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| Zaccaro,María Cristina; Kato,Adriana; Zulpa,Gloria; Storni,Mónica Magdalena; Steyerthal,Noemí; Lobasso,Karina; Stella,Ana María. |
| Cyanobacteria produces bioactive compounds including plant growth regulators. Naphthalene acetic acid (NAA), a toxic substance, is a synthetic plant regulator used in micropropagation. The aim of this work was to evaluate morphogenetic and antioxidant effects produced by intra and extracellular substances from Scytonema hofmanni (Cyanobacteria) during the multiplication in vitro of Lilium alexandrae and to compare them to those produced by NAA. Intra and extracellular cyanobacterial products increased a) bulblets production reaching 83% and 78% of NAA effect, respectively; b) the bulblet diameter compared to NAA; and c) the bulblet survival due to the promotion of antioxidant activity measured as catalase, ascorbate peroxidase, and glutathione reductase... |
| Tipo: Journal article |
Palavras-chave: Ascorbate peroxidase; Bioactive substances; Bulb regeneration; Catalase; Cyanobacteria; Glutathione reductase; Lilium alexandrae; Scytonema hofmanni. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300007 |
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| Vasconcelos,Ana Carolina Feitosa de; Zhang,Xunzhong; Ervin,Erik H.; Kiehl,Jorge de Castro. |
| Water stress is one of the most important environmental factors inducing physiological changes in plants, such as decrease in the water potential of the cells, the stomatal closure; and the development of oxidative processes mediated by reactive oxygen species (ROS). Antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) are efficient scavengers of ROS. The aim of this research was to examine how the application of biostimulant based on humic substances and aminoacids may affect activity levels of SOD, CAT, and APX of maize and soybean plants under well-watered or drought stress conditions. Pots (4.5 L) were filled with a Typic Hapludult soil where the biostimulants doses were applied. It was taken leaf samples in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Superoxide dismutase; Catalase; Ascorbate peroxidase; Water status. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300015 |
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| Caverzan,Andréia; Passaia,Gisele; Rosa,Silvia Barcellos; Ribeiro,Carolina Werner; Lazzarotto,Fernanda; Margis-Pinheiro,Márcia. |
| When plants are exposed to stressful environmental conditions, the production of Reactive Oxygen Species (ROS) increases and can cause significant damage to the cells. Antioxidant defenses, which can detoxify ROS, are present in plants. A major hydrogen peroxide detoxifying system in plant cells is the ascorbate-glutathione cycle, in which, ascorbate peroxidase (APX) enzymes play a key role catalyzing the conversion of H2O2 into H2O, using ascorbate as a specific electron donor. Different APX isoforms are present in distinct subcellular compartments, such as chloroplasts, mitochondria, peroxisome, and cytosol. The expression of APX genes is regulated in response to biotic and abiotic stresses as well as during plant development. The APX responses are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbate peroxidase; Antioxidant system; Reactive oxygen species; Abiotic stress; Mutant plants. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600016 |
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| 何, 寧; 太野, 友和; 小嶋, 道之; He, Ning; Futono, Tomokazu; Kojima, Michiyuki. |
| 出芽期の低温に強いアカネダイナゴンと出芽期の低温に弱い斑小粒系－１の実生を１５℃で低温処理 した時に，両品種の抗酸化酵素活性に違いがあるのかどうかを調べた。アカネダイナゴンの緑化実生を 低温処理すると，APX 活性やCAT 活性は上昇したが，斑小粒系－１のCAT 活性は顕著に低下した。しか し，黄化実生に4000Lx の光照射下で低温処理すると，斑小粒系－１のCAT 活性は上昇したが，アカネダ イナゴンのそれはほとんど変化しなかった。斑小粒系－１の緑化実生は，光のある状態で低温を受ける と代謝が乱れ，CAT 活性が低下して細胞内の過酸化水素が過剰となり，細胞障害を起こすのかもしれない｡ Seedlings of 2 varieties of Adzuki beans – the Buchisyouryukei-1 variety, which is weak under low temperatures in the budding stage, and the Akanedainagon variety, which is resistant to low temperatures in the budding stage – were investigated to clarify whether differences in the antioxidative enzyme activity are associated with exposure to low temperatures (15ºC). APX and CAT activity rose when greenish Akanedainagon seedlings were exposed to low temperatures,... |
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Palavras-chave: アズキ; 実生; 低温処理; SOD; APX; CAT; Adzuki; Seedling; Low-temperature; Superoxide disumutase; Ascorbate peroxidase; Catalase . |
| Ano: 2005 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/83 |
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