Материал из Антэкология /// Anthecology
(перенаправлено с «10.1007/BF00376912»)
Critical plant size for flowering in biennials with special reference to their distribution in a sand dune system
Oecologia, 1982. V. 55. No. 3. P. 281–284 (4).
Four biennial species (Oenothera erythrosepala, Dontostemon dentatus, Erigeron strigosus, and Erigeron sumatrensis) from the dune system at Azigaura, Japan, were sand-cultured in pots with different nutrient levels, and the critical plant size for the development of a flowering stalk was determined. The critical size decreased in the order O. erythrosepala>E. strigosus>D. dentatus=E. sumatrensis, and corresponded to the order of their distribution along the gradient of soil fertility in the dune system. This correspondence is discussed, and it is concluded that in a less fertile environment, biennials producing seeds after attaining a larger size have an advantage over those producing seeds earlier.