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| Publication Type | J |
| Authors | Ahmed, M. Z., S. Gulzar and M. A. Khan |
| Title | Role of Dormancy Regulating Chemicals in Alleviating the Seed Germination of Three Playa Halophytes |
| Source | Ekoloji |
| Author Keywords | Dormancy Gibberellin Kinetin Nitrate Playa halophytes Prolific Salinity and Thiourea salinity stress allenrolfea-occidentalis growth-regulators relieving compounds lepidium-sativum abscisic-acid temperature thiourea fusicoccin osmotica |
| Abstract | The effects of dormancy regulating chemicals [nitrate, thiourea, prolific, kinetin and gibberellin (GM)] were tested on the seed germination of three salt playa halophytes, Halogeton glomeratus, Lepidium and Peganum harmala under various salinity treatments (0 to 400 mM NaCl) and photoperiod regimes (12/12 h light/dark and 24 Is dark). More than 80% of all seed species germinate under non-saline conditions in a 12/12 h light/dark photoperiod. However, there was a progressive increase in the enforced dormancy with an increase in salinity treatments. Thiourea substantially improved seed germination and the rate of germination of all test species under saline conditions. Kinetin partially alleviated the salinity effect on the seed germination of H. glomeratus and P harmala but not for L. latifolium. GM substantially improved the seed germination in L. latifolium. Nitrate and proline had no effect under saline conditions. Seed germination was completely inhibited in L. latifolium, partially in P harmala, but had no effect on H. glomeratus seeds when germinated in the dark. GM alleviated dark inhibition in the order: L. latifolium > P harmala > H. glomeratus. Species specific responses to GM and kinetin and environmentally mediated responses of thiourea appear to influence the seed germination of the salt playa species. |
| Author Address | [Ahmed, Muhammad Zaheer; Gulzar, Salman; Khan, M. Ajmal] Univ Karachi, ISHU, Karachi 75270, Pakistan. [Khan, M. Ajmal] Qatar Univ, Coll Arts & Sci, Dept Int Affairs, Qatar Shell Professorial Chair Sustainable Dev, Doha, Qatar. Khan, MA (reprint author), Univ Karachi, ISHU, Karachi 75270, Pakistan. ajmal.khan@qu.edu.qa |
| ISSN | 1300-1361 |
| ISBN | 1300-1361 |
| 29-Character Source Abbreviation | Ekoloji |
| Year Published | 2014 |
| Volume | 23 |
| Issue | 92 |
| Beginning Page | 1-8 |
| Digital Object Identifier (DOI) | 10.5053/ekoloji.2014.921 |
| Unique Article Identifier | WOS:000348465300001 |
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