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Authors Foroughi, A; Gherekhloo, J; Ghaderi-Far, F
Author Full Name Foroughi, A.; Gherekhloo, J.; Ghaderi-Far, F.
Title EFFECT OF PLANT DENSITY AND SEED POSITION ON MOTHER PLANT ON PHYSIOLOGICAL CHARACTERISTIC OF COCKLEBUR (Xanthium strumarium) SEEDS
Source PLANTA DANINHA
Language English
Document Type Article
Author Keywords shade environment; cardinal temperature; competition; dormancy
Keywords Plus GERMINATION; GROWTH; TEMPERATURE; DORMANCY; SENSITIVITY; MORPHOLOGY; CHICKPEA; SHADE; LIGHT; TIME
Abstract Experiments were conducted in 2010 to determine the influence of plant density and seed position on the mother plant on seed physiological characteristics of cocklebur (Xanthium strumarium). Cocklebur burs were collected in fall of 2010 from Research Farm of University of Agricultural Sciences and Natural Resources of Gorgan, Iran. The experiment was established as factorial arrangement using a completely randomized design with three replications. The factors included different densities of cocklebur (0, 2, 4, 6 and 8 plant m(-2)) and the top and bottom parts of the canopy. Non dormant seeds were used for determining cardinal temperatures and tolerance to salinity and drought stresses. Base, optimum and ceiling germination temperatures were estimated between 7.09 to 12.33, 32 to 35 and 44 to 45 respectively in different treatments. Salinity stress up to 300 Mm and osmotic potential 8 bar inhibited the germination completely. Comparison of base temperatures and sigmoid equation coefficients showed that seeds produced in the top had higher germination than those that produced at the bottom of the mother plant. It seems plant densities through seed position on the mother plant affect seed quality. Likewise changes of light quality and quantity in shade environment increased seed dormancy in matured seeds. Shade environment affect seed germination on mother plant that increased dormancy of seeds maturing under shade be an adaptive response that reduces the probability of germination of offspring under unfavorable (shade, competitive) conditions.
Author Address [Foroughi, A.; Gherekhloo, J.; Ghaderi-Far, F.] Univ Agr Sci & Nat Resources, Gorgan, Iran
Reprint Address Foroughi, A (corresponding author), Univ Agr Sci & Nat Resources, Gorgan, Iran.
E-mail Address abbasfrooghi@yahoo.com
Times Cited 3
Total Times Cited Count (WoS, BCI, and CSCD) 3
Publisher UNIV FEDERAL VICOSA
Publisher City VICOSA
Publisher Address CAIXA POSTAL 270, VICOSA, MG CEP 36571-00, BRAZIL
ISSN 0100-8358
29-Character Source Abbreviation PLANTA DANINHA
ISO Source Abbreviation Planta Daninha
Publication Date JAN-MAR
Year Published 2014
Volume 32
Issue 1
Beginning Page 61
Ending Page 68
Digital Object Identifier (DOI) 10.1590/S0100-83582014000100007
Page Count 8
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number AG1AB
Unique Article Identifier WOS:000335146100007
Plants associated with this reference

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