Photosynthesis in Algae: Biochemical and Physiological Mechanisms. Advances in Photosynthesis and Respiration: Including Bioenergy and Related Processes, Volume 45. Edited by Anthony W. D. Larkum, Arthur R. Grossmann, and John A. Raven. Cham (Switzerland) and New York: Springer. $199.99. xxxv + 514 p.; ill.; author and subject indexes. ISBN: 978-3-030-33396-6 (hc); 978-3-030-33397-3 (eb). 2020.

2021 ◽  
Vol 96 (1) ◽  
pp. 44-45
Author(s):  
Richard M. McCourt
Keyword(s):  
New York ◽  
Physiological Mechanisms ◽  
Photosynthesis And Respiration

scholarly journals Transcriptomic Analysis of the Photosynthetic, Respiration, and Aerenchyma Adaptation Strategies in Bermudagrass (Cynodon dactylon) under Different Submergence Stress

2021 ◽  
Vol 22 (15) ◽  
pp. 7905
Author(s):  
Zhongxun Yuan ◽  
Xilu Ni ◽  
Muhammad Arif ◽  
Zhi Dong ◽  
Limiao Zhang ◽  
...  
Keyword(s):  
Carbon Fixation ◽  
Cynodon Dactylon ◽  
Chlorophyll Biosynthesis ◽  
Tca Cycle ◽  
Ethylene Signaling ◽  
Physiological Mechanisms ◽  
Cell Wall Modification ◽  
Aerenchyma Formation ◽  
Submergence Stress ◽  
Photosynthesis And Respiration

Submergence impedes photosynthesis and respiration but facilitates aerenchyma formation in bermudagrass. Still, the regulatory genes underlying these physiological responses are unclear in the literature. To identify differentially expressed genes (DEGs) related to these physiological mechanisms, we studied the expression of DEGs in aboveground and underground tissues of bermudagrass after a 7 d treatment under control (CK), shallow submergence (SS), and deep submergence (DS). Results show that compared with CK, 12276 and 12559 DEGs were identified under SS and DS, respectively. Among them, the DEGs closely related to the metabolism of chlorophyll biosynthesis, light-harvesting, protein complex, and carbon fixation were down-regulated in SS and DS. Meanwhile, a large number of DEGs involved in starch and sucrose hydrolase activities, glycolysis/gluconeogenesis, tricarboxylic acid (TCA) cycle, and oxidative phosphorylation were down-regulated in aboveground tissues of bermudagrass in SS and DS. Whereas in underground tissues of bermudagrass these DEGs were all up-regulated under SS, only beta-fructofuranosidase and α-amylase related genes were up-regulated under DS. In addition, we found that DEGs associated with ethylene signaling, Ca2+-ROS signaling, and cell wall modification were also up-regulated during aerenchyma formation in underground tissues of bermudagrass under SS and DS. These results provide the basis for further exploration of the regulatory and functional genes related to the adaptability of bermudagrass to submergence.

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