Cyclamen Persicum Research Articles

The use of green waste compost in peat-based potting mixtures: Fertilization and suppressiveness against soilborne diseases

Twelve commercially produced Dutch green waste composts were evaluated for their suitability to replace 20% (v/v) peat substrate in the cultivation of ornamentals. Salt concentrations were determined in water extracts of the composts and disease suppressive effects were assessed against various soilborne diseases. The Cl-concentration of the compost extract appeared to be the limiting factor for use of the composts in potting mixtures. The Cl-concentrations in 7 and 1 composts, respectively, were too high to replace 20% of peat for growing salt sensitive and moderately salt sensitive plants, according to guidelines set for these groups of plants. The suppressive effects of the composts were tested in peat-based potting mixtures using three bioassays: Phytophthora cinnamomi—lupin, Cylindrocladium spathiphylli— Spathiphyllum and Rhizoctonia solani AG2-1—cauliflower. Disease levels in compost-amended mixtures were compared with the non-amended controls. None of the composts induced suppressiveness against P. cinnamomi; 3 and 9 composts significantly induced suppressiveness against C. spathiphylli and R. solani, respectively. No significant disease enhancement was observed in any of the bioassays. The pH of the potting mixture showed a negative correlation with suppression of the Rhizoctonia disease ( R 2 = 0.56). The effect of pH (pH 4–6) on suppression of R. solani and P. cinnamomi was further studied in non-amended peat. Disease suppression of R. solani in cauliflower decreased with increasing pH in two different kinds of peat, while there was no effect on P. cinnamomi. The suppressive effect of 3 composts was assessed in two experiments against Fusarium wilt in Cyclamen persicum (caused by F. oxysporum f. sp. cyclamini) and Begonia eliator (caused by F. foetens) under near-commercial conditions. None of the composts had a significant effect on Fusarium wilt in Cyclamen. Two and 3 composts significantly induced suppressiveness against Fusarium wilt in Begonia in the first and second experiments, respectively. No significant differences were observed in growth characteristics between Begonia plants grown in compost-amended and non-amended potting mixture in both experiments. In the second experiment, Cyclamen plants grown in compost-amended potting mixture had significant lower number of flowers than plants grown in non-amended potting mixture, which may have been due to lower concentrations of N in the compost-amended potting mixtures. In conclusion, most composts of the origin and composition tested can replace 20% peat in potting mixtures for moderately salt sensitive and salt tolerant plants. Amendment of these composts can contribute to control of Fusarium wilt in Begonia plants.

Variable DNA content of Cyclamen persicum regenerated via somatic embryogenesis: rethinking the concept of long-term callus and suspension cultures

By flow cytometric experiments in Cyclamen persicum both with propidium iodide (PI) and DAPI (4′,6-Diamidino-2-phenylindol)-staining we were able to present (1) a new estimation for the absolute DNA content in the range of 3.17 pg DNA/2C and (2) ploidy abnormalities which were detected in the pathway of somatic embryogenesis. These aberrations might have arisen from ploidy mutations or abnormal polyploidization processes. Morphologically normal somatic embryos contained the smallest proportion of individuals with ploidy abnormalities, but also a regenerated plant in the green house displayed a significantly elevated DNA content. The results are discussed in the framework of future application of in vitro propagation techniques based on regeneration from fastly growing undifferentiated cells like long-term callus and suspension cultures.

First Report of Impatiens necrotic spot virus in Ornamental Plants in Hungary

Economically important viruses such as Tomato spotted wilt virus, genus Tospovirus, are transmissible mechanically and mainly by two thrips species (Thrips tabaci and Frankliniella occidentalis) in Hungary (1). Samples (31) of eight ornamental plant species (Catharanthus roseus, Cyclamen persicum, Dendranthema × grandiflorum, Eustoma grandiflorum, Gerbera sp., Impatiens walleriana, Ocimum basilicum, and Verbena hybrida) were studied. Symptoms including color breaking on flowers and necrotic symptoms on leaves were observed on four samples (C. persicum, I. walleriana, O. basilicum, and E. grandiflorum). Infection by Impatiens necrotic spot virus (INSV) was determined by double-antibody sandwich-ELISA and triple-antibody sandwich-ELISA using antisera obtained from Loewe (Sauerlach, Germany) and the DSMZ. Back inoculation with the F. occidentalis vector was also carried out to Lycopersicon esculentum as indicator plants. Back inoculation was also positive for INSV by symptoms and ELISA. The high amount of ornamental plant production together with the use of virus-infected propagation material and the increasing thrips vector populations may result in significantly increased establishment and distribution of INSV in Hungary.

The Anatomy of the Stigma and Style from Cyclamen persicum (Mill.) cv. “Pure White” and its Relation to Pollination Success

Old flowers of Cyclamen generate few or no seeds. To understand the pollination problems of Cyclamen we investigate the general anatomy of the stigma and the style of Cyclamen persicum by scanning electron microscopy at different stages of floral maturity. Our investigations confirm that there is a hollow style. Against data commonly found in the literature, we present evidence of pollen germination and tube growth that show the stigma is not outside the style but inside it. Furthermore the maturation process of the style during the flowering time indicates a mechanism by which the stigma becomes shut off through closure at the terminal aperture of the style. At 3 to 5 days after anthesis there was the beginning closure of the style which was nearly completed at 21 days. The substance which leads to the closure is still unknown. The closure of the hollow style is a probable cause for failure of seed set in flowers not pollinated early in anthesis.

CRYOPRESERVATION OF EMBRYOGENIC SUSPENSION CULTURES OF CYCLAMEN PERSICUM MILL.

We have developed a protocol for the cryopreservation of embryogenic suspension cultures of Cyclamen persicum, which does not involve the need of sophisticated equipment. With the aim of achieving this simple protocol for cryopreservation, different cryoprotectants in the pre-culture and pre-treatment periods on cell growth and re-growth after cryopreservation were tested. For cryopreservation experiments embryogenic suspension cultures in the linear growth phase 7-10 days after subculture were used. Of the different cryoprotectants tested during a 2-day pre-culture, 0.6 M sucrose resulted in the highest re-growth rate of 75% based on the number of Petri dishes plated after thawing. Additionally, a pre-treatment with 0.6 M sucrose and 10% DMSO (dimethylsulfoxide) for 1 h immediately prior to freezing, also positively affected re-growth. Experiments in which the optimal pre-culture duration was varied showed that 2-4 days was the best exposure time to 0.6 M sucrose. Callus re-grown after cryopreservation showed growth rates similar to that of unfrozen callus and regenerated even higher numbers of somatic embryos than unfrozen control callus. Microscopic studies on viability using FDA (fluorescein diacetate) staining revealed that only few small embryogenic cells survived cryopreservation, while vacuolated single cells died.

Efficient plant regeneration from protoplasts isolated from embryogenic suspension cultures of Cyclamen persicum Mill.

A protocol for plant regeneration from protoplasts has been developed, and then successfully applied to different genotypes of Cyclamen persicum Mill. Protoplasts were isolated from embryogenic suspension cultures by enzymatic digestion in 2% cellulase R10 and 0.5% macerozyme R10. Yields obtained varied between 1 and 5 × 105 protoplasts per gram fresh mass depending on the genotype. Protoplasts were immobilized in alginate films, which promoted proper cell wall regeneration. The highest cell division frequencies were found in modified Kao and Michayluk (1975, Planta 126:105–110) medium containing the same types and concentrations of plant growth regulators that were applied for suspension culture (2.0 mg l−1 2,4-dichlorophenoxyacetic acid and 0.8 mg l−1 6-(γ,γ-dimethylallylamino)purine). Cell division was recorded for all 11 tested genotypes in frequencies of up to 12% and 18% after 7 and 14 days, respectively. However, cell division frequency varied strongly between different genotypes. After 4–6 weeks calluses were released from the alginate films and further cultured on hormone-containing medium for continued growth or transferred to hormone-free medium for regeneration of somatic embryos. Plant regeneration via somatic embryogenesis succeeded in 9 out of the 11 genotypes under investigation. Up to now protoplast-derived plants from four genotypes have been successfully transferred to soil.

Wilt and Collapse of Cuphea ignea Caused by Phytophthora tropicalis in Italy.

The genus Cuphea (Lythraceae) includes approximately 250 species of annual, evergreen perennials and short shrubs native to Central and South America. During the springs of 2003 and 2004, 10% of the nursery stock of approximately 12,000 potted cigar-flowers (C. ignea A. DC) grown in a screenhouse at a commercial ornamental nursery near Piedimonte Etneo, Sicily, had symptoms of wilt, defoliation, and rapid collapse of the entire plant. These foliar symptoms were associated with a reduced root system, browning of the collar, and dark brown discolored roots. A Phytophthora species was consistently recovered by plating small pieces of rotted roots of symptomatic plants onto selective medium (3); pure cultures were obtained by single-hypha transfers. On potato dextrose-agar (PDA), cardinal temperatures for growth were 10 to 35°C and the optimum was 28 to 30°C. Sporangiophores were umbellate or in a close monoclasial sympodium and mean dimensions of sporangia were 52 × 26 mm, with a mean length/width ratio of 2:1. Sporangia produced on V8 juice agar (VJA) were ellipsoid, fusiform, or limoniform with a tapered base. They were papillate, occasionally bipapillate, caducous, with a long pedicel (as much as 150 μm). All isolates were mating type A1 determined by pairing with A2 reference isolates of P. palmivora (Butl.) Butl. and P. nicotianae Breda de Haan. Oogonia with amphigynous antheridia were formed on VJA after 10 to 15 days at 24°C in the dark. Occasionally, 10 of 15 isolates formed small chlamydospores on VJA. Electrophoretic patterns of total mycelial proteins and four isozymes (acid and alkaline phosphatase, esterase, and malate dehydrogenase) on polyacrylamide slab gels (3) of all Cuphea isolates were very similar to those of reference isolates of P. tropicalis M. Aragaki & J. Y. Uchida from Convolvulus cneorum L. (IMI 391714) and Rhamnus alaternus L., respectively. In addition, the Cuphea isolates were clearly distinct from reference isolates of other species including P. capsici Leon., P. citricola Sawada, P. citrophthora (R. E. Smith & E. H. Smith) Leon., P. nicotianae, and P. palmivora. On the basis of morphological cultural characters and the electrophoretic phenotype, the isolates were identified as P. tropicalis. Internal transcribed spacer (ITS) regions of rDNA sequences (2) confirmed the identification. Koch's postulates were fulfilled by testing three cigar-flower isolates, including isolate IMI 391709, on 10 6-month-old potted cuttings of Cuphea inoculated by applying a 10-ml zoospore suspension (2 × 104 zoospores/ml) to the crowns, incubated for 24 h at 100% relative humidity, and maintained in the greenhouse at 20 to 24°C. After 10 days, crowns and stems were brown and all plants wilted within 20 days. Ten control plants treated with water remained healthy. P. tropicalis was reisolated from infected tissues. The test was repeated with similar results. In Europe, P. tropicalis has been reported on Cyclamen persicum Mill. in Germany (4) and C. cneorum and R. alaternus in Italy (1), indicating a broad host range and spreading in ornamental nurseries.

An ancient pollinator of a contemporary plant ( Cyclamen persicum): When pollination syndromes break down

Pollination of Cyclamen persicum (Primulaceae) was studied in two wild populations in Israel. Buzz-pollination proved to be extremely rare, and performed by a large Anthophora bee only. The most frequent pollinators were various unspecialized species of thrips (Thysanoptera) and hoverflies (Syrphidae). In the Winter-flowering populations the commonest visitor was a small primitive moth, Micropteris elegans (Micropterigidae, Lepidoptera). These moths feed on pollen, copulate and oviposit within the flowers. From the rarity of buzz-pollination it is concluded that the genus Cyclamen co-evolved with large bees capable of buzz-pollination, but lost its original pollinators for unknown historical reasons. The vacant niche was then open to various unspecialized pollen consumers such as thrips, hoverflies and small solitary bees. While these insects are not specific to C. persicum and seem to play a minor role only, the moth strictly relies upon Cyclamen and seems to be the most efficient pollinator.

Proteomic analyses of somatic and zygotic embryos of Cyclamen persicum Mill. reveal new insights into seed and germination physiology

In the horticulturally important ornamental species Cyclamen persicum Mill., somatic embryogenesis is an efficient vegetative propagation method and the development of artificial seeds is an ultimate aim. This study aims at a systematic comparison of the proteomes of zygotic embryos, somatic embryos grown in liquid medium containing 30 or 60 g l(-1) sucrose, germinating embryos of both types and endosperm in order to obtain novel insights into seed and germination physiology. Using high resolution two-dimensional isoelectric focussing/sodium dodecylsulfate polyacrylamide gel electrophoresis (2D IEF/SDS PAGE), 74% of the proteins expressed in zygotic embryos were found in similar abundance in somatic embryos grown in 60 g l(-1) sucrose. Somatic embryos grown in 30 g l(-1) sucrose accumulated fewer protein species than those grown in 60 g l(-1). Selected proteins were identified following mass spectrometry (nano-LC-MS/MS). Four enzymes involved in glycolysis (UDP-glucose pyrophosphorylase, fructose bisphosphate aldolase, triosephosphate isomerase and glyceraldehyde-3-phosphate dehydrogenase GAPDH) were specifically induced in somatic embryos. 11S globulin proteins identified by MS were present in high levels in somatic embryos, zygotic embryos and endosperm, whereas 7S globulins were detected mainly in endosperm and zygotic embryos. These are the first storage proteins identified in C. persicum. Xyloglucans are known to be another group of seed storage compounds in C. persicum. Interestingly, xyloglucan endotransglycosylases were found to be highly expressed in endosperm tissue. We discuss the physiological implications of these observations.

Comparative analysis of cell cycle events in zygotic and somatic embryos of Cyclamen persicum indicates strong resemblance of somatic embryos to recalcitrant seeds

Embryo development and germination of Cyclamen persicum have been comparatively characterized for zygotic and somatic embryos with regard to mitotic activity and morphology in order to identify developmental abnormalities in somatic embryogenesis. Zygotic embryo development proved to be highly synchronous with distinct periods of cell division, cell elongation and embryo maturation within a total period of 17 weeks of seed development. Somatic embryo development was accomplished within only 3 weeks, resulting in a mixture of morphologically highly variable embryos. No distinct developmental periods could be identified and no reduction of the mitotic activity was discovered for non-desiccated somatic embryos. Controlled desiccation of somatic embryos severely reduced their germination rate, demonstrating resemblance of somatic embryos to recalcitrant seeds, whereas zygotic Cyclamen seeds could be characterized as typically orthodox.

Effects of Nitrogen Source and Gellan-gum Concentration in Medium on Plant Regeneration from Somatic Embryos in Cyclamen (Cyclamen persicum Mill.).

シクラメン体細胞胚からの植物体再生に及ぼす培地中の窒素形態の影響を調査した結果，微量のビタミン類以外に硝酸態窒素を含まない培地では体細胞胚が発芽せず，体細胞胚の発芽には硝酸態窒素が必須であると考えられた．体細胞胚の発芽は，1/2MS培地の窒素源を20 mM 硝酸カリウム，または2 mM塩化アンモニウムと18 mM 硝酸カリウムに置き換えた修正1/2MS培地で最も促進された．また，体細胞胚からの植物体再生に及ぼす培地中のジェランガム濃度の影響を調査した結果，根および葉を有する個体数は1.0% ジェランガム添加培地で最も大きな値を示した．1.0および2.0%ジェランガム添加培地ではハイパーハイドリック個体の形成は認められなかった．一方，0.25%ジェランガム添加培地でハイパーハイドリック個体の割合が最も高くなった．

Analysis of Psychological States of Elderly People in Process of Raising Plants by Means of Brain Waves and Semantic Differential Technique -Including Comparison with Young People-

In the present research, psychological states of elderly people in the process of raising plants were analyzed by means of brain waves and semantic differential technique.The experiment carried out from October 2004 to January 2005. Subjects were ten elderly individuals (mean age, 70.5 years) and ten young individuals (mean age, 21.0 years). Each subject raised three kinds of plants (Pachira glabra Pasq., Myrtillocactus geometrizans Console and Cyclamen persicum Mill. cvs.) for ten weeks in his or her house. At the zeroth, second, sixth and tenth week of the experiment, the subjects brought their plants to a laboratory at Ehime University. In the laboratory, the psychological states of the subjects in seeing their plants in front of them were evaluated by brain wave and semantic differential technique. The Cyclamen persicum Mill. cvs. of most subjects lost its flowers and leaves and declined in appearance at approximately the sixth week.The ratio of alpha wave to beta wave calculated an index of the degree of calmness of psychological state. As for the elderly subjects, the differences of the ratios of alpha wave to beta wave between the evaluated plants became smaller according to the raising weeks. The influence of the deterioration of the Cyclamen persicum Mill. cvs. on the psychological states of the elderly subjects was not observed. The semantic differential data were almost the same the brain waves data. These results indicated that elderly people's psychological states became stable and calm in the process of raising plants.

Genotypic differences in callus formation and regeneration of somatic embryos in Cyclamen persicum Mill

This study was performed in order to check the applicability of a protocol for somatic embryogenesis in Cyclamen persicum and to compare the in vitro response of cultivars belonging to different cyclamen growth types and flower colours obtained from two breeders. One hundred ovules per plant were prepared from 32 tested F1 hybrid cultivars represented by five plants each. Callus induction monitored after 8 weeks varied between 42 and 85%. Variation occurred between replications and single plants of a cultivar. Consistency and colour of the developing calluses were diverse. Only in 1 cultivar out of the 32 tested no regeneration of somatic embryos was obtained. The regeneration rates varied from 0 to 65% among cultivars. In the group of midi-type cultivars the regeneration response was lower than that in mini and giganteum types. High regeneration rates were observed in cultivars with flamed flowers.

Bioreactor design for propagation of somatic embryos

Six identical bioreactors were constructed and built at the Agricultural University of Norway to provide optimal conditions for plant cell regeneration from cells into somatic embryos (‘clonal or somatic seeds’). This was made possible through cooperation in COST87 by a European network in a working group on regeneration from plant cell cultures. The bioreactor design provides gentle stirring through a slow-speed stirrer that regularly changes direction of rotation to prevent ‘quiet’ zones in the suspension in which cells can settle and grow. In addition, the oxygen is provided, bubble-free, through thin silicone tubing loops that are hanging loose, moving with the liquid to prevent cell growth on these tubes. We used off-the-shelf components whenever possible, to reduce the costs to a minimum, which was another aim of the construction. The result was a suite of relatively inexpensive computer-controlled bioreactors that could control temperature, oxygen, pH, stirrer speed and stirrer direction. In addition, we have provided different light spectral qualities by simple means of filtering the light. Using the present software, the parameters can be set up to alter every hour during the 24-h day/night cycle. All our cultures have improved growth in the bioreactors compared to identical cultures in Erlenmeyer flasks. The cultures used are: embryogenic cultures of carrot (Daucus carota), Norway spruce (Picea abies), birch (Betula pendula), cyclamen (Cyclamen persicum) and shoot cultures of Christmas begonia (Begonia x cheimantha). The paper also discusses recommendations for improvements of the current system for future revisions.

EST Sequencing from Embryogenic Cyclamen persicum Cell Cultures Identifies a High Proportion of Transcripts Homologous to Plant Genes Involved in Somatic Embryogenesis

To learn more about the process of somatic embryogenesis in the economically important ornamental plant Cyclamen persicum, we initiated an expressed sequence tag (EST) project. A normalized cDNA library was constructed from embryogenic cell material in different developmental stages, and clones were subsequently sequenced from the 5′ end. A total of 2083 filtered EST with an average length of 499 bases were analyzed in this study and submitted to the international sequence databases. By computational analyses, the Cyclamen transcripts were annotated and checked against plant genes previously described to be involved in somatic embryogenesis. Approximately one third of those genes were covered by the Cyclamen EST analyzed in this study. A high proportion of homologs to genes involved in somatic embryogenesis in the model system Daucus carota (carrot) were found in the Cyclamen EST collection. Of special interest are transcripts encoding gibberellin oxidases and somatic embryogenesis receptor-like kinases (SERK), both of which were confirmed to be important for development of embryos from somatic carrot cells. In addition, the set of candidate genes was expanded by using gene ontology (GO) annotations as well as by comparison with EST that were shown to be upregulated during Glycine max (soybean) somatic embryogenesis in a microarray approach. Our computational biology approach disclosed a set of around 90 candidate genes that now can be tested in the wet lab for their influence on somatic embryogenesis in Cyclamen. The annotated Cyclamen transcripts are available via http://www.Cyclamen-est.de.

INHERITANCE OF FLOWER PIGMENT IN CROSSES BETWEEN CYCLAMEN CULTIVARS AND CYCLAMEN PURPURASCENS

Although interspecific hybrids between cyclamen (Cyclamen persicum) cultivars and C. purpurascens were produced by using the ovule culture, mode of inheritance of flower pigment remains obscure. Therefore, inheritance of anthocyanin in the petals in the crosses between diploid cyclamen cultivars and C. purpurascens was investigated in the present study. In every cross combination, including the crosses by using acyanic cyclamen cultivars without the eye, all the F1 progenies had a purple or reddish-purple eye in the petals, showing the eye expression was a dominant characteristic. All the F1 progenies contained anthocyanins in the petals, whereas some progenies in the crosses by using a yellow-flowered cultivar contained very small amount of anthocyanin. The main flower pigment of C. purpurascens was malvidin 3,5-diglucoside. All the F1 progenies also contained 3,5- diglucoside type anthocyanins, such as malvidin 3,5-diglucoside, peonidin 3,5-diglucoside and cyanidin 3,5-diglucoside, in the petals as the main pigments even in the crosses by using acyanic cultivars or cyanic cultivars containing malvidin 3-glucoside or peonidin 3-neohesperidoside in the petals as the main pigment. These results suggest that the expression of 5-glucosyltransferase in anthocyanin synthesis in the petals was dominant even in the crosses between cyclamen cultivars and C. purpurascens.

Induction of desiccation-tolerance in somatic embryos of Cyclamen persicum Mill.

SummaryAs a first step in the development of synthetic seed of Cyclamen persicum Mill. various procedures for induction of desiccation-tolerance in somatic embryos of cyclamen have been tested. Most important proved to be the careful selection of mature embryos by morphological characteristics. Torpedo-shaped somatic embryos with a size between 700 and 1000 µm exhibited the highest germination rate after desiccation to only 0.2 g H2O g–1 DW. Addition of 75 g l–1 polyethylene glycol (PEG 4000) and 10 mg l–1 abscisic acid to the maturation medium increased the germination rate of somatic embryos after desiccation to 28% compared to 4% in the control without these supplements.

Germination of Encapsulated Somatic Embryos of Cyclamen persicum

Somatic embryos of cyclamen [Cyclamen persicum Mill.] were produced using a liquid culture system. Two encapsulation techniques, conventional alginate beads and alginate hollow beads, were tested for globular cyclamen somatic embryos with the aim of developing synthetic seeds. Final germination from alginate beads was as high as observed for non encapsulated control embryos (97%), but germination was delayed. In contrast, germination from hollow beads was lower (71%) and occurred later. In hollow beads somatic embryos developed within the capsule, and outgrowth seemed to be more difficult than from alginate. Storage at 4 °C for four weeks resulted in a reduction of viability for controls as well as for encapsulated embryos. Incorporation of medium into the capsules improved the speed of germination for both capsule types. However, somatic embryos were not able to germinate on a medium-free support, even if encapsulated in beads containing medium.

Tomato spotted wilt tospovirus, Impatiens necrotic spot tospovirus and Watermelon silver mottle tospovirus

<i>Tomato spotted wilt tospovirus</i>, <i>Impatiens necrotic spot tospovirus</i> and <i>Watermelon silver mottle tospovirus</i>

Growth and Flowering Responses of Cyclamen persicum to Temperature and Photosynthetic Photon Flux

This research was conducted to investigate the growth and flowering responses of Cyclamen persicum Mill. `Piccolo' to temperature and photosynthetic photon fluxes (PPF), and to obtain fundamental data for production of good quality pot plant. Cyclamen plants with 10 fully unfolded leaves were grown in growth chambers maintained at three day/night temperatures [20/10 (LT), 25/15 (MT), and 30/20 °C (HT)] combined with three PPF [250 (LF), 350 (MF), and 650 (HF) μmol·m-2·s-1] under 14 h-photoperiod. After 3 months, the higher the temperature was, the greater plant width was. It was the greatest under MT/MF and HT/MF. The number of leaves was greater with increasing temperature and PPF. Petiole length, leaf size, and fresh weight were higher with increase in temperature but decrease in PPF. Days to flowering were lower in MT/MF and MT/HF, but higher under LT regardless of PPF. The number of flowers was the highest under MT/MF and MT/HF, and higher under MF in each temperature treatment. Flowering period was longer in LT and MT compared with HT. Most leaves of plants grown under HT curled upward because of boron deficiency induced by higher temperature and lower humidity. Chlorophyll content was higher in medium and low temperature, except LT/HF. The lower side of leaf in low temperature was more reddish compared to that in higher temperature due to some pigments considered as anthocyanin. Photosynthesis was the highest in MT/MF, but low in MT/HF and LT/HF in accordance with the chlorophyll fluorescence (Fv/Fm) which was lower under the same environment. These results indicate that 25/15°C and 350 μmol·m-2·s-1 yielded the best pot cyclamen in this study.