Abstract
The use of pulse solutions containing antimicrobials has been reported, but more research is necessary. To increase vase life and to study their effect on opening inflorescences, silver nanoparticles were used in vase solutions for cv. PumaChrysanthemumstems. The nanoparticles were synthesized biologically usingChenopodium ambrosioidesL. applied at concentrations of 0.01, 0.05, 0.1, 0.5, 1, and 5 mM and compared with a control. Treatments were replicated five times. The stems were cut to 50 cm and observed until the end of their vase life. Low concentrations of silver nanoparticles promoted inflorescence opening and leaf yellowing, while the control leaves remained green, but there was a lower degree of inflorescence opening. High concentrations of silver nanoparticles (0.5, 1, and 5 mM) caused senescence due to low water uptake through the stems. Statistical differences in inflorescence opening and diameter, bacterial growth (CFU mL−1) in vase solutions, fresh weight, water uptake, and vase life were found among treatments. Longer vase life and less weight loss were observed in the stems exposed to low concentrations of silver nanoparticles. Low concentrations of silver nanoparticles promoted inflorescence opening and increased vase life ofChrysanthemumcv. Puma.
Highlights
Chrysanthemum (Dendranthema grandiflora Tzeleu.) is one of the most popular ornamental crops in the world [1]
The shape and size of Ag nanoparticles (AgNPs) were characterized by transmission electron microscopy (TEM Jeol 2010 operated at 200 kV)
The results showed a direct relationship between the increase in fresh weight of Chrysanthemum stems and water uptake (Figure 6)
Summary
Chrysanthemum (Dendranthema grandiflora Tzeleu.) is one of the most popular ornamental crops in the world [1] It is a member of Asteraceae family; today, it is the second most economically important flower in the world after roses [2]. Chrysanthemum is one of the most important plant species in Mexico, planted on an area of 2,564 ha with a production of 9,529,819 stems [5]. More than 30 years ago, the construction of rustic greenhouses began. They had cinder block and plastic walls. Knowledge passed down from generation to generation still predominates in areas such as the production of cuttings from mother plants and the use of handmade metal mesh for tutoring the flower stems. There is no control of postharvest stem physiology and technology, nor is there control of optimal cutting time to ensure good flower opening [6]
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