Abstract
Selenium (Se) is considered a beneficial element in higher plants when provided at low concentrations. Recently, studies have unveiled the interactions between Se and ethylene metabolism throughout plant growth and development. However, despite the evidence that Se may provide longer shelf life in ethylene-sensitive flowers, its primary action on ethylene biosynthesis and cause-effect responses are still understated. In the present review, we discuss the likely action of Se on ethylene biosynthesis and its consequence on postharvest physiology of cut flowers. By combining Se chemical properties with a dissection of ethylene metabolism, we further highlighted both the potential use of Se solutions and their downstream responses. We believe that this report will provide the foundation for the hypothesis that Se plays a key role in the postharvest longevity of ethylene-sensitive flowers.
Highlights
Selenium (Se) is an essential nutrient for humans, bacteria, and most of the chlorophyte species (Lobanov et al, 2009; Nancharaiah and Lens, 2015)
Based on the current literature, we propose a novel model of interaction between Se metabolism and ethylene biosynthesis, which likely underlies positive consequences on postharvest life of cut flowers
We propose the action of Se on ethylene biosynthesis in a cut flower model system through selenate (Figure 1) – the main form of Se to be transported in the xylem (Asher et al, 1977; Terry et al, 2000)
Summary
Selenium (Se) is an essential nutrient for humans, bacteria, and most of the chlorophyte species (Lobanov et al, 2009; Nancharaiah and Lens, 2015). Ethylene is a plant hormone mainly known for its role in affecting leaf and flower senescence, and fruit ripening This simple gaseous molecule is involved with other elemental processes throughout the plant’s life cycle, including seed germination It was demonstrated that Se (6 mg L−1) increases the vase life of Easter Lily (Lilium longiflorum) by alleviating cell damage via the ROS scavenging system and osmotic adjustment (Lu et al, 2020). It seems that Se may have additional functions affecting the postharvest life of cut flowers that have yet to be investigated. Based on the current literature, we propose a novel model of interaction between Se metabolism and ethylene biosynthesis, which likely underlies positive consequences on postharvest life of cut flowers
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