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Search Results: 1 - 10 of 33089 matches for " Zhaozhong Feng "
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A meta-analysis of responses of wheat yield formation to elevated ozone concentration
ZhaoZhong Feng,Kazuhiko Kobayashi,XiaoKe Wang,ZongWei Feng
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-008-0552-6
Abstract: The meta-analysis method was applied to quantitatively investigate effects of the elevated ozone concentration ([O3]) on chlorophyll concentration, gas exchange and yield components of wheat. There were 39 effective references through Web of Science (ISI, USA) and Chinese journal full-text database (CNKI, China). The results of meta-analysis indicated that elevated [O3] decreased grain yield, grain weight, grain number per ear, ear number per plant and harvest index by 26%, 18%, 11%, 5% and 11%, respectively, relative to ambient air. The decrease in leaf physiological characters was much greater than that in yield when wheat was expose to elevated [O3], while light-saturated photosynthetic rate (Asat), stomatal conductance (Gs) and chlorophyll content (Chl) decreased by 40%, 31%, and 46%, respectively. The responses to elevated [O3] between spring wheat and winter wheat were similar. Most of the variables showed a linear decrease trend with an increase of [O3]. The most significant decrease for Asat, Gs and Chl was found in grain filling stage. Elevated [CO2] could significantly ameliorated or offset the detrimental effects caused by elevated [O3].
A meta-analysis of responses of wheat yield formation to elevated ozone concentration

ZhaoZhong Feng,Kazuhiko Kobayashi,XiaoKe Wang,ZongWei Feng,

科学通报(英文版) , 2009,
Abstract: The meta-analysis method was applied to quantitatively investigate effects of the elevated ozone concentration (O3]) on chlorophyll concentration, gas exchange and yield components of wheat. There were 39 effective references through Web of Science (ISI, USA) and Chinese journal full-text database (CNKI, China). The results of meta-analysis indicated that elevated O3] decreased grain yield, grain weight, grain number per ear, ear number per plant and harvest index by 26%, 18%, 11%, 5% and 11%, respectively, relative to ambient air. The decrease in leaf physiological characters was much greater than that in yield when wheat was expose to elevated O3], while light-saturated photosynthetic rate (Asat), stomatal conductance (Gs) and chlorophyll content (Chl) decreased by 40%, 31%, and 46%, respectively. The responses to elevated O3] between spring wheat and winter wheat were similar. Most of the variables showed a linear decrease trend with an increase of O3]. The most significant decrease for Asat, Gs and Chl was found in grain filling stage. Elevated CO2] could significantly ameliorated or offset the detrimental effects caused by elevated O3]. Supported by National Natural Science Foundation of China (Grant No. 30670387), Eco-Frontier Fellowship of the Ministry of Environment, Japan (Grant No. 07-C062-03) and Ministry of Science and Technology of People’s Republic China with 973 Project (Grant No. 2002CB410803)
Non-Stomatal Limitation to Photosynthesis in Cinnamomum camphora Seedings Exposed to Elevated O3
Junfeng Niu, Zhaozhong Feng, Weiwei Zhang, Ping Zhao, Xiaoke Wang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0098572
Abstract: Ozone (O3) is the most phytotoxic air pollutant for global forests, with decreased photosynthesis widely regarded as one of its most common effects. However, controversy exists concerning the mechanism that underlies the depressing effects of O3 on CO2 assimilation. In the present study, seedlings of Cinnamomum camphora, a subtropical evergreen tree species that has rarely been studied, were exposed to ambient air (AA), ambient air plus 60 [ppb] O3 (AA+60), or ambient air plus 120 [ppb] O3 (AA+120) in open-top chambers (OTCs) for 2 years. Photosynthetic CO2 exchange and chlorophyll a fluorescence were investigated in the second growing season (2010). We aim to determine whether stomatal or non-stomatal limitation is responsible for the photosynthesis reduction and to explore the potential implications for forest ecosystem functions. Results indicate that elevated O3 (E-O3) reduced the net photosynthetic rates (PN) by 6.0-32.2%, with significant differences between AA+60 and AA+120 and across the four measurement campaigns (MCs). The actual photochemical efficiency of photosystem II (PSII) in saturated light (Fv′/Fm′) was also significantly decreased by E-O3, as was the effective quantum yield of PSII photochemistry (ΦPSII). Moreover, E-O3 significantly and negatively impacted the maximum rates of carboxylation (Vcmax) and electron transport (Jmax). Although neither the stomatal conductance (gs) nor the intercellular CO2 concentration (Ci) was decreased by E-O3, PN/gs was significantly reduced. Therefore, the observed reduction in PN in the present study should not be attributed to the unavailability of CO2 due to stomatal limitation, but rather to the O3-induced damage to Ribulose-1,5-bisphosphate carboxylase/oxygenase and the photochemical apparatus. This suggests that the down-regulation of stomatal conductance could fail to occur, and the biochemical processes in protoplasts would become more susceptible to injuries under long-term O3 exposure, which may have important consequences for forest carbon and water budget.
Arbuscular mycorrhizal fungi alter the response of growth and nutrient uptake of snap bean (Phaseolus vulgaris L.) to O3
Arbuscular mycorrhizal fungi alter the response of growth and nutrient uptake of snap bean(Phaseolus vulgaris L.) to O_3

Shuguang Wang,Zhaozhong Feng,Xiaoke Wang,Wenliang Gong,
Shuguang Wang
,Zhaozhong Feng,Xiaoke Wang,Wenliang Gong

环境科学学报(英文版) , 2011,
Abstract: The effects of arbuscular mycorrhizal fungi (AMF) Glomus mosseae on the responses to elevated O3 in growth and nutrition of snap bean (Phaseolus vulgaris L. cv Guangzhouyuan) were investigated. Exposure was conducted in growth chambers by using three O3 concentrations (20 (CF), 80 (CFO1) and 120 nL/L (CFO2); 8 hr/day for 75 days). Results showed that elevated O3 slightly impacted overall mycorrhizal colonization, but significantly decreased the proportional frequency of hypha and increased the proportional frequency of spores and vesicles, suggesting that O3 had significant effects on mycorrhizal structure. Elevated O3 significantly decreased yield, dry mass and nutrient contents (N, P, K, Ca and Mg) in both non-mycorrhizal and mycorrhizal plants. However, significant interactive effects were found in most variables due to that the reduction by O3 in the mycorrhizal plants was less than that in the non-mycorrhizal plants. Additionally, AMF increased the concentrations of N, P, Ca, and Mg in shoot and root. It can be concluded that AMF alleviated detrimental effects of increasing O3 on host plant through improving plant nutrition and growth.
Response of gas exchange of rape to ozone concentration and exposure regime

Zhaozhong Feng,Xiaoke Wang,Qiwei Zheng,Zongwei Feng,Juqing Xie,Zhan Chen,

生态学报 , 2006,
Abstract:
Effects of elevated ozone on growth and yield of field-grown rice in Yangtze River Delta, China
CHEN Zhan,WANG Xiaoke,FENG Zhaozhong,ZHENG Feixiang,DUAN Xiaonan,YANG Wenrui,
CHEN Zhan
,WANG Xiaoke,FENG Zhaozhong,ZHENG Feixiang,DUAN Xiaonan,YANG Wenrui

环境科学学报(英文版) , 2008,
Abstract: With rapid industrialization and urbanization in the Yangtze Delta,China,the tropospheric ozone concentration has increased to levels that induce orop yield loss.Rice,a widely grown crop in China,was investigated in field-established,open-top chambers.Four treatments were used:charcoal-filtered air (CF),non-charcoal-filtered air (NF),and charcoal-filtered air with two levels of additional ozone (O3-1 and O3-2).The AOT40s (accumulated hourly mean ozone concentration above 40 ppbv) were 0,0.91,23.24,and 39.28 ppmv.h for treatraent of CF,NF,O3-1,and O3-2,respectively.The rice height and biomass were reduced in the elevated ozone concentration.Less organic matter partitioning to roots under the elevated ozone significantly decreased rice root activity.The yield loss was 14.3% and 20.2% under O3-1 and O3-2 exposure,respectively.This was largely caused by a reduction in grain weight per panicle.
Effects of environmental pollutants on arbuscular mycorrhiza formation and function
环境污染物对丛枝菌根(AM)形成及功能的影响

WANG Shuguang,FENG Zhaozhong,WANG Xiaoke,
王曙光
,冯兆忠,王效科

应用生态学报 , 2006,
Abstract: Arbuscular mycorrhiza(AM) possesses the characteristics of both microbe and plant.Considerable attention has been focused on the use of AM in the remediation of polluted soil,but AM could be poisoned by pollutants when exposed to polluted soil,and thus,the significance of its application might be reduced.Therefore,how to reduce the negative effects of pollutants on AM is an issue to be considered in remedying polluted soil by AM.This paper briefly reviewed the effects of different organic and inorganic pollutants on AM structure,formation and function,and discussed the possible mechanisms.Both organic and inorganic pollutants could have detrimental effects on AM structure,formation and function,such as low spore germination,colonization rate,and hyphal growth.Organic pollutants indirectly affect the activity of AM fungi through affecting the carbohydrates allocation from plant to the fungi,while heavy metals directly inhibited the activity of AM fungi.
Latest Achievements on Climate Change and Forest Interactions in a Polluted Environment  [PDF]
Giulia Carriero, Juha-Pekka Tuovinen, Nicholas Clarke, Giorgio Matteucci, Rainer Matyssek, Gerhard Wieser, Teis Norgaard Mikkelsen, Richard Fischer, Pavel Cudlin, Yusuf Serengil, Fabio Boscaleri, Carlo Calfapietra, Zhaozhong Feng, Elena Paoletti
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.43026
Abstract:

The COST Action FP0903 “Climate Change and Forest Mitigation and Adaptation in a Polluted Environment (MAFor)” involved 29 countries and created a platform for information exchange with experts from different fields, with the following main objectives: 1) to increase understanding of the state and potential of forest mitigation and adaptation to climate change in a polluted environment and 2) to reconcile process-oriented research, long-term monitoring and applied modelling at comprehensive forest research sites. In particular, MAFor translated the existing European knowledge on climate and air pollution dynamics into prospects for forest research and monitoring, with focus on the carbon, ozone, nitrogen and water budgets. The aim of this paper is to summarize scientific activities and achievements of MAFor: the creation of a meta-database for highlighting the available data and integrating the information from European forest research/monitoring networks; the development of a new concept of forest sites for research and monitoring (Supersites); the identification of the main knowledge gaps; and the definition of priorities for forest adaptation to climate change in a polluted environment. The action also increased European capacity building in this sector by organizing five conferences, granting 64 short-term scientific missions, organizing four training schools and publishing more than 100 papers.

Study on purification of nitrogen and phosphorous in Deyeuxia angustifolia simulated experiment in Sanjiang Plain,China
三江平原小叶章模拟实验对氮磷的净化

XU Hongwei,WANG Xiaoke,OUYANG Zhiyun,FENG Zhaozhong,
徐宏伟
,王效科,欧阳志云,冯兆忠

生态学报 , 2005,
Abstract: It is important to better understand the nutrient distribution and circulation of the Deyeuxia angustifolia wetland in Sanjiang Plain, as this ecosystem plays a unique role in the ecological service functions of the region. However, little attention has been paid to the purification function of the wetlands in the Sanjiang Plain. Due to the agricultural exploitation since 1950's, over-fertilization has resulted severe in non-point pollution in the region. A potted plant experiment was conducted in Sanjiang Plain in 2004 to investigate the process and regulation of N and P purification of Deyeuxia angustifolia. Six levels of N and P input concentrations were set up, each for three repetitions. The water, soil, and plants were re-sampled, and TN and TP concentration in them were determined and analyzed.Results showed that the removal rate of N and P presents negative exponential increasing with time in a simulated ecosystem of Deyeuxia angustifolia. The highest removal rate of N and P was 93.26% and 98.98% in the early period of experiment, respectively. One reason is that Deyeuxia angustifolia grows quickly, and absorbs significant N and P. The other reason is that N and P content in soil is originally lower, and significant N and P can be absorbed through some routes. During the purification process, the purification role of N was promoted, while the purification decay extent was decreased through input of P. However, the purification role of P was not affected by input of N. Based on the distribution and circulation of N and P in the simulated ecosystem of Deyeuxia angustifolia, the vegetable sub-system was vital to the purification role of N, while soil sub-system played an important role in the purification of P. The purification effect of N and P was made apparent across the whole simulated ecosystem, where the purifying rate was 53.11% and 58.95%, respectively. This study can provide the scientific basis for understanding the purification function in the wetlands of the Northeastern region and in planning for the effective control of the non-point pollution.
Combined impact of ozone and simulated acid rain on gas exchange, growth and yield of field-grown winter wheat
臭氧和模拟酸雨对冬小麦气体交换、生长和产量的复合影响

ZHENG Qiwei,WANG Xiaoke,FENG Zhaozhong,FENG Zongwei,OUYANG Zhiyun,
郑启伟
,王效科,冯兆忠,冯宗炜,欧阳志云

环境科学学报 , 2007,
Abstract: 为探明酸雨和臭氧(O3)对作物是否存在复合影响,运用田间原位开顶气室研究了pH4.0模拟酸雨(SAR)和O3对冬小麦气体交换、生长和产量的影响.该实验包括3种处理:CF处理采用经活性炭过滤后的空气,作为对照;CF100处理采用经活性炭过滤后的空气加人恒定浓度为100 nL·L-1的O3;CF100 SAR处理为在CF100的基础上对冬小麦喷施pH 4.0模拟酸雨,喷施量为150 mL·m-2,每10d一次.结果表明:①CF100和CF100 SAR组冬小麦叶片细胞膜系统受到破坏,光合色素含量和气体交换参数降低,抑制了作物生长,导致生物量和产量下降.与CF相比,CF100和CF100 SAR处理下冬小麦产量分别降低了68.2%和63.6%;②与CF100组相比,CF100 SAR组对冬小麦细胞膜系统和叶绿素a含量产生显著的复合影响(p<0.05),而对叶绿素b和类胡萝卜素含量、气体交换、小麦生长、生物量和产量的复合影响不显著.
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