Catalpa

Naphthoquinones Catalpa ovata SiOj Hx - AcOEt UV 254, 366 nm Identification 61 0 q... 

Eucalyptus, cotinus, and catalpa are also often grown as coppiced or pollarded shrubs in shrub or mixed borders since their leaves become strikingly larger when grown in this way, forming an attractive backdrop to other plants. Plants may be cut back annually or, to make a more substantial presence in the garden, every two or three years. 

The iridoid monoterpenes, catalpal and catalposide occur in nectar in flowers of Catalpa speciosa (Bignoniaceae) and are toxic to many non-coadapted insects which attempt to rob nectar. The bees which normally pollinate this plant are relatively insensitive to the effects of these compounds (88). 

N.A. Bignonia catalpa (L.) Karst. Catalpine, oxylenzoic acid, protocatechetic acid." Treat asthma, whooping cough, spasmodic coughs. 

Berberis aquifolium, Mahonia aquifolium Bignonia catalpa... 

Extrafloral nectar production can be raised in response to both nectar removal (Koptur, 1992 Heil et al, 2000) and tissue damage. Stephenson (1982), using Catalpa speciosa, was the first to investigate the latter mechanism. He diluted the nectar of individual nectaries with water and demonstrated that the diluted nectar collected from sphingid-damaged leaves was richer in solutes compared with nectar collected from undamaged leaves. Smith et al (1990) point out that this does not resolve whether C. speciosa actually increased its nectar volume or whether it produced the same volume with an increased solute concentration. 

Catalpa speciosa Herbivory Increase in solutes Increase in solutes Stephenson, 1982... 

Stephenson, A. G. (1982). The role of the extrafloral nectaries of Catalpa speciosa in limiting herbivory and increasing fruit production. Ecology 63 663-669. 

In this study, 212 samples in 126 species were tested three species had been known to be alkaloidal Campsis radicans (1/3), Catalpa bignonioides (1/4), and Slenolobiwn (= Teconta) skins. 

Machida K, Ogawa M, Kikuchi M (1998) Studies on the Constituents of Catalpa Species. II. Iridoids from Calalpae Fructus. Chem Pharm Bull 46 1056... 

OSB, and 1,4-dihydroxynaphthoic acid, or its diketo tautomer, have been implicated in the biosynthesis of a wide range of plant naphthoquinones and anthraquinones. There are parallels with the later stages of the menaquinone sequence shown in Figure 4.55, or differences according to the plant species concerned. Some of these pathways are illustrated in Figure 4.58. Replacement of the carboxyl function by an isoprenyl substituent is found to proceed via a disubstituted intermediate in Catalpa (Bignoniaceae) and... 

Cc r 0 Wood and tissue cultures of Catalpa ovata (Bignoniaceae) [76] [77],... 

Wood and cell cultures of Catalpa ovata [88-89], wood of Haplophragma adenophyllum [90], Tabebuia guayacan [91] T. pentaphylla [83], Zeyhera tuberculosa [92] Roots of Ekmanianthe longiflora (all Bignoniaceae) [78], Biological Effect inhibition of topoisomerase II [16]. 

OH Wood and cell cultures of Catalpa ovata [88-89] Zeyhera tuberculosa [92]. 

Helianthus annuus (Asteraceae), Catalpa ovata (Bignoniaceae), Arachis hypogaea (Fabaceae), Triticum aestivum (Poaceae), Cimicifuga racemosa, C. spp. (Ranunculaceae) [rhizome], Tamarix aphylla (Tamaricaceae) [leaf]... 

Catalposide (= Catalpin) Catalpa ovata (Bignoniaceae), Veronica Bitter [diuretic, laxativej... 

Catalpol Catalpa (Bignoniaceae), Buddleja Phagostimulant (bitter)... 

Lapachol (95, from the lapacho tree, genus Tabebuia, family of the catalpa trees, Bignoniaceae) and its analogues show very broad therapeutic capabilities , including activity against cancer which results in apoptosis and inhibition in metastasis, antimicrobial, antifungal, antimalarial and other activities . However, clinical application of lapachol is limited by its high toxicity. Lapachol forms complexes with many metal ions. 

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