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| Bispo,Wilka Messner da Silva; Araujo,Leonardo; Moreira,Wiler Ribas; Silva,Leandro de Castro; Rodrigues,Fabrício Ávila. |
| ABSTRACT Caused by the vascular fungus Ceratocystis fimbriata, mango wilt is considered to be one of the most serious threats in mango-producing regions worldwide. However, changes in leaf gas exchange level and the mechanisms underlying host responses to this fungal infection remain poorly described. This study aimed to evaluate potential changes in the leaf gas exchange of different mango cultivars (Ubá, Espada, Haden and Tommy Atkins) in response to two Brazilian isolates of C. fimbriata (CEBS15 and MSAK16) to non-invasively assess cultivar variability in relation to the basal level of resistance to mango wilt. Both isolates, regardless of the cultivar, caused reductions in stomatal conductance and, thus, a reduction in CO2 assimilation via diffusive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mangifera indica; Mango wilt; Photosynthesis; Vascular disease. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200150 |
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| Moreira,Wiler Ribas; Bispo,Wilka Messner da Silva; Rios,Jonas Alberto; Debona,Daniel; Nascimento,Clístenes Williams Araújo; Rodrigues,Fabrício Ávila. |
| Brown spot (BS), caused by the fungus Bipolaris oryzae, is one of the most important diseases contracted by rice. We investigated the effect of magnesium (Mg) on the development of BS, caused by Bipolaris oryzae, and the effects of disease development on the photosynthetic performance of rice (Oryza sativa L.) plants (cv. Metica-1) grown in nutrient solutions containing 0.25 or 4.0 mM of Mg. Assessments of BS severity, leaf Mg and pigment concentrations (total chlorophylls and carotenoids), were carried out at 120 h after inoculation, in addition to gas exchange parameters,. Higher leaf concentration of Mg was observed in plants supplied with 4.0 mM Mg than in those supplied with 0.25 mM. The increase in leaf Mg was accompanied by a decrease in BS... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Foliar disease; Macronutrient; Photosynthesis; Plant nutrition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328 |
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