Sumitomo Rubber Industries has announced the conclusion of an agreement with Khon Kaen University, a national university of Thailand, about joint research on a rubber tree tissue culture technique.

The research aims to elucidate the mechanism that leads to yield improvement by analysing data on the plant physiological response of rubber trees. Through this research, it aims to accelerate its initiatives for sustainable natural rubber procurement.

In line with the Sustainable Natural Rubber Policy, which was updated in August 2021, it aims to actively make collaborative efforts with stakeholders in the supply chain to achieve the sustainable procurement of natural rubber.

Although grafting is generally used to propagate rubber tree seedlings at present, it is significantly affected by the stock in terms of growth, disease resistance, and other aspects. Meanwhile, in a tissue culture technique, which Sumitomo Rubber Industries is working to establish, a part of the tissue of a rubber tree is isolated to be cultured in a test tube and the root and the stem are in the same plant body; this is considered beneficial for growth. The company says it has been confirmed that the seedlings deriving from tissue culture grow faster than the seedlings deriving from general grafting in the early stage of planting (one to two years).

This joint research with Khon Kaen University aimed at investigating the mechanism that leads to yield improvement by examining the growth and leaf shapes of rubber tree seedlings deriving from tissue culture and those deriving from grafting, obtaining data on plant physiological responses chiefly through the measurement of transpiration, and evaluating the differences.

Another activity is receiving internships from Khon Kaen University within the framework of this joint research. In the future, Sumitomo Rubber Industries wants to contribute to not only improving rubber tree productivity but also developing human resources in Thailand.

The company says it will implement initiatives to enhance the sustainability of natural rubber from two perspectives: productivity improvement and odour improvement. For the productivity improvement, various research projects are ongoing that will lead to the promotion of rubber tree growth and the improvement of tapping productivity, while for the odour improvement, it has successfully developed ‘natural rubber with reduced odour.’

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