Study on foliar micro morphology of Gmelina arborea Roxb. : A clonal identification against Craspedonta leayana
Kuntala N Barua, Papori P Borpuzari and Raja Rishi
Present investigation is describes with leaf micro morphological study of Gmelina arborea clones available in Naharoni, Experimental field of Rain Forest Research Institute, Jorhat, Assam. Non glandular uniseriate multicellular filiform hairs and capitate glandular hairs were intermingled in the mesh and vein areas of the lamina. Non glandular uniseriate, 2-celled multicellular filiform hairs were dominant in majority of the clones. Dominant occurrence of anomocytic stomata in about all the clones gave the genus Gmelina as an advanced entity. Low density of trichome (30.68 ±1.90), presence of short unicellular or bi-celled glandular trichome (71.2 ±15.14), thin epidermal cell wall, hypo-stomatic leaves and low frequency of stomata leads the clone GA 006 is most susceptible to leaf defoliator insect Craspedonta leayana. Vein islet number of the clone was observed minimum and size of the areoles was large with thin wall thickness too. Otherwise, clone GA 023 comprises high density of trichome (171.52 ±3.14) with maximum length (510.88 ±62.62), polygonal- arched and thick epidermal cell wall provide the clone less susceptible to the insect.