Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(2), 251-254 | DOI: 10.11118/actaun200856020251

Vliv ošetření chlormequatem a paclobutrazolem na růst a kvetení světlice barvířské (Carthamus tinctorius L.)

Jiří Uher
Ústav zelinářství a květinářství, Mendelova zemědělská a lesnická univerzita v Brně, Valtická 337, 691 44 Lednice, Česká republika

Reakce na ošetření chlormequatem a paclobutrazolem byly sledovány na šesti odrůdách světlice barvířské (Carthamus tinctorius L.). Ošetření chlormequatem nepřineslo průkazné změny v termínech kvetení ani v morfologických znacích. Rostliny ošetřené pac-lobutrazolem zůstávaly nižší a vyvíjely více úborů. V protikladu k předpokladům však ošetření paclobutrazolem vedlo k ranějšímu nakvétání. Takové výsledky nenasvědčují hypotézám vydávajícím světlici za typickou dlouhodenní rostlinu, přecházející v květní indukci ve spojení s prodlužováním stonku po vernalizaci ve stadiu listové růžice.

světlice, Carthamus, chlormequat, paclobutrazol, růstové retardanty, kvetení

The effect of chlormequat and paclobutrazol treatment on safflower (Carthamus tinctorius L.) growth and flowering

The responses of six safflower varieties (Carthamus tinctorius L.) to chlormequat and paclobutrazol treatments were monitored. Although a chlormequat application did not bring about any significant differences in flowering or morphological traits, plants treated with paclobutrazol were shorter and had a higher number of flower heads. However, contrary to expectations, treatment by paclobutrazol also made flowering earlier. This does not appear to support the idea that safflower is a typical long-day plant, progressing to floral induction and stem elongation after vernalization in the winter at the leaf-rosette stage).

Keywords: safflower, Carthamus, chlormequat, paclobutrazol, growth retardants, days to flowering
Grants and funding:

This work was supported by E-97/01-3160-0200 MZe ČR project, and MSM 435100002 MŠMT ČR research program.

Received: October 19, 2007; Published: November 14, 2014  Show citation

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Uher, J. (2008). The effect of chlormequat and paclobutrazol treatment on safflower (Carthamus tinctorius L.) growth and flowering. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 56(2), 251-254. doi: 10.11118/actaun200856020251
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