Senescence is the major physiological process that influence the quality of cut flowers. Among cut flowers, gladiolus known for its glamour, perfection and colorful spikes occupies leading position in Indian as well as international markets. Thus, in the present investigation, evaluation of sodium nitroprusside (nitric oxide, NO donor) as holding solution on biochemical and physiological parameters affecting postharvest life of gladiolus spikes (varieties: Punjab Glad-1 and Punjab Glad-2) was done. Gladiolus spikes harvested at tight bud stage were kept in different solutions viz. 50, 100, 150, 200 mg L⁻¹ sodium nitroprusside (SNP); 2% sucrose and 400 mg L⁻¹ aluminium sulphate; water as control. The holding solution of 100 mg L⁻¹ SNP extended the vase life of Punjab Glad-1 from 7 days in control to 13 days and Punjab Glad-2 from 6 days in control to 11 days. The results revealed that holding solution @SNP 100 mg L⁻¹ improved membrane stability index and relative water content, increased total soluble sugars, total soluble proteins, catalase and peroxidase activity during floret development more in Punjab Glad-1 than Punjab Glad-2 that enhanced the number of floret opened at one time, percent floret opened, floret size, solution absorbed and ultimately vase life. Thus, 100 mg L⁻¹ SNP as a holding solution could improve the postharvest quality of gladiolus spikes by influencing biochemical and physiological attributes.

衰老是影响切花品质的主要生理过程。在切花中，唐菖蒲以其魅力、完美和多彩的穗状花序在印度和国际市场上占据领先地位。因此，在本研究中，对硝普钠（一氧化氮，NO 供体）作为影响唐菖蒲穗（品种：Punjab Glad-1 和 Punjab Glad-2）采后寿命的生化和生理参数的保存溶液进行了评估。在紧芽阶段收获的唐菖蒲穗保存在不同的溶液中，即。50, 100, 150, 200 mg L ^-1硝普钠 (SNP)；2% 蔗糖和 400 mg L ^-1硫酸铝；水作为对照。100 mg L ^-1的保持液SNP 将 Punjab Glad-1 的花瓶寿命从控制的 7 天延长至 13 天，将旁遮普的 Glad-2 的花瓶寿命从控制的 6 天延长至 11 天。结果表明，在Punjab Glad-1中，与Punjab Glad-2相比，保持溶液@SNP 100 mg L ^-1提高了膜稳定性指数和相对含水量，增加了小花发育过程中的总可溶性糖、总可溶性蛋白、过氧化氢酶和过氧化物酶活性。提高了一次打开的小花数量、小花打开的百分比、小花大小、溶液吸收和最终的花瓶寿命。因此，100 mg L ^-1 SNP 作为保存溶液可以通过影响生化和生理属性来改善唐菖蒲穗的采后质量。