PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Philodendron”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 recordsLinked to original sources
PubMed1980

Allergic contact dermatitis from Philodendron scandens KOCH et SELLO subsp. oxycardium (SCHOTT) BUNTING ("Philodendron scandens cordatum").

Allergic contact dermatitis due to Philodendron scandens KOCH et SELLO subsp. oxycardium (SCHOTT) BUNTING ("Philodendron scandens cordatum") is seldom reported. In four patients with dermatitis, allergy to philodendron species was found through patch testing with leaves, stems and ether extracts from eight philodendron species. Although this allergy appears to be rare, it ought to be considered in patients with dermatitis on hands, arms and face.

Adult↗
PubMed1991

Philodendron-induced dermatitis: report of cases and review of the literature.

Plants of the genus Philodendron, and the family Araceae, were reported as causing dermatitis as early as 1923. The allergenic compounds in philodendrons are resorcinols, which share common chemical side chains with the allergenic catechols of Toxicodendron members of the family Anacardiaceae. I report here two cases of allergic contact dermatitis to Philodendron species commonly found in the Hawaiian islands. Philodendron dermatitis, however, is not confined to tropical or subtropical areas. Exposure may occur in nursery workers in temperate climates and in the home environment worldwide.

Acute Disease↗
PubMed2002

Study of homeosis in the flower of Philodendron (araceae): a qualitative and quantitative approach.

This study deals specifically with floral organogenesis and the development of the inflorescence of Philodendron squamiferum and P. pedatum. Pistillate flowers are initiated on the lower portion of the inflorescence and staminate flowers are initiated on the distal portion. An intermediate zone consisting of sterile male flowers and atypical bisexual flowers with fused or free carpels and staminodes is also present. This zone is located between the sterile male and female floral zones. In general, the portion of bisexual flowers facing the male zone forms staminodes, and the portion facing the female zone develops an incomplete gynoecium with few carpels. The incomplete separation of some staminodes from the gynoecial portion of the whorl shows that they belong to the same whorl as the carpels. There are two levels of aberrant floral structures in Philodendron: The first one is represented by the presence of atypical bisexual flowers, which are intermediates between typical female flowers and typical sterile male flowers. The second one is the presence of intermediate structures between typical carpels and typical staminodes on a single atypical bisexual flower. The atypical bisexual flowers of P. squamiferum and P. pedatum are believed to be a case of homeosis where carpels have been replaced by sterile stamens on the same whorl. A quantitative analysis indicates that in both species, on average, one staminode replaces one carpel.

Flowers↗
PubMed1999

Beetle pollination of Philodendron solimoesense (Araceae) in French Guiana.

The pollination of Philodendron solimoesense (subgenus Meconostigma) was studied in four populations of French Guiana. Flowering is asynchronous within each population during July, and the flowering cycle is a 2-d process. Numerous insects visit Philodendron inflorescences, but the main pollinator seems to be Cyclocephala colasi (Scarabaeidae, Dynastinae). The pollination process displays aspects typical of beetle pollination: the production of heat and of a strong odor, the presence of a food reward (stigmatic secretion and sterile male flowers), and the presence of a copulation chamber. Flower heat production is important (ca. 11 degrees C above the ambient air) and may help to volatilize the fragrance. Attraction and choice-test experiments showed that C. colasi is not likely to depend on chemical information (such as pheromone) to localize conspecifics but may rely instead on stimuli produced by the inflorescences in order to meet mating partners.

Journal Article↗
PubMed2001

Morphogenetic responses of six Philodendron cultivars in vitro.

In vitro morphogenic response of nodal explants from six cultivars of Philodendron viz, blue mistic, painted lady, pink prince, pluto, royal queen and green emperor was studied. Frequency and number of shoot formation depend on the cultivars and concentration of BAP. High frequency and number of shoot formation were obtained w hen the nodal explants were cultured in Nitsch medium supplemented with BAP (6.8-11.8 microM), sucrose (2%) and agar (0.45%), initially in the dark for 8-10 weeks followed by 16 hr photoperiod. Regenerated shoots were rooted on medium without growth regulators. After two weeks of hardening, rooted and rootless shoots were established in the soil with more than 90 and 65% survival rates respectively, while the unhardened plantlets showed a much lower percentage (20%) establishment. A standard protocol for the rapid multiplication of Philodendron is presented.

Genotype↗
PubMed2001

Diffusion pathway for oxygen into highly thermogenic florets of the arum lily Philodendron selloum.

Thermogenic inflorescences of some arum lilies have the highest rates of respiration known among plants. Peak rates of oxygen consumption in the sterile male florets of Philodendron selloum Koch exceed 0.3 micromol x s(-1) x g(-1) when the inflorescence warms to 38 degrees C. This study describes the morphology of the oxygen diffusion pathway between the atmosphere and the parenchymal cells of the florets. Dimensions of the florets, stomata, interstitial gas network, and cells provide data for diffusion models of the PO2 profiles at each level of the 'oxygen cascade'. The lowest calculated PO2 of 4.7 kPa (35 mmHg) at the axis of the thickest part of the floret indicates that maximum respiration does not reach the point of diffusion-limitation, confirming earlier physiological measurements of the dependence of oxygen consumption rate on environmental PO2. Adequate aeration of all cells is achieved by appropriate floret size, despite a stomatal density less than 5%, and interstitial gas fraction less than 2%, of values commonly found in leaves.

Biological Transport↗
PubMed2002

Bioelectrical potentials of Philodendron cordatum: a new method for investigation of behavior in plants.

We explored the prospect of using the bioelectrical potentiaLs of Philodendron cordatum as a new method for studying the behavior of plants. The bioelectrical potentials were recorded from equipment typically associated with EEG recordings. Plants were exposed to a 6-hr. training period of light only, dark only, or alternating 1-min. periods of light/dark. Following training, all plants were exposed to a 10-min. testing period in darkness during which bioelectrical potentials were recorded. Power of the bioelectric potentials was compared between groups of plants for frequencies between 0.1 and 10.0 Hz. Significant main effects of group and frequency were found, raising questions about the possibility of "learning" in P. cordatum.

Animals↗
PubMed1990

Philodendron--an infant death.

An 11 month old child chewed the leaves of a philodendrum plant (Araceae) and developed oropharyngeal erosions and dysphagia. Esophageal erosions of the mid third of the esophagus and on esophageal stricture at the level of the cricoid were diagnosed 16 days post ingestion. Unexpected sudden death on day 17 was attributed to vagotonia secondary to the esophageal lesions caused by philodendron leaves.

Cause of Death↗
PubMed1996

Resorcinols and catechols: a clinical study of cross-sensitivity.

BACKGROUND: All allergic contact dermatitis caused by Philodendron species is common in the Hawaiian islands, and Toxicodendron species are the most common causes of plant-induced allergic contact dermatitis in North America. OBJECTIVE: The purpose of this study was to determine the incidence of cross-sensitivity between these plant species. METHODS: Alkylresorcinols (pentadec[en]yl and heptadec[en]ylresorcinols) were isolated and purified from extracts of Hawaiian-grown Philodendron scandens subspecies scandens and Philodendron lacerum. Alkylcatechols (mixtures of pentadec[en]ylcatechols from an extract of Toxicodendron radicans (poison ivy) were obtained from the Division of Biologics Standards (National Institutes of Health, Bethesda, MD). Seventeen patients from Hawaii and 8 patients from northern California were skin tested with 5 microL (concentrations, 1 to .001 mg/mL) of each allergen applied to the flexor forearm. The test sites remained open and were graded at 72, 96, and 144 hours. All 8 patients from California were naive to Philodendron species, and 8 patients from Hawaii were naive to Toxicodendron species. RESULTS: No cross-reactivity occurred in patients who were Philodendron sensitive and Toxicodendron naive when tested to the homologous Toxicodendron catechols. Conversely, with one exception, no cross-reactivity occurred in patients who were Toxicodendron sensitive and Philodendron naive when tested to homologous Philodendron naive when tested to homologous Philodendron resorcinols. CONCLUSION: Patients who are sensitive to Philodendron species (or other resorcinol-containing plants) may not necessarily be cross-sensitive to Toxicodendron species and vice versa.

Adolescent↗
PubMed1991

Philodendron/dieffenbachia ingestions: are they a problem?

Ingestions involving the philodendron/dieffenbachia members of the Arum family are allegedly associated with the development of intense irritation of mucous membranes, resulting in swelling of the tongue, lips and palate. Although numerous literature citations promote their toxicity, there are few case reports which substantiate a cause-effect relationship between ingestion and resultant symptomatology. To assess the toxic manifestations associated with the ingestion of these plants, a retrospective review of such cases reported to a Regional Poison Information Center was performed. 188 cases were identified and the integrity of the leaf had been broken in all cases. Philodendrons accounted for 67.5% and dieffenbachias for 32.5% of the cases. 72.8% involved children aged 4-12 months. Only 2.1% (4) of the patients were symptomatic (dieffenbachia-3; philodendron-1). In all cases, the symptoms occurred within 5 minutes of the exposure and were of short duration and the outcome was classified as minor. In this 24 month senses of 188 exposures, severe oral complications and the delayed development of symptoms were not observed.

Adolescent↗