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Gnanasekaran, G.
- A Study on the Caryopses Morphology of the Grass Genus Eragrostis in India
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Authors
Affiliations
1 Botanical Survey of India, Southern Regional Centre, Coimbatore – 641 003, IN
1 Botanical Survey of India, Southern Regional Centre, Coimbatore – 641 003, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 57 (2015), Pagination: 1-10Abstract
A study on the caryopses morphology of Indian Eragrostis Wolf using Light Microscope and Scanning Electron Microscope is presented. A total of 44 species have been studied. Emphasis has been given to their shape, dimensions, colour, outline in cross section and surface features. The shape varies from ovoid, obovoid, ellipsoid, oblong with truncate or obtuse ends, globose, subglobose, prism like and angled with or without lateral grooves. In cross section the shape varies from circular, cordate, obcordate, ovate and obovate etc. Surface cell reticulations are mostly narrow and rectangular.Keywords
Caryopses, Morphology, Eragrostis, Poaceae, India.Full Text
References
- BOECHAT, S.C. AND H.M. LONGHI-WAGNER. 2003. Análise do fruto em especies de Eragrostis Wolf (Poaceae). Iheringia 58: 131−166.
- COLBRY, V.L. 1957. Diagnostic characteristics of the fruits and florets of economic species of North American Sporobolus. Contr. U.S. Natl. Herb. 34: 1−24.
- GIRALDO-CANAS, D., P.M. PETERSON AND I. SANCHEZ VEGA. 2012. The genus Eragrostis (Poaceae: Chloridoideae) in northwestern South America (Colombia, Ecuador, and Peru): Morphological and taxonomic studies. Bibl. Jose Jeron. Trian. 23: 1–180.
- HEYWOOD, V.H. AND P.H. DAVIS. 1963. Principles of Angiosperms taxonomy. (Princeton NJ: Van Mostrand).
- LAZARIDES, M. 1997. A revision of Eragrostis (Eragrostideae, Eleusininae, Poaceae) in Australia. Austral. Syst. Bot. 10: 77−187.
- PETERSON, P.M. AND J. VALDES-REYNA. 2005. Eragrostis (Poaceae: Chloridoideae: Eragrostideae: Eragrostidinae) from north eastern Mexico. Sida 21: 1365–1420.
- PETERSON, P.M. AND I. SÁNCHEZ VEGA. 2007. Eragrostis (Poaceae: Chloridoideae: Eragrostideae: Eragrostidinae) of Peru. Ann. Missouri Bot. Gard. 94: 745−790.
- TERRELL, E. E. AND P. M. PETERSON. 1993. Caryopsis morphology and classification in the Triticeae (Pooideae: Poaceae). Smithsonian Contr. Bot. 83: 1−25.
- VIVEK, C.P., G.V.S. MURTHY AND V.J. NAIR. (2013) 2014. On the confusion in the identity of Eragrostis atrovirens, E. gangetica and E. nutans. Nelumbo 55: 94–10.
- Is Andrographis rotundifolia (Acanthaceae) Possibly Extinct?
Abstract Views :198 |
PDF Views:104
Authors
Affiliations
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road, Coimbatore - 641 003, Tamil Nadu, IN
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road, Coimbatore - 641 003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 57 (2015), Pagination: 46-49Abstract
Andrographis rotundifolia (Sreem.) Sreem., is not recollected after the type collection till to date and thus it is presumed here as possibly extinct. In addition, the seed morphology of the species is presented.Keywords
Andrographis, Coimbatore, Endemic, Possibly Extinct, Tamil Nadu.Full Text
References
- IUCN, 2012. IUCN Red List Categories and Criteria: Version 3.1. Second Edition. International Union for Conservation of Nature and Natural Resources (IUCN), Species Survival Commission, Gland.
- SREEMADHAVAN, C.P. 1966. A new variety of Andrographis neesiana Wt. from Madras state. Bull. Bot. Surv. India 8: 91-92.
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- Microhairs of Indian Eragrostis Wolf (Poaceae) and their Taxonomic Significance
Abstract Views :278 |
PDF Views:115
Authors
Affiliations
1 Botanical Survey of India, Andaman and Nicobar Regional Centre, Port Blair - 744102, Andaman and Nicobar Islands, IN
2 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Coimbatore - 641003, Tamil Nadu, IN
1 Botanical Survey of India, Andaman and Nicobar Regional Centre, Port Blair - 744102, Andaman and Nicobar Islands, IN
2 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Coimbatore - 641003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 58 (2016), Pagination: 48-56Abstract
The morphology of microhairs on leaf surfaces of 44 Eragrostis species from India is studied using Scanning Electron Microscope (SEM) and the results are presented. Three distinct types of microhairs have been observed viz. chloridoid, panicoid and enneapogon (intermediate) and their features are tabulated.Keywords
Eragrostis, India, Leaf Surface, Microhairs.Full Text
References
- AMARASINGHE, V. AND L. WATSON. 1990. Taxonomic significance of microhair morphology in the Genus Eragrostis Beauv. (Poaceae). Taxon. 39 (1): 59–65.
- BOR, N. L. 1960. The Grasses of Burma, Ceylon, India and Pakistan (excluding Bambuseae). Pergamon Press, London.
- CLAYTON, W. D. AND S. A. RENVOIZE. 1986. Genera Graminum, grasses of the world. Kew Bulletin Additional Series. 13: 1–389.
- GIRALDO-CANAS, D., P. M. PETERSON AND I. SANCHEZ VEGA. 2012. The genus Eragrostis (Poaceae: Chloridoideae) in northwestern South America (Colombia, Ecuador, and Peru): Morphological and taxonomic studies. Bibl. Jose Jeron.Trian. 23: 1–180.
- INGRAM, A. L. 2010. Evolution of leaf blade anatomy in Eragrostis (Poaceae). Syst. Bot. 35(4): 755–765.
- JOHNSTON, C. R. AND L. WATSON. 1976. Microhairs: A universal characteristic of non-festucoid grass genera? Phytomorphology. 26: 297–301.
- KARTHIKEYAN, S., S. K. JAIN, M. P. NAYAR AND M. SANJAPPA. 1989. Poaceae. In: Florae Indicae Enumeratio Monocotyledonae. Botanical Survey of India, Calcutta.
- TATEOKA, T., S. INOWE AND K. KAWANO. 1959. Notes on some grasses IX: Systematic significance of bicellular microhairs of leaf epidermis. Bot. Gazz. 121(2): 80–91.
- METCALFE, C. R. 1960. Anatomy of the Monocotyledons I. Gramineae. Oxford University, London.
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- VIVEK, C. P., G.V.S. MURTHY AND V. J. NAIR. 2012. A new species Eragrostis henryi (Poaceae: Eragrostideae) from Tamil Nadu, India. Nelumbo 54: 9– 12.
- VIVEK, C. P., G.V.S. MURTHY AND V. J. NAIR. 2013a. Eragrostis cilianensis (Poaceae: Eragrostideae): A new species from the hills of Kerala and Tamil Nadu, India. Indian J. Forestry 36 (3): 401–404.
- VIVEK, C. P., G. V. S. MURTHY AND V. J. NAIR. 2013b. Eragrostis jainii (Poaceae: Eragrostideae) A new species from Kerala, India. Nelumbo 55:1– 5.
- VIVEK, C. P., G. V. S. MURTHY AND V. J. NAIR. 2013c. Eragrostis nilgiriensis sp. nov. (Poaceae) from Nilgiri district, Tamil Nadu, India. Nord. J. Bot. 31: 700–703.
- WATSON, L., H. T. CLIFFORD AND M. J. DALLWITZ. 1985. The classification of Poaceae: subfamilies and subtribes. Australian J. Bot. 33: 433–484.
- Studies on the Taxonomic Significance of Leaf Microhairs of Subtribe Sporobolinae, Poaceae
Abstract Views :221 |
PDF Views:185
Authors
Affiliations
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road PO., Coimbatore – 641003, Tamil Nadu, IN
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road PO., Coimbatore – 641003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 60, No 2 (2018), Pagination: 141-147Abstract
In grass systematics, leaf epidermal features are very significant for classifying the difficult groups, within subfamilies and tribes. But the micromorphological studies on grasses are very limited. Therefore, foliar micromorphological characters for 24 taxa of the subtribe Sporobolinae Benth. (Poaceae) from India have been studied by using Scanning Electron Microscope (SEM) in detail and the surface features were documented. All the 24 taxa studied were found to have three types of surface features, one of the most useful characters to delimit the species and genera in the subtribe. Besides microhairs, macrohairs, intercostal silica bodies, hooks and prickles were also studied.Keywords
Poaceae, Sporobolinae, Microhairs, Silica Bodies, India.Full Text
References
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- BOR, N. L. 1960. The Grasses of Burma, Ceylon, India and Pakistan (excluding Bambuseae). Pergamon Press, London.
- CLAYTON, W. D AND S. A. RENVOIZE 1986. Genera Graminum, grasses of the world. Kew Bulletin Additional Series 13:1-389.
- ELLIS, R. P. 1979. A procedure for standardizing comparative leaf anatomy in the Poaceae II: the epidermis as seen in surface view. Bothalia 12(4):641-671.
- GIRALDO-CANAS, D., P. M. PETERSON AND I. SANCHEZ VEGA 2012. The genus Eragrostis (Poaceae: Chloridoideae) in northwestern South America (Colombia, Ecuador, and Peru): Morphological and taxonomic studies. Bibl. Jose Jeron. Trian. 23:1-180.
- INGRAM, A. L. 2010. Evolution of leaf blade anatomy in Eragrostis (Poaceae). Syst. Bot. 35(4):755-765.
- JOHNSTON, C. R. AND L. WATSON 1976. Microhairs: A universal characteristic of non-festucoid grass genera. Phytomorphology 26:297-301.
- KARTHIKEYAN, S., S. K. JAIN, M. P. NAYAR AND M. SANJAPPA 1989. Poaceae. In: Florae Indicae Enumeratio Monocotyledonae. Botanical Survey of India, Calcutta.
- METCALFE, C. R. 1954. Recent work on the systematic anatomy of the monocotyledons, Kew Bull., pp. 523-532
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- PALMER, P. G., AND A. E. TUCKER 1983. A scanning electron microscope survey of the epidermis of East African Grasses. Smith. Contrib. Bot. 53:1-72.
- PALMER, P. G., S. GERBETH-JONES AND S. HUTCHI-SON 1985. A scanning electron microscope survey of the epidermis of east African Grasses 3. Smith. Contrib. Bot. 55:1-136.
- PALMER, P. G. AND S. GERBETH-JONES 1986. A scanning electron microscope survey of the epidermis of East African Grasses. Smith. Contrib. Bot. 62:1-120.
- PALMER, P. G. AND S. GERBETH-JONES 1988. A scanning electron microscope survey of the epidermis of East African Grasses and West African suppliments. Smith. Contrib. Bot. 67:1-155.
- PRAT, H. 1932. The epidermis of Gramineae. Ann. Sci Nat. Bot. 14:117-324.
- SNOW, N. 1996. The phylogenetic utility of lemmatal micro-morphological characters in Leptochloa and related genera in subtribe Eleusininae (Poaceae, Chloridoideae, Eragrostideae). Ann. Misso. Bot. Gard. 83:504-529. doi:10.2307/2399991.
- STEBBINS, G. L. AND G. S. KHUSH 1961. Variation in the organization of the stomatal complex in the leaf epidermis of monocotyledons and its bearing on their phylogeny. American. J. Bot. 48:51-59.
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- WATSON, L., H. T. CLIFFORD AND M. J. DALLWITZ 1985. The classification of Poaceae: subfamilies and subtribes. Australian J. Bot. 33:433-484.
- Caryopses Morphology of Sporobolus (Poaceae: Eragrostidiae: Sporobolinae) in India and its Taxonomic Significance
Abstract Views :237 |
PDF Views:94
Authors
Affiliations
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road, Coimbatore – 641003, Tamil Nadu, IN
1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Lawley Road, Coimbatore – 641003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 62, No 1 (2020), Pagination: 16-26Abstract
The caryopses morphology of 16 taxa out of 18 taxa of Sporobolus (Poaceae) found in India is examined under Optical and Scanning Electron Microscopes. The macro- and micro-morphological characters such as shape, size, thickness (in cross section), embryo percentage, colour and surface testa ornamentation pattern were critically analysed to evaluate their taxonomic significance in the delimitation and identification of each taxon. Further, a bracketed dichotomous taxonomic key is provided here based on caryopses morphology to facilitate precise identification.Keywords
Caryopses, Morphology, Sporobolus, Poaceae, India.Full Text
References
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- PETERSON, P.M. AND I. SÁNCHEZ VEGA. 2007. Eragrostis (Poaceae: Chloridoideae: Eragrostideae: Eragrostidinae) of Peru. Ann. Missouri Bot. Gard. 94: 745−790.
- TERRELL, E.E. AND P.M. PETERSON. 1993. Caryopsis morphology and classifi cation in the Triticeae (Pooideae: Poaceae). Smithsonian Contr. Bot. 83: 1–25.
- VIVEK, C.P., G.V.S. MURTHY, G. GNANASEKARAN, K.A.A. KABEER AND V.J. NAIR. 2015. A study on the caryopses morphology of the grass genus Eragrostis in India. Nelumbo 57: 1−10.