Ixora L. - an Overview
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ejpmr, 2016,3(2), 146-154 SJIF Impact Factor 2.026 EUROPEAN JOURNAL OF PHARMACEUTICAL Review Article Ardra et al. AND MEDICAL Euro RESEARCHpean Journal of Pharmaceutical and Medical ResearchISSN 3294 -3211 www.ejpmr.com EJPMR IXORA L. - AN OVERVIEW Usha M.1*, Reginald Appavoo M.2 and Immanuel G.3 1Department of Plant Biology and Plant Biotechnology, Sree Devi Kumari Womens College, Kuzhithurai, Kanyakumari District, Tamilnadu, India. 2Department of Plant Biology and Plant Biotecchnology, Scott Christian College, Nagercoil, Kanyakumari District, Tamilnadu, India. 3Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Kanyakumari District, Tamilnadu, India. *Correspondence for Author: Usha M. Department of Plant Biology and Plant Biotechnology, Sree Devi Kumari Womens College, Kuzhithurai, Kanyakumari District, Tamilnadu, India. Article Received on 10/12/2015 Article Revised on 01/01/2016 Article Accepted on 20/01/2016 ABSTRACT Rubiaceae is a large family of about 500 genera and 6000 species, of which 489 species are found in India. Most of them are tropical trees and shrubs. A few members are herbs growing in temperature climates. This family is represented in India by 77 genera and 286 species of which as many as 124 species and 11 varieties i.e. approximately 48% are endemic to peninsular India. Different classes of chemical constituents include alkaloids, anthraquinones, phenolic derivatives; catechins, di and triterpenoids, iridoid glycosides etc. are present in these family members. The second subfamily, Ixoroideae includes a large genus Ixora. Theyare popular ornamental plants grown in the tropics for their beautiful inflorescences which are different shades of white, yellow, orange, pink and red. In general the classification and identification of species and cultivars in this genus has been very difficult.This review provides information regarding the works undertaken in different aspects of various species of Ixora. KEYWORDS: Ixoroideae, endemic. INTRODUCTION a. Population Studies Ixora is a well- defined genus of sub-shrubs; shrubs and There is a great worldwide interest in the study of rare, small trees comprising about 400 taxa (Willis, 1966), endangered and threatened plants these days, because of which are largely pan tropical in distribution with the the chances of them becoming extinct due to various greatest diversity of species occurring in the South east reasons. In Kerala, five species of Ixora are endemic to Asian region (Fosberg and Sachet, 1989). It belongs to the Western Ghats (Nayar et al., 2006). One among them the second subfamily, Ixoroideae of family Rubiaceae. is Ixora johnsonii Hook. f. It was described by Joseph Hooker (1880) has reported 37 species from the Indian Dalton Hooker in 1880 based on a single collection of sub-continent, and Gamble (1921) has recorded 17 Rev. Johnson made in 1865 from Wennamala, Cochin, species as occurring in south India. Ixora are grown in Kerala. This plant was rediscovered by Dan et al. (1997); Indian gardens, on account of their brilliantly coloured Binu (1999) in Pathanamthitta district; and flowers and dark green hand some foliage (Bor and Prasanthkumar and Sujanapal (2008) in Kottayam Raizada, 1982; Husain and Paul, 1988). Van Rheeda district. Population density/ distribution analysis was states in Hortus Malabaricus that the flowers of this done by Usha et al (2012 & 2013) in Kottayam and genus are offered to the God (Bor and Raizada, 1982). Pathanamthitta districts of Kerala and established its Various species of Ixora are used as a medicine in conservation status. Ayurveda, Folk, Siddha and Unani systems of medicine (Udayan and Indira Balachandran, 2009). This review encompasses information on population studies, pharmacognosy, pharmacological studies, phytochemistry, molecular and micropropagation studies of various species of Ixora. www.ejpmr.com 146 Ardra et al. European Journal of Pharmaceutical and Medical Research b. Pharmacognostical studies. Sl. Pharmacognosy in Plant Ixora species Reference No. parts Four taxa of Ixora - I. barbata, 1 Wood anatomy Sharma (1970). I. fulgens, I. javonica and I. coccinea 2 All Ixoroideae Fibre tracheids Koek–Noorman (1972). I. andamensis, I. monticola and Giant stomata with long 3 Husain and Paul (1985). I. squalierei radiating striae I. coccinea, I. coccinea var. lutea, I. chinensis, I. rosea, I. williamsii, I. macrothyrsa, I. andamensis, I. javanica, I. cuneifolia, I. pubirama, I. roxburghii, I. tigriomustax, I. monticola, I. subsessilis, I. goalparensis, I. longibracteata, I. polyantha, I. captuliflora, I. finlaysoniana, I. multibracteata, Leaf anatomy - in connection 4 Husain and Paul (1989). I. johnsonii, I. saulierei, I. malabarica, with the epidermis I. leucantha, I. leucantha var.malabaria, I. barbata, I. hymenophylla, I. katchalensis, I. elongata, I. arborea, I. brachiata, I. brunnescens, I. notoiana, I. calycina , I. undulate, I. thwaitterii, I. grandifolia , I. grandifolia var.rosella and var . kurzeana 5 I. coccinea Root anatomy Sudhakaran Nair (2001). 6 I. brunnescens Bark and wood anatomy Jayakumar (2003). 7 I. coccinea Standardization of the leaves Vadivu et al. (2009). Pharmacognostical 8 I. johnsonii Usha et al (2012) standardization -leaves c. Phytochemical studies Sl. Ixora Plant parts Chemical compounds and activity Reference No. species A liquid acid free from glycerides-the lower homologue Δ 9-11- Octadecadienoic 1 I. coccinea Root bark - Kartha and Menon (1943). acid (CH 3-(CH2 )5 CH =CH- CH=CH- (CH2 ) 7 -COOH) 2 I. coccinea Bark Mannitol Kartha and Menon (1943). 3 I. coccinea Flowers Hydrolysable neutral principle Varghese (1956). 4 I. parviflora Roots D- Mannitol Anjaneyulu et al. (1965). 5 I. coccinea Root bark Free higher fatty acids Kartha (1967). 6 I. parviflora Leaves Alcohols - ixoral and β –sitosterol Ali and Kapadia (1968). Triterpenoids –lupeol and betulin; sterols – 7 I. chinensis Leaves Hui and Ho (1968). β –sitosterol and stigmasterol Flowers and Subramonian and Nair 8 I. coccinea D- Mannitol stem bark (1971). Roots, stem Subramonian and Nair 9 I. parviflora bark, leaves D- Mannitol (1971). and flowers Subramonian and Nair 10 I. coccinea Leaves Flavonoids –rutin (1971). Flavo-flavonoids cyanidin-3- rutinoside Subramonian and Nair 11 I. coccinea Flowers and leucocyanidin glycoside (1971). Leaves and Flavonoids - rutin and kaempferol -3- Subramanian and Nair 12 I. arborea flowers rutinoside (1971). www.ejpmr.com 147 Ardra et al. European Journal of Pharmaceutical and Medical Research 13 I. parviflora Stem bark β –sitosterol Sastry (1974). 14 I. undulata Bark Tannins and flavonoids Saxena (1975). A yellow coloring matter related to quercetin, astringent principle (a wax) and 15 I. coccinea Flowers Nadkarni (1976). a neutral crystalline substance (M.P. 2570 C) I. arborea Whole plant 16 and I. excluding Tannins Atal et al. (1978). nigricans root Capric (1%), lauric (3.1%), myristic (4.7%), palmitic (11.4%), Daulatabad and Ankalagi 17 I. arborea Seed oil stearic (11.9%), arachidic (2.9 %), (1982). behenic (2 %), oleic (18.7 %), and linoleic (44 %) acid. Flavone glycoside chrysin: 5-0-β-D – 18 I. arborea Stem Chauhan et al. (1984). xylopyranoside A mixture of monoglycosides - cyanidin Rastogi and Mehrotra 19 I.coccinea Flowers and delphinidin (1991). Ferulic acid and its regionmers 3 – 20 I. javanica Flower Nair et al. (1991). hydroxyl -4 – methoxy cinnamic acid 21 I. coccinea Whole plant Triterpenoid – Ursolic Acid Panlilio et al. (1992). 22 I. coccinea Root Saturated and unsaturated fatty acids Padmaja et al. (1993). 23 I. coccinea Leaves Lupeol Reena et al. (1994). 24 I. coccinea Leaves Triterpenoid –lupeol Zachariah et al. (1994). Sudhakaran and Nair 25 I. coccinea Root Biochemical effects (2001). 26 I. coccinea Dried flowers New cycloartenol esters. Ragasa et al. (2004). In-vitro free radical scavenging activity- 27 I. coccinea Flower Saha et al. (2008). DPPH assay 28 I. brachiata Bark Antioxidant- study Poojari et al. (2009). Phytochemical and biological 29 I. arborea - Aktar et al. (2009). investigations Leaves and Phytochemical and biological 30 I. lutea Sultana et al. (2009). stem investigations Leaves A-type proanthocyanidin trimer and other 31 I. coccinea Idowu et al. (2010). constituents and antioxidants. Chemical Profile- Pri & Sec. metabolites, Leaves, stem 33 I. johnsonii TLC, HPTLC, GC-MS & Antioxidant Usha (2012). and root. studies. Flavonoids in all parts. d. Antimicrobial studies Sl. Ixora species Plant parts Microbial activity Reference No 1 I. coccinea Roots Helminthosporium sativum Bhatnagar et al. (1961). Whole plant 2 I. arborea Antiviral activity - Ranikhet virus Bhakuni et al. (1971). excluding root. Antiviral properties against potato 3 I. parviflora Stem bark Singh and Singh (1972). virus -X. Interferon like activity against 4 I. polyantha Aerial portion Babbar et al. (1982). vaccinea virus Antifungal activity- inhibition of 5 I. coccinea Pollen fungal spore germination of Tripathi et al. (1982). Helminthosporium oryzae. Leaves and Vijaya Kumari et al. (1987) 6 I. coccinea Antimicrobial principles flowers and Panikkar (1987). Bacteria -Bacillus subtilis, 7 I. coccinea Flower oil Salmonella richmani, S. stanley Yadav (1989). and the fungus Aspergillus flavum. www.ejpmr.com 148 Ardra et al. European Journal of Pharmaceutical and Medical Research Antimutagenic activity against carcinogen, 4 nitroquinoline in two 8 I.coccinea Whole plant – Panlilio et al. (1992). Bacillus subtilis strains, namely – + – H17 Rec and M45