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Agronomic, breeding, and biotechnological approaches to parasitic plant management through manipulation of germination stimulant levels in agricultural soils

Journal

BOTANY
Volume 89, Issue 12, Pages 813-826

Publisher

CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/B11-075

Keywords

parasitic weeds; control; breeding for resistance; cultural practices; germination; biological control; biotechnology; strigolactones; Orobanche; Striga

Categories

Funding

  1. European fund for regional development (FEDER) funds [P07-AGR-02883, AGL2008-01239/AGR]
  2. National Science Foundation [DBI-0701748]
  3. US Department of Agriculture [135798]
  4. International Outgoing European Marie Curie postdoctoral fellowship [PIOF-GA-2009-252538]

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A number of plant species have adapted to parasitize other plants, and some parasitic species pose severe constraints to major crops. The role of strigolactones and other metabolites present in host root exudates as germination stimulants for weedy root parasitic weed seeds has been known for the last 40 years. Recently, the ecological and developmental roles of strigolactones have been clarified by the discovery that they are a new class of plant hormone that controls shoot branching and serve as host recognition signals for mycorrhizal fungi. Parasitic plants also recognize these chemicals and use them to coordinate their life cycle with that of their host. Here we review agronomic practices that use parasitic germination stimulant production as a target for manipulation to control parasitic weeds.

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