Factors determining the diurnal dynamics of blooming of chosen plant species

  • Denisow B
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The paper attempts to synthesize the determinants which may influence the diurnal rhythm of blooming. Additionally, I tried to explore and bring together topics that concern blooming and have always been considered separately because of their origin in different disciplines. The following species were included: <i>Hydrangea arborescens</i> L. subsp. <i>discolor</i> (Raf.), <i>H. paniculata</i> Sieb., <i>Viburnum opulus</i> L., <i>Chaenomeles japonica</i> Lindl., <i>Knautia arvensis</i> L., <i>Adonis vernalis</i> L., <i>Aster saggitifolius</i> Willd., <i>Taraxacum officinale</i> L. <i>Chelidonium majus</i> L. The taxons were observed in Lublin (51008' - 51018' N and 21027' - 21041' E) in the years 2001-2007. The blooming of species was determined at least for two vegetation seasons. During observations all flowers developed in one-hour intervals were counted. The diurnal dynamics of blooming differs among species and is modified by different endogenous and exogenous factors. The endogenous determinants of diurnal dynamics of blooming are morphological diversity of flowers (fertility or sterility) within species or heterostyly. The different pattern of blooming succour different mechanisms which prevent self-pollination (<i>Chaenomeles japonica</i> Lindl., <i>Knautia arvensis</i> L.). The abiotic factors, such as day length and temperature during the vegetation season, influence the change in the process of diurnal dynamics of blooming (e. g. <i>Taraxacum officinale</i>, <i>Chelidonium majus</i>).




Denisow, B. (2012). Factors determining the diurnal dynamics of blooming of chosen plant species. Acta Agrobotanica, 62(1), 83–89. https://doi.org/10.5586/aa.2009.010

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