Effect of Chemicals and Photoperiod on the Growth and Flowering of Thanksgiving Cactus

Abstract

Schlumbergera truncata (Haw.) Moran ‘Christmas Charm’, ‘Lavender Doll’, and ‘White Christmas’ were grown under an 8 hr natural photoperiod or an 8 hr natural photoperiod plus 4 hr of incandescent light from 10:00 pm to 2:00 am and treated with single sprays of BA at 100 and 200 ppm, GA at 25, 50, and 100 ppm, BA at 100 and 200 ppm plus GA at 25 or 100 ppm, calcium carbide at 2910 ppm, ethephon at 100 and 1000 ppm, daminozide at 5000 ppm, ancymidol at 132 ppm, and chlormequat at 1000 ppm in 2 experiments. No flower buds were initiated from any plants grown under the 8 + 4 hr photoperiod. BA applied at 100 and 200 ppm increased the number of phylloclades on ‘Christmas Charm’ plants grown under the 8 + 4 hr. BA at 200 ppm applied to plants grown under the 8 hr photoperiod caused an increase in flower bud number and earlier flowering in all cultivars tested. BA + 100 or 200 ppm 100 ppm GA applied to plants grown under the 8 hr + 4 hr photoperiod stimulated the growth and elongation of phylloclades. Applied to plants grown under the 8 hr photoperiod, BA plus GA caused the growth and elongation of phylloclades, initiation of lower buds, and induced the development of lateral phylloclades and flower buds. Ancymidol at 132 ppm and 1000 ppm chlormequat sprays produced earlier flower bud initiation and increased flower number to flower bud ratios on ‘Christmas Charm’ plants. Chemical names used: N-(phenylmethyl)-H-purin-6-amine (BA); gibberellic acid (GA); (2-chloroethyl)phosphonic acid (ethephon); butanedioic acid mono(2,2-dimethylhydrazide) (daminozide); α-cycloproply-α-4-methoxyphenyl)-5-pyrimidinemethanol) (ancymidol).

Effect of Photoperiod and Growth Regulators on Growth of Three Cactaceae

“…There were no photoperiod x growth regulator in teractions influencing the growth of the cac tus species tested. A photoperiod-B A interaction has been reported on Schlumbergera by other workers (3,4,8).…”

“…Halvey and Rudich (2) found that GA delayed flow ering in Schlumbergera. Other workers (3,4,8) have reported that BA sprays applied to Schlumbergera increased the number of phylloclades of plants grown on long pho toperiods and increased the number of flower buds on plants grown on short photoperiods. A combination spray of BA -1-GA has been shown to stimulate growth and elongation of Schlumbergera phylloclades of plants grown on a long photoperiod, whereas under a short photoperiod application of BA + GA elon gated phylloclades and induced both lateral phylloclade development and flower buds (4).…”

“…Ethephon, a growth regulator reported to induce branch ing in other floricultural crops (6), might be useful to induce cacti branching. Ho et al (4) found that ethephon a) did not increase phylloclade number, b) reduced flower bud num ber, c) and delay ed flo w erin g in Schlumbergera.…”

Biomass accumulation in an ornamental Cactaceae (Mammillaria elongata subsp. echinaria) in response to a single 6-benzylaminopurine (BAP) spray

“…In this sense, it has been claimed that the close coordination between the root and shoot growth is controlled by a signaling pathway which is largely hormonal (Bartoli et al, 2013). In this regard, several studies have found an increase in the number of vegetative stems and reproductive buds in cactus plants sprayed with benzyl aminopurine (BAP) (Ho et al, 1985;Boyle, 1992;Harkess and Lyons, 1994;Boyle and Marcotrigiano, 1997;Arrellano-Perusquía et al, 2013). The effect of BAP on biomass accumulation has been related to a change in photo-assimilate partitioning in favor of shoots (Boyle, 1995).…”

Effect of Benzylamino Purine (BA) and Gibberellic Acid (GA3) on Growth and Flowering in Schlumbergera truncata

“…생장조절제는 작물에 따라 단용 또는 혼용 효과가 다르게 나타나기도 하는데, 라넌큘러스의 경우 BA와 GA 3 의 혼용처리 시 줄기와 꽃의 크기가 커졌지만 철쭉은 BA 단용처리와 GA 3 와의 혼용처리 간에 신초 증가 효과는 차이가 없었다 (Bell et al, 1997;. ' (Ho et al, 1985;Park et al, 2001;Choi et al, 2003;Kim et al, 2015). 반면 Bell et al(1997) 2).…”