Salicylic Acid and Cold Storage in the Post-Harvest of Bird-of-Paradise | Chapter 13 | Advances and Trends in Agricultural Sciences Vol. 4

The irregular opening of the florets and susceptibility to chilling damages are the major issues of cut Bird-of-Paradise flowers (Strelitzia reginae). The salicylic acid (SA) has shown to be a promising action in reducing chilling injury in many crops; however, its effect is not well elucidated in cut flowers. The objective of this study was to determine the action of SA on the development of reduction of hilling injury during storage of Bird-of-Paradise flowers. The stems were pulsed with 200 g L-1 of sucrose in added with three concentrations of SA (2, 4 and 6 mmol L-1) and control with only 200 g L-1 of sucrose for 24 hours. Subsequently, the stems were transferred to containers with water and conditioned at 5°C for chilling injury induction for 28 days. Water uptake rate, transpiration rate, fresh mass, electrolyte leakage, activity of peroxidase and phenolic compounds of bracts and sepals were determined weekly. The SA reduces the transpiration rate and keeps the mass fresh until 21 days. A reduction was observed in electrolyte leakage up to 14 days. All doses of SA increased POD activity of the bracts while water uptake rate, POD activity of the sepals and phenolic compound content of bracts and sepals are dependent on dose and storage period. It is concluded that the SA applied via pulsing reduces the chilling injury on Bird-of-Paradise cut flowers. In addition, it reduces the transpiration rate and maintains the fresh mass of the floral stems until 21 days. No correlation was found between POD activity and phenolic compounds.

Author (s) Details

Ariana Mota Pereira
Centro de Ciências Agrárias, Universidade Federal de Viçosa, Av. PH Holfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil.

Mateus de Paula Gomes
Centro de Ciências Agrárias, Universidade Federal de Viçosa, Av. PH Holfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil.

Renata Ranielly Pedroza Cruz
Centro de Ciências Agrárias, Universidade Federal de Viçosa, Av. PH Holfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil

Ana Izabella Freire
 Centro de Ciências Agrárias, Universidade Federal de Viçosa, Av. PH Holfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil.

View Book: - http://bp.bookpi.org/index.php/bpi/catalog/book/168

Use of Plant Hormones on Postharvest Physiology of Bird of Paradise | Chapter 11 | Advances and Trends in Agricultural Sciences Vol. 4

Bird of Paradise (Strelitzia reginae Banks) has great market potential due to its intrinsic beauty and longer vase life. However, storage and transportation conditions are not always adequate and may lead to negative consequences on postharvest physiology and the quality of these flowers. Thus, this study determined the effect of pulsing treatment containing methyl jasmonate (MeJA) or salicylic acid (SA) in association with sucrose on the postharvest physiology of Bird of Paradise. Two           independent experiments were carried out. In the first one, floral stems were treated with 100, 250 and 400 μmol L-1 of MeJA plus 200 g L-1 of sucrose for 24 h. In the second experiment, the treatments consisted of 2, 4 and 6 mmol L-1 of SA in association with 200 g L-1 sucrose for 24 h. After the pulsing treatment, the floral stems of both experiments were kept in containers with water at room temperature. The analyses were performed on days 0 and 7 and the assessment comprised: Water uptake rate, transpiration rate, fresh mass loss, electrolyte leakage, peroxidase activity (POD) and phenolic compounds of the bracts and sepals. MeJA and SA reduced the water uptake rate by the stems. SA reduced transpiration rate, loss of fresh mass and phenolic compounds of sepals on day 0. On day 7, MeJA treatment reduced electrolyte leakage and increased POD activity. Otherwise, SA had no effect on electrolyte leakage and reduced POD activity. These results suggest that MeJA and AS act antagonistically on the electrolyte leakage and POD activity which might promote different effects on the postharvest physiology of Bird of Paradise stems, such as adverse patterns of the transpiration rate.

Author (s) Details

Ariana Mota Pereira
Departamento de Fitotecnia, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil

Mateus de Paula Gomes
Departamento de Fitotecnia, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil

Maria Eduarda da Silva Guimarães
Departamento de Fitotecnia, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil.

Dreice Nascimento Gonçalves
Departamento de Fitotecnia, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil.

Fernando Luiz Finger
Departamento de Fitotecnia, Universidade Federal de Viçosa, Av. PH Rolfs s/n, Campus Universitário, CEP 36570-900 Viçosa/MG, Brasil

View Book: - http://bp.bookpi.org/index.php/bpi/catalog/book/168