Flowering phenology and pollen production of three early spring Pulsatilla species

• Autorzy: Strzalkowska-Abramek M. , Jachula J. , Dmitruk M. , Pogroszewska E.

Warianty tytułu

PL

Fenologia kwitnienia i produkcja pyłku trzech wczesnowiosennych gatunków z rodzaju Pulsatilla

• Języki publikacji: EN

Abstrakty

EN

Blooming biology and pollen production of the following species: Pulsatilla zimmermannii Soó, P. halleri (All.) Willd., and P. vulgaris Mill. grown in UMCS Botanical Garden in Lublin, Poland (51°16'N, 22°30'E) was studied. The species attract insect visitors with large (size 6–8 cm in diameter), colourful, campanulate, actinomorphic flowers. The androecium is multistaminate (min–max: 142–282 anthers per flower), spirally arranged. Minute droplets of nectar were noted at the base of androecium and on staminodes. The anthers dehisced subsequently and pollen of a single flower was available to insects for 5–11 (7) days. On average, P. zimmermannii was found to produce the highest amount of pollen (9.16 g per 1 m2 ), which was 2 times more pollen than P. vulgaris (4.22 g per 1 m2 ), while P. halleri produced 7.63 g per 1 m2 . Pollen grains of the Pulsatilla species are medium in size (P axis ranged 29.8–38.4 μm, and E axis ranged 32.3–39.6 μm) and are oblate-spheroid in shape (P/E index ranged between 0.90 and 0.95). If planted together, the species will provide pollen from first days of April until end of the month, i.e. during the period when seasonal activity of Apoidea insects begins. Pulsatilla species might contribute to lists of garden plants that attract insect visitors with abundant pollen reward and minute nectar.

PL

Przeprowadzone badania dotyczyły biologii kwitnienia i produkcji pyłku trzech gatunków sasanki: Pulsatilla zimmermannii Soó, P. halleri (All.) Willd. oraz P. vulgaris Mill., uprawianych w Ogrodzie Botanicznym UMCS w Lublinie. Rośliny te wytwarzają duże (średnica kwiatu 6–8 cm), dzwonkowate kwiaty o symetrii promienistej. Pręcikowie składa się z licznych pręcików (142–282 pręcików/kwiat) ułożonych spiralnie. U podstawy pręcikowia oraz na prątniczkach zauważalne były drobne krople nektaru. Pożytek pyłkowy z pojedynczego kwiatu był dostępny dla owadów przez 5–11 (7) dni. Największą wydajność pyłkową obliczono dla P. zimmermannii (średnio 9,16 g/m2 ). Średnie masy pyłku produkowanego przez kwiaty P. halleri i P. vulgaris wynosiły odpowiednio 7,63 g/m2 i 4,22 g/m2 . Ziarna pyłku Pulsatilla spp. są średniej wielkości: długość osi biegunowej (P) zawarta była w przedziale 29,8–38,4 μm, a równikowej (E) – w granicach od 32,3 μm do 39,6 μm. Stosunek P/E wynosił od 0,90 do 0,95, co wskazuje, że ziarna są kształtu płasko-kulistego. Badane gatunki sasanki mogą uzupełniać zasoby pokarmowe owadów zapylających wczesną wiosną.

• Wydawca: -
• Czasopismo: Acta Scientiarum Polonorum. Hortorum Cultus
• Rocznik: 2016
• Tom: 15
• Numer: 6
• Opis fizyczny: p.333-346,fig.,ref.

Twórcy

autor

Strzalkowska-Abramek M.

• Department of Botany, University of Life Sciences, 15 Akademicka, 20-950 Lublin, Poland

autor

Jachula J.

• University of Life Sciences, Lublin, Poland

autor

Dmitruk M.

• University of Life Sciences, Lublin, Poland

autor

Pogroszewska E.

• University of Life Sciences, Lublin, Poland

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