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Authors Gairola, S; El-Keblawy, A
Author Full Name Gairola, Sanjay; El-Keblawy, Ali
Title Seed germination behavior of five Resedaceae species from arid Arabian desert: gibberellic acid and light effects
Source PLANT BIOSYSTEMS
Language English
Document Type Article; Early Access
Author Keywords Germination; photoblastism; dormancy; seed bank; seed size; Arabian deserts
Keywords Plus DORMANCY REGULATING CHEMICALS; MATERNAL HABITAT; ABSCISIC-ACID; TEMPERATURE; PLANT; SALINITY; SALT; L.; REQUIREMENTS; MATURATION
Abstract Light and growth-promoting compounds, such as gibberellic acids (GA(3)), are among the most important factors that can break physiological seed dormancy. Here, we investigate the effects of GA(3) and light on germination of five species of Resedaceae that are known to have different levels of physiological dormancy. Seeds were incubated at 20/30??C in both 12-hr photoperiod and complete darkness. To study the effect of growth hormone on germination, seeds were soaked for 24?h in different concentrations of GA(3) before sowing. The annuals (Reseda aucheri and Oligomeris linifolia) and the perennial Ochradenus arabicus had deep physiological dormancy, and exogenous application of GA(3) enhanced their germination in the light, but not in darkness; few or no seeds germinated in the dark in these species. Ochradenus aucheri and O. baccatus had intermediate and non-deep dormancy, respectively, and application of GA(3) enhanced their germination in both light and darkness. Germination of the annual species was much slower than that of the shrubby perennials. Overall, these results indicate that conditions under which seed developed, matured and stored on maternal plants as well as incubation conditions should be taken into consideration when assessing germination behavior of the perennial species of Resedaceae.
Author Address [Gairola, Sanjay] Sharjah Res Acad, Sharjah Seed Bank & Herbarium, Sharjah, U Arab Emirates; [El-Keblawy, Ali] Univ Sharjah, Fac Sci, Dept Appl Biol, Sharjah, U Arab Emirates
Reprint Address Gairola, S (reprint author), Sharjah Res Acad, Sharjah Seed Bank & Herbarium, Sharjah, U Arab Emirates.
E-mail Address sgairola@sra.ae
ORCID Number El-Keblawy, Ali/0000-0003-4448-6236
Publisher TAYLOR & FRANCIS LTD
Publisher City ABINGDON
Publisher Address 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
ISSN 1126-3504
29-Character Source Abbreviation PLANT BIOSYST
ISO Source Abbreviation Plant Biosyst.
Digital Object Identifier (DOI) 10.1080/11263504.2019.1674397
Page Count 8
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number JE8BL
Unique Article Identifier WOS:000490914900001
Plants associated with this reference

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