By Manuel J. Reigosa, Nuria Pedrol, Luís González
This publication offers the reader correct information regarding real wisdom in regards to the means of allelopathy, masking all facets from the molecular to the ecological point. targeted relevance is given to the physiological and ecophysiological points of allelopathy. a number of ecosystems are studied and methodological concerns are taken into consideration in different assorted chapters. The e-book has been written to be worthy either for Ph.D. scholars and for senior researchers, so the chapters comprise all beneficial info to be learn via newbies, yet additionally they comprise loads of necessary info and dialogue for the initiated.
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Additional info for Allelopathy: A Physiological Process with Ecological Implications
This species also contains coumarin, simple coumarins, and a series of monoterpenes and alkaloids derived from anthranilic acid (Aliotta and Cafiero, 1999). 25 David S. Seigler Lignans and lignin Four phytotoxic lignans from cenizo, Leucophyllum frutescens, are responsible for the phytotoxic activity exhibited by this species (Rimando et al. 1999). Three of these compounds, diayangambin, epiyangambin, and diasesartemin, inhibited all phases of onion root cell division. 26 Basic pathways for the origin of allelopathic compounds PHENYLPROPANOIDS WITH ACETATE CHAIN EXTENSION A series of phenylpropanoids with extension by three malonate groups may be condensed by two different mechanisms.
2004). The biosynthetic process leading to formation of (-)-catechin is not known. The dimer propelargonidin and the corresponding monomer afzelachin inhibit growth of rice seedlings and may be responsible for limited growth of peach seedlings (Ohigashi et al. 1982). Secretion of propelargonidin may explain, in part, the problem with replanting peaches, Prunus persica (Ohigashi et al. 1982). Interestingly, (+)catechin and procyanidins promote growth of callus cultures of other Prunus species (Feucht and Treutter, 1999).
1999). Alfalfa roots often contain as much as 4-5% saponins. These saponins consist of mono-, bi-, and tridesmosides and have from 2-7 sugar moieties attached. These saponins are responsible for many of the antinutritional aspects of alfalfa, and may also be responsible for the autotoxic effects and allelopathy attributed to this species (Oleszek et al. 1999). When cotton is grown in the same fields following alfalfa crops, the yields are considerably reduced. In other studies, alfalfa root saponins have been shown to be toxic to cotton.
Allelopathy: A Physiological Process with Ecological Implications by Manuel J. Reigosa, Nuria Pedrol, Luís González