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Michelle DaCosta and Bingru Huang

antioxidant enzyme activities, providing indirect evidence for the extent of generation of AOS and the importance of these enzymes in scavenging free radicals ( Smirnoff, 1993 ). Drought stress resistance has been associated with either maintenance or

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Huiying Li, Hongji Luo, Deying Li, Tao Hu, and Jinmin Fu

hydroponic system using half-strength Hoagland's solution for 7 d. Activity of antioxidant enzymes. The plants treated with 0.5 m m Pb exhibited elevated CAT activity compared with the control, whereas plants treated with 3.2 m m of Pb showed suppressed CAT

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Xiangdong Huang, Dong Xue, and Lian Xue

as integral components of soil quality. Microbial biomass C (C mic ), basal respiration (R mic ), and enzyme activities have been widely used in soil investigations as a result of their great sensitivity to anthropogenic disturbance and environmental

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Guangxin Liu, Xiaoqian Su, Lingling Guan, and Fengrong Hu

these harmful products, some enzymes function to clear free radicals and reactive oxygen. When plants are infected by pathogens, some enzyme activities are enhanced and others are reduced. These changes in enzyme activity affect various physiological and

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Ramón A. Arancibia and Carl E. Motsenbocker

Red-mature Tabasco (Capsicum frutescens) fruit (`McIlhenny Select') normally separate easily at the junction of the fruit and receptacle or calyx. Differences in fruit detachment force (FDF) between two lines, one that separates readily (`McIlhenny Select') and one that does not (`Hard Pick'), have been reported previously (Motsenbocker et al., 1995). In this study, enzyme activity from the detachment area was analyzed by viscosity reduction. The reaction mixture was 0.3% pectin in 20 mm NaAc, pH 5.5, for polygalacturonase (PG) and 0.6% carboxymethyl cellulose (CMC) in 20 mm NaPO4, pH 6.0, for cellulase. Preliminary data indicated that PG and cellulase enzyme activity increased during fruit ripening in both lines. Only cellulase activity, however, correlated with FDF. In addition, the activity of both enzymes was higher in the `McIlhenny Select' line than the `Hard Pick' line at the orange and red-mature stages.

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Yong Zhang, Chunxia Fu, Yujing Yan, Xiaodan Fan, Yan’an Wang, and Ming Li

; Zhang et al., 2013 ), but the mechanisms underlying these improvements are not clearly understood. There are also no published data for apple regarding the relationship between foliar Zn spray and the activity of enzymes involved in carbohydrate

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Lixin Xu, Liebao Han, and Bingru Huang

, and cytosolic APX ( Shigeoka et al., 2002 ; Yoshimura et al., 2001 ). Previous studies have indicated that higher activity levels of antioxidant enzymes may contribute to better drought tolerance by increasing the protection capacity against oxidative

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Hui-Juan Zhou, Zheng-Wen Ye, and Ming-Shen Su

al., 2017 ). The activity of LOX, an O 2 -requiring enzyme, was slowed down by MAP conditions, which might limit the availability of straight-chain precursors of aroma compounds. However, the other three enzymes were not equally sensitive to O 2

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Lantian Du, Baojian Huang, Nanshan Du, Shirong Guo, Sheng Shu, and Jin Sun

(cv. Yusuan No. 1) to assess the effects of relay intercropping on cucumber plant growth, soil enzyme activities and microbial diversity, and biomass and community diversity. Materials and Methods Experimental materials and treatments. The experiments

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Lucia E. Villavicencio, Sylvia M. Blankenship, G. Craig Yencho, Judith F. Thomas, and C. David Raper

radial walls of the phellogen, determined by their lability and proneness to fracture, that determines the resistance to skinning ( Lulai, 2002 ). There is no information on how cell wall enzyme activity varies in sweetpotato. Pectinases are