| Abstract: | The growth and development of rice (Oryzae sativa) seedlings was shown to be regulated epigenetically by a fungal endophyte. In contrast to un-inoculated (nonsymbiotic) plants, endophyte colonized (symbiotic) plants preferentially allocated resources into root growth until root hairs were well established. During that time symbiotic roots expanded at five times the rate observed in nonsymbiotic plants. Endophytes also influenced sexual reproduction of mature big sagebrush (Artemisia tridentata) plants. Two spatially distinct big sagebrush subspecies and their hybrids were symbiotic with unique fungal endophytes, despite being separated by only 380 m distance and 60 m elevation. A double reciprocal transplant experiment of parental and hybrid plants, and soils across the hybrid zone showed that fungal endophytes interact with the soils and different plant genotypes to confer enhanced plant reproduction in soil native to the endophyte and reduced reproduction in soil alien to the endophyte. Moreover, the most prevalent endophyte of the hybrid zone reduced the fitness of both parental subspecies. Because these endophytes are passed to the next generation of plants on seed coats, this interaction provides a selective advantage, habitat specificity, and the means of restricting gene flow, thereby making the hybrid zone stable, narrow and potentially leading to speciation. ?? 2009 Landes Bioscience. |
| Genre: | Article |
| ProdID: | 70034833 |
| Citation Author: | Rodriguez, R. J.; Carl, Freeman, D.; McArthur, E. D.; Kim, Y. O.; Redman, R. S. |
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| Citation End Page: | 143 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Communitative and Integrative Biology |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Symbiotic regulation of plant growth, development and reproduction; 2009; Article; Journal; Communitative and Integrative Biology; Rodriguez, R. J.; Carl, Freeman, D.; McArthur, E. D.; Kim, Y. O.; Redman, R. S. |
| Citation Start Page: | 141 |
| Citation Volume: | 2 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Symbiotic regulation of plant growth, development and reproduction; 2009; Article; Journal; Communitative and Integrative Biology; Rodriguez, R. J.; Carl, Freeman, D.; McArthur, E. D.; Kim, Y. O.; Redman, R. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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