Response of Roses (Rosa hybrida L. ‘Herbert Stevens’) to Foliar Application of Polyamines on Root Development, Flowering, Photosynthetic Pigments, Antioxidant Enzymes Activity and NPK

Abstract

The effect of foliar application of polyamines on roses (Rosa hybrida cv. ‘Herbert Stevens’) was investigated in a factorial experiment based on a completely randomized design with three replications in a greenhouse. Two factors were applied including polyamine type (putrescine, spermidine, and spermine) and polyamine concentration (0, 1, 2 and 4 mM). The recorded traits included root fresh and dry weight, root length, number of flowers, flower longevity, chlorophyll content, carotenoids, antioxidant enzymes activity (catalase, ascorbate peroxidase and guaiacol peroxidase) and some macronutrients such as nitrogen, phosphorus and potassium. The results showed that among polyamines, putrescine had the greatest effect on root dry weight; spermidine showed the greatest effect on root length, chlorophyll content, plant phosphorus and spermine affected root fresh weight and flower longevity most strongly. Polyamine concentration of 1 mM had the strongest effect on flower longevity, carotenoids, nitrogen and phosphorus content. The highest potassium rate was observed in treatments with the concentration of 4 mM. Polyamine treatments had no significant effect on the number of flowers per plant and antioxidant enzymes.

Foliar Application of Polyamines Modulates Winter Oilseed Rape Responses to Increasing Cold

“…Several studies have shown that the accumulation of ethylene can be influenced by plant resistance increasing substances [10,46]. Additionally, ethylene production in fruits has previously been shown to be inhibited by applications of PAs and having controversial effects on a number of physiological processes [46,47]. There is increasing evidence that PAs, whether applied exogenously, can positively affect plant growth, productivity, and heat as well drought stress tolerance [37], but there is no data on how they can affect ethylene emission in cold and freezing conditions.…”

“…Each group consisted of 24 pots with 9 plants in each pot. PA concentration used in this study was chosen based on the other studies [47]. Three groups were…”

“…Each group consisted of 24 pots with 9 plants in each pot. PA concentration used in this study was chosen based on the other studies [47]. Three groups were foliarly treated with 1 mM water solutions of different types of PAs, namely Spd, Spm, and Put (Sigma).…”

“…There is some evidence that PAs can inhibit ethylene biosynthesis in plants, and the relationship between PAs and ethylene seems to be dependent on the plant species [37,46,47]. Under stress conditions, ethylene causes growth inhibition, regulates defense processes, mostly in full-grown leaves, and growth in young leaves.…”

Eco‐friendly biomolecule‐nanomaterial hybrids as next‐generation agrochemicals for topical delivery

“…47 The applications of various metabolites such as lactic acid, amino acids, and polyamines have been studied and reported thoroughly through the era of "green revolution" in the development of agricultural biotechnology due to their promotion to the plant growth. [48][49][50][51][52] It is worth mentioning that plant hormones and their analogues have also been widely used for growth regulation as either fertilizers or herbicides. [53][54][55][56][57][58][59][60][61][62][63] Nucleic acids and proteins can be regarded as metabolites as well, though they are usually studied individually due to their significance to plant metabolism.…”