RT Journal Article
T1 The Effect of "Orobanche crenata" infection severity in faba bean, field pea, and grass pea productivity
A1 Fernández Aparicio, Mónica
A1 Flores Gil, Fernando
A1 Rubiales Olmedo, Diego
AB Broomrape weeds (Orobanche and Phelipanche spp.) are root holoparasites that feedoff a wide range of important crops. Among them, Orobanche crenata attacks legumescomplicating their inclusion in cropping systems along the Mediterranean area and WestAsia. The detrimental effect of broomrape parasitism in crop yield can reach up to 100%depending on infection severity and the broomrape-crop association. This work providesfield data of the consequences of O. crenata infection severity in three legume crops,i.e., faba bean, field pea, and grass pea. Regression functions modeled productivitylosses and revealed trends in dry matter allocation in relation to infection severity.The host species differentially limits parasitic sink strength indicating different levels ofbroomrape tolerance at equivalent infection severities. Reductions in host abovegroundbiomass were observed starting at low infection severity and half maximal inhibitoryperformance was predicted as 4.5, 8.2, and 1.5 parasites per faba bean, field pea, andgrass pea plant, respectively. Reductions in host biomass occurred in both vegetativeand reproductive organs, the latter resulting more affected. The increase of resourcesallocated within the parasite was concomitant to reduction of host seed yield indicatingthat parasite growth and host reproduction compete directly for resources within a hostplant. However, the parasitic sink activity does not fully explain the total host biomassreduction because combined biomass of host–parasite complex was lower than thebiomass of uninfected plants. In grass pea, the seed yield was negligible at severitieshigher than four parasites per plant. In contrast, faba bean and field pea sustainedlow but significant seed production at the highest infection severity. Data on seed yieldand seed number indicated that the sensitivity of field pea to O. crenata limited theproduction of grain yield by reducing seed number but maintaining seed size. In contrast,the size of individual parasites was not genetically determined but dependent on the hostspecies and resource availability as a consequence of competition between parasites atincreasing infection severities.  [This Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission.]
PB Frontiers Media
SN 1664-462X
YR 2016
FD 2016
LK http://hdl.handle.net/10272/12683
UL http://hdl.handle.net/10272/12683
LA eng
NO Fernández Aparicio, M., Flores Gil, F., Rubiales, D.: "The Effect of "Orobanche crenata" infection severity in faba bean, field pea, and grass pea productivity". Frontiers in Plant Science. Vol. 7, art. 1409, (2016). DOI: 10.3389/fpls.2016.01409
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jun 2026