Jian Sun

Shanghai Meteorological Bureau

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Ji Fu Yin

Nanjing University of Information Science and Technology

Rui Fang

Anhui Normal University

Michael C. Dietze

Boston University

D. Turley

Central Forensic Science Laboratory

Yaoyao Zheng

University of Nottingham

Li Jian

Nanchang Hangkong University

Long Jirui

State Key Laboratory of Hybrid Rice

Jingxin Xu

Nanjing University of Information Science and Technology

X. H. Feng

Youfei Zheng

Jiangsu Institute of Meteorological Sciences

Cooperative Institutions

Nanjing University of Information Science and Technology

China Meteorological Administration

University of Illinois Urbana-Champaign

State Key Laboratory of Hybrid Rice

China National Hybrid Rice R&D Central Hunan Hybrid Rice Reserch Center

Jiangsu Institute of Meteorological Sciences

Chinese Academy of Sciences

Energy Biosciences Institute

Chinese Academy of Agricultural Sciences

State Key Laboratory of Pollution Control and Resource Reuse

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Liberating photoinhibition through extracellular extraction of photosynthetic electrons in anoxygenic phototrophic bacteria

Chemical Engineering Journal (2025)

Jian Sun Rui Fang Rui Chen Yaoyao Zheng Yong Yuan

Anoxygenic photosynthesis

Photoinhibition

10.1016/j.cej.2025.160495

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[Effects of reduced solar radiation on winter wheat flag leaf net photosynthetic rate].

PubMed (2011)

Youfei Zheng Yanli Ni B. Mai Rongjun Wu Feng Yan

Taking winter wheat Triticum aestivum L. (cv. Yangmai 13) as test material, a field experiment was conducted in Nanjing City to study the effects of simulated reduced solar radiation on the diurnal variation of winter wheat flag leaf photosynthetic rate and the main affecting factors. Five treatments were installed, i. e., 15% (T15), 20% (T20) , 40% (T40), 60% (T60), and 100% (CK) of total incident solar radiation. Reduced solar irradiance increased the chlorophyll and lutein contents significantly, but decreased the net photosynthetic rate (Pn). Under different solar irradiance, the diurnal variation of Pn had greater difference, and the daily maximum Pn was in the order of CK > T60 > T40 > T 20 > T15. In CK, the Pn exhibited a double peak diurnal curve; while in the other four treatments, the Pn showed a single peak curve, and the peak was lagged behind that of CK. Correlation analysis showed that reduced solar irradiance was the main factor affecting the diurnal variation of Pn, but the physiological parameters also played important roles in determining the diurnal variation of Pn. In treatments T60 and T40, the photosynthesis active radiation (PAR), leaf temperature (T1) , stomatal conductance (Gs) , and transpiration rate (Tr) were significantly positively correlated with Pn, suggesting their positive effects on Pn. The intercellular CO2 concentration (Ci) and stomatal limitation (Ls) had significant negative correlations with Pn in treatments T60 and T40 but significant positive correlations with Pn in treatments T20 and T15, implying that the Ci and Ls had negative (or positive) effects on Pn when the solar irradiance was higher (or lower) than 40% of incident solar irradiance.

Stomatal Conductance

Diurnal temperature variation

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Submergence Impacts on Selected Wetland/Bottomland Tree Species.

Jian Sun

Flooding is a common natural stress occurring in wetland/bottomland forests. Submergence, total immersion, is a special case of flooding, which has received limited attention in the literature. This study provides information on the impacts of three submergence treatments on three bottomland tree species. The results indicated that submergence would inhibit shoot and root growth for the three tested species during the submergence period. However, the survival of these species under submergence conditions were different. Taxodium distichum (L.) Rich survived even after 30 days of water coverage and survival continued to be high during the recovery period. Quercus nuttallii Palmer was a moderately submergence tolerant species with most seedlings able to survive 20 days of submergence treatment. Quercus michauxii Nutt. was the least submergence tolerant species with high mortality occurring after submergence for only 20 days. During the recovery stage, the rapid resumption in root growth, and shoot growth of baldcypress was indicative of its tolerance to submergence impacts. However, the two oak species responded with inhibited growth of both shoots and roots. Physiological responses measured after de-submergence such as photosynthetic rates did not yield significant or consistent differences related to apparent submergence tolerance of these species. Two stress tolerance indices were developed to provide a quantitative means of describing the submergence tolerance for the three tested species. These indices appear to provide information consistent with cluster analysis. They also provide a quantitative ranking of stress tolerance, potentially useful in models of species change related to stress levels in the environment.

Taxodium

Cypress

10.31390/gradschool_disstheses.5931

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Impacts of canopy position and nitrogen on nitrogen allocation and photosynthesis of switchgrass (Panicum virgatum L.).

Aspects of applied biology (2011)

D. Wang Mathew W. Maughan Jian Sun X. H. Feng Fernando E. Miguez

Panicum virgatum

Panicum

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[Observation of ozone dry deposition in the field of winter wheat.]

PubMed (2016)

Shuo Li You Fei Zheng Rong Jun Wu Ji Fu Yin Jing Xu

Ozone is one of the main atmospheric pollutants over surface layer, and its increasing surface ozone concentration and its impact on main crops have become the focus of the public. In order to explore ozone deposition law and environmental factors influencing ozone deposition process, this study used the micrometeorological methods and carried out the experiment under natural conditions. The results showed that during the observational period (the vigorously growing season of wheat), the mean value of ozone flux was -0.35 μg·m-2·s-1(the negative sign indicated that the deposition direction was toward the ground). The mean rate of ozone deposition was 0.55 cm·s-1. The mean value of aerodynamic resistance was 30 s·m-1, the mean value of sub-layer resistance was 257 s·m-1, and that of the canopy layer stomatic resistance was 163 s·m-1. All the test parameters presented distinct diurnal fluctuation. The ozone deposition resistance was influenced by friction velocity, solar radiation velocity, temperature, relative humidity and other factors.地表臭氧作为近地层最主要的大气污染物之一,其不断上升的浓度及其对粮食作物的影响受到越来越多的关注.本研究利用微气象学观测方法,探明自然条件下冬麦田的臭氧沉降过程,分析了影响臭氧沉降过程的环境因子.结果表明: 观测期内(小麦生长旺期)臭氧通量均值为-0.35 μg·m-2·s-1(负号表示沉降方向指向地面),臭氧沉降平均速率为0.55 cm·s-1,空气动力学阻力均值为30 s·m-1,粘性副层阻力均值为257 s·m-1,冠层阻力均值为163 s·m-1,且均存在明显的日变化趋势.臭氧沉降阻力大小受摩擦速度、太阳辐射强度、温度和相对湿度等因素的影响.

Deposition

10.13287/j.1001-9332.201606.037

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Citations (6)

Effects of Nitrogen Fertilizer Level on Chlorophyll Fluorescence Characteristics in Flag Leaf of Super Hybrid Rice at Late Growth Stage

Rice Science (2013)

Long Jirui Ma GuoHui Yi-zheng WAN Chun-fang SONG Jian Sun

Flag (linear algebra)

Nitrogen fertilizer

10.1016/s1672-6308(13)60138-9

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Citations (34)