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THE INDUCTIVE REQUIREMENTS FOR FLOWERING OF SOME TEMPERATE GRASSES
Author(s) -
Cooper J. P.,
Calder D. M.
Publication year - 1964
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1964.tb01133.x
Subject(s) - poa pratensis , lolium perenne , perennial plant , dactylis glomerata , biology , agrostis stolonifera , phleum , poa annua , elymus , seedling , agronomy , temperate climate , festuca pratensis , botany , poaceae
A survey was made of the flowering responses of 47 annual, biennial and perennial grasses, to measure the extent of any winter requirement for floral induction, and to see how far this could be provided by controlled cold or short‐day treatment. The annual species showed little or no inductive requirement, nor did the perennials Arrheuatherum elatius, Ceratochloa unioloides, Phleum pratense and Poa nemoralis . Most perennials possessed a definite inductive requircinent. A few species, such as Lolium perenne , responded to both cold and short‐day given to the young seedling, while others, such as Phleum nodosum, Agrostis alba, A. canina, A. stolonifera and A. tenuis , responded to short‐day induction but not to cold. Many temperate perennials, however, including Cynosurus cn'status, Dactylis glomerata, Festuca pratensis, F. rubra, Poa pratensis and P. trivialis did not respond to seedling induction and possibly have a juvenile stage before they are able to respond to inductive conditions. The sequence of flowering responses in the temperate perennial grasses is evidently more complex than was previously thought, and the perennial habit can be achieved by many different developmental pathways.