Impact of elevated O3 on visible foliar symptom, growth and biomass of Cinnamomum camphora seedlings under different nitrogen loads

2011 ◽  
Vol 13 (10) ◽  
pp. 2873 ◽  
Author(s):  
Junfeng Niu ◽  
Weiwei Zhang ◽  
Zhaozhong Feng ◽  
Xiaoke Wang ◽  
Yuan Tian
Keyword(s):  
Cinnamomum Camphora ◽  
Elevated O3 ◽  
Nitrogen Loads ◽  
Foliar Symptom

scholarly journals Non-Stomatal Limitation to Photosynthesis in Cinnamomum camphora Seedings Exposed to Elevated O3

PLoS ONE ◽  
2014 ◽  
Vol 9 (6) ◽  
pp. e98572 ◽  
Author(s):  
Junfeng Niu ◽  
Zhaozhong Feng ◽  
Weiwei Zhang ◽  
Ping Zhao ◽  
Xiaoke Wang
Keyword(s):  
Cinnamomum Camphora ◽  
Stomatal Limitation ◽  
Elevated O3

Effects of ozone exposure on sub-tropical evergreen Cinnamomum camphora seedlings grown in different nitrogen loads

Trees ◽  
2011 ◽  
Vol 25 (4) ◽  
pp. 617-625 ◽  
Author(s):  
Zhaozhong Feng ◽  
Junfeng Niu ◽  
Weiwei Zhang ◽  
Xiaoke Wang ◽  
Fangfang Yao ◽  
...  
Keyword(s):  
Ozone Exposure ◽  
Cinnamomum Camphora ◽  
Nitrogen Loads

Specific organic and nutrient loads in stabilized sludge from municipal treatment plants

1996 ◽  
Vol 33 (12) ◽  
pp. 243-250 ◽  
Author(s):  
O. Nowak ◽  
A. Franz ◽  
K. Svardal ◽  
V. Müller
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Single Stage ◽  
Nutrient Loads ◽  
Activated Sludge Process ◽  
Waste Sludge ◽  
Sludge Stabilization ◽  
Nitrogen Loads ◽  
Theoretical Considerations ◽  
P Removal

By means of theoretical considerations and of statistical evaluations, specific organic and nitrogen loads in separately stabilized sludge have been found to be in the range of 16 to 20g VSS/PE/d and of 1.1 to 1.5 g N/PE/d respectively. About 0.6g P/PE/d are removed from the wastewater in activated sludge plants without chemical or enhanced biological P removal. By using the single-stage activated sludge process without primary sedimentation and without separate sludge stabilization, almost complete nitrogen removal can be achieved, but specific organic and nitrogen loads in the waste sludge are up to two times higher than in separately stabilized sludge.

scholarly journals Ozone Response of Leaf Physiological and Stomatal Characteristics in Brassica juncea L. at Supraoptimal Temperatures

Land ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 357
Author(s):  
Jong Kyu Lee ◽  
Myeong Ja Kwak ◽  
Sang Hee Park ◽  
Han Dong Kim ◽  
Yea Ji Lim ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Agricultural Production ◽  
Stomatal Density ◽  
Anthropogenic Activities ◽  
Interactive Effects ◽  
Target Concentration ◽  
Stomatal Characteristics ◽  
Elevated O3 ◽  
Significant Difference ◽  
Supraoptimal Temperatures

Plants are affected by the features of their surrounding environment, such as climate change and air pollution caused by anthropogenic activities. In particular, agricultural production is highly sensitive to environmental characteristics. Since no environmental factor is independent, the interactive effects of these factors on plants are essential for agricultural production. In this context, the interactive effects of ozone (O3) and supraoptimal temperatures remain unclear. Here, we investigated the physiological and stomatal characteristics of leaf mustard (Brassica juncea L.) in the presence of charcoal-filtered (target concentration, 10 ppb) and elevated (target concentration, 120 ppb) O3 concentrations and/or optimal (22/20 °C day/night) and supraoptimal temperatures (27/25 °C). Regarding physiological characteristics, the maximum rate of electron transport and triose phosphate use significantly decreased in the presence of elevated O3 at a supraoptimal temperature (OT conditions) compared with those in the presence of elevated O3 at an optimal temperature (O conditions). Total chlorophyll content was also significantly affected by supraoptimal temperature and elevated O3. The chlorophyll a/b ratio significantly reduced under OT conditions compared to C condition at 7 days after the beginning of exposure (DAE). Regarding stomatal characteristics, there was no significant difference in stomatal pore area between O and OT conditions, but stomatal density under OT conditions was significantly increased compared with that under O conditions. At 14 DAE, the levels of superoxide (O2-), which is a reactive oxygen species, were significantly increased under OT conditions compared with those under O conditions. Furthermore, leaf weight was significantly reduced under OT conditions compared with that under O conditions. Collectively, these results indicate that temperature is a key driver of the O3 response of B. juncea via changes in leaf physiological and stomatal characteristics.

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