Search Results

You are looking at 1 - 10 of 1,154 items for :

  • Refine by Access: All x
Clear All
Open access

Noah J. Langenfeld and Bruce Bugbee

Dissolved oxygen (DO) is the free oxygen available in solutions and is consumed in the metabolism of all aerobic organisms. DO concentration in water is used as an indicator of the health of ecosystems, and it varies with solution temperature

Free access

Guodong Liu, D. Marshall Porterfield, Yuncong Li, and Waldemar Klassen

A high seed germination percentage is a prerequisite for successful commercial vegetable production. Seed vigor, appropriate temperature, and oxygen and water bioavailability are key factors in high percentages of seed germination ( Bewley and Black

Free access

Corinne F.J. Rutzke, Alan G. Taylor, and Ralph L. Obendorf

mitochondrial respiration and oxidative phosphorylation. Under anaerobic or hypoxic conditions (in the absence of oxygen or under conditions of low oxygen, respectively) ethanol is produced from pyruvate in the ethanol fermentation pathway of metabolism

Free access

Gustavo H.A. Teixeira and José F. Durigan

weeks at 12 °C or for 3 weeks at room temperature compared with air storage without affecting the fruit quality. These differences in CA results might be related to different cultivars, because they present different tolerances to oxygen and carbon

Free access

Jennifer R. DeEll and Geoffrey B. Lum

Both, V. Thewes, F.R. Brackmann, A. Ferreira, D.D.F. Pavanello, E.P. Wagner, R. 2016 Effect of low oxygen conditioning and ultralow oxygen storage on the volatile profile, ethylene production and respiration rate of ‘Royal Gala’ apples Sci. Hort. 209

Free access

Juan Pablo Zoffoli, Valentina Sanguedolce, Paulina Naranjo, and Carolina Contreras

oxygen (ULO; 0.7 kPa O 2 ), a controlled atmosphere (CA) storage technology which reduces superficial scald ( Wang and Dilley, 2000 ) and its variants initial low oxygen (ILO) ( Wang and Dilley, 1999 ; Zanella, 2003 ) and dynamic atmosphere storage (DCA

Free access

M. Helena Gomes, Randolph M. Beaudry, and Domingos P.F. Almeida

for an inodorus-type melon (‘Piel de Sapo’) stored at 4 °C with initial oxygen partial pressures of 2.5, 21, and 70 kPa ( Oms-Oliu et al., 2008 ). During the first 10 d of storage at 4 °C, the respiration rates of cut ‘Piel de Sapo’ ranged from 0

Free access

T. Solomos, A. Kannellis, and C.S. Walsh

In the past three years we have studied the effects of oxygen on the maturation and ripening of `Gala' apples. Fruit-respiration, the onset of the climacteric rise in ethylene evolution and the rate of increase in ethylene production were measured. The effects of oxygen on softening and titrable acidity were also assessed. The delay in the onset of the climacteric rise in ethylene evolution shows enzymatic-type kinetics, with saturation levels of about 8-10% oxygen. Treatment with pure oxygen was highly detrimental; it induced visual symptoms of low-oxygen damage and high levels of ethanol. The slope of the rise in ethylene evolution is also a function of oxygen concentration, with an apparent Km for oxygen lower than that which delays the climacteric onset. The effect of oxygen on respiration is dependent on the physiological state of the fruit. In preclimacteric fruits, levels of oxygen between 2 and 8% eventually decrease respiration. Calculations of internal oxygen levels indicate that the diminution of respiration results from decreased metabolic activity in response to hypoxia.

Open access

Ling Li, Takashi Watanabe, Atsuko Uragami, Hiroaki Kitazawa, and Xiangyou Wang

). Moreover, it is known that abnormal oxygen conditions induce certain morphological changes in plant organs, such as internode elongation, via the regulation of plant hormones ( Fujii et al., 1974 ; Voesenek et al., 2003 ). Therefore, low O 2 treatment

Full access

Ying Qu, Xue Bai, Yajun Zhu, Rui Qi, Geng Tian, Yang Wang, Yonghua Li, and Kaiming Zhang

generation of reactive oxygen species (ROS), such as hydroxyl radicals (·OH), superoxide anions (O 2 ·- ), and hydrogen peroxide. Although well known for the damage they cause to cells, ROS are considered signalling molecules in plant stress perception ( Zhou