Plant tissue packaging process
A method is provided for packaging harvested plant tissues, such as agricultural products. Embodiments of the present invention mitigate damage to harvested plant tissues due to excessive ripening and spoilage, by contacting the plant tissues with ozone during transportation and storage. For example, in some embodiments harvested plant tissues are placed in substantially closed modified atmosphere packages, and the packages are surrounded by an atmosphere containing ozone. In alternative embodiments, the packaging may be perforated, and the packages placed in a controlled atmosphere that contains ozone. Harvested plant tissues may be treated with ozone before packaging further to promote their freshness. The present invention thus increases the longevity and value of harvested plant tissues beyond the abilities of currently available packaging methods.
1 . A method for preserving harvested plant tissues, the method comprising:
placing the plant tissues in a package; and
surrounding the package with an atmosphere containing ozone.
2 . The method of claim 1 , further comprising refrigerating the packaged plant tissues.
3 . The method of claim 1 , further comprising exposing the plant tissues to ozone before placing the plant tissues in a package.
4 . The method of claim 2 , wherein the package is made of a modified atmosphere packaging material.
5 . The method of claim 4 , wherein the concentration of ozone is in the range of approximately ten parts per billion volumes to approximately ten parts per million volumes.
6 . The method of claim 5 , further comprising placing the packaged plant tissues within a ship hold.
7 . The method of claim 5 , further comprising placing the packaged plant tissues within a shipping container or storage room.
8 . The method of claim 6 , wherein the plant tissues are fruits or vegetables.
9 . A method for preserving harvested plant tissues, the method comprising placing the plant tissues in a package; and surrounding the package with an atmosphere containing ozone, wherein the package is made of a modified atmosphere packaging material.
10 . The method of claim 9 , wherein the package is a substantially closed polyethylene bag.
11 . The method of claim 10 , further comprising refrigerating the packaged plant tissues.
12 . The method of claim 11 , further comprising placing the packaged plant tissues within a shipping container or storage room.
13 . The method of claim 12 , wherein the plant tissues are fruits or vegetables.
14 . The method of claim 13 , further comprising exposing the plant tissues to ozone before placing the plant tissues in a package.
15 . A method for preserving harvested plant tissues, the method comprising placing the plant tissues in a package; and surrounding the package with an atmosphere containing ozone, wherein the atmosphere is a controlled atmosphere.
16 . The method of claim 15 , wherein the gas concentration that is controlled in the atmosphere comprises that of oxygen.
17 . The method of claim 16 , wherein the concentration of ozone is in the range of approximately ten parts per billion volumes to approximately ten parts per million volumes.
18 . The method of claim 17 , wherein the package is perforated.
19 . The method of claim 18 , further comprising refrigerating the packaged plant tissues.
20 . The method of claim 19 , further comprising exposing the plant tissues to ozone before placing the plant tissues in a package.