By Manuel J. Reigosa, Nuria Pedrol, Luís González
This ebook offers the reader suitable information regarding genuine wisdom concerning the strategy of allelopathy, masking all points from the molecular to the ecological point. exact relevance is given to the physiological and ecophysiological elements of allelopathy. a number of ecosystems are studied and methodological concerns are taken into consideration in numerous diverse chapters. The ebook has been written to be worthy either for Ph.D. scholars and for senior researchers, so the chapters comprise all worthwhile details to be learn via newcomers, yet in addition they comprise loads of necessary info and dialogue for the initiated.
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Additional resources for Allelopathy: A Physiological Process with Ecological Implications
Meliloti. Similar compounds may be responsible for vesicular-arbuscular mycorrhizal colonization (Walker et al. 2003). Flavonoids are actively excreted by the roots of many plants and are released from leaf litter. Flavones from Celaenodendron mexicanum (Euphorbiaceae) were shown to inhibit the growth of seeds and shoots of Amaranthus and Echinocloa species. A flavonoid from Tithonia diversifolia inhibited germination of radish, cucumber (Cucumis sativus), and onion (Allium cepa) seeds (Berhow and Vaughn, 1999).
Amines and simple alkaloids, polyamines and polyamine alkaloids Among the amines and simple alkaloids, indole 3-acetic acid, is important. This plant hormonal substance is produced by both plants and fungi, albeit by different pathways. Hordenine and gramine from barley plants have generally been considered to be allelopathic as barley fields are usually quite free from weeds (Seigler, 1998). Gramine inhibits radicle growth of several plants (Wink, 1993). 46 Basic pathways for the origin of allelopathic compounds Polyamines are of relatively simple biosynthetic origin.
47 David S. Seigler Ethylene is liberated from the non-protein amino acid 1-aminocyclopropane-1carboxylic acid (ACC), which is formed from the same series of pathways that leads to synthesis of many of the polyamines above (Seigler, 1998). Pyridine alkaloids Nicotine, a pyridine alkaloid, inhibits radicle growth of Lepidium, and is toxic to Lemna plants (Wink, 1993). Trigonelline, now known to be widespread in plants, promotes cell arrest in the G2-stage of the cell cycle (Seigler, 1998). Salsoline weakly inhibits protein synthesis (Wink et al.