Federal University of Viçosa, Viçosa, Brazil.
Federal Rural University of Pernambuco, Serra Talhada, Brazil.
J Food Biochem. 2019 May;43(5):e12840. doi: 10.1111/jfbc.12840. Epub 2019 Mar 18.
The aim of this study was to examine oxidative protection and enzymatic browning in the storage of minimally processed cassava and their relationship with population density and harvest age. Population densities were 1.0, 1.25, 1.5, and 1.75 plants m . After being harvested at 300, 360, or 420 days after planting, cassava were minimally processed and stored at 5 ± 2°C. It was observed that superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) play key roles in the tolerance of young roots to browning. Planting density, however, does not appear to be a key factor modulating the activity of the enzymes studied. PRACTICAL APPLICATIONS: Younger harvested cassava roots, harvested at 300 days, are more tolerant to enzymatic browning. This appears to be in part due to enzymatic activity modulation of the SOD, CAT, and POD enzymes. In addition, it has been demonstrated that agronomic techniques aimed at increasing productivity, such as increasing the planting density of cassava, do not alter the biomarkers of postharvest quality. In summary, evidence that field management may be an efficient approach to improving the conservation of minimally processed cassava is provided. We believe that the findings of this paper will be of great interest regarding the influence of field management on the postharvest quality of freshly cut cassava and will also provide applicable results relating to its production chain.
本研究旨在探讨最小化加工木薯在贮藏过程中的氧化保护和酶褐变及其与种群密度和收获年龄的关系。种群密度分别为 1.0、1.25、1.5 和 1.75 株/m。在种植后 300、360 或 420 天时收获后，木薯被最小化加工并储存在 5±2°C。结果表明，超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和过氧化物酶（POD）在幼根对褐变的耐受中起关键作用。然而，种植密度似乎不是调节研究酶活性的关键因素。实际应用：收获时间较早的、更年轻的木薯根，在 300 天收获时，对酶褐变的耐受性更强。这部分原因可能是 SOD、CAT 和 POD 酶的酶活性调节。此外，已经证明，旨在提高生产力的农业技术，如增加木薯的种植密度，不会改变采后质量的生物标志物。总之，提供了田间管理可能是改善最小化加工木薯保存的有效方法的证据。我们相信，本文的研究结果将对田间管理对新鲜切木薯采后质量的影响具有重要意义，并将提供与其生产链相关的适用结果。
