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The influences of simulated moisture stress conditions and osmotic substrates on germination and growth of cultivated and wild safflowers

Published online by Cambridge University Press:  27 March 2009

A. Bassiri ,
M. Khosh-Khui  and
I. Rouhani
A. Bassiri
Affiliation:
College of Agriculture, Pahlavi University, Shiraz, Iran
M. Khosh-Khui
Affiliation:
College of Agriculture, Pahlavi University, Shiraz, Iran
I. Rouhani
Affiliation:
College of Agriculture, Pahlavi University, Shiraz, Iran
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Summary

Comparisons were made between cultivated safflower varieties (Carthamus tinctorius L.) and six wild ecotypes (C. oxyacantha Bieb.) for their tolerance to simulated drought conditions. Plant characteristics of the wild strains were noted and soil samples from their collection sites were analysed for the electrical conductivity of the saturation extract. Polyethylene glycol 6000, mannitol and sodium chloride were used as osmotic substrates to prepare aqueous solutions having 0, 1, 2, 5, 8, 12, 15 and 18 atm. of osmotic potentials (OP). The influences of treatments were studied on seed germination, shoot length and fresh and dry weights of shoots and roots of seedlings.

Increased OPs progressively delayed and reduced seed germination, shoot length and fresh and dry weights of seedlings. Shoots were, however, more adversely affected than roots. Wild ecotypes were apparently more sensitive to high OPs than the cultivated varieties.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 88 , Issue 1 , February 1977 , pp. 95 - 100
Copyright
Copyright © Cambridge University Press 1977

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