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Pakistan Journal of Biological Sciences
  Year: 2006 | Volume: 9 | Issue: 15 | Page No.: 2812-2817
DOI: 10.3923/pjbs.2006.2812.2817
 
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Effect of Iso-Osmotic Salt and Water Stress on Germination and Seedling Growth of Two Plantago species

A. Rahimi, M.R. Jahansoz , H.R. Rahimian Mashhadi , K. Postini and F. Sharifzade

Abstract:
General responses to drought and salt stress was investigated in two Plantago species including Plantago ovata and P. psyllium. Seeds were treated with aqueous solutions of 0, -0.2, -0.4, -0.6 and -0.8 Mpa NaCl and iso-osmotic concentration of polyethylene glycol 8000. NaCl of -0.6 and -0.8 Mpa caused more delay in germination than the iso-osmotic solution of PEG. However, germination frequency was strongly affected by drought and salinity stress, such that only 20% of the P. ovata and 30% P. psyllium seeds germinated in -0.6 Mpa Osmotic Potential (OP) during the first week of incubation. The rate of germination was decreased with an increase in osmotic potential in both drought and salinity stress, however drought had much effect on the rate of germination. All treatment of NaCl and PEG were inhibitory to root and shoot elongation of seedlings in both species relative to the distilled water controls; however, NaCl affected seedling root and shoot elongation more severely specially in P. ovata. Recovery of their germination capacity after transferring the treated seeds to distilled water was determined and in all cases except in OP of -0.2 Mpa, high germination frequencies of more than 80% were observed after 1-2 week of incubation in distilled water.
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How to cite this article:

A. Rahimi, M.R. Jahansoz , H.R. Rahimian Mashhadi , K. Postini and F. Sharifzade , 2006. Effect of Iso-Osmotic Salt and Water Stress on Germination and Seedling Growth of Two Plantago species. Pakistan Journal of Biological Sciences, 9: 2812-2817.

DOI: 10.3923/pjbs.2006.2812.2817

URL: https://scialert.net/abstract/?doi=pjbs.2006.2812.2817

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