepals and septal bundles of carpels and inner circle of bundles over the nests are divided into three groups of ventral carpel bundles are lined up on four, which are located in the center of the ovary and providing nutrition to the ovules. Dorsal carpels bundles are double. Above the locule, ventral bundles of the carpel, as well as the double septal bundles, merge with the dorsal bundles and form a dorsal vein. The outer tepals of the simple perianth have nine vascular traces, and the inner tepals of the perianth have eight vascular traces. Traces of stamens are single-bundle, formed from traces of perianth tepals. The ovary has features of the early stages of fruit morphogenesis and adaptation to disclosure, such as differentiation of mesocarp and endocarp cells, double dorsal bundles of carpels. Structural flower features related to pollen proposal as reward pollinators. Since ovary is a structural basis of the fruit, histological ovary wall differentiation reflects the features of the subsequent morphogenesis of the fruit.

Keywords


Leucojum aestivum; flower morphology; vascular anatomy; gynoecium

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DOI: https://doi.org/10.25128/2078-2357.20.3-4.4

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