S. J. H. Rizvi, H. Haque, V. K. Singh, V. Rizvi (auth.), S.'s Allelopathy: Basic and applied aspects PDF

By S. J. H. Rizvi, H. Haque, V. K. Singh, V. Rizvi (auth.), S. J. H. Rizvi, V. Rizvi (eds.)

ISBN-10: 9401050481

ISBN-13: 9789401050487

ISBN-10: 9401123764

ISBN-13: 9789401123761

Science is basically a descriptive and experimental gadget. It observes nature, constructs hypotheses, plans experiments and proposes theories. the speculation is rarely meditated because the 'final truth', yet continues to be ever topic to transformations, alterations and rejections. The technology of allelopathy in a similar fashion has emerged, and exists on an identical footing; our endeavour could be to maintain it clean and leading edge with addition of more moderen in­ formation and ideas with the rejection of older rules and antiquated thoughts. in the past few many years encouraging effects were received in numerous facets of allelopathic researches. even though, as well as carrying on with efforts in a majority of these instructions, consistent makes an attempt are to be made to explain the mechanics of allelopathic job in molecular phrases and to find methods and ability to use it for the welfare of mankind. We suppose that multidisciplinary efforts are the single software to accomplish this target. it's the wish of the editors that this ebook will function a rfile which identifies an built-in technique, wherein examine either to appreciate and take advantage of allelopathy should be carried out. the current quantity arose out of an try to compile eminent scientists in allelopathy to explain their paintings, of a hugely various nature, below one title.

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This could explain why it remains so long in almost pure stands. The numbers of nodules on Indigofera cordifolia growing in association with Aristida adscensionis in the field in India are significantly lower than on I. cordifolia growing where Aristida is absent (Murthy and Ravindra, 1974; Murthy and Nagodra, 1977; Sarma, 1983). Moreover, the nodules on control plants are pinkish-red in colour whereas they are black on plants growing with Aristida (Sarma, 1983). Shoot and root extracts of A. adscensionis and leachates of its residues inhibited growth of Rhizobium isolated from nodules of I.

1). Seven phenolic acids, previously identified as allelochemicals from pioneer weeds, inhibited growth of three free-living Nz-fixers, Azotobacter chroococcum, Enterobacter aerogenes and Clostridium sp. Aqueous soil extracts from the pioneer weed stage, the annual grass stage and the climax inhibited growth of E. aerogenes. Rice (1964, 1965) reported that water extracts of several pioneer weeds and of A. oligantha, the dominant of the second stage, inhibited growth of A. chroococcum 0 0 0 20a 7c 24 Jun 2 4b 15c 21 May 25 117b 121c 820 59 36 35 Jun 9 9ab 5c 19 Jun 16 Jul 15 Aug 16 14 Sep 28 Sep Oct 19 Nov 16 0 0 0 0 0 0 17 13 25ab 16a 7 10 13a 19ab 5c 8 11 8 ---------------------- 28b 18 13 p moles C2 Hz-reduction.

In fact, in spite of the abundance of recent literature on allelopathy, few reports have addressed the fate of the allelochemicals in the soil environment. Allelopathy: Basic and applied aspects Edited by S. J. H. Rizvi and V. 2 DEFINING THE QUESTION The basic question that must ultimately be addressed is what constitutes proof of an allelopathic effect. Commonly, the evidence for allelopathy includes: (1) symptoms of plant damage, such as reduced germination, growth, or development; (2) presence of substances or organisms (plants or microbes) which contain or are capable of producing phytotoxic chemicals in the vicinity of affected plants; and (3) presence of the phytotoxic chemicals in the extracts of plants or soils in the vicinity of affected plants.

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Allelopathy: Basic and applied aspects by S. J. H. Rizvi, H. Haque, V. K. Singh, V. Rizvi (auth.), S. J. H. Rizvi, V. Rizvi (eds.)

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