scholarly journals Role of the Extensin Superfamily in Primary Cell Wall Architecture

2011 ◽  
Vol 156 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Derek T.A. Lamport ◽  
Marcia J. Kieliszewski ◽  
Yuning Chen ◽  
Maura C. Cannon
Keyword(s):  
Cell Wall ◽  
Primary Cell ◽  
Primary Cell Wall ◽  
Cell Wall Architecture

scholarly journals The Role of the Primary Cell Wall in Plant Morphogenesis

2018 ◽  
Vol 19 (9) ◽  
pp. 2674 ◽  
Author(s):  
Derek Lamport ◽  
Li Tan ◽  
Michael Held ◽  
Marcia Kieliszewski
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Computational Modelling ◽  
Primary Cell ◽  
Arabinogalactan Protein ◽  
Primary Cell Wall ◽  
Proton Pumps ◽  
Plant Morphogenesis ◽  
Evolutionary Origins

Morphogenesis remains a riddle, wrapped in a mystery, inside an enigma. It remains a formidable problem viewed from many different perspectives of morphology, genetics, and computational modelling. We propose a biochemical reductionist approach that shows how both internal and external physical forces contribute to plant morphogenesis via mechanical stress–strain transduction from the primary cell wall tethered to the plasma membrane by a specific arabinogalactan protein (AGP). The resulting stress vector, with direction defined by Hechtian adhesion sites, has a magnitude of a few piconewtons amplified by a hypothetical Hechtian growth oscillator. This paradigm shift involves stress-activated plasma membrane Ca2+ channels and auxin-activated H+-ATPase. The proton pump dissociates periplasmic AGP-glycomodules that bind Ca2+. Thus, as the immediate source of cytosolic Ca2+, an AGP-Ca2+ capacitor directs the vectorial exocytosis of cell wall precursors and auxin efflux (PIN) proteins. In toto, these components comprise the Hechtian oscillator and also the gravisensor. Thus, interdependent auxin and Ca2+ morphogen gradients account for the predominance of AGPs. The size and location of a cell surface AGP-Ca2+ capacitor is essential to differentiation and explains AGP correlation with all stages of morphogenetic patterning from embryogenesis to root and shoot. Finally, the evolutionary origins of the Hechtian oscillator in the unicellular Chlorophycean algae reflect the ubiquitous role of chemiosmotic proton pumps that preceded DNA at the dawn of life.

scholarly journals The Role of the Primary Cell Wall in Plant Morphogenesis

2018 ◽  
Author(s):  
Derek T Lamport ◽  
Li Tan ◽  
Michael Held ◽  
Marcia J. Kieliszewski
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Computational Modelling ◽  
Primary Cell ◽  
Arabinogalactan Protein ◽  
Primary Cell Wall ◽  
Proton Pumps ◽  
Plant Morphogenesis ◽  
Evolutionary Origins

Morphogenesis remains a riddle, wrapped in a mystery, inside an enigma. It remains a formidable problem viewed from many different perspectives of morphology, genetics, and computational modelling. We propose a biochemical reductionist approach that shows how both internal and external physical forces contribute to plant morphogenesis via mechanical stress-strain transduction from the primary cell wall tethered to the plasma membrane by a specific arabinogalactan protein (AGP). The resulting stress vector with direction defined by Hechtian adhesion sites, has a magnitude of a few picoNewtons amplified by a hypothetical Hechtian growth oscillator. This paradigm shift involves stress activated plasma membrane Ca2+channels and auxin-activated H+-ATPase. The proton pump dissociates periplasmic AGP-glycomodules that bind Ca2+. Thus, as the immediate source of cytosolic Ca2+ an AGP-Ca2+ capacitor directs vectorial exocytosis of cell wall precursors and auxin efflux (PIN) proteins. In toto these components comprise the Hechtian Oscillator and also the gravisensor. Thus interdependent auxin and Ca2+ morphogen gradients account for the predominance of AGPs. The size and location of a cell surface AGP-Ca2+ capacitor is essential to differentiation and explains AGP correlation with all stages of morphogenetic patterning from embryogenesis to root and shoot. Finally, evolutionary origins of the Hechtian Oscillator in the unicellular Chlorophycean algae reflect the ubiquitous role of chemiosmotic proton pumps that preceded DNA at the dawn of life.

scholarly journals A Specialized Outer Layer of the Primary Cell Wall Joins Elongating Cotton Fibers into Tissue-Like Bundles

2009 ◽  
Vol 150 (2) ◽  
pp. 684-699 ◽  
Author(s):  
Bir Singh ◽  
Utku Avci ◽  
Sarah E. Eichler Inwood ◽  
Mark J. Grimson ◽  
Jeff Landgraf ◽  
...  
Keyword(s):  
Cell Wall ◽  
Outer Layer ◽  
Primary Cell ◽  
Primary Cell Wall ◽  
Cotton Fibers
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