| Texto completo | |
| Autor(es): |
Bison, Josiane Valeria
[1, 2]
;
Cardoso-Gustavson, Poliana
[3]
;
de Moraes, Regina Maria
[1]
;
Pedrosa, Giselle da Silva
[3, 4]
;
Cruz, Luciano Soares
[3]
;
Freschi, Luciano
[5]
;
de Souza, Silvia Ribeiro
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Nucleo Pesquisa Ecol, Inst Bot, Ave Miguel Stefano 3687, BR-04301902 Sao Paulo, SP - Brazil
[2] Inst Bot, Programa Posgrad Biodiversidade Vegetal & Meio Am, Ave Miguel Stefano 3687, BR-04301902 Sao Paulo, SP - Brazil
[3] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil
[4] Univ Fed ABC, Programa Posgrad Biotecnociencias, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil
[5] Univ Sao Paulo, Inst Biociencia, Dept Bot, Rua Matao 277, BR-05508090 Butant, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Environmental Science and Pollution Research; v. 25, n. 4, p. 3840-3848, FEB 2018. |
| Citações Web of Science: | 8 |
| Resumo | |
The emission profile of volatile organic compounds (VOCs) and nitric oxide (NO) in young and mature leaves of Croton floribundus was assessed in plants exposed to filtered air (FA) and ozone-enriched filtered air (FA+O-3). After the period of exposure, leaves were enclosed in polyethylene terephthalate bags and VOCs were collected in young and mature leaves. Both young and mature leaves constitutively emitted the same VOC, but the concentrations were higher in young leaves. O-3 exposure induced the emission of sesquiterpenes (mainly beta-caryophyllene) known as antioxidant compounds that may scavenge O-3. Young leaves were the highest emitters of sesquiterpenes. O-3 induced a rapid accumulation of NO in different tissues and leaf developmental stages; this accumulation was marked in palisade and spongy parenchyma cells in young and mature leaves, respectively. O-3 altered the levels of the signaling compound methyl salicylate (MeSA). Moreover, our data showed that NO together with VOC emissions, such as geranyl acetate, alpha-cadiene, trans-farnesol, cis-beta-farnesene, and MeSA, participate of plant defense mechanisms against the oxidative damage caused by O-3. (AU) | |
| Processo FAPESP: | 12/11663-8 - Ação do ozônio atmosférico nas múltiplas funções dos compostos orgânicos voláteis de plantas nativas |
| Beneficiário: | Silvia Ribeiro de Souza |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |