Sternbergia lutea (L.) Ker-Gawl. ex Sprengel and Narcissus tazetta L. subsp. tazetta are two autumnal geophytes belonging to Amaryllidaceae. N. tazetta subsp. tazetta consist of some vomitory alkaloids. S. lutea has also important alkaloids too. In this study nitrogen (N), phosphorus (P) and potassium (K) analysis were carried out in two taxa during vegetative and generative growth phases and the results belonging to vegetative and generative growth phases were compared with each other. As a result of these analysis macroelement concentrations are higher during generative growth phase in under ground parts due to "top senescence".
KUTBAY, HAMDİ GÜRAY (1999) "Top Senescence in Sternbergia lutea(L.) Ker-Gawl. ex Sprengel and Narcissus tazettaL. subsp. tazetta," Turkish Journal of Botany: Vol. 23: No. 2, Article 7. Available at: https://journals.tubitak.gov.tr/botany/vol23/iss2/7