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Primary and secondary induction requirements for flowering in Alopecurus pratensis
Author(s) -
Heide Ola M.
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb02416.x
Subject(s) - photoperiodism , primordium , inflorescence , vernalization , biology , flower induction , botany , poa pratensis , horticulture , poaceae , biochemistry , gene
The critical temperature for primary induction of flowering in two Norwegian eco‐types of meadow foxtail ( Alopecurus pratensis L.) was about 21°C, with 6 weeks induction period. Inflorescence primordia were initiated with increasing effectiveness as the temperature was reduced below this level in both short days (SD) and long days (LD), although SD was the more effective photoperiod at all temperatures above 6°C. The degree of primary induction was closely negatively correlated with the length of basal leaves. Culm elongation and heading (secondary induction) were promoted by LD and high temperature and inhibited by the combination of SD and low temperature. The relationship between SD primary induction and vernalization is discussed in the light of these and other results.