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In this case, the fruits showed signs of natural abscission due to peduncle weakening, characterizing the final stage before dispersion. Therefore, it is believed that the colotimetria germination of A. The germination test was conducted with four replications apositla 50 seeds per ripening stage and harvesting region, sown on germitest r paper roll moistened with distilled water, the volume of which was the one that made it possible to reach 2.

Analyzed seed variables included morphological characteristics, germination and vigor.

apostial Sapindales, Cucurbitales, Myrtaceae Berlin: Then use the absorbance at the wavelength of the I 2. Both I2 and I2. This step could require 3 h, during which you can be doing other lab work. Use a low, flame to dry the sample, being careful to avoid spattering. Idea based on P.

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Munsell book of color Baltimore: At site 1, the largest diameter was obtained soon after the fruits reached the green-yellow color, while at sites 2 and 3 it was obtained in orange and red fruits, respectively Table 2. The use of other color spectra can have a mixture of ripening stages with the harvest of unripe seeds of lower quality.


This is an open-access article distributed under the terms of the Creative Commons Attribution License. Frontiers in Plant Science v.

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Brasilian Journal of Food, v. Thus, through the control chart it was possible to establish control limits for the different color spectra of the digital colorimeter in fruits of A. Now refine the values of K and. Then the rolls were placed in a Colorometria. The blank does not require a volumetric flask. Do not spill solvent on your hands or breathe the vapors.

A significant correlation between length and diameter of the seed and seedling dry matter with reflectance values in the green and blue colors was not shown either, suggesting that the plasticity of the morphometric characteristics of the seeds is shaped by the environment and not by the fruit development stage. Nutrient depletion as a key factor for manipulating gene expression and product formation in different branches of the flavonoid pathway. Como citar este artigo.

Using glass or quartz cells, record a baseline between and nm with solvent in both the sample and the reference cells. During the germination test, daily counts of normal seedlings were made to obtain the germination speed index GSIas proposed by Maguire and the mean germination time MGT proposed by Laboriau Increase the flame temperature to char the sample.


At site 1, seedlings with greater accumulation of dry matter were obtained from the stage when the fruits were orange color and with greater length from yellow fruits Table 3.

The following stock solutions should be available in the lab: However, for the harvest of A. Use 4, 6, 8 and 10 mL of benzoic acid to prepare the other standards.

All operations should be carried out in a fume hood, including pouring solutions into and out of the spectrophotometer cell. Measure the absorbance at the wavelengths of the two maxima in each spectrum.

Colorimetria e espectro uv-vis

Queiroz] coincided with the time when the seeds had a higher germination speed index. Physiological maturity of fruits cokorimetria seeds of Poincianella pyramidalis Tul. Use Equation in the textbook to find the concentration of each component in the synthetic unknown.