ISSN:
1399-3054
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Biologie
Notizen:
Light effects on in vitro adventitious root formation in axillary shoots of a 95-year-old black cherry (Prunus serotina Ehrh.) were examined using microcuttings derived from cultured vegetative buds. Three studies were performed: 1) complete darkness and 4 levels of continuous white light irradiance were tested at 70, 278, 555 and 833 μmol m−2 s−1; 2) white, red, yellow and blue light were tested to assess the importance of spectral quality; and 3) the effect of blue light at intensities of 7,15, 22 and 30 μmol m−2 s−1 was also studied, Measurements included rooting percentage, total number of roots per shoot, and shoot and root dry weight. There was a strong negative effect of white light intensity upon root formation. Blue light between 15 and 22 μmol m−2: s−1 significantly retarded root formation and completely inhibited it at 36 μmol m−2 s−1. Shoots treated with yellow light exhibited the highest rooting percentage, mean number of roots per shoot, and root dry weight.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1399-3054.1990.tb00050.x
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