Influence of Plant Growth Regulators by Foliar Application on Vegetative and Floral physiognomies of Gladiolus
Shahid Nadeem1*, Taj Naseeb Khan1, Mushtaq Ahmad1, Adnan Younis2 and Iram Fatima3
Gladiolus grasps an exceptional position among ornamental plants due to its captivating spikes, with plane ruffle and deeply crinkled sepals, and it mainly used as cut flower and greatly demanded in floral markets. In order to achieve the maximum outcomes for the purchaser or community, a comprehensive study was conducted on gladiolus to enhance its vegetative and floral characteristics with the foliar application of growth hormones i.e. gibberellic acid (GA3) and salicylic acid (SA). The results revealed that the application of GA3 and SA had significant influence on vegetative as well as floral traits of gladiolus. The maximum numbers of days (7.90) for the sprouting of gladiolus corms were counted with 1mM of SA similarly maximum plant height (93.60cm) and maximum numbers of leaves (9.86) were observed by 1.75mM SA. The relationship between plant’s vegetative phase and growth regulators stood noteworthy resulted in maximum leaf length (71.14cm), rachis length (57.33cm) and spike length (77.67cm) at 1.75mM concentration of GA3. The Effect of SA found worthy as it enhanced the floral growth and decrease the number of days towards blooming. Moreover, the days to spike emergence, days to bud color and days to floret open were decreased (96.47, 101.20 and 105.77 respectively) with 1.75mM salicylic acid. However, the results showed the positive impact of GA3 and SA on vegetative as well as floral physiognomies of gladiolus plants.