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Publication Type J
Authors Al-Shamsi, N., A. El-Keblawy, K. A. Mosa and T. Navarro
Title Drought tolerance and germination response to light and temperature for seeds of saline and non-saline habitats of the habitat-indifferent desert halophyte Suaeda vermiculata
Source Acta Physiologiae Plantarum
Language English
Author Keywords Drought tolerance Germination requirement Maternal habitat Polyethylene glycol Seed germination arabian deserts salt tolerance salsola-vermiculata maternal salinity anabasis-setifera seedling growth water-stress soil-water chenopodiaceae shrub Plant Sciences
Abstract Few plants are habitat-indifferent halophytes (i.e., grow well in both saline and non-saline soils). These plants offer a good opportunity to study drought and salinity tolerances during germination for seeds developed and matured in soils differ in salinity. Here, we assessed drought tolerance during germination, as simulated with PEG, and response of germination to light and temperature for Suaeda vermiculata, a habitat-indifferent shrub. Seeds matured in saline and non-saline soils were germinated in six PEG concentrations (0 to -1.0MPa) and put in three incubators adjusted at different temperatures in both light and dark regimes. Drought tolerance was greater for seeds of the non-saline than those of saline soils, especially at higher temperatures. Seeds of the saline soils germinated in the lowest osmotic potentials (-0.8 and -1.0MPa) only at lower temperatures, but seeds of the non-saline soils germinated to higher levels at all temperatures. Tolerances to drought and high temperatures were greater in light for seeds of saline soils, but in darkness for seeds of non-saline soils. Germination rate index did not differ significantly between seeds of the two soil types in higher osmotic potentials, but was significantly greater in seeds of non-saline at lower osmotic potentials. Most seeds that failed to germinate in the PEG concentrations recovered their germination when transferred to distilled water. Germination recovery levels and speeds increased with the decrease in osmotic potentials. Seeds of the saline soil postpone their germination until arrival of suitable temperatures and effective rainfalls that ensure seedling survival in salty habitats of the arid unpredictable deserts.
Author Address [El-Keblawy, Ali; Mosa, Kareem A.] Univ Sharjah, Dept Appl Biol, Fac Sci, POB 27272, Sharjah, U Arab Emirates. [El-Keblawy, Ali] Al Arish Univ, Dept Biol, Fac Sci, Arish, Egypt. [Al-Shamsi, Naeema] United Arab Emirates Univ, Dept Biol, Fac Sci, Al Ain, U Arab Emirates. [Mosa, Kareem A.] Al Azhar Univ, Dept Biotechnol, Fac Agr, Cairo, Egypt. [Navarro, Teresa] Univ Malaga, Dept Biol Vegetal, POB 59, Malaga 29080, Spain. El-Keblawy, A (reprint author), Univ Sharjah, Dept Appl Biol, Fac Sci, POB 27272, Sharjah, U Arab Emirates.; El-Keblawy, A (reprint author), Al Arish Univ, Dept Biol, Fac Sci, Arish, Egypt. akeblawy@sharjah.ac.ae
ISSN 0137-5881
ISBN 0137-5881
29-Character Source Abbreviation Acta Physiol. Plant.
Publication Date Nov
Year Published 2018
Volume 40
Issue 11
Beginning Page 13
Digital Object Identifier (DOI) 10.1007/s11738-018-2771-z
Unique Article Identifier WOS:000448589800001
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