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Authors El-Keblawy, A
Author Full Name El-Keblawy, A.
Title Impacts of dormancy-regulating chemicals on innate and salinity-induced dormancy of four forage grasses native to Arabian deserts
Source GRASS AND FORAGE SCIENCE
Language English
Document Type Article
Author Keywords dormancy-regulating chemicals; desert grasses; glycophytes; salinity-induced dormancy; seed germination
Keywords Plus SEED-GERMINATION; GROWTH-REGULATORS; TEMPERATURE; LIGHT; ALLEVIATION; RESPONSES; NACL; POPULATIONS; FUSICOCCIN; TOLERANCE
Abstract The effects of dormancy-regulating chemicals (DRCs) on alleviating innate and salinity-induced dormancy (SID) were assessed in seeds of four perennial forage grasses (Pennisetum divisum, Sporobolus spicatus, Coelachyrum brevifolium and Centropodia forsskalii). These grasses have the potential to be used for restoration or rehabilitation of degraded rangelands of the Arabian Gulf deserts. The four species showed various levels of innate dormancy. Germination of seeds stored for 2months was not enhanced by any of the five studied DRCs in both C.brevifolium and P.divisum, but significantly improved by thiourea, fusicoccin and gibberellic acid (GA) in C.forsskalii and by thiourea, fusicoccin and nitrate in S.spicatus. Salinity had a significant negative effect on all the studied grasses. Sporobolus spicatus was more tolerant to salinity, compared with the other species. The effect of DRCs on alleviating SID depended on species. Whereas DRCs had little effect on alleviating SID in C.forsskalii and P.divisum, they greatly alleviated it in S.spicatus and C.brevifolium. Partial alleviation was observed by fusicoccin in C.brevifolium and by GA, kinetin and thiourea in C.forsskalii. Nitrate, fusicoccin and GA resulted in a complete alleviation in S.spicatus seeds in 200mm NaCl.
Author Address [El-Keblawy, A.] Sharjah Univ, Dept Appl Biol, Sharjah, U Arab Emirates; [El-Keblawy, A.] Sharjah Res Acad, Sharjah, U Arab Emirates; [El-Keblawy, A.] Suez Canal Univ, Fac Educ Al Arish, Dept Biol, Cairo, Egypt
Reprint Address El-Keblawy, A (corresponding author), Sharjah Univ, Dept Appl Biol, POB 27272, Sharjah, U Arab Emirates.
E-mail Address akeblawy@sharjah.ac.ae
ORCID Number El-Keblawy, Ali/0000-0003-4448-6236
Times Cited 13
Total Times Cited Count (WoS, BCI, and CSCD) 13
Publisher WILEY
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 0142-5242
29-Character Source Abbreviation GRASS FORAGE SCI
ISO Source Abbreviation Grass Forage Sci.
Publication Date JUN
Year Published 2013
Volume 68
Issue 2
Beginning Page 288
Ending Page 296
Digital Object Identifier (DOI) 10.1111/j.1365-2494.2012.00901.x
Page Count 9
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number 132BF
Unique Article Identifier WOS:000318042000008
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