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Nanopriming with green-synthesized nanoparticles (NPs) has the potential to optimize crop performance under different conditions. This work investigated the implications of nanopriming of maize seeds with green-synthesized Cu-based NPs (ascorbic acid/starch, ACu, and green tea extract, GTCu) on the nutritional and morphophysiological traits of maize plants. Seeds Zea mays cv. Balu 787 were treated with different concentrations (14.5, 29, 58, and 116 mg Cu L–1) of both NPs, compared to hydropriming (CONT) and unprimed seeds (TEST). In a laboratory, seeds were germinated under different water conditions, while the long-term effects of seed nanopriming were evaluated in a greenhouse experiment with plants under different water conditions. The ionomic profile and morphophysiological traits of the plants were evaluated. In germination with water, both NPs increased the seedling Cu content by 37%, while in germination with PEG-6000, ACu and GTCu increased germination by 53 and 131%, respectively, compared with TEST and CONT. Without water restriction, hydropriming and ACu provided higher concentrations of many elements in seedling tissues. Under water deficit, only ACu stood out compared to the other treatments. GTCu promoted nutritional imbalance in both germination conditions. Although both NPs improved the water use efficiency of plants, ACu stood out for providing a better root/shoot ratio, helping the plants to be more tolerant to water deficit. GTCu provided greater shoot growth combined with lesser induction of root growth, leading to higher susceptibility to water deficit. In both experimental conditions, the dose of 58 mg Cu L–1 was highlighted, due to the induction of the greatest effects on seedling/plant development. The results suggest differences in the adsorption/absorption of NPs, with ACu triggering more positive effects on maize plants than GTCu. Overall, this study highlights the potential contribution of green nanotechnology in inducing plant growth and tolerance to abiotic stress by seed nanopriming. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi is the property of Revista Brasileira de Engenharia Agricola e Ambiental and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of BIOAGRO is the property of Revista BIOAGRO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Caatinga is the property of Revista Caatinga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of the experiment was to evaluate and standardize the germination test under high temperatures to evaluate the vigor of corn seeds. For the experiment it was used six batches of hybrid corn seeds with different levels of vigor and similar germination potential. After the initial characterization of the lots, it was evaluated the influence of temperature of 31, 34 and 37°C on germination, first count, length and dry mass of roots and shoots with lots of different levels of force. Data were subjected to analysis of variance and means were compared by Tukey test at 5%, in 3x6 factorial, which corresponded to three combinations of temperatures and six seed lots. The first count, the percentage of germination, length and dry mass, obtained at different temperatures along with the initial characterization data were submitted to the study of simple linear correlation at 5% significance. Temperatures of 31, 34 and 37°C proved to be efficient for the evaluation of maize seed vigor, with emphasis on the temperature of 34°C which showed higher correlation with laboratory tests of the initial characterization of the lots and also with data emergency and the speed of the emergency field. [ABSTRACT FROM AUTHOR]

The objective of this work the objective was to evaluate the effect of water stress and salinity on seed germination and initial development of seedlings sweet corn at different osmotic potentials in the substrate. Seeds of cultivar BR 400 (Super Sweet) were germinated in germitest paper moistened with solutions of polyethylene glycol (PEG) 6000 and potassium chloride (KCl) in the osmotic potentials of 0.0, -0.2, -0. 4, -0.6, -0.8 and -1.0 MPa, in completely randomized experimental design. Seed and seedlings performance was assessed through germination tests, first germination count, percentage of abnormal seedlings and dead seeds, length of aerial part and root of seedlings. The PEG 6000 causes a decrease in seed germination and early growth of seedlings of sweet corn in relation to salt stress with KCl, with reduction in seedling vigor and germination performance of sweet corn seeds. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi is the property of Revista Brasileira de Engenharia Agricola e Ambiental and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ceres is the property of Revista Ceres and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The amount and timing of nitrogen application can favor seed quality, such as increasing protein content, which is an important constituent for embryo development. The objective of this study was to evaluate the physiological quality of sweet corn seeds collected from plants cultivated with different dosages and timings of nitrogen top-dressing applications. Seeds of the BR 400 variety (Super Sweet) were used obtained from plants submitted to dosages of 0, 40, 80 and 120kg ha-1 of N in two top-dressing applications (vegetative and reproductive stages). The weight of 100 grains, germination, first count of germination test, dry weight of normal seedlings from the germination test, seedling growth, cold test, accelerated aging, tetrazolium vigor and electric conductivity and emergency speed rate were determined. Data was submitted to an analysis of variance using the F-test at the 5% level and second degree regression analysis. The dosage and time of application of nitrogen top-dressing did not affect seed weight or the germination of sweet corn seeds. An increase of the N top-dressing dosage, applied in the vegetative stage reduced the length of the aerial part, the root and the whole seedling. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciência Agronômica is the property of Revista Ciencia Agronomica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)