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| Frosi,Gabriella; Harand,Wolfgang; Oliveira,Marciel Teixeira de; Pereira,Silvia; Cabral,Simone Pereira; Montenegro,Abelardo Antônio de Assunção; Santos,Mauro Guida. |
| ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll fluorescence; Climate changes; Gas exchange; Semiarid; Water deficit. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200153 |
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| Santos,Orlando Oliveira; Falcão,Hiram; Antonino,Antônio Celso Dantas; Lima,José Romualdo Souza; Lustosa,Bruno Melo; Santos,Mauro Guida. |
| O presente estudo avaliou o desempenho ecofisiológico das espécies Zea mays (milho), Sorghum bicolor (sorgo) e Brachiaria decumbens (braquiária) sob condições de déficit hídrico em casa de vegetação. O potencial hídrico foliar, trocas gasosas, fluorescência da clorofila a e variáveis bioquímicas do metabolismo fotossintético foram avaliados no máximo estresse e na reidratação. Aos 90 dias após a emergência e sob 21 dias com suspensão da irrigação o milho apresentou a maior redução do potencial hídrico (248%), condutância estomática (87%) e fotossíntese (53%) quando comparado às plantas bem hidratadas. O sorgo apresentou redução de 212%, 42% e 26%, enquanto a braquiária mostrou valores menores em 105%, 36% e 31%, respectivamente para os mesmos parâmetros.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Sorghum bicolor; Zea mays; Semiárido; Tolerância à seca; Trocas gasosas. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000200016 |
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| Pereira,Silvia; Frosi,Gabriella; Oliveira,Marciel Teixeira de; Lustosa,Bruno Melo; Arruda,Emília Pereira; Santos,Mauro Guida. |
| ABSTRACT Studies addressing the physiological and anatomical responses of plants under different light intensities normally are performed in short term. Thus, the present study includes a long term analysis. This study aims to verify whether the phenotypic variability off attributes in two woody tropical specieis, Paquira aquatica and Sterculia foetida, are compatible both under short term exposure to different light availability levels (full-light and half-light local irradiance) and long-term exposure in the same conditions. The study was developed in two phases: phase I (short term) and phase II (long term). The variables measured were referent to CO2 assimilation responses to light intensity, chlorophyll a fluorescence, chlorophyll content,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll a fluorescence; Gas exchange; Plastic response; Light curve. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000300429 |
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| Rodrigues,Bruno Monteiro; Arcoverde,Gabriela Burle; Antonino,Antônio Celso Dantas; Santos,Mauro Guida. |
| The objective of this work was to determine the effect of climatic seasonality on physic nut (Jatropha curcas), in field, under semiarid climate conditions. Stomatal conductance (g s), transpiration (E), soluble leaf carbohydrates (SLC), free amino acids (FAA) and total proteins (TP) were measured in leaves, in a commercial plantation in Northeast Brazil, during the summer and autumn. Plants showed high g s and E, as well as SLC, FAA and TP contents in the summer, which gradually decreased with the lower temperatures and photosynthetically active radiation during the autumn, despite the higher water availability. Even in conditions of adequate water availability, the combination of low temperatures and reduced light drastically decreased foliar metabolism. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Abiotic stress; Biodiesel; Stomatal conductance. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900020 |
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| Rodrigues,Bruno Monteiro; Souza,Bruna Dias; Nogueira,Rejane Mansur; Santos,Mauro Guida. |
| The predawn leaf water potential (Ψl), stomatal conductance (g s), CO2 assimilation (A), transpiration (E), chlorophyll a fluorescence and leaf metabolite contents (soluble sugars, proteins and free amino acids) of two tropical fruit species grown in a greenhouse were evaluated to determine the effect of induced water stress on young plants. Six month-old jackfruit (Artocarpus heterophyllus Lam.) and sugar apple (Annona squamosa L.) plants were evaluated in 10.0 L pots after eight days of water withholding, imposed by suspension of irrigation. Jackfruit water status was better than sugar apple. Sugar apple plants showed different daily stomatal behavior when well hydrated, compared to jackfruit plants under the same conditions. The gas exchange of both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annona squamosa; Artocarpus heterophyllus; Semi-arid; Tropical fruit; Water relations. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200011 |
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