Spray-drying microencapsulation of Trichoderma harzianum conidias in carbohydrate polymers matrices

详细信息	查看全文 | 推荐本文 |

• 作者：Ana Laura Muñ ; oz-Celaya^a ; ^b ; Myriam Ortiz-Garcí ; a^a ; Eduardo Jaime Vernon-Carter^c ; Juan Jauregui-Rincó ; n^b ; Enrique Galindo^a ; Leobardo Serrano-Carreó ; n^a ; ^{leobardo@ibt.unam.mx}
• 关键词：Microencapsulation ; Biopolymers ; Biological control ; Trichoderma harzianum ; Conidia ; Activation energy
• 刊名：Carbohydrate Polymers
• 出版年：2012
• 期刊代码：14_01448617
• 类别：ch
• 出版时间：16 May, 2012
• 卷：88
• 期：4
• 页码：1141-1148
• 文件大小：930 K

摘要

Microencapsulation of biological control agents in biopolymer matrices by spray-drying is a valuable alternative to produce formulations with extended shelf-life. In this work, Trichoderma harzianum conidia were microencapsulated in: maltodextrin DE10 (MD10), maltodextrin DE20 (MD20), gum Arabic (GA), and a 1:1 weight blend of MD10-GA. The effect of spray-drying inlet and outlet air temperatures, and the activation energy (E_a) of the biopolymers on the survival of T. harzianum conidia was evaluated. The highest conidia survival after spray-drying (86%) and after 8 weeks of storage at 4 掳C (40%), were obtained with the MD10-GA biopolymer matrix (with the highest E_a = 31.6 kJ mol^鈭?). Such survivals were 11 and 330-fold times higher than those of non-encapsulated conidia, respectively. The evolution of reactive oxygen species (ROS), as a measure of oxidative stress, during storage at 29 掳C was assessed. An inverse relationship was found between the conidia survival and ROS concentration during storage.