RHIZO-INSECT · Multidisciplinary approach to study effects of beneficial rhizobacteria on induced plant defences to abovegroung herbivorous insects
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2009-07-01 → 2011-06-30
- Финансиране от ЕС
- 169 425 €
- Участници
- 1
- Схема
- MC-IEF
Линиите свързват координатора с партньорите.
Накратко на български
Полезните бактерии в корените на растенията влияят върху защитата им срещу насекоми, като например затрудняват развитието на гъсениците, но улесняват това на листните въшки. Тези процеси помагат за разработването на устойчиви методи за борба с вредителите без химически пестициди.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Multidisciplinary approach to study effects of beneficial rhizobacteria on induced plant defences to abovegroung herbivorous insects
See the attached document for the final publishable summary report Research objectives, main results and conclusions: 1) the preference of generalist and specialist herbivores for the host plant Our experiments show that the presence of rhizobacteria has no effects on herbivore preference. 2) the performance of generalist and specialist herbivores when they are developing on the plant, by measuring growth and development rate The performance of specialist herbivores was not affected by the presence of rhizobacteria. In contrast, rhizobacteria had a differential effect on generalist herbivores. Rhizobacteria induced systemic resistance against leaf chewers (the caterpillars Spodoptera exigua and Mamestra brassicae) whereas the colonization by rhizobacteria induced systemic susceptibility to phloem feeders (in this case the aphid Myzus persicae). 3) the attraction of parasitoids to herbivore-infested plants (indirect defences) The colonization by rhizobacteria triggers a strong modification in the plant, and such modification interferes with the host recognition by aphid parasitoids. 4) the composition of volatiles emitted by host plants, which can trigger the parasitoids behaviour The composition of the volatiles has been analysed and the results show that after rhizobacteria colonization of the roots, the volatile profile induced by herbivores is affected compared to plants without rhizobacteria colonization of the roots. These results show that plant growth promoting rhizobacteria that occur in the soil can affect the performance of insects on the plant's shoot. It will be important to further investigate this so as to allow for optimal exploitation in durable pest control strategies that do not rely on chemical pesticides but on a combination of biological pest management practices. This will be important for plant growth promoting rhizobacteria to become valuable components of Integrated Pest Management.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Plants are members of complex communities and they interact with other plants, insects and microbes. These interactions have a high economic impact in agriculture, like is the case of pests and pathogens attacking a certain crop. Traditionally such interactions have been study one-by-one, but recently a high number of investigations are focused in the study of the relationships in a wider context. In the context of Integrated Pest Management, the use of strategies that induce plant resistance is a very promising strategy since it can be more effective than the use of pesticides in some cases The use of rhizobacteria is one method to induce systemic resistance in plants, as well as to promote plant growth. Induced defences comprise direct defences such as secondary metabolites and protease inhibitors that negatively affect herbivore growth and survival. And they also comprise indirect defences such as herbivore-induced plant volatiles and herbivore-induced extrafloral nectar that enhance the effectiveness of natural enemies of herbivores, such as parasitoids or predators. These mechanisms are providing plants two ways of defence against insect pests, and in the context of integrated pest management where natural enemies are frequently released, they can be very effective for pest control. It is essential to understand the mechanisms that are involved in these interactions in order to apply this strategy to the different plant-insect interactions.
Оригинален текст от CORDIS (на английски).
Участници
- WAGENINGEN UNIVERSITY · WageningenКоординаторНидерландия
Връзки
Данни: CORDIS, © Европейски съюз