EFFECTS OF GA3, BA AND NAA ON DRY MATTER PARTITIONING AND RHIZOME DEVELOPMENT IN TWO CULTIVARS OF ACHIMENES LONGIFLORA DC, UNDER THREE LEVELS OF IRRADIANCE.
Increasing irradiance levels increased dry weight of aerial parts and number and dry weight of rhizomes. GA3 increased plant height; the elongation effect was more prominent at lower irradiances. The combination of GA3 with BA or/and NAA increased weight of aerial parts and lowered the percentage of dry matter incorporated in the rhizomes (RWR). BA combined with NAA increased dry weight and number of rhizomes; however responses to growth regulator treatments depended on the cultivar; 'Flamenco' was more responsive than 'Hilda'.