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Publication Type J
Authors Gulzar, S., M. A. Khan and I. A. Ungar
Title Effect of salinity and temperature on the germination of Urochondra setulosa (Trin.) CE Hubbard
Source Seed Science and Technology
Language English
Author Keywords grass diplachne-fusca seed-germination spartina-alterniflora responses growth halophytes dormancy pakistan plants light Agriculture Plant Sciences
Abstract Urochondra setulosa (Trin.) C.E. Hubbard is a halophytic grass occurring in coastal areas of Sind Province and in a pure stand at the upper end of Manora creek at Hawkes Bay, Karachi, Pakistan. Seeds were collected from a salt flat situated at the Hawkes Bay location and germinated under a range of salinity and temperature regimes. Highest germination percentages were obtained under non-saline conditions and increases in salinity inhibited seed germination, with less than 10% of the seeds germinating at 500 mM NaCl. Germination was inhibited by either an increase or decrease in temperature from the optimal temperature regime of 20-30 degreesC. The rate of germination, percent recovery germination and rate of recovery were greatest at 20-30 degreesC, with the lowest germination and recovery occurring at the 10-20 degreesC temperature regime. An interaction between salinity and the 10-20 degreesC temperature regime yielded no germination at salinities of 300 mM and higher whereas, some seeds germinated in up to 500 mM NaCl under the optimal temperature treatment (20-30 degreesC).
Author Address Univ Karachi, Dept Bot, Karachi 75270, Pakistan. Ungar, IA (reprint author), Ohio Univ, Dept Environm & Plant Biol, Athens, OH 45701 USA.
ISSN 0251-0952
ISBN 0251-0952
29-Character Source Abbreviation Seed Sci. Technol.
Year Published 2001
Volume 29
Issue 1
Beginning Page 21-29
Unique Article Identifier WOS:000167962900003
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