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Similarly, leaf pigment content (SCMR values) also exhibited significant intergenotypic differences, ranging from 35.23 (Mysore local) to 42.13 (V1) and correlating positively with chlorophyllous palisade tissue in the mesophyll and photosynthetic rates. Ultimately, this manifested in leaf yields. | Research Article Turk J Bot 36 (2012) 683-689 © TÜBİTAK doi:10.3906/bot-1003-48 Leaf and anatomical traits in relation to physiological characteristics in mulberry (Morus sp.) cultivars 1 2 Vineet KUMAR1,*, Javuli KODANDARAMAIAH2, Mala Vati RAJAN2 Electron Microscopy Division, Central Sericultural Research and Training Institute, Srirampura, Mysore 570008 - INDIA Mulberry Physiology Laboratory, Central Sericultural Research and Training Institute, Srirampura, Mysore 570008 - INDIA Received: 24.04.2010 ● Accepted: 26.04.2012 Abstract: Micromorphological and anatomical traits in relation to physiological characteristics were studied in the leaves of 4 mulberry (Morus sp.) cultivars (V1, TR10, S34, and Mysore local) by scanning electron microscope. The results revealed that leaf thickness was lowest (124.42 ± 2.21 µm) in the TR10 genotype and highest in V1 (263.77 ± 5.17 µm). Cultivar S34 ranked second in respect to leaf thickness (203.57 ± 1.98 µm), followed by Mysore local (127.94 ± 2.19 µm). The thickness of palisade parenchyma was 143.66 ± 2.42 µm in V1, 64.95 ± 1.60 µm in TR10, 83.92 ± 1.43 µm in S34, and 62.69 ± 1.36 µm in Mysore local. The ratio for the character of palisade parenchyma thickness among the cultivars was 2.30:1.34:1.04:1 for V1, S34, TR10, and Mysore local, respectively; differences among the 4 mulberry cultivars studied were significant. The thickness of spongy parenchyma differed significantly among the 4 mulberry cultivars studied, and the greatest thickness recorded was 72.61 ± 1.48 µm in S34; it was lowest (34.04 ± 1.03 µm) in TR10. The values of spongy parenchyma thickness were more than double in V1 and S34 when compared to TR10. The experimental data revealed a maximum photosynthetic rate of 27.39 ± 0.65 µmol m−2 s−1 in V1 followed by 24.66 ± 1.33, 19.76 ± 0.81, and 17.02 ± 0.71 µmol m−2 s−1 in TR10, S34, and Mysore local, respectively, and differences among the genotypes were statistically significant. Similarly, leaf pigment .
