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Publication Type J
Authors El-Keblawy, A., S. Gairola, A. Bhatt and T. Mahmoud
Title Effects of maternal salinity on salt tolerance during germination of Suaeda aegyptiaca, a facultative halophyte in the Arab Gulf desert
Source Plant Species Biology
Author Keywords germination halophytes maternal salinity seed size Suaeda aegyptiaca invasive prosopis-juliflora seed-germination arabidopsis-thaliana soil-salinity dry storage light temperature growth plants thermoperiod
Abstract This study tested the effects of maternal salinity on salt tolerance during seed germination of Suaeda aegyptiaca under different light and temperature regimes. Seeds of the non-saline habitat were 56% heavier and attained greater germination at the lower temperatures than seeds of the saline habitat. Seeds of saline habitat germinated better in saline solutions at higher temperatures and in light. Suaeda aegyptiaca is a facultative halophyte found in saline and non-saline habitats of the Arab Gulf desert, which produces small-sized undispersible seeds. The interactive effects of maternal salinity and other environmental conditions, such as salinity, light and temperatures, that are prevailing during seed germination have received little attention for a facultative halophyte. This study tested the effects of maternal salinity on salt tolerance during seed germination of S. aegyptiaca under different light and temperature regimes. Seeds collected from both saline and non-saline habitats of the United Arab Emirates (UAE) were germinated in 0, 50, 100, 200 and 400 mM NaCl, and incubated at 15/25 degrees C, 20/30 degrees C and 25/35 degrees C in both 12-h light/12-h dark regimes and continuous darkness. Generally, seeds of the non-saline habitat were 56% heavier and attained greater germination at the lower temperatures than seeds of the saline habitat. Seeds of the saline habitat germinated better in saline solutions at higher temperatures and in light. Germination was faster for seeds of the saline habitat than for seeds of non-saline habitats. Germination recovery after transfer to distilled water was significantly greater for seeds from the non-saline habitat, compared with seeds from saline habitats. Recovery was greater at lower and/or moderate temperatures, compared with at higher temperatures. Germination was significantly faster during recovery, compared with in the saline solutions. The study indicates that the maternal effect of salinity was confounded with the seed-size effect and it cannot be conclusively confirmed.
Author Address [El-Keblawy, Ali] Univ Sharjah, Dept Appl Biol, Fac Sci, Sharjah 27272, U Arab Emirates. [El-Keblawy, Ali] Univ Sharjah, Sharjah Res Acad, Sharjah 27272, U Arab Emirates. [Gairola, Sanjay; Mahmoud, Tamer] Sharjah Res Acad, Sharjah Seed Bank & Herbarium, Sharjah, U Arab Emirates. [Bhatt, Arvind] Gulf Org Res & Dev, Doha 210162, Qatar. [El-Keblawy, Ali] Suez Canal Univ, Dept Biol, Fac Educ Al Arish, Ismailia, Ismailia Govern, Egypt. El-Keblawy, A (reprint author), Univ Sharjah, Dept Appl Biol, Fac Sci, Sharjah 27272, U Arab Emirates.; El-Keblawy, A (reprint author), Univ Sharjah, Sharjah Res Acad, Sharjah 27272, U Arab Emirates. akeblawy@sharjah.ac.ae
ISSN 0913-557X
ISBN 0913-557X
29-Character Source Abbreviation Plant Spec. Biol.
Publication Date Jan
Year Published 2017
Volume 32
Issue 1
Beginning Page 45-53
Digital Object Identifier (DOI) 10.1111/1442-1984.12127
Unique Article Identifier WOS:000393660100005

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