African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6649

Full Length Research Paper

Allelopathic influence of leek (Allium porrum) seeds on germination and radical growth of flue-cured tobacco of different cultivars

Rongquan Lai1,2,3, Minsheng You1* ,Shunhui Chen4, Gang Gu4,Gang WANG5 and Chenglian Lai6
1Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, P. R China. 2Longyan City Corporation of Fujian Province Tobacco Corporation, Longyan, Fujian, 364000, P. R. China. 3Longyan Substation of Fujian Science and Research Institute of Tobacco Farming, Longyan, Fujian, 364000, P. R. China. 4Fujian Science and Research Institute of Tobacco Farming, Fuzhou, Fujian, 350001, P. R China. 5China National Leaf Tobacco Corporation, Beijing, 100055, P. R China. 6China Tobacco Fujian Industrial Corporation, Xiamen, Fujian, 361000, P. R China.
Email: [email protected]

  •  Accepted: 27 February 2012
  •  Published: 30 April 2012

Abstract

Leeks (Allium porrum L.) are increasingly included in the rotation or inter-planting with tobacco in many provinces of China and worldwide. Therefore, we examined the possible allelopathic potential of leek seeds on the germination, seedling emergence and root elongation of flue-cured tobacco of different cultivars. The effects of imbibed leek seeds, their aqueous leachates and extracts of the seed on the germination and root elongation of the seeds of four test flue-cured tobacco cultivars, K 326, Yunyan 85, Zhongyan 100 and NC 89, under both aseptic and soil conditions, were investigated. Inhibitory effects were evident in all of the bioassays of these tobacco seeds. The leachates of the leek seeds and the aqueous seed extract were highly inhibitory, but the seeds themselves were less inhibitory. The observations indicate a release of inhibitory substances from the leek seeds leading to the observed inhibitory effects. The results of this study may be very useful for the management of crop rotations/systems involving leek as a component.

 

Key wordsAllium porrum L., allelopathy, flue-cured tobacco, inhibitory effects, seed germination, seed extract.