Suppression of Malformed Petals in Cut Rose ‘Yves Piaget’ Flowers Caused by Pulse-Uptake Treatment of Methyl Jasmonate

The most popular fragrant cut rose cultivar in Japan is ‘Yves Piaget’, but its petals often become malformed after harvest. These flowers, referred to as “incurved flowers”, are characterized by curving toward the adaxial side which prevents normal flowering and significantly decreases flower quality. It has been reported that jasmonic acid (JA) affects petal growth, could suppress emergence of incurved flowers. Therefore, this study, we investigated use exogenous JA, methyl jasmonate (MeJA), applied flowers Piaget’ 24 h pulse-uptake treatment. Results showed 500 μM MeJA treatment was effective at suppressing number petals. Then, salicylic (SA), an antagonist see if increased. We compared three treatments: deionized water uptake (control), treatment, SA continuous-uptake Vase life did not differ between treatments, produced a better-preserved shape due only slight bluing discoloration. In contrast, control treatments with major wilting, bluing, tended extend days from bud full bloom decrease continued high-water absorption. commercial value roses lies blooming process until bloom; increased improved there less absorption more indicating antagonistic response conclusion, improve