Enhancement of postharvest performance in Lilium tigrinum Ker Gawl flowers with Salicylic acid: a signalling molecule and a growth regulator
Moonisah Aftab | Haris Yousuf Lone | Wajahat Waseem Tantray | Aijaz A. Wani | Mohmad Arief Zargar | Inayatullah Tahir
The postharvest longevity of Lilium tigrinum (Tiger lily) flowers is a critical factor influencing their commercial value, highlighting the need for effective strategies to extend their vase life (VL). This study evaluates the efficacy of salicylic acid (SA) at a concentration of 60 µM as a preservative for prolonging the postharvest life of L. tigrinum cut flowers. The results showed that exogenous SA application significantly extended the VL by enhancing relative water uptake, reducing microbial load, and stabilizing various biochemical parameters.SA treatment effectively inhibited lipoxygenase activity, a key enzyme involved in lipid peroxidation, thus mitigating oxidative stress. This protective effect was achieved by boosting the reactive oxygen species (ROS) scavenging capacity, evidenced by increased total phenolic content and elevated activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX). Consequently, membrane lipid peroxidation levels were significantly reduced. Furthermore, SA treatment enhances total soluble protein content, increased proline accumulation, decreased specific protease activity and maintained lower amino acid levels. These enhancements in physiological and biochemical stability can significantly enhance the economic viability of the floral industry by extending the postharvest longevity and maintaining the aesthetic integrity of cut flowers, thereby addressing the increasing global demand for superior-quality floral commodities.
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