Journal
JOURNAL OF AGRONOMY AND CROP SCIENCE
Volume 188, Issue 4, Pages 235-247Publisher
WILEY
DOI: 10.1046/j.1439-037X.2002.00563.x
Keywords
drought; emergence percentage; emergence rate; germination percentage; germination rate; salinity; seedling growth; Vigna unguiculata
Categories
Ask authors/readers for more resources
Seeds of Paceno and Cuarenteno cultivars of cowpea (Vigna unguiculata L. Walp.) were tested for salt and drought tolerance at germination, seedling emergence and early seedling growth in NaCl and PEG-8000 solutions of different osmotic potentials (0, -0.2, -0.4, -0.6, and -0.8 MPa). Daily and final germination and emergence percentage, as well as germination and seedling emergence rate, and seedling growth were recorded under controlled conditions. Results showed that germination and emergence rate were delayed by both solutions in both cultivars, with differences between cultivars among growth stages, given that cultivar Cuarenteno, showed a higher germination rate than Paceno in NaCl, but Paceno was less affected by NaCl and PEG solutions at the emergence stage. Sodium chloride had a lesser effect on both cultivars in terms of germination rate, emergence rate and the final germination and emergence percentage than did PEG-8000. This conclusively proves that the adverse effect of PEG-8000 on germination, emergence and early seedling growth was due to the osmotic effect rather than the specific ion. Seedling growth was reduced by both stresses, but NaCl usually caused less damage than PEG to cowpea seedlings, suggesting that NaCl and PEG acted through different mechanisms.
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