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Influence of night-time light pollution on the photosynthesis and physiological characteristics of the urban plants Euonymus japonicus and Rosa hybrida

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Ecological Processes 2023年第1期12卷 534-544页

作者： Yaxi Wei Zhen Li Jiaolong Zhang Dan Hu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Department of Water Ecology and Environment China Institute of Water Resources and Hydropower ResearchBeijing 100038China

Background Night-time light pollution(NLP),which breaks the natural cycle of day and night,has become a new threat to urban *** are the main component of urban ecosystems and play an irreplaceable role in maintaining urban ecological *** effects of NLP with various radiation sources,including green,white,blue and red light provided by light-emitting diodes,on urban plants,Euonymus japonicus and Rosa hybrida,were examined in a block field *** NLP caused photoinhibition and oxidative stress in plants,and the extent of the deleterious effects varied with the spectral distribution of artificial light sources and *** *** and *** were more sensitive to blue and red light,which reduced the pigment concentration,net photosynthetic rate,stomatal limit value,effective quantum yield,apparent electron transfer rate and photochemical quenching coefficient,and markedly increased the malondialdehyde content and total antioxidant ***,those negative effects under white light were only present in *** and not in ***,blue and red light significantly decreased the stomatal conductance of *** contrast,green light had no significant effect on the above indices for both *** spectra did not significantly change the sugars and starch contents for either *** Considering that the spectral distribution of artificial light at night in cities has great heterogeneity and that its effect varies with plant species,it is important to arrange tree species with NLP tolerance and install appropriate light sources in urban areas based on the corresponding physiological responses and adaptation of urban trees.

关键词： Light pollution Urban plant Spectra Photosynthetic parameter physiological characteristics

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Effects of cerium nitrate on the growth and physiological characteristics in Cyclocarya paliurus seedlings

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Journal of Rare Earths 2015年第8期33卷 898-904页

作者：谢寅峰李颖刘娜娜张颖颖郭楠王涛尚绪岚 Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry University

Field studies were conducted to examine the effects of cerium on the growth and physiological characteristics of Cyclocarya paliurus seedlings by spraying the foliage with different concentrations of cerium nitrate. Optimal concentrations of cerium nitrate improved the relative growth yield of seedling height and stems and the soluble protein and sugar content of the leaves. Cerium nitrate also increased the concentration of secondary metabolites including triterpenoids, quercetin and kaempferol, mineral elements K, P, Mg, Mn, Fe and Cu, and the activities of superoxide dismutase （SOD）, peroxidase （POX）, and phenylalanine ammonia-lyase （PAL） in the leaves. The effects of cerium nitrate on these indices were dose dependent. A concentration of 0.20 mmol/L was optimal to promote the relative growth yield of seedling height, contents of soluble sugar, kaempferol, K, P, Cu, and activities of PAL, SOD, and POX, significantly increased by 54.61%, 14.71%, 55.19%, 105.2%, 74.5%, 133.3%, 80.48%, 25.35% and 22.54%, respectively, as compared with the control. However, the maximal increase in relative growth yield of stems, contents of triterpenoid, quercetin, Mg, Mn, and Fe was attained at 1.00 mmol/L treatment, which significantly increased by 87.00%, 80.56%, 452.44%, 93.2%, 29.4%, and 133.9%, respectively, compared with control check （CK）. Correlation analysis revealed positive relationships between activities of PAL, SOD and contents of triterpenoid, quercetin and kaempferol within a certain concentration range of cerium nitrate. These resuits suggested that an appropriate concentration of cerium not only was effective in the improvement of physiological function of C. paliurus, but also increased seedling resistance. Moreover, it stimulated the synthesis of medicinal components in leaves.

关键词： Cyclocaryapaliurus cerium nitrate growth physiological characteristics secondary metabolites rare earths

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Effects of different nitrogen forms and concentrations on seedling growth traits and physiological characteristics of Populus simonii × P. nigra

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Journal of Forestry Research 2022年第5期33卷 1593-1606页

作者： Zhongye Liu Wei Li Zhiru Xu Huihui Zhang Guangyu Sun Heng Zhang Chuanping Yang Guanjun Liu State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Life Science Northeast Forestry UniversityHarbin 150040People’s Republic of China

Numerous growth and physiological variables of 3-week-old Populus simonii × *** seedlings were assessed after treatment with either nitrate nitrogen(NO_(3)^(−)--N)(0.1,0.5,1,5,or 10 mmol·L^(−1)) or ammonium nitrogen(NH_(4)^(+)+-N)(0.1,0.5,1,5,or 10 mmol·L^(−1)) to determine the best nitrogen form and concentration to optimize growth,biomass allocation,pigment content,and photosynthetic *** results of combining membership function and an evaluation index suggested that,5 mmol·L^(−1) nitrogen,regardless of the form,yielded the highest comprehensive evaluation index and good *** addition,a Pearson correlation analysis and network visualization revealed that the total mass,shoot mass,root mass,leaf dry mass,plant height,leaf area,chlorophyll a and total chlorophyll had a physiological index connectivity degree≥15 for both nitrogen *** photosynthetic rate,stomatal conductance,transpiration rate,maximum photochemical efficiency of PSII,total nitrogen content,ground diameter,chlorophyll b,and carotenoid were unique indices for evaluating NH_(4)^(+)+-N-based nutrition,which could provide a theoretical basis for evaluating the effects of nitrogen fertilizer on seedlings,cultivation periods,and stress tolerance in ***× ***.

关键词： Nitrogen form Nitrogen concentration Growth traits physiological characteristics

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physiological characteristics of Nitrogen Nutrition in Peanut and Efficient Nitrogen Application Technology

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Asian Agricultural Research 2022年第7期14卷 47-50页

作者： Chunxiao WANG Changsong JIANG Ke ZHAO Xiaoping ZHANG Zhengfeng WU Yongmei ZHENG Tianyi YU Yaping ZHENG Yantai Academy of Agricultural Sciences Yantai 265500China Haiyang City Agricultural Technology Extension Center Haiyang 265100China Sichuan Agricultural University Ya'an 625014China Shandong Peanut Research Institute Qingdao 266100China

Nitrogen plays a very important role in peanut nutrition and *** peanuts,the nitrogen nutrition comes from root nodules,soil and fertilizer,which are separately referred to as root nodule nitrogen,soil nitrogen and fertilizer *** research obtained following findings.(ⅰ)The nitrogen supply ratio of the three nitrogen sources for peanut is about 5∶3∶*** are significant differences in the nitrogen supply capacity of the three nitrogen *** root nodules have the largest variation in nitrogen fixation and have a high potential for *** fixation in root nodules is closely related to carbon metabolism indicators such as photosynthesis in peanut *** application could increase the accumulation of three nitrogen sources,and the increase in nodule nitrogen accumulation is greater than that of soil nitrogen and fertilizer nitrogen.(ⅱ)Nitrogen fertilizer has a significant effect on nitrogen nutrition of *** forms of nitrogen fertilizers,such as amide nitrogen,ammonium nitrogen,nitrate nitrogen and mixed ammonium nitrate nitrogen,have significant effects on nitrogen metabolism and nitrogen accumulation in *** nitrogen fertilizer is beneficial to improving the activity of enzymes related to nitrogen metabolism and nitrogen ***-release fertilizer can significantly increase the content of soluble protein and improve the activities of NRase,GDH,GS,GPT,*** roots and leaves at the pod setting and mature stages of peanuts,which is favorable for delaying the plant senescence and increasing the yield of *** application of common nitrogen fertilizer and slow-release fertilizer can increase the soil nitrate nitrogen level at the later growth stage,which is beneficial to the development of the root system at the later stage of growth,increasing the distribution ratio of nitrogen in the pods,and also favorable for increasing the yield and nitrogen utilization rate.(ⅲ)Increa

关键词： Peanuts Nitrogen physiological characteristics Efficient fertilization

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Effects of Crop Rootzone Non-Pressure Subirrigation on Tomato physiological characteristics, Yield, and Quality

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Agricultural Sciences in China 2007年第6期6卷 673-681页

作者： WANG Yan CAI Huan-jie CHEN Xin-ming ZHENG Jian WANG Jian College of Water Resources and Architectural Engineering Northwest A＆F University Yangling 712100 P.R.China Tatim University Ala 843300 P.R.China

The purpose of this article is to study the effects of different water elevations of non-pressure subirrigation on some indexes of tomato, including soil water status around crop rootzone, morphological indexes, physiological indexes, photosynthetic indexes, yield, quality, and water use efficiency. With the tomato materials of Dongsheng 1, the irrigation experiment was carried out in the greenhouse, and significance analysis was done on the experiment data through the software of DPS. The results showed that different water elevations, had significant influence on the growth, yield, and quality of tomato. The yield of the 6-cm treatment was the highest, the 3-cm treatment was inferior to the 6-cm treatment, and the 0-cm treatment was the lowest. However, the WUE was 0 cm 〉 3 cm 〉 6 cm. The sugar/acid and soluble protein was the highest under the 0-cm treatment, and the content of ascorbic acid did not decrease considerably. When compared to the 0-cm treatment, the ascorbic acid content of 6-cm and 3-cm treatment increased by 19.2 and 6.8%, respectively. These irrigation methods can satisfy the requirements of tomato growth; different water elevations have different influences on the tomato soil water status around crop rootzone, the physiological characteristics, and yield. It also harmonized the percentage between sugar and acid, increased the content of soluble protein and ascorbic acid, and made tomato more delicious. The irrigation methods can improve the quality of tomato by water control, which is worth promoting in the agricultural production.

关键词： non-pressure subirrigation tomato growth physiological characteristics yield quality

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physiological characteristics changes of Aesculus chinensis seeds during natural dehydration

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Journal of Forestry Research 2006年第2期17卷 103-106页

作者：喻方圆杜艳沈永宝南京林业大学森林资源与环境学院南京210037

A study was conducted to determine the physiological characteristics changes of Aesculus chinensis seeds during natural dehydration in 2003. The results showed that A. chinensis seeds were recalcitrant with being highly desiccation-sensitive. The seed moisture content of fresh fruits was higher than 60%. When the seeds were naturally dried for 30 days, their moisture content declined to 30.2% and their viability was completely lost. The seed germination percentage had a small increase at the beginning of desiccation and then decreased rapidly. The relative electrical conductivity of the A. chinensis seeds increased along with a decrease in seed moisture content. However, there was an abnormal increase in relative electrical conductivity when the seed moisture content was between 53.7% and 50.9%. Superoxide dismutase （SOD） activity decreased rapidly in the period of desiccation except for an abnormality when the seed moisture content was between 53.7% and 50.9%. Malondialdehyde （MDA） content increased slowly at the early stage of desiccation and then rose rapidly after the moisture content was below 50.9%. The soluble sugar content in seeds slowly increased with the increasing period of desiccation. The seed germination percentage was at the high level when seed moisture content was in range of 47%- 60%, which suggests that this was the optimum moisture content for maintaining A. chinensis seed viability.

关键词： Aesculus chinensis Seeds Air drying physiological characteristics Seedmoisture content Seed germination percentage Superoxide dismutase (SOD) activity Malondialdehyde(MDA) content Seed electrical conductivity

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Effect of Low Concentration of Yttrium on physiological characteristics of Cucumber (Cucumis Sativus L.)

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Journal of Rare Earths 2007年第S2期25卷 236-241页

作者：王烁陈丹秦兆江董振宇鞠明超解冰凝 Department of Chemical and Biological Science Tianjin Normal University

There is no doubt that rare earth elements stand an important position among the essential elements of plant growth and it is long time since they are first used as plant growth promoters. Given their effects on microstructure, most reports are focused on the toxicology rather than promotion. Using cucumis sativus L. (Jin Chun No.5) as experiment material, we try to find out the nutritional effects of low Y3+ concentrations on cucumber seedlings′ leaves. The present paper suggests that the rare earth elements act as micronutrients at low concentrations while they give rise to toxicity at high concentration. Benefits defeat toxicity with concentration ranging from 5 to 25 μmol·L-1. Through careful study, at the Y(NO3)3 concentration of 10 μmol·L-1 the content of chlorophyll as well as the activities of SOD, Cu-Zn SOD and the POD are the highest. It indicates 10 μmol·L-1 is the optimum concentration of yttrium for promoting the cucumber growth.

关键词： rare earth elements yttrium physiological characteristics promoting effects cucumis sativus L.

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Effects of Light Quality on Growth and physiological characteristics of Neopyropia yezoensis Free Living Conchocelis

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Asian Agricultural Research 2024年第9期16卷 32-37页

作者： Cuicui TIAN Qinqin LU Yinyin DENG Chuanming HU Wei ZHOU Guangping XU Jiangsu Marine Fisheries Research Institute Nantong 226007China

[Objectives]To study the differences of growth rate,morphology,ultrastructure,pigment content and antioxidant enzyme activity of free-living conchocelis of cultivated type of Neopyropia yezoensis under different light qualities(white,red,blue,and green light).[Methods]The study was carried out through light quality design and culture,growth rate determination,microstructure and ultrastructure observation,chlorophyll a content and carotenoid content determination,phycobiliprotein content determination,malondialdehyde(MDA)content determination,superoxide dismutase(SOD)activity determination.[Results]After 21 d of culture,the specific growth rate(SGR)and chlorophyll a content of free-living conchocelis of *** were significantly increased by white light(WL),followed by red light(RL)and green light(GL),and they were the lowest under blue light(BL).Compared with the WL group,the BL group had the highest content of phycoerythrin(PE),and the RL and GL groups had the highest content of phycocyanin(PC).The algal body of WL group was normal black brown,and the cell wall was the *** RL and GL groups,the algal bodies were green,and their diameters and cell wall thicknesses were similar to those in WL *** BL group,the algal body was bright red,the diameter was the smallest,the cell wall was the thinnest,and the ultrastructure showed that the number of plastoglobulus on the thylakoid was the *** BL irradiation,the highest MDA content and the lowest SOD activity were *** results revealed that WL is the most beneficial to the growth of free-living conchocelis,followed by RL and GL,while BL has adverse effects.[Conclusions]This study explored the most suitable light quality conditions for the propagation of free-living *** is expected to provide germplasm guarantee for the production and seedling of ***.

关键词： Neopyropia yezoensis Free-living conchocelis Light quality Growth physiological characteristics

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Effect of Shading on Growth and physiological characteristics of Alfalfa, Medicago sativa

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Animal Husbandry and Feed Science 2016年第2期8卷 98-101页

作者： Shi Jing Chen Benjian Lan Xi Yin Guoli Yao Na Yi Xianfeng Wei Jinyi Guangxi Institute of Animal Science Nanning 530001 China College of Pratacultural Science Gansu Agricultural University Lanzhou 730070 China

In order to select the suitable alfalfa varieties for the shade areas in vineyard of Northwest, four shasing treatments Ro, R1 , R2, R3 （ full light, 60% of full light, 30% of full light, 10% of full light） were set in the experiment to study the growth and physiological characteristics of seven domestic and foreign alfalfa varieties. The results showed that there was a big difference in height of alfalfa among cuhivars under shading; leaf area, leaf dry weight and leaf number reduced significantly with the decrease of light intensity （ P 〈 0.05 ） ; relative growth ratio, soluble sugar content, chlorophyll a/h decreased with the increase of shading in- tensity. The first harvest yield decreased significantly with the increasing shading intensity, AmeriStand and Queen declined less than others. In summary, the suit- able alfalfa cultivars for plantation were Queen, Alfalfa and AmeriStand in the northwest area where the habitat was similar with the habitat of experimental site, but due to the relativity of shading ability, the shading intensity could not exceed 50%.

关键词： Shading Alfalfa Growth physiological characteristics

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The Differences of physiological characteristics and Yield of Northern Japonica Rice in Different Nitrogen Application Patterns

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Agricultural Science & Technology 2016年第4期17卷 864-868页

作者： Yuefeng CUI Tiegang LU Guocai SUN Junru WANG Xiaoqiu WU Guiyan WANG Jian WANG Wenjia HUANG Tieling Academy of Agricultural Sciences Tieling 112616China Liaoning Vocational College Tieling 112099China

The research performed analysis on differences of physiological property and yield of Tiejing No. 11 by different nitrogen fertilization patterns. The results indicated that while the nitrogen of basal: tillering: panicle was 6 ∶3∶1, the higher amount of nitrogen improved the chlorophyll content, photosynthetic capacity, effective panicle, grain weight and yield; the medium nitrogen level had advantage under the ratio 4:3:3; nitrogen application at lategrowth stage was suitable for low or medium nitrogen level,which could increase photosynthetic capacity and optimize the yield components and increase yield; under the same ratio for basic tiller and ear fertilizer, the increase of nitrogen could improve total nitrogen uptake and protein content, decrease nitrogen physiological efficiency and milled rice and tasting, but nitrogen recovery and harvest index changes had difference; as application at late growth stage in same nitrogen rate, total nitrogen uptake and protein content increased, nitrogen physiological efficiency and milled rice and amylose content and tasting decreased, nitrogen recovery and harvest index increased under low or medium nitrogen level and decreased under high nitrogen level. Nitrogen application 210 kg/hm^2 and the ratio 4 ∶3 ∶3 of basal:tillering: panicle made the yield increase by 2.8%-11.3%, and this is the optimal mode of nitrogen fertilizer application.

关键词： Nitrogen fertilizer Japonica rice physiological characteristics Yield

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