Strategy and tactics of disarming GHG at the source: N2O reductase crops

Trends in Biotechnology
Shen WanIllimar Altosaar

Abstract

Nitrous oxide (N(2)O), the third most abundant greenhouse gas (GHG), is highly stable and plays a significant role in stratospheric ozone destruction. The primary anthropogenic source of N(2)O stems from use of nitrogen fertilizers in soil. The bacterial enzyme nitrous oxide reductase (N(2)OR), naturally found in some soils, is the only known enzyme capable of catalyzing the final step of the denitrification pathway, conversion of N(2)O to N(2). In this opinion, we discuss potential biology-based strategies to reduce N(2)O by amplifying the amount of available enzyme catalyst in agri-system environments during crop growth and in post-harvest detritus. N(2)OR from Pseudomonas stutzeri has been tested in transgenic plants with promising results. Such seed-borne phytoremediation systems targeted towards GHGs merit field testing.

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Citations

Feb 18, 2020·Journal of Environmental Management·Muhammad AamerZhang Peng

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