13.03.2014 Views

Abiotic and biotic stresses and changes in the lignin ... - ResearchGate

Abiotic and biotic stresses and changes in the lignin ... - ResearchGate

Abiotic and biotic stresses and changes in the lignin ... - ResearchGate

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

32<br />

740<br />

741<br />

742<br />

743<br />

744<br />

745<br />

746<br />

747<br />

748<br />

This review showed that lign<strong>in</strong> biosyn<strong>the</strong>sis <strong>in</strong> nature can <strong>in</strong>crease complexity<br />

depend<strong>in</strong>g on <strong>the</strong> <strong>stresses</strong> <strong>and</strong> whe<strong>the</strong>r <strong>the</strong> stressor is act<strong>in</strong>g dur<strong>in</strong>g plant growth <strong>and</strong><br />

development. Unfortunately, little has been done to elucidate how such stress<strong>in</strong>g<br />

situations can change lign<strong>in</strong> content or alter its composition with regard to <strong>the</strong> build<strong>in</strong>g<br />

blocks called monolignols, or o<strong>the</strong>r phenolics enter<strong>in</strong>g <strong>the</strong> polymeric structure. Reaction<br />

wood has proven to be an important model for underst<strong>and</strong><strong>in</strong>g lign<strong>in</strong> formation <strong>in</strong> plants<br />

(Mellerowicz <strong>and</strong> Sundberg, 2008). O<strong>the</strong>r <strong>stresses</strong> may also become excellent models<br />

that will yield important clues for underst<strong>and</strong><strong>in</strong>g such complex metabolic pathways, as<br />

well as <strong>the</strong> <strong>in</strong>tricacies of genetic <strong>and</strong> metabolic control.<br />

749<br />

750<br />

751<br />

752<br />

Acknowledgments<br />

The authors (J.C.M.S.M., M.C.D. <strong>and</strong> P.M.) thank CNPq for research fellowships.<br />

Votorantim Celulose e Papel S.A. is acknowledged for f<strong>in</strong>ancial support.<br />

753<br />

754<br />

References<br />

755<br />

756<br />

757<br />

758<br />

759<br />

760<br />

761<br />

762<br />

763<br />

764<br />

765<br />

766<br />

767<br />

768<br />

769<br />

770<br />

771<br />

772<br />

Akgül M, Çöpür Y, Temiz S (2007). A comparison of kraft <strong>and</strong> kraft-sodium<br />

borohydrate brutia p<strong>in</strong>e pulps. Build<strong>in</strong>g <strong>and</strong> Environment, 42, 2586-2590.<br />

Allona I, Qu<strong>in</strong>n M, Shoop E, Swope K, St Cyr S, Carlis J, Riedl J, Retzel E,<br />

Campbell MM, Sederoff R, Whetten RW (1998). Analysis of xylem<br />

formation <strong>in</strong> p<strong>in</strong>e by cDNA sequenc<strong>in</strong>g. Proceed<strong>in</strong>gs of <strong>the</strong> National Academy<br />

of Sciences of <strong>the</strong> United States of America, 95, 9693-9698.<br />

Alvarez S, Marsh EL, Schroeder SG, Schachtman DP (2008). Metabolomic <strong>and</strong><br />

proteomic <strong>changes</strong> <strong>in</strong> <strong>the</strong> xylem sap of maize under drought. Plant Cell <strong>and</strong><br />

Environment, 31, 325-340.<br />

Andersson-Gunnerås S, Hellgren JM, Björklund S, Regan S, Moritz T, Sundberg<br />

B (2003). Asymmetric expression of a poplar ACC oxidase controls ethylene<br />

production dur<strong>in</strong>g gravitational <strong>in</strong>duction of tension wood. Plant Journal, 34,<br />

339-349.<br />

Andersson-Gunneras S, Mellerowicz EJ, Love J, Segerman B, Ohmiya Y,<br />

Cout<strong>in</strong>ho PM, Nilsson P, Henrissat B, Moritz T, Sundberg B (2006).<br />

Biosyn<strong>the</strong>sis of cellulose-enriched tension wood <strong>in</strong> Populus tremula: global<br />

analysis of transcripts <strong>and</strong> metabolites identifies biochemical <strong>and</strong> developmental

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!