Techno Press


Advances in Environmental Research   Volume 4, Number 1, March 2015, pages 1-15
DOI: http://dx.doi.org/10.12989/aer.2015.4.1.001
 
Allelopathic effects of red pepper (Capsicum annuum L.) and coriander (Coriandrum sativum L.) on early seedling growth of wheat (Triticum aestivum L.)
Muhammad Zafar Iqbal, Lubna Ahmed, Muhammad Shafiq and Mohammad Athar

 
Abstract     [Full Text]
    A pot experiment was conducted to assess the effects of red pepper (Capsicum annuum) and coriander (Coriandrum sativum) on seedling growth of wheat (Triticum aestivum). The aqueous extracts treatment of red pepper and coriander showed a significant (p < 0.05) reduction in root, shoot and seedling length, number of leaves and seedling dry weight of wheat (T. aestivum) as compared to control. The inhibitory different effect on growth of wheat (T. aestivum) was directly proportional to the increasing concentration (1, 2, 3, 4 and 5%) of aqueous extracts of red pepper and coriander as compared to control treatment (0%). The root, shoot, seedling length and number of leaves of T. aestivum significantly p < 0.05 decreased at 5% concentration of red pepper as compared to control. The root, shoot and seedling growth of T. aestivum was also significantly reduced at 1, 2, 3, 4 and 5% concentration of coriander as compared to control. The root, shoot and leaves dry weight of T. aestivum at 5% coriander extract treatment concentration decreased as compared to control. The tolerance in seedlings of T. aestivum to red pepper and coriander extract treatment was dose dependent as compared to control. The seedlings of T. aestivum showed low percentage of tolerance to pepper extract treatment than coriander extract treatment.
 
Key Words
    red pepper; coriander; plant extracts; allelopathy; phytotoxicity; seedling growth; wheat
 
Address
(1) Muhammad Zafar Iqbal, Lubna Ahmed, Muhammad Shafiq:
Department of Botany, University of Karachi, Karachi-75270, Pakistan;
(2) Mohammad Athar:
Department of Food Science and Technology, University of Karachi, Karachi-75270, Pakistan;
(3) Mohammad Athar:
California Department of Food and Agriculture, 3288 Meadowview Road, Sacramento, CA 95832, USA.
 

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