Postharvest Physiology and Longevity of Cut Flowers

The postharvest performance of cut flowers is governed by an interplay of water relations, carbohydrate reserves, respiratory metabolism and hormonal signals. Following harvest, xylem conduits may become occluded by microbial proliferation or tyloses, impairing water uptake and precipitating wilting. Concurrently, depletion of endogenous sugars and elevated respiration can exhaust energy supplies, while ethylene production accelerates petal senescence in sensitive species. Strategies to extend vase life have therefore focused on maintaining xylem integrity, moderating ethylene action, supplying exogenous carbohydrates and bolstering antioxidant defences. Temperature management during transport and storage further influences metabolic rates and chilling susceptibility, especially in tropical ornamentals. Recent advances encompass the use of natural antimicrobial agents, nanomaterials and molecular approaches to delay senescence, as well as refined packaging and pulsing regimes that harmonise physiological needs with commercial logistics. This body of research underscores the global importance of optimising postharvest handling to reduce waste, enhance quality and support sustainable floriculture markets.

Research from Nature Portfolio

Recent studies have demonstrated that low concentrations of lemongrass essential oil can act as an eco-friendly preservative for Gladiolus grandiflorus. Treatment at 5 µL L⁻¹ in vase solution preserved vascular integrity by inhibiting microbial occlusion, as observed under electron microscopy, and maintained sugar levels and pigment content. Biochemical assays revealed reduced lipid peroxidation and enhanced activities of key antioxidant enzymes. At the molecular level, transcripts of senescence-associated genes were downregulated while those encoding antioxidant proteins were upregulated, collectively extending vase life by several days and improving fresh weight and flower diameter.

Postharvest Physiology and Longevity of Cut Flowers publication trend

The graph below shows the total number of articles in postharvest physiology and longevity of cut flowers across all publications each year (not limited to Nature Index journals).

Technical terms

Vase life: The duration between harvest and visible senescence of a cut flower.

Xylem occlusion: Blockage of water-conducting vessels by microbial biofilms or plant tyloses.

Ethylene sensitivity: The degree to which a flower’s tissues respond to ethylene by accelerating senescence.

Antioxidant enzymes: Proteins such as peroxidases and superoxide dismutase that scavenge reactive oxygen species.

Reactive oxygen species (ROS): Highly reactive molecules (e.g. H₂O₂) that can damage cell membranes and accelerate senescence.

Pulsing: A short-term treatment of cut stems in concentrated solutions (e.g. sucrose, biocides) to preload nutrients or inhibitors.

References

1. Postharvest physiology of cut flowers. Ornamental Horticulture (2021).
2. Lemon grass essential oil improves Gladiolus grandiflorus postharvest life by modulating water relations, microbial growth, biochemical activity, and gene expression. Scientific Reports (2023).
3. Review of recent advances in post-harvest techniques for tropical cut flowers and future prospects: Heliconia as a case-study. Frontiers in Plant Science (2023).
4. The Role of Water Relations and Oxidative Stress in the Vase Life Response to Prolonged Storage: A Case Study in Chrysanthemum. Agriculture (2022).
5. Carbon nanotubes in the holding solution stimulate flower opening and prolong vase life in carnation. Chemical and Biological Technologies in Agriculture (2022).