More than fifty years LA Kupriyanov worked at the Botanical Institute. Komarov, for many years led her to set up the laboratory palynology. It is one of the first to realize the need to establish a reference collection of pollen and spores. The result of years of work led her team became widely known Palinoteka (store pollen samples) Botanical Institute, which to date includes 21 000 products of pollen and spores.
LA Kupriyanovaopublikovala more than 200 articles on plant systematics, history and structure of pollen floras. Her first works were dedicated to the taxonomic treatment of multiple births Leonorus plants, Linaria, Lotus, Panzeria etc. for the Flora of the USSR. Her first scientific article on the pollen of pink left in 1940. In 1948 she published an exhaustive study stostranichnoe "Pollen morphology and phylogeny of monocots", which is considered a major achievement in the study area. The topic of her dissertation she chose palynology Amenthaceae. She was one of the pioneers of the use of electron microscopy (both transmission and scanning) in a study of the structure of pollen Allium, Chloranthus, Cousinia, Liquidambar, Nelumbo and Nymphaea. LA Notofagovye Kupriyanov described as a separate family of flowering plants about fagales.
LA Kupriyanov has been an active participant in numerous international botanical and geological congresses. She was an expert vsemirnopriznannym Palynology: it invited to the editorial boards of several international publications, such as Pollen et Spores (France), Review of Palaeobotany & Palynology (the Netherlands) and the World Pollen and spores (Sweden).
LA Kupriyanov died January 13, 1987 from an attack of heart disease.
AA Grossgeim named in her honor one of the types of grasses (rye Kupriyanova) Secale kuprijanovii (S. kuprijanovii Grossh. & Nevski subsp. Transcaucasica Ivanov & GVYakovlev).