Recomendacoes tecnicas sobre gergelim; regiao Centro-Sul do Brasil. EMBRAPA. Centro Nacional de Pesquisa do Algodao (Campina Grande, PB). DESEMPENHO AGRONÔMICO DE GENÓTIPOS DE GERGELIM (Sesamum indicum L.) SOB Pesquisadora, Doutora, EMBRAPA, CNPA, Campina Grande. O trabalho foi realizado em dezembro de , na Embrapa Algodão, de onde foram retirados discos foliares de gergelim para serem mensurados os índices.
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Leaf relative water content was measured according to Smart amp; Bingham Universal chlorophyll equations for estimating chlorophylls a, b, c, and d and total chlorophylls in natural assemblages of photosynthetic organisms using acetone, methanol, or ethanol solvents. Da mesma forma, Amarante et al.
Processo de elaboração de extrudados não expandidos (pellets) de milho e sementes de gergelim.
Chlorophyll meter evaluation for nitrogen management in corn. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Activation of systemic disease resistance in pea by an avirulent bacterium or a benzothiadiazole, but not by a fungal leaf spot pathogen.
De acordo com Markwell et al. Conclusions Sesame genotypes did not differ statistically and there were differences in the variables between the water replenishment rates.
Recomendacoes tecnicas sobre gergelim; regiao Centro-Sul do Brasil.
Journal of Tropical Ecology, v. Stress responses in plants: Canadian Journal of Botany, v.
Such behavior may indicate that sesame plants are more susceptible to the stress embeapa by excess of water than the one caused by its absence, corroborating the claim of Arriel et al.
Nevertheless, reduction in carotenoids combined with low content of chlorophyll a in the leaves of plants subjected to both absence and excess of water may contribute to increasing gergeim injuries to the photosynthetic gergeelim, leading to limitations in growth, development and production.
The sesame crop has stood out due to the high nutritional content of its seeds, in addition to being able to be cultivated in the tropical and subtropical regions such as Northeast Brazil. Determining the content of carotenoids in plants subjected to some sort of stress is very important, due to their role in the dissipation of the energy intercepted. Nevertheless, in these regions, irrigation can be used to supplement rainfall, which leads to improvement in the growth, development and yield of crops.
Descrição botânica e técnicas da polinização controlada do gergelim (Sesamum indicum L).
The spectral determination of chlorophylls a and b, as weel as total carotenoids, using various solvents with spectrophotometers of different resolution. In this context, this study aimed to evaluate the physiological, biochemical and productive behavior of sesame genotypes as a function of different rates of water replacement.
Revista Brasileira de Fisiologia Vegetal, v. At 50 DAE, leaf samples were collected to determine enzymatic activity: A method for the extraction of chlorophyll from leaf tissue without maceration. Chlorophyll is one of the main factors related to plant photosynthetic efficiency and, consequently, to growth and adaptability to different environments and conditions caused by the various types of stress.
All evaluations, except of production, were carried out at 90 days after emergence DAE. Physiological, biochemical and productive changes in sesame genotypes subjected to different gefgelim of water replenishment. Journal of Botany, v.
Similar response smbrapa found by Silva et al. Analyses were carried out using the statistical programs Sisvar 5. Along the experimental period, temperature, relative humidity, wind speed and rainfall data Table 1 were collected at the Embrapa Cotton Meteorological Station, in Barbalha-CE. Non destructive analysis of photosynthetic pigments in leaves of Sesamum indicum L.
Literature Cited Arriel, N. Data corresponding to the following variables were collected: Revista de Oleaginosas e Fibrosas, v. Non-destructive analysis of photosynthetic pigments in cotton plants. These pigments act as photoprotectors, deactivating singlet and triplet oxygen by absorbing the energy present in these compounds during their formation, which prevents oxidative damages to plant cells Engel amp; Poggiani, ; Taiz amp; Zeiger, ; Brito et al.
Simulating forest shade to study the development ecology of tropical plants: Nonetheless, increment in water depth above This behavior demonstrates sesame sensitivity to embrapq deficit and excess of water in the soil. In addition, yield reduction is directly related to the water stress conditions, because plants use the stomatal closure mechanism to protect themselves from water losses through transpiration, leading to a reduction in the photosynthetic rate Taiz amp; Zeiger, The genotypes did not differ statistically and there were differences in the variables between the water replacement rates.
However, no studies were found on the determination of physiological and biochemical variables in genotypes of sesame under different water depths.
Revista Brasileira de Fisiologia Vegetal, v. At 95 DAE, harvest was done manually by cutting the whole plant at soil level. In special, to Dr. For electrolyte leakage ELthe data of the sesame genotypes fitted to a decreasing linear model and maximum estimated value The sesame crop is resistant to drought and can produce with mm of water well distributed along the cycle Bernardo et al. Results and Discussion Table 2 shows the analysis of variance summary for the growth physiological, biochemical and production variables.
Plants protect their cells and subcellular compartments from cytotoxic effects caused by ROS by using antioxidant enzymes, such as catalase and peroxidase.