Screening of falvonoids of leaf materials of nine dry herbarium specimens of three natural hybrids and six of their putative parental species collected from Sarawak and Sabah have been carried out. Eight spots containing phenolic acids, flavonols, flavones, leucoanthocyanins and unknown 1 and 3 were identified from the chromatographic profiles. Phenolic acid and ellagic acid, quercetin, kaempferol, unknown 1 and unknown 3 were prevalence: quercetin and kaempferol were present in all taxon except Nepenthes tentaculata and Nepenthes gracilis respectively; phenolic acid was undetected in Nepenthes rajah and Nepenthes muluensis, similarly ellagic acid was not recorded in Nepethes rajah and Nepenthes gracilis. Flavonoids compound termed here as unknown 2 and 3 were equally prevalence in all the taxon screened but they were absent from Nepenthes muluensis and Nepenthes gracilis, Nepenthes burbidgeae, Nepenthes tentaculata and Nepenthes gracilis respectively. Luteolin was found in Nepenthes rajah and Nepenthes muluensis and hybrids Nepenthes x Alisaputriana and Nepenthes x Sarawakiensis only whereas cyanidin was detected in Nepenthes rajah, Nepenthes mirabilis and Nepenthes gracilis and hybrids Nepenthes x Alisaputriana and Nepenthes x Ghazallyiana. Myricetin and apigenin were absent in all these taxon studied. Chromatographic patterns of the three hybrids studied showed complementation of their putative parental species.
Jumaat H. Adam , Ramlan Omar and C.C. Wilcock , 2002. Phytochemical Screening of Flavonoids in three Hybrids of Nepenthes (Nepenthaceae) and their Putative Parental Species from Sarawak and Sabah
. Journal of Biological Sciences, 2: 623-625.