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Study of Stomata in Some Species of Alocasia and Syngonium of Family Araceae Juss

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Study of Stomata in Some Species of Alocasia and Syngonium of Family Araceae Juss www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 INTERNATIONAL JOURNAL OF ADVANCES IN PHARMACY, BIOLOGY AND CHEMISTRY Research Article Study of Stomata in some species of Alocasia and Syngonium of family Araceae juss. Meenakshi Vaidya S.V.K.M’s Mithibai College, Vile-Parle West, Mumbai 400056 ABSTRACT Araceae, a tropical family consisting of 109 genera and about 2,239 species. Plants are mostly herbaceous, habit rarely aquatic. Rootstock is rhizomatous or tuberous or cornous. Leaves are simple or compound, parallel or net veined. Laticifers are common. Silica bodies lacking, oxalate raphides present. Inflorescence is simple spadix with a spathe. Flowers are minute, sessile bisexual or more commonly unisexual with reduced perianth or without perianth. Stamens are six in a flower. Carpels are three, syncarpous. Ovules one - many on axile or parietal or basal or peudulous placenta. Fruit is berry. There are several genera belonging to Araceae whose taxonomic position is not clear. Stomata in Dieffenbachia, Scindapsus, Arisaema, Lysichiton and few species of Araceae stated that family is characterised by possession of 4 or more than 4 subsidiary cells in majority of its members representing the primitive status of the family within monocotyledons. So, stomatal complexes study in two genera and 11 species was undertaken in the present work to understand the taxonomic position of these members of Araceae and also to determine taxonomic utility of anatomical characters. Key words: Alocasia, Syngonium, paracytic, amphibrachyparacytic, brachyparatetracyctic, paratetracytic, cyclocytic, and brachyparacytic. INTRODUCTION Engler1 determined that if Araceae were to be Maharashtra. The details are as follows. The classified as a natural group, flower structure aloone arrangement of species is followed as recognized by was insufficient. The detailed anatomical and Engler and Krause 14- 17. morphological study led him to classify the family into 8 sub-Families. Structure and ontogeny of The identification was confirmed in consultation with stomata in monocots received attention as early as Indian National Herbarium and B.S.I. western circle. 1869 by Strasburger and later by many workers like The leaf cuticles were removed by treating with conc. Campbell2, Cuttler3, Benecke4, Solla5. Further HNO3 followed by 10 % KOH for 5-10 minutes considerable work has been done by Solereder and each. They were washed with water and stained with Meyer6, Shah and Gopal7-8, Williams9. 1 % saffranine or haematoxylin. The peels were Comprehensive work on the subject has Dunn et al10 washed again with water and dehydrated through and Dilcher11.Stomata of Philodendron have been alcohol-Xylol grades and mounted in DPX. studied by Vaidya12& stomata of some members of The photographs were taken on Nikon Malvaceae have been reported by Chachad & Microphotographic camera at 10x 45X magnification. Vaidya13. The arrangement of tribes and genera followed in the MATERIAL AND METHODS text is after Engler and Krause14-17. All the specimens required for present study were The terminology followed is as suggested by collected from various localities of Bombay and Dilcher11. 180 www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 S. No Genus Species Locality 1. Alocasia amazonica Bandra 2. Alocasia chelsonii Bhavan’s College garden 3. Alocasia lowii Panvel 4. Alocasia macrorhiza Bhavan’s College garden 5. Alocasia zebrina Bhavan’s College garden 6. Syngonium auritum-fantasy Bandra 7. Syngonium hoffmannii Bandra 8. Syngonium podophyllum Bandra 9. Syngonium podophyllum-artovirens Bandra 10. Syngonium ruth-fraser Bandra 11. Syngonium xanthophilum Bandra OBSERVATIONS lateral cells are semilunar with thick walls. 1. Alocasia amazonica( Fig. 1) Epidermal cells are wavy in outline with thin Stomata are brachyparacytic and walls. amphibrachyparacytic. Guard cells are kidney- 5. Alocasia zebrina (Fig. 5) shaped with thick inner and outer ledge. Stomata are paracytic. Guard cells are kidney- Subsidiary cells are semicircular in shape and shaped with thick inner and outer ledge. flank the sides of the guard cells and with thin Subsidiary cells are almost rectangular with thick wall. epidermal cells are irregular in shape with walls. Epidermal cell walls are wavy in outline thin walls. Cell contents are prominent. with thick walls. Cell contents are prominent. 2. Alocasia chelsonii(Fig. 2) 6. Syngoniumauritum fantasy (Fig. 6) Stomata are brachyparacytic and Stomata are brachyparatetracytic and cyclocytic. amphibrachyparacytic. Guard cells are kidney- Guard cells are kidney-shaped with thick inner shaped with thick inner and outer ledge. and thin outer ledge. Lateral subsidiary cells are Subsidiary cells are semicircular in shape and almost rectangular while polar subsidiary cells are flank the sides of the guard cells and with thin also almost rectangular with thick walls. walls. Epidermal cells quadrangular, pentagonal Epidermal cells are quadrangular, pentagonal and and hexagonal with thick walls. hexagonal with thick walls. Cell contents are 3. Alocasia lowii (Fig. 3) prominent. Stomata are brachyparatetracytic. Guard cells are 7. Syngonium hoffmannii (Fig. 7) kidney-shaped with thick inner and outer ledge. Stomata are paratetracytic. Guard cells are Lateral and polar subsidiary cells are almost kidney-shaped with thick inner and thin outer rectangular in shape with +- thick walls. ledge. Lateral and polar subsidiary cells are Epidermal cells are wavy in outline and irregular almost rectangular with thick walls. Epidermal in shape with thick walls. Cell contents are cells are irregular and polygonal with thick walls. prominent. Cell contents are prominent. 4. Alocasia macrorhiza (Fig. 4) 8. Syngonium podophyllum (Fig. 8) Stomata are paracytic and paratetracytic. Guard Stomata are paratetracytic. Guard cells are cells are kiendy-shaped with thick inner and thin kidney-shaped with thick inner and thin outer outer ledge. In paracytic type subsidiary cells are ledge. Subsidiary cells are almost rectangular semicircular in shape and in paratetracytic the with thick walls. Epidermal cells are pengatonal polar cells are almost quadrangular in shape and 181 www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 and hexagonal with thick walls. Cell contents are A. lowii brachyparatetracyctic prominent. A. macrorhiza paracytic&paratetracytic 9. Syngonium podophyllumatrovirens (Fig. 9) Tribe : Syngonieae Stomata are paratetracytic. Guard cells are Genus : Syngonium kidney-shaped with thick inner and thin outer S. auritum fantasy brachyparatetracytic & ledge. Subsidiary cells are almost semicircular in cyclocytic shape with thick walls. Epidermal cells are S. Hoffmannii paratetracytic irregularly polygonal with thick walls. Cell S. podophyllum paratetracytic contents are prominent. S. podophyllumatrovirens paratetracytic 10. Syngonium ruth-Fraser (Fig. 10) S. Ruth Fraser paratetracytic Stomata are paratetracytic. Guard cells are S. xanthophilum paratetracytic kidney-shaped with thick inner and thin outer Sub-tribe Alocasinae shows paracytic, ledge. Subsidiary cells are elongated and rounded brachyparacytic, amphibrachyparacytic, with thick walls. Epidermal cells are pengatonal brachyparatetracytic type of stomata. Tribe and hexagonal with thick walls. Cell contents are Syngaonieae has brachyparatetracytic and cyclocytic prominent. to paratetracytic type of stomata. 11. Syngonium podophyllumzanthophilum (Fig. 11) Stomata are paratetracytic. Guard cells are CONCLUSION kidney-shaped with thick inner and outer ledge. The present work includes 11 species of which 1 Subsidiary cells are semicircular in shape with species is paracytic, 5 species are paratetracytic, 1 thin walls. Epidermal cells are quadrangular, species is brachyparatetracytic, 2 species are pentagonal and hexagonal with thick walls. Cell brachyparacytic and amphibrachyparacytic, 1 species contents are prominent. is brachyparatetracytic and cyclocytic, 1 species is paracytic & paratetracytic. In majority of the RESULT & DISCUSSION species subsidiary cell number is 2, sometimes 4-6. Tribe : Steudenerinae The non-fixity of the stomatal type may itself be Sub-tribe : Alocasinae taken as an indicator of primitive condition of the Genus : Alocasia family A. zebrina paracytic A. amazonica amphibrachyparacytic & ACKNOWLEDGEMENT brachyparacytic The author is grateful to Dr. R.H. Shete for his A. chelsonii amphibrachyparacytic & valuable guidance in the completion of this work. brachyparacytic Fig. 1 Fig. 2 Alocasia amazonica Alocasia chelsonii 182 www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 Fig. 3 Fig. 4 Alocasi alawii Alocasia macrorhiza Fig. 5 Fig. 6 Alocasia zebrina Syngoniumauritum fantasy 183 www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 Fig. 7 Fig. 8 Syngonium hoffmannii Syngonium podophyllum Fig. 9 Fig. 10 Syngonium podophyllumatrovirens Syngonium ruth-Fraser 184 www.ijapbc.com IJAPBC – Vol. 5(2), Apr - Jun, 2016 ISSN: 2277 - 4688 Fig. 11 Syngonium podophyllumzanthophilum REFERENCES Monocotyledons. Taxon, 1975; 24(2-3): 281- 1. Engler A Zur Morphologie der Araceae. Bot. 288. Zeit., 1876; 34: 81-90, 97-105. 2. Campbell DH. On the development of the 10. Dunn DP, Sharma GK and Campbell CC. stomata of Tradescantia and Indian Corn. Stomatal pattern of dicotyledons and Amer. Nat., 1881; 15: 761-766. monocotyledons. Amer. Midland. Naturalist, 3. Cuttler DF. Juncales Vol IV in Anatomy of 1965; 74: 185-195. Monocotyldeons ed. C.R. Metcalfe,
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