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| Registros recuperados: 12 | |
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| Scorza,Livia C.T.; Dornelas,Marcelo Carnier. |
| The flowers of the species belonging to the genus Passiflorashow a range of features that are thought to have arisen as adaptations to different pollinators. Some Passiflora species belonging to the subgenus Decaloba sect. Xerogona, show touch-sensitive motile androgynophores. We tested the role of auxin polar transport in the modulation of the androgynophore movement by applying auxin (IAA) or an inhibitor of auxin polar transport (NPA) in the flowers. We recorded the movement of the androgynophore during mechano-stimulation and analyzed the duration, speed, and the angle formed by the androgynophore before and after the movement, and found that both IAA and NPA increase the amplitude of the movement in P. sanguinolenta. We hypothesize that auxin might... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passiflora; Androgynophore; IAA; NPA; Thigmotropism. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300301 |
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| Amaral,Lourdes Isabel Velho do; Santos,Henrique P.; Rossatto,Davi Rodrigo; Buckeridge,Marcos Silveira. |
| The cotyledons of Hymenaea courbaril store large amounts of xyloglucan, a cell wall polysaccharide that is believed to serve as storage for the period of seedling establishment. During storage mobilisation, xyloglucan seems to be degraded by a continuous process that starts right after radicle protrusion and follows up to the establishment of photosynthesis. Here we show evidence that events related to the hydrolases activities and production (α-xylosidase, β-galactosidase, β-glucosidase and xyloglucan endo-β-transglucosilase) as well as auxin, showed changes that follow the diurnal cycle. The period of higher hydrolases activities was between 6pm and 6am, which is out of phase with photosynthesis. Among the enzymes, α-xilosidase seems to be more important... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enzyme activity; IAA; Α-xylosidase; XTH; Xyloglucan. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000400008 |
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| OLIVEIRA,Danyllo Amaral de; FERREIRA,Solange da Cunha; CARRERA,Daiany Larissa Ribeiro; SERRÃO,Cleyson Pantoja; CALLEGARI,Daihany Moraes; BARROS,Nicolle Louise Ferreira; COELHO,Francinilson Meireles; SOUZA,Cláudia Regina Batista de. |
| ABSTRACT Despite advances in the identification and characterization of endophytic bacteria in various plant species worldwide, little is known about such microorganisms in plants from the Amazon region. Previous studies reported that Piper tuberculatum endophytic Pseudomonas (isolates Pt12 and Pt13, identified as Pseudomonas putida and Pseudomonas sp., respectively) were able to inhibit the in vitro growth of Fusarium solani f. sp. piperis, which causes root rot in black pepper (Piper nigrum), and that Pt13 promoted the growth of P. nigrum. Therefore, the aim here was to characterize these bacteria regarding their ability to produce plant growth-promoting substances [siderophores, indol acetic acid (IAA) and soluble phosphate]. Chrome azurol S assays were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant growth-promoting bacterial endophytes; IAA; Siderophores; Phosphate solubilization. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000100010 |
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| Dawood, Mona Gergis. |
| The physiological effect of melatonin, IAA and their precursor (tryptophan) as seed priming on quantity and quality of chickpea plants was investigated during two growing seasons of 2013/2014 and 2014/2015 under sandy soil conditions at the Research and Production Station, National Research Centre, Nubaria Province, Behaira Governorate, Egypt. Data show that melatonin treatments showed the most pronounced effect on vegetative growth parameters followed by IAA and tryptophan treatments. The highest significant increase in dry weight of shoot/plant was achieved by melatonin treatments at 0.5 and 1.0mM. Moreover, melatonin treatments at 0.25 and 0.5 mM were the most pronounced treatments caused the highest significant increase in total photosynthetic pigments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Melatonin; IAA; Tryptophan; Chickpea; Sandy soil. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4377 |
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| Giongo,Adriana; Beneduzi,Anelise; Gano,Kelsey; Vargas,Luciano Kayser; Utz,Laura; Passaglia,Luciane Maria Pereira. |
| Microorganisms that live inside and around a plant can supply it with essential substances, such as phytohormones and essential nutrients. The present investigation aimed to isolate and characterize the phyllosphere, the endophytic, and the water tank bacteria associated with Vriesea gigantea and Tillandsia aeranthos. The bacteria were tested for siderophore and indole-3-acetic acid (IAA) production, phosphate solubilization, and presence of the nif H gene. Genetic diversity of the bacterial isolates was evaluated by rep-PCR. Sixty-eight bacterial strains were isolated from 3 different microhabitats of V. gigantea and from 2 microhabitats of T. aeranthos bromeliad plants. Gram-positive, spore-forming bacilli comprised most bacterial isolates. All isolates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliads; PGPB; Diazotrophic bacteria; Water tank; Siderophore; IAA. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300080 |
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| Castro,Renata Assis; Dourado,Manuella Nóbrega; Almeida,Jaqueline Raquel de; Lacava,Paulo Teixeira; Nave,André; Melo,Itamar Soares de; Azevedo,João Lucio de; Quecine,Maria Carolina. |
| ABSTRACT Mangroves are ecosystems located in the transition zone between land and sea that serve as a potential source of biotechnological resources. Brazil's extensive coast contains one of the largest mangrove forests in the world (encompassing an area of 25,000 km2 along all the coast). Endophytic bacteria were isolated from the following three plant species: Rhizophora mangle, Laguncularia racemosa and Avicennia nitida. A large number of these isolates, 115 in total, were evaluated for their ability to fix nitrogen and solubilize phosphorous. Bacteria that tested positive for both of these tests were examined further to determine their level of indole acetic acid production. Two strains with high indole acetic acid production were selected for use as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic bacteria; IAA; Phosphorus and plant growth promoting bacteria (PGPB). |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100059 |
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| Peng,Yanjie; He,Yanhui; Wu,Zhansheng; Lu,Jianjiang; Li,Chun. |
| The plant growth-promoting rhizobacterial strain Pseudomonas putida Rs-198 was isolated from salinized soils from Xinjiang Province. We optimized the composition of the low-cost medium of P. putida Rs-198 based on its bacterial concentration, as well as its phosphate-dissolving and indole acetic acid (IAA)-producing capabilities using the response surface methodology (RSM), and a mathematical model was developed to show the effect of each medium component and its interactions on phosphate dissolution and IAA production. The model predicted a maximum phosphate concentration in medium containing 63.23 mg/L inorganic phosphate with 49.22 g/L corn flour, 14.63 g/L soybean meal, 2.03 g/L K2HPO4, 0.19 g/L MnSO4 and 5.00 g/L NaCl. The maximum IAA concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudomonas putida Rs-198; Low-cost medium; Phosphorus-dissolving; IAA; Response surface methodology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400013 |
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| Registros recuperados: 12 | |
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