CERIOPS TAGAL (PERS.) C.B. ROBINSON IN PAKISTAN: SAPLING GROWTH AND SAPLING LEAF ARCHITECTURE AND SURFACE MICROMORPHOLOGY
Keywords:Ceriops tagal (Pers.) C.B. Robin, Sapling growth, Leaf morphometry, Architecture and surface micromorphology
Some observations on sapling growth in tidal marsh and macro- and micromorphology of sapling leaves of a true mangrove species, Ceriops tagal (Pers.) C.B. Robin, grown in a coastal nursery by planting propagules in tidal marsh of Shah Bunder, Indus delta, are described. Growth included such parameters as net growth (between top of propagule to the end of shoot), number of leaves per sapling, number of internodes in new growth, and photosynthetic area of the sapling. There were sclereids in the cortical cells below midrib VB. In addition to the internal structure of leaves, the morphometric and architectural parameters such as leaf length (LL) and breadth (LB), leaf area measured graphically (LAM), apex and basal angles and aspect ratio (LB / LL) were determined. Lamina area was determined arithmetically using multiplying coefficient K (determined for this species to be 0.7600) for equation, Leaf area = K (LL x LB) and also statistically by developing regression equations for simple (linear and power models) and multiple correlation and regression. Surface micromorphological studies were undertaken with respect to the stomatal types, their density and occurrence of cork warts. On the basis of Dilcher’s (1974) stomatal classificatory scheme, cyclocytic arrangement of distinct subsidiaries was mainly recorded. Subsidiaries were raised forming of ring around the guard cells (sunken stomata) and sloping down to the guard cells. Some stomata were provided with indistinct subsidiaries (anomocytic) radiating from the guard cells and surrounded with normal cyclocytic stomata all around. Anticlinal walls of epidermal cells were straight to somewhat curvy. Stomatal density averaged to 110.95 ± 1.104 stomata per mm2 for 160 observations in three leaves. The mean stomatal size measured in two leaves averaged to 35.78 ± 0.51 x 19.62 ± 0.3448 μm and 40.03 ± 0.7372 x 20.0 ± 0.3373 μm in two separate leaves, respectively. The results were discussed with respect to the available literature.
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