Allelopathic effect of walnut leaf extracts on germinating grain amaranth (Amaranthus hypocondriacus) seeds in western Himalayan agri-silviculture system
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Authors
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ABHISHEK BAHUGUNA
College of Forestry & Hill Agriculture, GBPUAT, Hill Campus, Ranichauri, Tehri Garhwal, Uttarakhand 249 199
Author
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PUSHKAR SINGH BISHT
College of Forestry & Hill Agriculture, GBPUAT, Hill Campus, Ranichauri, Tehri Garhwal, Uttarakhand 249 199
Author
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BIRENDRA PRASAD
College of Forestry & Hill Agriculture, GBPUAT, Hill Campus, Ranichauri, Tehri Garhwal, Uttarakhand 249 199
Author
Keywords:
Allelopathy, walnut leaf extract, germination, seedling growth, grain amaranthAbstract
The effects of walnut leaf extracts on grain amaranth (Amaranthus hypocondriacus) cv Prai seed germination and post-germination seedling growth were investigated. Walnut leaf extract was prepared by keeping the crushed dried leaves in distilled water. Seed germination, seedling elongation and weight were determined on the date of final count, however, other seedling vigour ie. vigour index, speed of germination index, relative growth index (RGI), mean daily germination (MDG), mean germination time (MGT) and time to 50% germination (Ts) were calculated as per their respective formulae. There was a significant reduction in seed germination and seedling vigour as an effect of treatment of walnut leaf extracts on grain amaranth. However, MGT and T increased as the leaf extract concentration increased and was found to be lowest in the control. It was found that seed germination and seedling vigour of grain amaranth were affected negatively by walnut leaf extracts in concentration dependent manner.
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References
1. RIETVELD WJ (1983). Allelopathic effects of juglone on germination and growth of several herbaceous and woody species. J Chem Ecol 9: 295-308
2. SEGURA-AGUILAR J, HAKMAN I AND RYDSTROM J (1992). The effect of OH 1, 4-naphthoquinone on Norway spruce seeds during germination. Plant Physiol 100: 1955-61
3. INDERJIT AND MALIK AU (2002). Chemical Ecology of Plants: Allelopathy in Aquatic and Terrestrial Ecosystems. Birkhauser-verlag, Berlin, pp 272
4. TERZI I, KOCACALISKAN I, BENLIOGLU O AND SOLAK K (2003). Effect of juglone on growth on cucumber seedlings with respect to physiological and anatomical parameters. Acta Physiologia Plantarum 25: 353-56
5. JOSE S AND GILLESPIE AR (1998). Allelopathy in black walnut (Juglans nigra L) alley cropping: II. Effect of juglone on hydroponically grown corn (Zea mays L) and soybean (Glycine max L Merr) growth and physiology. Plant and Soil 203: 199-205
6. KOCACALISKAN I AND TERZI I (2001). Allelopathic effects of walnut leaf extracts and juglone on seed germination and seedling growth. J Hort Sci Biotechnol 76: 436-40
7. HEJL AM, EINHELLING FA AND RASMUSSEN JA (1993). Effects of juglone on growth, photosynthesis and respiration. J Chem Ecol 19: 559-68
8. "et al."
