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Download 120203 ECO-CHRONICLE 51 Review Article ECO CHRONICLE ISSN: 0973-4155 Vol. 12, No. 2, June, 2017 PP: 51 - 57 AN OVERVIEW OF THE INDIAN GRASSES AND THEIR SIGNIFICANCE Kabeer, K.A.A.1 and Sasikala, K.2 and Murugesan, M. 1 Botanical Survey of India, Southern Regional Centre, TNAU Campus, Coimbatore, Tamil Nadu 2 Mahatma Gandhi Govt. Arts College, Mahe, U.T of Puducherry 3 Botanical Survey of India, Eastern Regional Circle, Shillong , Meghalaya Corresponding author: [email protected] ABSTRACT The family Poaceae is one of the largest families of flowering plants. It comprises of about 20% of vegetation and is the most important family to mankind agriculturally, economically and ecologically. The economic importance of grasses in India is presently discussed. Key words: Grasses, economic importance, Poaceae, India INTRODUCTION Grasses belong to the family Poaceae form a natural and almost every other terrestrial habitat. Grass-dominated homogenous unique group of flowering plants with biomes are called grasslands. Grasslands include remarkable diversity (Kabeer & Nair, 2009). Undoubtedly, pampas, steppes, and prairies. Grasses provide food to Poaceae forms the most fascinating family and plays a many grazing mammals such as livestock, deer, and significant role in the lives of human beings and animals elephants as well as to many species of butterflies and (Mitra and Mukherjee, 2005). The value and culture of moths. Many types of animals eat grass as their main cereal grasses dates back to a period when man was source of food, and are called graminivores include cattle, emerging from wild beast stage (Gould, 1968; Ahmad et sheep, horses, rabbits and many invertebrates, such as al., 2010). The members of this group are present in all grasshoppers and the caterpillars of many brown conceivable habitats, suitable for the growth of plant butterflies. Grasses are also eaten by omnivorous or even communities, and in every climatic region (Mitra and occasionally by primarily carnivorous animals. Mukherjee, 2005). The family Poaceae or Gramineae is one of the largest and nearly ubiquitous families of The grasses are represented with ca. 780 genera and monocotyledonous flowering plants and also known as around 12,000 species in the world (Christenhusz, and grasses. It is fifth largest plant family of the world following Byng, 2016). Grasslands such as savannah and plain the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. where grasses are dominant are estimated to constitute Poaceae includes the cereal grasses, bamboos and the 40.5% of the land area of the Earth, excluding Greenland grasses of natural grassland and cultivated lawns (turf) and Antarctica. Grasses are also an important part of the and pasture land. Grasses have hollow stems except at vegetation in many other habitats, including wetlands, the nodes and narrow alternate leaves borne in two ranks. forests and tundra. The Poaceae are the most The lower part of each leaf encloses the stem, forming a economically important plant family, providing staple foods leaf-sheath. from domesticated cereal crops such as maize (corn), wheat, rice, barley, and millet as well as forage, essential Grasses are the dominant vegetation in many habitats, oils, medicinal importance, paper making, building including grassland, salt-marsh, reed swamp and steppes. materials (bamboo, thatch, straw) and fuel (ethanol) They also occur as a smaller part of the vegetation in (Reynolds, 2016). 52 ECO-CHRONICLE Grasses used as food resources: have some degree of fodder value. However, it is known that grasses that are more leafy are preferred by cattle. Grasses are directly supply about 60% of the world’s food for human consumption In the form of cereal grains. The The following grasses are reported to be the fodder principal cereals include Wheat, Rice, Maize, Barley, Oats, grasses most favoured by cattle include Alloteropsis Sorghum and Rye. Oryza sativa (Rice) and Triticum cimicina, Andropogon ascinoides, A. lividus, A. pumilus, aestivum (Wheat) are the staple diet for hundreds of Arthraxon castratus, A. hispidus, A. lanceolatus, A. millions of people and grown largely in the tropics, sub- lancifolius, Arundinella pumila, Brachiaria distachya, B. tropics and temperate regions. Several grasses such as eruciformis, B. semiverticillata, Cenchrus glaucus, Pennisetum typhoides, Setaria italica, Sorghum spp., Zea Centotheca lappacea, Chloris barabata, C. virgata, mays, Panicum miliaceum are usually grouped together Chrysopogon orientalis, C. polyphyllus, Coix aquatica, and termed “Millets” are grown in larger areas. The hill Cymboppogon gidraba, C. polyneuros, Cynodon barberi, tribes of North-East India and South India cultivate Coix- C. dactylonm, Dicanthium caricosum, Digitaria longiflora, lacryma-jobi and prepare a beer from the grains or eat D. wallichiana, Echinochloa colonum, Enteropogon them as a kind of soft food. Hygroryza aristata also utilized monostachyos, Eragrostis ciliaris, E. coarctata, in a similar fashion. Secale cereale (Rye) and Hordeum E.gangetica, E. japonica, E. nigra, E, nutans, E. riparia, vulgare (Barley) are cultivated at the higher altitudes and E. tef, E. tenuifolia, E. tremula, E. unioloides, E. viscosa, in parts of Himalayas become the staple cereal of the Eremopogon foveolatus, Eriochloa procera, Eulalia inhabitants. Eleusine coracana (Ragi, Finger millet) also trispicata, Hemarthria compressa, Hygroryza aristata, one of the very common and more nutritious food grains Imperata cylindrica, Isachne globosa, Ischaemum indicum, in southern, western and northern India. The inhabitants I. pilosum, I. rangacharianum, Iseilema hackelii, I. of the area make this into cakes, soft foods and sweet prostratum, Leptochloa obtusiflora, Lophatherum gracile, meats. A beer is prepared from this grain by the hill tribes Melanocenchris monoica, Microstegium ciliatum, M. of the region. Avena sativa, Panicum sumatrense, nudum, Ophiuros exaltatus, Oplismenus compositus, O. Paspalidium flavidum, and Paspalum longifolium also have undulatifolius, Oryza meyeriana, panicum curviflorum, P. some value as food materials (Kabeer & Nair, 2009). psilopodium, paspalidium geminatum, P. punctatum, Paspalum distichum, P. vaginatum, Pennisetum galucum, Apart from these, the grasses like Digitaria cruciata var. P. polytachyon, Poa nemoralis, Polypogon fugax, esculenta is rarely cultivated in the Khasi hills of North- Pseudechinolaena polystachya, Rottboellia East India for its grain and also as fodder. Echinochloa cochinchinensis, Sacciolepis indica, S. myosuroides, frumentacea is also cultivated in this region for preparing Schizachyrium brevifolium, Setaria intermedia, Sporobolus very potent beer. Paspalum scrobiculatum is cultivated in maderaspatanus, S. piliferus, S. spicatus, Tetrapogon South India for food. Panicum miliare also one of the tenellus, Themeda tremula and Thysanolaena latifolia. common cereal cultivated in South India. Some grasses such as Arundinella setosa var. setosa, Leptochloa The following are examples of grasses that can also be chinensis, Eragrostis tef, E. tremula, Brachiaria deflexa, used as fodder include Acrachne henrardiana, A. Cenchrus biflorus, C. prieurii, Echinochloa crus-galli, E. racemosa, Aleuropus lagopoides, Agrostis micrantha, A. stagnina, E. colonum, Dactylloctenium aegyptium, stolonifera, Apluda mutica, Apocopis mangalorensis, Hygroryza aristata, Ischaemum rugosum, Oryza rufipogon, Bothriochloa pertusa, Brachiaria ramosa, B. reptans, B. Sccciolepis interrupta, Setaria pallide-fusca and S. glauca setigera, Cenchrus pennisetiformis, C. setigerus, also rarely cultivated in different parts of the world for food Chionachne koenigii, Chloris wightiana, Chrysopogon in times of scarcity (Bor, 1960). fulvus, Coix lacryma-jobi, Dactyloctenium aegyptium, Dichanthium annulatum, Digitaria setigera, Echinochloa Saccharum officinarum (Sugarcane) is commonly crusgalli, E. frumentacea, E. picta, Eleusine indica, cultivated on large scale in different parts of India for its Enneapogon schimperanus, Eragrostiella bifaria, sugar content. It is one of the principal foods in India. Eragrostis amabilis, E. atrovirens, E. cilianensis, E. pilosa, Glyceria tonglensis, Hackelochloa granularis, Grasses used as fodder: Heteropogon contortus, Ichnanthus vicinus, Isachne miliacea, Ischaemum rugosum, I. timorense, Iseilema Grasses not only provide food for humanity, but also anthephoroides, Leersia hexandra, Leptochloa chinensis, provide nourishment in the form of cereal grains or forage L. neesii, Lolium temulentum, Manisuris myuros, for livestock and other herbivorous animals. One-third of Mnesithea laevis, Oryza rufipogon, Panicum brevifolium, Indian grasses are considered to have fodder value. Most P. miliaceum, P. paludosum, P. repens, P. sumatrense, of the grasses belong to the tribes Andropogoneae (30%), Paspalidium flavidum, Paspalum conjucatum, P. Paniceae (15%), and Eragrosteae (9%). Almost all grasses scrobiculatum, Pennisetum pedicellatum, Perotis indica, ECO-CHRONICLE 53 Phalaris minor, Poa annua, Sacciolepis curvata, S. others produce aromatic oils accumulate in tissues and interrupta, Schizachyrium exile, Sehima nervosum, S. are obtained by steam distillation. The oils are made up sulcatum, Setaria homonyma, S. italica, Sorghum spp., of a number of chemical compounds most of which are Sporobolus coromandelianus, S. humilis subsp. minor, S. pleasantly scented and for this reasons are valued in indicus var. flaccidus, S. indicus var. major, S. wallichii, perfumery trade. The oils of some species
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