单词 | day-neutral |
释义 | > as lemmasday-neutral day-neutral adj. [after German tagneutral (1931 or earlier)] Botany (of a plant) having a flowering period that is unaffected by day-length, and hence typically having a long flowering or fruiting season.Cf. long-day adj. (b) at long adj.1 and n.1 Compounds 4a, short-day adj. at short adj., n., and adv. Compounds 6a. ΚΠ 1931 Gartenbauwissenschaft 4 482 The crossing of typical varieties of shortday lettuce (Winter and Forcing- and Spring lettuce) with day neutral [Ger. tagneutralen] lettuce or summerlettuce. 1937 Bot. Rev. 3 260 Those plants which flower readily under either a long or a short photoperiod and are designated as the indeterminate or day-neutral type, of course, have no critical photoperiod. 1986 J. A. Samson Trop. Fruits (ed. 2) ii. 13 It is customary to distinguish between short-day, long-day and day-neutral plants, according to their demands on the duration of the light period. However, most tropical fruit trees show only slight reactions, or none at all, to the photoperiod which is always between 11 and 13 hours in the tropics. 2012 Waterloo (Ont.) Region Rec. (Nexis) 6 June e3 There has been a learning curve among consumers when it comes to the day-neutral variety because most people are used to local strawberries coming on the market in June. < as lemmas |
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