The HIC signalling pathway links CO2 perception to stomatal development.

摘要: Stomatal pores on the leaf surface control both uptake of CO2 for photosynthesis and loss water during transpiration. Since industrial revolution, decreases in stomatal numbers parallel with increases atmospheric concentration have provided evidence plant responses to changes levels caused by human activity1,2. This inverse correlation between density also holds fossil material from past 400 million years3 has clues causes global extinction events4. Here we report identification Arabidopsis gene HIC (for high carbon dioxide), which encodes a negative regulator development that responds concentration. putative 3-keto acyl coenzyme A synthase—an enzyme involved synthesis very-long-chain fatty acids5. Mutant hic plants exhibit up 42% increase response a doubling CO2. Our results identify signal transduction pathway responsible controlling at elevated