Abstract
In a pot experiment, an early-flowering Narcissus pseudonarcissus cv. ‘Dutch Master’ (DM) and late-flowering N. poeticus cultural form (PO) were examined. The photosynthetic rate (A), transpiration rate (E), stomatal conductance (gs), photosynthetic water use efficiency (WUE), relative chlorophyll content (CCI) and chlorophyll fluorescence (F) were measured regularly. Leaf length, scape length and weight of the plant organs were also measured. The DM cultivar had higher gs and lower E values than the PO on most measuring dates (season average: gs: DM: 165.34, PO: 123.63; E: DM: 1.39, PO: 1.78 mmol H2O m−2s−1). The A curve was similar for the two taxa, except for the first measuring dates. The basic F values (F0, Fm, Fv) for DM were lower and CCI values were higher than for PO (season average of CCI: DM: 94.82, PO: 60.34). The Fm/F0, Fv/F0 and CCI curves were well described by a second order equation. The seasonal change of F and CCI values was the greatest for both taxa near the leaf tip. Bulb growth occurred in the two taxa in approximately the same calendar period, regardless of flowering time. A significant part of the leaf growth in DM occurred after flowering, while the leaves of PO reached their mature size by flowering.
Highlights
IntroductionNarcissus species are among the most important ornamental bulbous plants
Narcissus species are among the most important ornamental bulbous plants. It is widely used as an outdoor perennial, for cut flower production in open fields, and as a cut or pot flower in greenhouse production [1]
N. poeticus belongs to a separate division (Div. 9)
Summary
Narcissus species are among the most important ornamental bulbous plants It is widely used as an outdoor perennial, for cut flower production in open fields, and as a cut or pot flower in greenhouse production [1]. Its main characteristics are: pure white perianth segments, a short or disc-shaped corona, usually with a green and/or yellow center and red rim, sometimes of a single color [4]. Nowadays, this Narcissus species is not used very much, mainly because of the latest spring flowering species from the genus Narcissus [6]. The snow-white petals and the elegant appearance of the flowers, as well as the intense fragrance, make it interesting to develop a growing technology and extend the picking period as a cut flower
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
