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Because my research has always focused on the ?hidden half? of the plant, i.e. the root, and especially on the beneficial interactions that take place between plant roots and microbes in the rhizosphere microbiome, I made the transition early on to working on plant microbiomes. In so doing, we began to investigate a broader range of plant-growth promoting bacteria (PGPB), which are associated with roots, especially those isolated from arid environments. Our rationale is that as the climate changes, agricultural productivity will decline because crop-growing regions will become drier and less fertile. Novel drought-adapted, nitrogen-fixing bacteria are likely to provide genetic traits that increase both nutrient availability and environmental tolerance to salinity and drought brought about by reduced rainfall, higher soil acidity, and increased temperatures. In addition, many PGPB are effective at inhibiting plant pathogens, either directly by killing the pathogens or indirectly by making plants healthier so they can overcome pathogen infection. Moreover, a combination of nitrogen-fixing bacteria and one or more PGPB, such as Micromonospora or Bacillus spp., enhance plant growth and yield beyond single inoculation. The development of microbial consortia for plant inocula is the next direction of research that the Hirsch lab is pursuing. The microbes that inhabit nitrogen-fixing nodules grown in field conditions are the best way to determine which bacteria are compatible with another and could be used to establish consortia. My lab is also pursuing metagenomic and cultivation-dependent analysis of dryland soils as a means to find novel bacteria for inoculum development. We have licensed our discoveries from the Negev Desert (Israel) research, and we have a pending agreement with an agricultural company that is developing novel inocula to replace chemical amendments for certain crops. Studies in other deserts and dry environments are also in place.
Research Interests
Papers共 34 篇Author StatisticsCo-AuthorSimilar Experts
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Plant and Soilno. 1-2 (2021): 507-526
Ann M. Hirsch, Denise C. Moraes
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY (2014)
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ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY (2010): 351-362
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