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Morphometric And Allometric Study of Zonal Geranium (Pelargonium × Hortorum) Species Collected from northern Pakistan

Samina Batool¹, Tika Khan¹, Nasreen², Misbah¹, Ghaznain Ayaz¹

1.      Department of Plant Sciences, Karakoram International University, Konodas Gilgit, 15100

2.      Department of Animal Sciences, Karakoram International University, Konodas Gilgit, 15100

saminakazim22@gmail.com

Abstract: Geranium zonale (Pelargonium × hortorum), is an enormously cultivated ornamental and medicinal plant. Its ancestry stems in wild Geranium africanum found in Africa. Then, it moved to Europe and to the world in the 17th century. Its journey accumulated great morphometric variation. Now, hybridization has infused diversity across its geomorphological variegations. Study attempted to investigate climate induced variation on different parts of the plant body along altitudinal gradient. Very recently it has become part of the gardens in the northern part of Pakistan. By examining various floral and leaf traits, this research aims to elucidate the adaptive strategies employed by G. zonale in response to the unique environmental conditions prevailing in this high-altitude region. G. zonale species collected showed a great variation in coloration of flower. However, this does not show any preference of color towards altitudinal and temperature variegation. They can be found in white, pink, red and a mix of these colors. They uniquely bear 5 sepals, 9 petals, 6 stamens and 5 carpels in number. The mean area of sepals was 18.19 mm (R² = 0.0006) followed by petals with 117.51 mm (R² = 0.003), leaves 112.60 mm (R² = 0.001), stamens observed with 2.5 mm (R² = 0.005) and carpel showed nearly equal area to stamens i.e. 2.5 mm (R² = 0.005). Sepals showed negligible variation in their number and size. However, petals with no difference in number showed variation in their size. Petals and leaves showed greater response towards sunlight, temperature and altitude. An inverse relation with altitude and a direct relation with temperature and sunlight. Moreover, stamens and carpel showed no variation in their number and size. They showed the least response towards sunlight, slop, and temperature. They can be considered reliable characters in taxonomic dealings. [Samina B, Tika K, Nasreen, Misbah, Ghaznain A. Morphometric and Allometric Study of Zonal Geranium (Pelargonium × Hortorum) Species Collected from northern Pakistan. Biomedicine and Nursing 2024;10(4):1-4]. ISSN 2379-8211 (print); ISSN 2379-8203 (online). http://www.nbmedicine.org.   01. doi:10.7537/marsbnj100424.01

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