Journal
JOURNAL OF AGRONOMY AND CROP SCIENCE
Volume 196, Issue 6, Pages 467-473Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1439-037X.2010.00432.x
Keywords
hydrogen peroxide; lignin; peroxidases; phenylalanine ammonia-lyase; salinity; soybean root
Categories
Funding
- CAPES (Brazil)
Ask authors/readers for more resources
Salt stress was evaluated on root growth, enzyme activities (phenylalanine ammonia-lyase or PAL and soluble plus cell wall-bound peroxidase or POD), hydrogen peroxide (H(2)O(2)) production, total phenolic content and lignin content and composition in soybean (Glycine max L. Merrill) roots. Three-day-old seedlings were cultivated in half-strength Hoagland's solution (pH 6.0), with or without addition of 50-200 mm of NaCl, into a growth chamber (25 degrees C, 12/12 h light/dark photoperiod, irradiance of 280 mu mol m-2 s-1) for 24 h. In general, root length and fresh and dry weights decreased after NaCl treatment. PAL activity decreased, soluble and cell wall-bound POD activities increased, and H(2)O(2) content significantly decreased after NaCl exposure. Consequently, total phenolic and lignin contents and p-hydroxyphenyl (H) and syringyl (S) monomers of lignin increased in NaCl-treated roots. Altogether, these results suggest that the effects caused by NaCl may be owing to the enhanced lignin production that solidifies the cell wall and restricts root growth.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available