It is discovered from the leaf of the yeast fungus and the rice plant that strongly resolves life plastic.

The yeast fungus of the leaf of the rice plant efficiently resolves life Pra.

The bio-degradable plastic (life Pra) is the one that a character plastic, that is, original "Shape as it is is maintained for a long term" is used in the field that becomes a problem on the environment. Finally, it has the character to be resolved to water and carbon dioxide by the microorganism etc. with the time passage. There are a polylactic acid, a casein, and oil, etc. when made. It is used from the viewpoint that decreases an environmental load for various fields (plastic bag for shopping and BB bullet in the air gun) though it also has the weak point of the expensiveness etc. compared with plastic that cannot use for recycling etc. and is usual.

However, humidity advances from the problem of the activity condition etc. of the microorganism this life Pra and the resolution hardly advances low in winter of the low temperature. Especially, processing is not in time, and a plastic mountain will be completed in winter. When the research of the resolution promotion was advanced, the surface of the leaf of the plant is discovered to look like the structure of life Pra (fatty acid polyester structure) also in National Institute of Agro-Environmental Sciences because life Pra is multiused to the multi film for agriculture etc.

Then, when it searched for the surface of the leaf of the rice plant, the yeast fungus with high cracking ability of life Pra was found living. In short, discovery from conception with "Life Pra that the leaf (molecule) and the structure look alike might be resolved because the yeast fungus that resolves the leaf and makes to the nourishment source, too".

It is said that it turned out life Pra such as Poribtirensacshinat (PBS) and Poricaproracton (PCL) used for the multi film for agriculture etc. not only is efficiently resolved but also resoluble of this yeast fungus even in polylactic acid (PLA) that is plant origin plastic not resolved easily at the normal temperature at the normal temperature. In addition, dialytic ferment and the gene of life Pra also turned out in the yeast fungus.

It is assumed that National Institute of Agro-Environmental Sciences advances the analysis of this yeast fungus (microorganism) and the enzyme further, and it aims at the development of a new technology that efficiently resolves a used life Pra product.