Coexistence but Independent Biosynthesis of Catechyl and Guaiacyl/Syringyl Lignin Polymers in Seed Coats

Description:

Article on the coexistence but independent biosynthesis of catechyl and guaiacyl/syringyl lignin polymers in seed coats.

Creator(s):
Creation Date: July 2013
Partner(s):
UNT College of Arts and Sciences
Collection(s):
UNT Scholarly Works
Usage:
Total Uses: 9
Past 30 days: 3
Yesterday: 0
Creator (Author):
Tobimatsu, Yuki

University of Wisconsin-Madison

Creator (Author):
Chen, Fang

Samuel Roberts Noble Foundation; Oak Ridge National Laboratory

Creator (Author):
Nakashima, Jin

Samuel Roberts Noble Foundation

Creator (Author):
Escamilla-Treviño, Luis

Samuel Roberts Noble Foundation; Oak Ridge National Laboratory

Creator (Author):
Jackson, Lisa A.

Samuel Roberts Noble Foundation; Oak Ridge National Laboratory

Creator (Author):
Dixon, R. A.

University of North Texas; Samuel Roberts Noble Foundation; Oak Ridge National Laboratory

Creator (Author):
Ralph, John

University of Wisconsin-Madison; Great Lakes Bioenergy Research Center

Publisher Info:
Place of Publication: [Rockville, Maryland]
Date(s):
  • Creation: July 2013
Description:

Article on the coexistence but independent biosynthesis of catechyl and guaiacyl/syringyl lignin polymers in seed coats.

Degree:
Department: Biological Sciences
Note:

Abstract: Lignins are phenylpropanoid polymers, derived from monolignols, commonly found in terrestrial plant secondary cell walls. We recently reported evidence of an unanticipated catechyl lignin homopolymer (C lignin) derived solely from caffeyl alcohol in the seed coats of several monocot and dicot plants. We previously identified plant seeds that possessed either C lignin or traditional guaiacyl/syringyl (G/S) lignins, but not both. Here, we identified several dicot plants (Euphorbiaceae and Cleomaceae) that produce C lignin together with traditional G/S lignins in their seed coats. Solution-state NMR analyses, along with an in vitro lignin polymerization study, determined that there is, however, no copolymerization detectable (i.e., that the synthesis and polymerization of caffeyl alcohol and conventional monolignols in vivo is spatially and/or temporally separated). In particular, the deposition of G and C lignins in Cleome hassleriana seed coats is developmentally regulated during seed maturation; C lignin appears successively after G lignin within the same testa layers, concurrently with apparent loss of the functionality of O-methyltransferases, which are key enzymes for the conversion of C to G lignin precursors. This study exemplifies the flexible biosynthesis of different types of lignin polymers in plants dictated by substantial, but poorly understood, control of monomer supply by the cells.

Note:

Copyright © 2013 American Society of Plant Biologists. The following article appeared in The Plant Cell, 25:7, pp. 2587-2600, http://www.plantcell.org/content/25/7/2587.long

Physical Description:

14 p.

Language(s):
Subject(s):
Keyword(s): lignin polymers | phenylpropanoids | seed coats | biosynthesis
Source: The Plant Cell, 2013, Rockville: American Society of Plant Biologists, pp. 2587-2600
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1105/tpc.113.113142
  • ARK: ark:/67531/metadc282589
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: The Plant Cell
Volume: 25
Issue: 7
Page Start: 2587
Page End: 2600
Peer Reviewed: Yes