African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Response of three Calligonum species to salinity at germination and seedling stages

H. Dashti1*, H. Azarnivand2, H. Shirani3, M. A. Hajabbasi4 and S. H. Maddahosseini5
1 College of Agriculture, Vali-e-Asr University, Rafsanjan, Iran. 2College of Natural Resource, University of Tehran, Iran. 3College of Agriculture, Vali-e-Asr University, Rafsanjan, Iran. 4College of Agriculture, Isfahan University of Technology, Isfahan, Iran. 5College of Agriculture, Vali-e-Asr University, Rafsanjan, Iran.
Email: [email protected]

  •  Accepted: 22 August 2011
  •  Published: 19 September 2011

Abstract

In order to study the effects of salinity stresses on seed germination characteristics and seedling growth ofCalligonum, three species of Calligonum, namely, C. comosumC. polygonoides and C. persicum were evaluated. Three separate experiments was carried out; Experiment 1: salinity in four levels of 0, 6, 12 and 18 dS/m NaCl, were applied and the traits; germination percent, germination rate, length and dry weight of plumule and radicle and Naconcentration in seedling tissues were measured. In Experiment 2, non-germinated seeds from Experiment 1 were transferred into distilled water and then seed germination recovery was studied. In Experiment 3: two levels of salinity and three Calligonum species were conducted with three replications in pots and time course of survival percentage were recorded. Results showed that salinity reduced all the above mentioned traits. With increasing salinity the Naconcentration in C. persicum increased more than the other two species.  The C. polygonoides species had the highest germination recovery index. The results of probit analysis showed that C. polygonoides has the highest Lt50 and salinity tolerance. Cluster analysis on the basis of studied traits and Ward's method revealed that there is a significant level of genetic diversity between the three species.

 

Key words: Calligonum, salt tolerance, LT50, probit analysis.