摘要
Crassulacean acid metabolism(CAM)photosynthesis is an innovation of carbon concentrating mechanism that is characterized by nocturnal CO2 fixation.Recent progresses in genomics,transcriptomics,proteomics,and metabolomics of CAM species yielded new knowledge and abundant genomic resources.In this review,we will discuss the pattern of cis-elements in stomata movement-related genes and CAM CO2 fixation genes,and analyze the expression dynamic of CAM related genes in green leaf tissues.We propose that CAM photosynthesis evolved through the re-organization of existing enzymes and associated membrane transporters in central metabolism and stomatal movement-related genes,at least in part by selection of existing circadian clock cis-regulatory elements in their promoter regions.Better understanding of CAM evolution will help us to design crops that can thrive in arid or semiarid regions,which are likely to expand due to global climate change.
基金
supported by the grant 2016NZ0001-1 from the Department of Science and Technology of Fujian Province,National Natural Science Foundation of China(31701052)
Distinguished Young Scholars Fund in Fujian Agriculture and Forestry University(xjq201609)
Natural Science Foundation of Fujian Province(KJd18032A)
Program for Excellent Youth Talents in Fujian Province University.
