VASE LIFE AND QUALITY OF GLADIOLUS (Gladiolus grandiflora) AS INFLUENCED BY POSTHARVEST CHEMICAL APPLICATIONS
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Date
2018-07
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AAU, Jorhat
Abstract
An investigation was carried out during October, 2016 to March, 2017 in the Department of Crop Physiology, Assam Agricultural University, Jorhat-13, to evaluate the effects of different pulsing treatments and holding solutions on vase life and quality of cut gladiolus spikes. In one experiment the cut gladiolus spikes were pulsed with different concentrations of salicylic acid (50ppm, 100ppm and 150ppm), benzyl adenine (50ppm, 100ppm and 150ppm) and nano silver (5ppm, 10ppm and 15ppm) under laboratory condition. Recorded data revealed that moisture content, fresh and dry weights of cut gladiolus spikes were positively influenced by the pulsing treatments. Amount of solution uptake, transpirational water loss and relative leaf water content recorded in cut gladiolus spikes were also altered significantly by the applied pulsing agents. Total carbohydrate content of petals, chlorophyll content of sepals, anthocyanin content of petals and vase life of cut gladiolus spikes were affected appreciably by pulsing treatments in a concentration dependent manner. Among the applied treatments, salicylic acid 150ppm was found to be the best in increasing the vase life of cut gladiolus spikes. In another experiment cut gladiolus spikes were treated with different concentrations of salicylic acid (50ppm, 100ppm and 150ppm), benzyl adenine (50ppm, 100ppm and 150ppm) and nano silver 10ppm as holding treatments under laboratory condition. Combined effects of nano silver (10ppm) with salicylic acid (50ppm, 100ppm and 150ppm) and benzyl adenine (50ppm, 100ppm and 150ppm) were also evaluated. Recorded data revealed that physiological and biochemical parameters in terms of moisture content, fresh and dry weights, amount of solution uptake, transpirational water loss, relative leaf water content, total carbohydrate content of petals, chlorophyll content of sepals, anthocyanin content of petals and vase life of cut gladiolus spikes were increased by different holding treatments. It was further observed that nano silver application significantly enhanced the efficacy of salicylic acid and benzyl adenine in increasing the vase life of cut gladiolus spikes. Among the different holding solutions, salicylic acid 150ppm + 10ppm nano silver + 4% sucrose exhibited the longest vase life (13.65 days). Results of this experiment confirmed that holding treatments exhibited better results compared to pulsing treatments in increasing the vase life of cut gladiolus spikes.