7733448822

Материал из Антэкология /// Anthecology
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Dual Floral Induction Requirements in Phleum alpinum
Annals of Botany, . V. 66. No. 6. P. 687694 (8).
Flowering requirements of four Norwegian populations of Phleum alpinum were studied in controlled environments. A dual induction requirement was demonstrated in all populations. Inflorescence initiation had an obligatory requirement for short days (SD) and/or low temperature, while culm elongation and heading were enhanced by long days (LD) and higher temperatures. At 3 and 6 °C primary induction was almost independent of photoperiod, whereas SD was more effective than LD at higher temperatures. The critical temperature for primary induction was about 15 °C in SD and 12 °C in LD. Saturation of induction required 12 weeks of exposure to inductive conditions, although some heading and flowering took place with 6 weeks exposure to optimal conditions (9 °C/SD). Inflorescence development also took place in 8 h SD although it was delayed and culm elongation was strongly inhibited compared with LD conditions. Only small differences in flowering response were found between the populations.
Dual Floral Induction Requirements in Phleum alpinum
Heide O.M.
Annals of Botany, 1990. V. 66. No. 6. P. 687–694 (8).
Flowering requirements of four Norwegian populations of Phleum alpinum were studied in controlled environments. A dual induction requirement was demonstrated in all populations. Inflorescence initiation had an obligatory requirement for short days (SD) and/or low temperature, while culm elongation and heading were enhanced by long days (LD) and higher temperatures. At 3 and 6 °C primary induction was almost independent of photoperiod, whereas SD was more effective than LD at higher temperatures. The critical temperature for primary induction was about 15 °C in SD and 12 °C in LD. Saturation of induction required 12 weeks of exposure to inductive conditions, although some heading and flowering took place with 6 weeks exposure to optimal conditions (9 °C/SD). Inflorescence development also took place in 8 h SD although it was delayed and culm elongation was strongly inhibited compared with LD conditions. Only small differences in flowering response were found between the populations.
AID: 7733448822
DOI: 10.1093/oxfordjournals.aob.a088083