Variations in chlorophyll content, stomatal conductance, and photosynthesis in Setaria EMS mutants  

作　　者：TANG Chan-juan LUO Ming-zhao ZHANG Shuo JIA Guan-qing TANG Sha JIA Yan-chao ZHI Hui DIAO Xian-min 

机构地区：[1]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China

出　　处：《Journal of Integrative Agriculture》2023年第6期1618-1630,共13页农业科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (32241042 and 31771807);the National Key R&D Program of China (2021YFF1000103);the China Agricultural Research System (CARS-06-04);the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences。

摘　　要：Chlorophyll (Chl) content,especially Chl b content,and stomatal conductance (G_s) are the key factors affecting the net photosynthetic rate (P_n).Setaria italica,a diploid C_4 panicoid species with a simple genome and high transformation efficiency,has been widely accepted as a model in photosynthesis and drought-tolerance research.The current study characterized Chl content,G_s,and P_n of 48 Setaria mutants induced by ethyl methanesulfonate.A total of 24,34,and 35 mutants had significant variations in Chl content,G_s,and P_n,respectively.Correlation analysis showed a positive correlation between increased G_s and increased P_n,and a weak correlation between decreased Chl b content and decreased P_n was also found.Remarkably,two mutants behaved with significantly decreased Chl b content but increased P_n compared to Yugu 1.Seven mutants behaved with significantly decreased G_s but did not decrease P_(n )compared to Yugu 1.The current study thus identified various genetic lines,further exploration of which would be beneficial to elucidate the relationship between Chl content,G_s,and P_n and the mechanism underlying why C_4 species are efficient at photosynthesis and water saving.

关 键 词：photosynthetic capacity chlorophyll content stomatal conductance EMS mutant variation Setaria italica 

分 类 号：Q945.11[生物学—植物学]