부산대학교 도서관

Potato (Solanum tuberosumL.) cvs. AC Brador and Shepody grownin vitroexhibit plantlets with a short, rosette-type growth habit, and restricts multi plication rates. In contrast, Russet Burbank develops into plantlets with adequate internode lengthin vitro.Cool-white fluorescent lamps provided irradiation for wooden boxes fitted with yellow plexiglass filters. The resultant irradiation lacked wavelengths from 380 to 525 nm. A box fitted with clear plexiglass was the control. Internode length of plantlets was ca.1.0 cm for all three cultivars when grown in boxes with yellow filters, and was 0.5 cm when clear filters were used. The number of nodes, haulm area, stem length, haulm fresh and dry weight of cvs. AC Brador and Shepody were significantly greater in boxes with yellow filters. Potato cvs. AC Belmont, Eramosa, Hunter, Huron, Mirton Pearl, Raritan and York all have a short growth habitin vitroand stem length was increased by the use of a yellow filter. The incidence of intumescences or oedemas on leaves of potato plantletsin vitrowas reduced from 60 to seven percent for AC Brador and from 70 to 10% for Shepody with the use of yellow filters. Blue-green light is therefore putatively involved in the occurrence of intumescences on potato tissuesin vitro.