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| Veasey,Elizabeth Ann; Piotto,Fernando Angelo; Nascimento,Wellington Ferreira do; Rodrigues,Jucelene Fernandes; Mezette,Thiago Fonseca; Borges,Aline; Biguzzi,Felipe Almeida; Santos,Fernanda Raquel Camilo dos; Sobierajski,Graciela da Rocha; Recchia,Gustavo Henrique; Mistro,Julio César. |
| A evolução das plantas cultivadas, que teve início há cerca de 13.000 anos, está sujeita aos mesmos processos evolutivos naturais, aliada à ação do homem de forma consciente ou inconsciente, levando à domesticação. Nesta revisão, são apresentados os principais fatores evolutivos, tais como mutação, hibridação, migração, seleção e deriva genética, que, de alguma maneira, estão envolvidos com a origem, evolução e domesticação de plantas cultivadas. São apresentados também exemplos de como esses processos influenciaram na diversidade intra e interespecífica de plantas cultivadas, com o aparecimento de novas variedades ou mesmo de novas espécies. De modo geral, tais processos atuaram na ampliação, na manutenção, bem como na redução da variabilidade genética... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Domesticação de plantas; Mutação; Hibridação; Migração; Seleção; Deriva genética. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000700018 |
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| Piotto,Fernando Angelo; Batagin-Piotto,Katherine Derlene; Almeida,Marcílio de; Oliveira,Giancarlo Conde Xavier. |
| Xenia, the transmission of traits from the pollinizer to the female's tissues, is a phenomenon hitherto unknown in tomatoes. Here, we describe xenia effects on the seeds and fruits of Solanum lycopersicum, the tomato, elicited by S. galapagense. The wild tomatoes, such as S. galapagense, have highly pilose fruit surface and minute seeds, unlike the domesticated species. Crossings between S. galapagense (pollinizer) and two large-seeded, glabrous cultivars of S. lycopersicum (females) tested the former's ability to raise the trichome density and trichome-to-1000-cell ratio and to reduce the seed weight in the latter's fruits. Selfed fruits of the two cultivars, Micro-Tom and Pusa Ruby, were compared to the crossed fruits. The pollen of S. galapagense was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hormones; Pollination; Microscopy; Wild relative. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000200007 |
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| Carvalho,Rogério Falleiros; Piotto,Fernando Angelo; Schmidt,Daiana; Peters,Leila Priscila; Monteiro,Carolina Cristina; Azevedo,Ricardo Antunes. |
| Seed priming with hormones has been an efficient method for increasing seed vigor as well as seedling growth under stressful conditions. These responses have in the past been attributed to the activation of antioxidant systems in a range of crops. The results described in this work show that hormonal priming with methyl jasmonate, salicylic acid or CEPA (chloroethylphosphonic acid), an ethylene (ET) releaser, does not induce the antioxidant activity of superoxide dismutase, catalase, ascorbate peroxidase or glutathione reductase in maize seedlings subjected to salt stress. The enhanced biomass of maize seedlings under salt stress that was observed only from ET priming indicates that the stress tolerance in maize from ethylene priming is a fundamental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Antioxidant systems; Hormonal pretreatment; Salinity; Seedling growth. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500014 |
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| Kato,Fabiana Hibary; Carvalho,Marcia Eugenia Amaral; Gaziola,Salete Aparecida; Piotto,Fernando Angelo; Azevedo,Ricardo Antunes. |
| ABSTRACT: In general, the effects of Cadmium (Cd) on crop quality are evaluated solely by Cd accumulation in the edible plant parts; thus, the potential effects on several nutritional features are not often taken into account. This study evaluated Cd effects on the enzymatic activities of lysine (Lys) metabolism, storage protein and amino acid profile in maize. Stress parameters were also assessed. In vegetative organs, Cd was accumulated in the following decreasing order: roots > stems > leaves. Cadmium accumulation in grains decreased at grain maturity (from 0.25 to 0.07 µg g−1 DW). In leaves, neither hydrogen peroxide content nor superoxide dismutase, catalase, ascorbate peroxide and guaiacol peroxidase activities did not change in Cd-treated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Aspartate kinase; Corn; Dihydrodipicolinate synthase; Heavy metal. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101300 |
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| Souza,Lucas Anjos; Piotto,Fernando Angelo; Nogueirol,Roberta Corrêa; Azevedo,Ricardo Antunes. |
| Soil contamination by heavy metals is a challenge faced by many countries, and engineering technologies to solve this problem are expensive and can cause negative impacts on the environment. One way to minimise the levels of heavy metals in the soil is to use plants that can absorb and accumulate heavy metals into harvestable parts, a process called phytoextraction. Typical plant species used in research involving phytoextraction are heavy metal hyperaccumulators, but plants from this group are not good biomass producers and grow more slowly than most species; thus, they have an important role in helping scientists understand the mechanisms involved in accumulating high amounts of heavy metals without developing symptoms or dying. However, because of their... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000400010 |
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