Growth and Physiological Responses of Phaseolus Species to Salinity Stress
Joint Authors
Jasso-Plata, N.
Ochoa, I.
Bayuelo-Jiménez, J. S.
Source
International Journal of Agronomy
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-20
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
This paper reports the changes on growth, photosynthesis, water relations, soluble carbohydrate, and ion accumulation, for two salt-tolerant and two salt-sensitive Phaseolus species grown under increasing salinity (0, 60 and 90 mM NaCl).
After 20 days exposure to salt, biomass was reduced in all species to a similar extent (about 56%), with the effect of salinity on relative growth rate (RGR) confined largely to the first week.
RGR of salt-tolerant species was reduced by salinity due to leaf area ratio (LAR) reduction rather than a decline in photosynthetic capacity, whereas unit leaf rate and LAR were the key factors in determining RGR on salt-sensitive species.
Photosynthetic rate and stomatal conductance decreased gradually with salinity, showing significant reductions only in salt-sensitive species at the highest salt level.
There was little difference between species in the effect of salinity on water relations, as indicated by their positive turgor.
Osmotic adjustment occurred in all species and depended on higher K+, Na+, and Cl− accumulation.
Despite some changes in soluble carbohydrate accumulation induced by salt stress, no consistent contributions in osmotic adjustment could be found in this study.
Therefore, we suggest that tolerance to salt stress is largely unrelated to carbohydrate accumulation in Phaseolus species.
American Psychological Association (APA)
Bayuelo-Jiménez, J. S.& Jasso-Plata, N.& Ochoa, I.. 2012. Growth and Physiological Responses of Phaseolus Species to Salinity Stress. International Journal of Agronomy،Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-478827
Modern Language Association (MLA)
Bayuelo-Jiménez, J. S.…[et al.]. Growth and Physiological Responses of Phaseolus Species to Salinity Stress. International Journal of Agronomy No. 2012 (2012), pp.1-13.
https://search.emarefa.net/detail/BIM-478827
American Medical Association (AMA)
Bayuelo-Jiménez, J. S.& Jasso-Plata, N.& Ochoa, I.. Growth and Physiological Responses of Phaseolus Species to Salinity Stress. International Journal of Agronomy. 2012. Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-478827
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-478827