Publications des scientifiques de l'IRD

Calatayud Paul-André, Njuguna E., Mwalusepo S., Gathara M., Okuku G., Kibe A., Musyoka B., Williamson David, Ong'amo G., Juma G., Johansson T., Subramanian S., Gatebe E., Le Rü Bruno. (2016). Can climate-driven change influence silicon assimilation by cereals and hence the distribution of lepidopteran stem borers in East Africa ?. Agriculture Ecosystems and Environment, 224, p. 95-103. ISSN 0167-8809.

Titre du document
Can climate-driven change influence silicon assimilation by cereals and hence the distribution of lepidopteran stem borers in East Africa ?
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000375809900011
Auteurs
Calatayud Paul-André, Njuguna E., Mwalusepo S., Gathara M., Okuku G., Kibe A., Musyoka B., Williamson David, Ong'amo G., Juma G., Johansson T., Subramanian S., Gatebe E., Le Rü Bruno
Source
Agriculture Ecosystems and Environment, 2016, 224, p. 95-103 ISSN 0167-8809
In East Africa, lepidopteran stemborers such as Chilo partellus and Busseola fusca are major constraints to production of maize, which is the main staple food crop in the region. Cereals depend on silicon (Si) based defences to fight off herbivores. Using attitudinal ranges in the East African highlands as ecological surrogates for inferring climate change, it was shown that Si concentrations in soil and maize decreased with altitude. This was attributed, in part, to low temperatures at high altitudes, which negatively affected Si assimilation by maize. Experiments showed that B. fusca was more susceptible to Si than C. partellus. Hence the predominance of B. fusca in the highlands and of C. partellus in the lowlands could be partly explained by attitudinal differences in Si concentrations in maize plants. Therefore, a rise in temperature due to climate change should enhance the plants' Si assimilation and as a result C partellus might move into the higher altitudes and increasingly displace B. fusca.
Plan de classement
Sciences du milieu [021] ; Sciences du monde végétal [076]
Description Géographique
KENYA ; TANZANIE
Localisation
Fonds IRD [F B010066907]
Identifiant IRD
fdi:010066907
Contact