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Cellular damage during drying and storage of Trichoderma harzianum spores

Paper ID Volume ID Publish Year Pages File Format Full-Text
34919 45060 2012 9 PDF Available
Title
Cellular damage during drying and storage of Trichoderma harzianum spores
Abstract

Factors that cause cellular damage during the drying and storage of Trichoderma harzianum conidia were independently studied to determine their effects on spore viability. Specifically, thermal stress and dehydration levels (water activity, aw = 0.1–0.7) were assessed for their effect on spore survival. In addition, environmental conditions, such as water activity and temperature, were evaluated during storage of the spores. T. harzianum spores produced in liquid culture are highly sensitive to thermal stress, but dehydration does not seem to be a factor that influences spore death during desiccation. An inverse correlation between spore survival and the specific concentration of malondialdehyde (MDA) was observed during storage, especially when the conidia moisture levels were lower than the monolayer moisture levels. We prepared spore suspensions without additives and spray-dried the samples. Our data showed that reduced sample viability was mainly caused by the temperature of the drying process, an effect that appears to be independent of water activity.

Keywords
Spray drying; Spore survival; Trichoderma; Storage
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Cellular damage during drying and storage of Trichoderma harzianum spores
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 47, Issue 2, February 2012, Pages 186–194
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us