Changes in postharvest physio-biochemical characterustics and antioxidant enzymes activity of cut alsteroemeria aurantiaca flower as affected by cycloheximide, coconut water and 6-benzyladenine

Abstract

Early leaf yellowing in cut alstroemeria (Alstroemeria aurantiaca) flowers before flower development and petal abscission is an important limiting postharvest quality and vase life factors. Early leaf senescence reduces postharvest longevity of cut flowers and promotes petal's wilting. A study was made to evaluate the response of cut alstroemeria flowers at varying concentrations of cycloheximide (CHI) (50, 100 and 200 mg l -1 ), coconut water (5, 10 and 20%) and 6-benzyladenine (BA) (50, 100 and 200 mg l -1 ). CHI, coconut water and BA extended the vase life at all concentrations compared to the control, but coconut water at 5% concentration (with 17.39 days) was the most effective treatment. Control cut flowers showed the least vase life (10.76 days). Ethylene production in cut flowers promoted flower senescence. All concentrations of CHI, coconut water and BA delayed ethylene production compared to the control. Treatment of cut flowers with coconut water at concentration of 5% maintained the highest fresh weight of flowers and increased the content of water uptake. The chlorophyll degradation was significantly reduced by the application of CHI, coconut water and BA. The maximum content of membrane's lipid peroxidation and antioxidant enzymes activity (super oxide dismutase and peroxidase) was obtained in control cut flowers. Thus, 5% fresh coconut water has the potential to be applied as vase solution (preservative medium) due to prolongs of cut alstroemeria flowers.

Combined effects of NPK fertilizer with foliar application of benzyladenine or gibberellic acid on Dracaena marginata ‘Bicolor’ grown in different potting media

“…Concerning Cytokinins are a large group of plant hormones which play a pivotal role as active molecules in many physiological processes of plant growth and development. Benzyl adenine (BA) had been newly used to maintain or increase the quality of different ornamental plants (Askari-Khorasgani and Mortazaeinezhad 2016; Matak et al, 2017), Moreover, its ability to increase number of chloroplasts, chlorophyll synthesis, bud differentiation and branching had been reported (Kochhar and Sukhbir, 2020). It was reported that its application induced vegetative growth, photosynthesis rate, soluble sugars, indoles, soluble phenols and the contents of N, P and K in organs of croton plants (Ibrahim et al, 2010).…”

Effect of blue light and nanosilver on vase life, antioxidant enzymes and some other physiologic parameters of Alstroemeria ‘Napoli’ cut flowers

“…To measure the ethylene produced by the cut alstroemeria flowers, 24 h after the treatments, one flower was selected from each plot and was vacuumed in specific jars. After 24 h, the ethylene gas produced in the jars was sampled, and its ethylene content was measured with a gas chromatography instrument (Shimadzu GC-2014, Japan) and reported in nl l −1 g −1 FW [Alizadeh Matak et al 2017].…”

Exploring Plants with Flowers: From Therapeutic Nutritional Benefits to Innovative Sustainable Uses

“…Flower: 4.5 to 4.9 µg total carotenoids/g DW (SM) [30]; 30 µg/g DW, individual carotenoids (RRLC) [366]; 536.6 µg/g β-carotene total carotenoids (SM) [214] Flower: 3 mg GAE/g total phenolics (SM) [214] Amaranthaceae Celosia argentea L.…”

“…Acanthaceae Aphelandra squarrosa Nees Flower: 381.3 µg/g DW, individual carotenoids (RRLC) [366] Root: 3.5 µmol Benzoxazinoid/g FW)/(HPLC) [22] Acanthaceae Justicia aurea Schltdl. Flower: 47.9 µg violaxanthin/g DW (RRLC) [366] na Alstroemeriaceae Alstroemeria aurea Graham Flower: 4.5 to 4.9 µg total carotenoids/g DW (SM) [30]; 30 µg/g DW, individual carotenoids (RRLC) [366]; 536.6 µg/g β-carotene total carotenoids (SM) [214] Flower: 3 mg GAE/g total phenolics (SM) [214] Amaranthaceae Celosia argentea L.…”