Effect of hinokitiol impregnated sheets on shelf life and quality of “KEK‐1” tomatoes during storage.

Hinokitiol (β‐thujaplicin, volatile oil extracted from the wood of Hiba arborvitae
[Thujopsis dolabrata var. hondae], cypress family) is a natural preservative, antimicrobial, and chelating agent, used to prevent decay and extend the shelf life of fruits and
vegetables. In the present study, we used nonwoven rayon sheets impregnated with
hinokitiol to conduct packaging studies. Mature green tomatoes var. “KEK‐1” were
packaged under three packaging conditions, ie, modified atmosphere packaging
(MAP), MAP + hinokitiol (MH), and perforated film package (as control), and their
quality attributes were compared during storage. The packaging materials used were
low‐density polyethylene (LDPE) film (40 μm) and fresh sheets of nonwoven rayon
impregnated with hinokitiol. O2 in the MAP packaged tomatoes were retained
throughout the storage period (3% to 5% O2). Results showed that MH had slightly
improved quality attributes throughout the storage period when compared with
MAP alone. Expression levels of LeACS, LeADH, and LeTBG4 genes were higher in 5
and 9 days of control when compared with MAP and MH. “KEK‐1” tomatoes had longer shelf life under MAP and MH packaging and maintained the quality at 15°C.
Hence, the effect of the MAP with bioactive packaging treatments could be effective
in the future application for the extension of shelf life and quality of fruits and
vegetables.