@article{fdi:010071384,
  title = {{I}nfluence of environmental conditions and genetic background of {A}rabica coffee ({C}. arabica {L}) on leaf rust ({H}emileia vastatrix) pathogenesis},
  author = {{T}oniutti, {L}. and {B}reitler, {J}. {C}. and {E}tienne, {H}. and {C}ampa, {C}laudine and {D}oulbeau, {S}ylvie and {U}rban, {L}. and {L}ambot, {C}. and {P}inilla, {J}. {C}. {H}. and {B}ertrand, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{G}lobal warming is a major threat to agriculture worldwide. {B}etween 2008 and 2013, some coffee producing countries in {S}outh and {C}entral {A}merica suffered from severe epidemics of coffee leaf rust ({CLR}), resulting in high economic losses with social implications for coffee growers. {T}he climatic events not only favored the development of the pathogen but also affected the physiological status of the coffee plant. {T}he main objectives of the study were to evaluate how the physiological status of the coffee plant modified by different environmental conditions impact on the pathogenesis of {CLR} and to identify indicators of the physiological status able to predict rust incidence. {T}hree rust susceptible genotypes (one inbred line and two hybrids) were grown in controlled conditions with a combination of thermal regime ({TR}), nitrogen and light intensity close to the field situation before being inoculated with the rust fungus {H}emileia vastatrix. {I}t has been demonstrated that a {TR} of 27-22 degrees {C} resulted in 2000 times higher sporulation than with a {TR} of 23-18 degrees {C}. {I}t has been also shown that high light intensity combined with low nitrogen fertilization modified the {CLR} pathogenesis resulting in huge sporulation. {CLR} sporulation was significantly lower in the {F}1 hybrids than in the inbred line. {T}he hybrid vigor may have reduced disease incidence. {A}mong the many parameters studied, parameters related to photosystem {II} and photosynthetic electron transport chain components appeared as indicators of the physiological status of the coffee plant able to predict rust sporulation intensity. {T}aken together, these results show that {CLR} sporulation not only depends on the {TR} but also on the physiological status of the coffee plant, which itself depends on agronomic conditions. {O}ur work suggests that vigorous varieties combined with a shaded system and appropriate nitrogen fertilization should be part of an agro-ecological approach to disease control.},
  keywords = {{C}offea arabica ; coffee leaf rust ; biotic-abiotic interaction ; chlorophyll a fluorescence ; hybrid vigor},
  booktitle = {},
  journal = {{F}rontiers in {P}lant {S}cience},
  volume = {8},
  numero = {},
  pages = {2025 [12 ]},
  ISSN = {1664-462{X}},
  year = {2017},
  DOI = {10.3389/fpls.2017.02025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071384},
}