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Recognition of root exudates by seeds of broomrape (Orobanche and Phelipanche) species.
Ann Bot. 2009 Feb; 103(3):423-31.AB

Abstract

BACKGROUND AND AIMS

The long co-existence of broomrapes and their hosts within the same environment has culminated in a strong adaptation and effective parasitism. As a first step of specialization in the parasitic process, seed receptors of parasitic plant species vary in their ability to recognize compounds released by their hosts. This work aims to investigate potential patterns for the reception requirements needed to activate germination within Orobanche and Phelipanche species.

METHODS

Induction of the germination of seeds of nine Orobanche and Pheliphanche species by root exudates of 41 plant species was studied and subjected to biplot multivariate analysis.

KEY RESULTS

A high level of specialization in root exudate recognition was found in Orobanche densiflora, O. gracilis and O. hederae, which germinated almost exclusively in contact with root exudates from the plants they infect in nature. At the opposite extreme, Phelipanche aegyptiaca, P. ramosa and O. minor were highly generalist, germinating when in contact with the root exudates of most plant species. Orobanche crenata, O. cumana and O. foetida showed intermediate behaviour.

CONCLUSIONS

A universal germination stimulant for all broomrape species has not being identified to date. The synthetic stimulant GR24 is active against most of the weedy broomrape species, but fails with the non-weedy species tested in this study and with the very recent weedy species O. foetida. In addition, germination behaviour of broomrape species depends on the crop plant tested. Weedy broomrapes with a broad host spectrum respond better to the different exudates released by a wide range of crops and wild species than do non-weedy broomrapes, which have a narrow host spectrum and are more restricted to their host range. Root exudates of many plant species were active in stimulating germination of seeds of Orobanche and Phelipanche species for which they are not described as hosts, representing interesting examples of potential trap crops.

Authors+Show Affiliations

Institute for Sustainable Agriculture, CSIC, Córdoba, Spain.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19049987

Citation

Fernández-Aparicio, M, et al. "Recognition of Root Exudates By Seeds of Broomrape (Orobanche and Phelipanche) Species." Annals of Botany, vol. 103, no. 3, 2009, pp. 423-31.
Fernández-Aparicio M, Flores F, Rubiales D. Recognition of root exudates by seeds of broomrape (Orobanche and Phelipanche) species. Ann Bot. 2009;103(3):423-31.
Fernández-Aparicio, M., Flores, F., & Rubiales, D. (2009). Recognition of root exudates by seeds of broomrape (Orobanche and Phelipanche) species. Annals of Botany, 103(3), 423-31. https://doi.org/10.1093/aob/mcn236
Fernández-Aparicio M, Flores F, Rubiales D. Recognition of Root Exudates By Seeds of Broomrape (Orobanche and Phelipanche) Species. Ann Bot. 2009;103(3):423-31. PubMed PMID: 19049987.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Recognition of root exudates by seeds of broomrape (Orobanche and Phelipanche) species. AU - Fernández-Aparicio,M, AU - Flores,F, AU - Rubiales,D, Y1 - 2008/12/01/ PY - 2008/12/4/pubmed PY - 2009/3/6/medline PY - 2008/12/4/entrez SP - 423 EP - 31 JF - Annals of botany JO - Ann Bot VL - 103 IS - 3 N2 - BACKGROUND AND AIMS: The long co-existence of broomrapes and their hosts within the same environment has culminated in a strong adaptation and effective parasitism. As a first step of specialization in the parasitic process, seed receptors of parasitic plant species vary in their ability to recognize compounds released by their hosts. This work aims to investigate potential patterns for the reception requirements needed to activate germination within Orobanche and Phelipanche species. METHODS: Induction of the germination of seeds of nine Orobanche and Pheliphanche species by root exudates of 41 plant species was studied and subjected to biplot multivariate analysis. KEY RESULTS: A high level of specialization in root exudate recognition was found in Orobanche densiflora, O. gracilis and O. hederae, which germinated almost exclusively in contact with root exudates from the plants they infect in nature. At the opposite extreme, Phelipanche aegyptiaca, P. ramosa and O. minor were highly generalist, germinating when in contact with the root exudates of most plant species. Orobanche crenata, O. cumana and O. foetida showed intermediate behaviour. CONCLUSIONS: A universal germination stimulant for all broomrape species has not being identified to date. The synthetic stimulant GR24 is active against most of the weedy broomrape species, but fails with the non-weedy species tested in this study and with the very recent weedy species O. foetida. In addition, germination behaviour of broomrape species depends on the crop plant tested. Weedy broomrapes with a broad host spectrum respond better to the different exudates released by a wide range of crops and wild species than do non-weedy broomrapes, which have a narrow host spectrum and are more restricted to their host range. Root exudates of many plant species were active in stimulating germination of seeds of Orobanche and Phelipanche species for which they are not described as hosts, representing interesting examples of potential trap crops. SN - 1095-8290 UR - https://www.unboundmedicine.com/medline/citation/19049987/Recognition_of_root_exudates_by_seeds_of_broomrape__Orobanche_and_Phelipanche__species_ L2 - https://academic.oup.com/aob/article-lookup/doi/10.1093/aob/mcn236 DB - PRIME DP - Unbound Medicine ER -