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| Gabriel,André; Resende,Juliano TV; Marodin,Josué C; Matos,Rafael de; Zeist,André R; Maciel,Cleber Daniel G. |
| ABSTRACT Brazil’s low garlic productivity is attributed, mainly to the lateral shoot growth, a physiological anomaly characterized by early lateral shoot growth of cloves in noble group garlic cultivars. Considering the aforementioned information, the aim was to evaluate the occurrence of lateral shoot growth and productivity characteristics in garlic plants, cv. Chonan, subject to herbicide chemical stress. In order to do so, an experiment was conducted in outlining randomized blocks in a 3x5 factorial scheme, constituted by three herbicides (paraquat 500 g ha-1; ammonium gluphosinate 400 g ha-1 and glyphosate 720 g ha-1) and five subdoses (0, 5, 10, 15 and 20% of the minimum recommended dose of each herbicide). The electron transport rates (ETR) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum; Herbicide; Electron transport rate. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100041 |
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| Morelle, Jerome; Schapira, Mathilde; Claquin, Pascal. |
| Exopolysaccharides (EPS) play an important role in the carbon flux and may be directly linked to phytoplankton and microphytobenthos production, most notably in estuarine systems. However the temporal and spatial dynamics of estuarine EPS are still not well understood, nor how primary productivity triggers this variability at these different scales. The aim of this study was to investigate the primary productivity of phytoplankton and EPS dynamics in the Seine estuary over a tidal cycle in three different haline zones over two contrasted seasons. The other objectives was to investigate the origin of pools of soluble carbohydrates (S-EPS) and transparent exopolymeric particles (TEP) in phytoplankton, microphytobenthos or other compartments. High frequency... |
| Tipo: Text |
Palavras-chave: Phytoplankton; Microphytobenthos; PAM fluorometer; Electron transport rate. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00400/51132/51898.pdf |
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| Gonçalves,José Francisco de Carvalho; Santos Júnior,Ulysses Moreira dos; Silva,José Ferreira da; Arruda,Murilo Rodrigues de; Bonates,Luiz Carlos de Matos; Fernandes,Andreia Varmes. |
| The objective of this work was to analyze gas exchange, photosynthetic characteristics, photochemical efficiency of photosystem II and anatomical characteristics of young plant leaves of two guarana (Paullinia cupana) clones (BRS-CG372RC and BRS-CG611RL) growing under open field. The variables of gas exchange and fluorescence of chlorophyll a were evaluated in mature leaves. The values of photosynthesis and transpiration found for BRS-CG372RC were 27% greater and 80% lesser than values found for BRS-CG611RL, respectively. The values of stomatal conductance found for the clones BRS-CG372RC and BRS-CG611RL were in the order of 224 and 614 mmol mm-2 s-1, respectively. The values of photorespiration, rate of carboxylation and rate electron transport were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paullinia cupana; Photosynthesis; Photochemical efficiency of photosystem II; Electron transport rate; Water use efficiency; Stomatal anatomy. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000300004 |
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| Redha,A; Suleman,P; Al-Hasan,R; Afzal,M. |
| Cococarpus lancifolius Engl. grows wild in Djibouti, Somalia and East Africa, and South Asia. The species was introduced into Kuwait, where it is exposed to several stresses: oil pollution, salinity, high temperature and harsh climatic conditions. These conditions are prevalent in its semi-arid environment. In this study, the impact of salinity (2, 6 and 10%), temperature (20, 30 and 40 °C), polyethylene glycol (10, 30 and 60%) and drought has been investigated on C. lancifolius. Proline (Pro) accumulation (5.5 ± 0.03 µg/g dry weight; p=0.05-0.005), protein (16.47 ± 0.052 mg/g; p=0.001), free amino acids (10.92 ± 0.082 mg/g; p=0.006) and lipids (116.05 ± 2.17 µg/g; p=0.05) were measured in plants irrigated with 60% polyethylene glycol (PEG) for 6 days.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conocarpus lancifolius; Drought; Electron transport rate; Environmental stress; Salinity; Temperature; Photosynthesis. |
| Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000200008 |
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| ARALDI,R.; CORNIANI,N.; TROPALDI,L.; GIROTTO,M.; BELAPART,D.; SIMÕES,P.S.; VELINI,E.D.. |
| Chlorophyll fluorescence is currently used as a rapid diagnostic and nondestructive method to detect and quantify damage on the photosynthetic apparatus of leaves on weeds, crops and ornamental/coniferous trees in response to both environmental stress and herbicides. This study aimed to evaluate chlorophyll fluorescence in guanandi plants (Calophyllum brasiliense) after application of different postemergence herbicides. The experiment was performed in a completely randomized design, with six treatments (control, bentazon, sulfentrazone, isoxaflutole, atrazine and glyphosate) and five replications. The herbicide treatments were applied with a stationary sprayer, and electron transport rate (ETR) was subsequently analyzed with OS5p Multi-Mode Chlorophyll... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electron transport rate; Bentazon; Sulfentrazone; Isoxaflutole; Atrazine; Glyphosate. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100077 |
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| KRENCHINSKI,F.H.; CESCO,V.J.S.; CASTRO,E.B.; CARBONARI,C.A.; VELINI,E.D.. |
| ABSTRACT: With the possibility of using ammonium glufosinate in corn, studies on its association with other herbicides are essential. The aim of this study was to assess weed control and herbicide selectivity in association with ammonium glufosinate in corn containing the pat and cp4-epsps genes. The experiment was carried out under field conditions in two sites in a randomized block design with four replications. Treatments consisted of ammonium glufosinate, glyphosate, ammonium glufosinate + glyphosate, ammonium glufosinate + nicosulfuron, ammonium glufosinate + atrazine, ammonium glufosinate + tembotrione, ammonium glufosinate + mesotrione, ammonium glufosinate + carfentrazone ethyl, ammonium glufosinate + bentazon, ammonium glufosinate + 2,4-D, control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia accumulation; Phosphinothricin; Electron transport rate; Herbicide resistance; Zea mays. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100241 |
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| SIMÕES,P.S.; CARBONARI,C.A.; NASCENTES,R.F.; STASIEVSKI,A.; VELINI,E.D.. |
| ABSTRACT For the successful execution of chemical weed control in sugarcane crop, the selectivity of herbicides is a factor of great importance to maximize crop yield. Each cultivar may respond differently to the same herbicide in the same dose, and selectivity is not only determined by the visual presence or absence of phytotoxicity. Thus, the aim of this study was to evaluate the effects of herbicides amicarbazone, tebuthiuron, and diuron + hexazinona on the electron transport rate in photosystem II (ETR), along with the development and yield of sugarcane cultivars RB867515, CTC 4, CTC 9, and CTC 17 in greenhouse, and field conditions. Under greenhouse conditions ETR was assessed by a portable fluorometer, aa well as dry weight and phytotoxicity of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amicarbazone; Tebuthiuron; Diuron; Hexazinona; Electron transport rate; Saccharum spp. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400803 |
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