| Autor: |
Ram, R. L., Maji, C., Bindroo, B. B. |
| Předmět: |
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| Zdroj: |
Indian Journal of Sericulture; Jun2013, Vol. 52 Issue 1, p1-13, 13p |
| Abstrakt: |
The organisms that establish positive interactions with plant roots and exhibit observable benefits on the plant growth arc collectively termed as plant growth promoting bacteria (PGPR). They are naturally occurring soil microorganisms, which colonize roots and stimulate plant growth. Such bacteria have been applied to a wide range of agricultural species for the purposes of growth enhancement including increased seed emergence, plant weight, crop yields and disease control. Several chemical changes in soils are fully associated with these bacteria in which some bacterial strains directly regulate plant physiology by promoting synthesis of plant hormones, whereas others increase mineral nutrients availability in the soil as a way to augment growth and development. Beneficial effects of PGPR by its supplemental application to crops or soil were first reported from the former Soviet Union in 1950 and later in Western countries. PGPR were initially applied, to enhance crop fertility by increasing the amount of available N and thereafter were used as biological control agents for suppression of soil borne pathogens. Since 1980 onwards, PGPR have been popular in China and India and referred as yield-increasing bacteria (YIB) followed by biofertilizers in India. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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