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Differential defense responses of tropical grasses to Mahanarva spectabilis (Hemiptera: Cercopidae) infestation
- Source :
- Anais da Academia Brasileira de Ciências, Vol 93, Iss 3 (2021), Anais da Academia Brasileira de Ciências, Volume: 93, Issue: 3, Article number: e20191456, Published: 09 AUG 2021, Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice), Empresa Brasileira de Pesquisa Agropecuária (Embrapa), instacron:EMBRAPA, Anais da Academia Brasileira de Ciências v.93 n.3 2021, Anais da Academia Brasileira de Ciências, Academia Brasileira de Ciências (ABC), instacron:ABC
- Publication Year :
- 2021
- Publisher :
- Academia Brasileira de Ciências, 2021.
-
Abstract
- The spittlebugs Mahanarva spectabilis economically challenges cattle production of neotropical regions, due to its voracious feeding on tropical grasses. Here, we evaluated biochemical responses of the interaction between M. spectabilis and the widely cultivated tropical grasses Brachiaria spp. (i.e., brizantha and decumbens) and elephant grasses (cvs. Roxo de Botucatu and Pioneiro), regarding lipoxygenases, protease inhibitors, phytohormones, and proteolytic activities in the midgut of M. spectabilis. The M. spectabilis-infested grasses increased lipoxygenases activity, except for cv. Pioneiro. The levels of the phytohormones jasmonic and abscisic acids were similarly low in all genotypes and increased under herbivory. Furthermore, salicylic acid concentration was constitutively higher in Brachiaria sp., increasing only in spittlebug-infested B. decumbens. M. spectabilis infestations did not induce increases of protease inhibitors in any forage grass type. The trypsin activity remained unaltered, and the total proteolytic activity increased only in B decumbens-fed insects. Our findings revealed that most forage grasses exposed to spittlebugs activate the lipoxygenases pathway, resulting in increased abscisic and jasmonic acids. However, greater amounts of these hormones do not induce protease inhibitory activity in response to spittlebug attack. This knowledge certainly helps to guide future projects aiming at reducing the impact of spittlebugs on forage production. Made available in DSpace on 2021-09-15T12:00:27Z (GMT). No. of bitstreams: 1 Differential-defense.pdf: 966114 bytes, checksum: 1aff97283378e2d95870009591ee6794 (MD5) Previous issue date: 2021
- Subjects :
- Pennisetum
Cigarrinha das Pastagens
Genotype
medicine.medical_treatment
Science
Brachiaria
Forage
midgut
medicine.disease_cause
Pastagem
Hemiptera
chemistry.chemical_compound
stress
Infestation
Botany
medicine
Animals
Hormônio
Herbivory
Herbivore
Multidisciplinary
Protease
biology
Intestino
food and beverages
Midgut
protease
biology.organism_classification
Hormones
Insects
chemistry
Inseto
Cercopidae
Cattle
insect
Salicylic acid
Subjects
Details
- Language :
- English
- ISSN :
- 16782690
- Volume :
- 93
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Anais da Academia Brasileira de Ciências
- Accession number :
- edsair.doi.dedup.....e5b7e802f62dcb35ba4fd5a1e092535f