Influência do dano físico na fisiologia pós-colheita de folhas de taioba

Mendes, Teresa Drummond Correia; Santos, J. S. dos; Vieira, Luciana Marques; Cardoso, Deise Silva Castro Pimentel; Finger, Fernando Luíz

doi:10.1590/s0006-87052011000300026

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…Regarding the weight loss in tomatoes, Rab et al (2013) concluded that the change in fresh matter may have been caused by the loss of water through fruit transpiration and by resistance to moisture loss, which can decrease as the fruit progresses in maturation. Mendes et al (2011) evaluated vegetable products and concluded that, within few minutes after a physical damage, there was an increase in respiration, ethylene production and other biochemical reactions responsible for changes in color, texture and nutritional quality. For Beckles (2012), the maturity stage of tomato at harvest, as well as the pre-and post-harvest control, are essential factors to guarantee fruit quality.…”

Section: Resultsmentioning

confidence: 99%

Quantitative and qualitative loss of tomato fruits during mechanized harvest

Machado

Fernándes

Megguer

et al. 2018

Rev. bras. eng. agríc. ambient.

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The use of mechanization in the harvesting of industrial tomatoes provides greater yield and speed of this stage. However, mechanical intervention in this process may alter the physiology of harvested fruits. Therefore, the objective of this study was to measure the quantitative losses of tomato fruits and to verify the physico-chemical behavior of fruits harvested based on physicochemical analysis in harvesters with different hours of use. Three self-propelled harvesters of the same brand and model with different working hours were used. Manually selected or undamaged fruits were harvested; afterwards, mechanized harvesting was carried out. Firmness, titratable acidity, soluble solids content (°Brix), pH, weight loss and fruit status classification proposed by the Ministry of Livestock, Agriculture and Food Supply of 2002 were evaluated. Quantitative losses were divided into: losses on vines, losses on soil and total losses. It was found that the number of hours worked by the harvester did not affect the quantitative losses. The amount of overall damage in a certain amount of fruit is greater when the harvester has a greater number of hours worked. Mechanized harvesting affected the physical attributes of the fruits, such as firmness and percentage of weight loss.

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Section: Resultsmentioning

confidence: 99%

Quantitative and qualitative loss of tomato fruits during mechanized harvest

Machado

Fernándes

Megguer

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…The Hue angle refers to the value in degrees corresponding to the three-dimensional color diagram, in which: 0º-red, 90º-yellow, 180º-green and 270º-blue (Mendes et al, 2011;Chitarra & Chitarra, 2005). During the 15 days of storage, the Hº values for lamb's-ear leaves stored in the four packaging systems fluctuated, but at the end of the storage period the observed values were lower than those obtained on the first day (Figure 7).…”

Section: Hue (Hº)mentioning

confidence: 99%

Influence of packaging on the conservation of quality attributes of lamb’s-ear leaves during storage

Silva

Souza

Pedrosa

et al. 2021

RSD

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The objective of this study was to evaluate the influence of the packaging system on the useful life and post-harvest quality of lamb’s-ear leaves (Stachys byzantina L.). The sanitized sheets were packaged in four different packaging systems: (A) rigid polyethylene (PET), (B) PET together with ethylene-absorbing sachet, (C) PET wrapped with high barrier plastic film, and (D) PET together with an ethylene-absorbing sachet and wrapped with high barrier plastic film and stored at 7 ° C. Samples for physical-chemical analysis, bioactive compounds and antioxidant activity were removed before storing and at 5, 10 and 15 days of storage. The leaves contained in packages C showed less loss of mass and in system D they showed greater preservation of color attributes (L *, C * and °H). The packaging did not influence the contents of bioactive compounds, which showed higher values at 5 days of storage. The leaves stored in A, B, C and D showed high antioxidant capacity until the 15th day of storage. It was concluded that the quality atrib\utes of the lamb’s-ear leaves were kept in all packaging systems throughout 15 days of cold storage. The contents of bioactive compounds and antioxidant activity showed the highest values up to 5 days of storage at 7 ºC. Thus, considering the economic aspects and practicality in handling, packaging A is the most suitable for refrigerated storage (7 ºC) and commercialization of fresh lamb’s-ear leaves up to 15 days of storage.

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“…These responses may occur after a few minutes to some hours after the injury at the damage site (local response) and at undamaged adjacent tissues (systemic response) (Leon et al, 2001). In tannia leaves, mechanical injury is visually detected by the yellowing, and later, some darkening restricted to the damaged region, not extending to the entire leaf (Mendes et al, 2011). The aim of this study was to evaluate the effect of mechanical injury on the physiological changes of tannia leaves and the eventual systemic responses from the site of injury into the adjacent undamaged areas.…”

Section: Introductionmentioning

confidence: 99%

Postharvest responses of tannia (Xanthosoma sagittifolium) leaves to mechanical wounding

Mendes¹,

França²,

Petrucci³

et al. 2017

Aust J Crop Sci

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Tannia leaves are consumed in many regions of Tropical Americas and Africa. Due to large size and fragility, leaves are subjected to physical wounding during handling. As a result, visual symptoms of yellowing develop at wounding and adjacent tissues. The aim of this study was to evaluate the effect of mechanical injury on the physiological changes of tannia leaves at damaged tissue and adjacent areas. For this purpose, the lamina of leaves was perforated for several times with a needle. Then, the leaf samples were excised off as follows: a 0.6 cm diameter (circle A), containing the injured area; 1.1 cm O-ring B, around the circle A, 1.6 cm O-ring C, around the B. Control samples were taken from the opposite side of the leaves free of any wounding. Analysis of fresh weight loss and concentration of soluble phenolic compounds were performed after 30 min, 2, 4 and 6 h and the leaf chlorophyll content was determined after 30 min, 24, 48 and 72 h. The mechanical injury increased the postharvest accumulated fresh weight loss by 59.1% on circle A and by 22.6% on O-ring B after 6 h. The injured circle A accumulated 56% more soluble phenolic over the period of 6 h, which can be related to the activation of defense mechanism by the cell. The rate of chlorophyll degradation was not affected by the injury up to 72 h after wounding. Leaf wounding increases fresh weight loss and induces accumulation of soluble phenolic compounds at location of the injury.

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Influência do dano físico na fisiologia pós-colheita de folhas de taioba

Cited by 6 publications

References 23 publications

Quantitative and qualitative loss of tomato fruits during mechanized harvest

Quantitative and qualitative loss of tomato fruits during mechanized harvest

Influence of packaging on the conservation of quality attributes of lamb’s-ear leaves during storage

Postharvest responses of tannia (Xanthosoma sagittifolium) leaves to mechanical wounding

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