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physiological indices and Selection of Methods on Rapid Identification for Sweet Potato Drought Resistance

Agricultural Sciences in China 2005年第11期4卷 826-832页

作者： ZHANG Ming-sheng TAN Feng ZHANG Qi-tang YANG Yong-hua School of Life Sciences Nanjing University Nanjing 210093 P.R.China School of Agronomy Guizhou University Guiyang 550025 P.R.China School of Life Sciences Southwest China Normal University Chongqing 400715 P.R.China

The relationships between the changes of relative water content （RWC）, malondialdehyde （MDA） contents, superoxide dismutase （SOD） activity and free proline contents in sweet potato leaves, and drought resistant ability under different concentration of polyethylene glycol （PEG） treatment applied at rhizosphere of sweet potato seedlings were studied. A highly positive correlation between RWC and drought resistance （r =0.783, P〈0.01）, a highly negative correlation between MDA contents and drought resistance （r = -0.848, P〈0.01）, a highly positive correlation between SOD activity and drought resistance （r = 0.777, P〈0.01） was observed. Free proline contents in leaves was not related obviously to the sweet potato drought resistance under 25% PEG treatment. The stronger the drought resistance of variety, the less decrease of RWC and increase of MDA contents, the more increase of SOD activity. By determining these physiological indices in sweet potato leaves under 25% PEG treatment, rapid identification of drought resistant ability of different varieties can be obtained in the lab.

关键词： Sweet potato Drought resistance Water stress physiological indices Drought-resistance coefficient

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The effect of secondary task on driving performance,physiological indices and mental workload:A study based on simulated driving

The effect of secondary task on driving performance,physiolo...

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第一届交通运输工程国际学术会议

作者： Yan Ge 1 2 Xianggang Xu1 2 Jing Li1 2 Xiuling Lu 1 2 and Kan Zhang1 1 State Key Laboratory of Brain and Cognitive Science Institute of Psychology Chinese Academy of Sciences Beijing 100101 China 2 Graduate University of Chinese Academic of Sciences Beijing 100049 China

In this study, simulated driving program was adopted to get the effects of secondary task and driving experience on driving performance, physiological indices and subjective evaluations of mental workload （MWL）. The results showed that the difficulty of secondary task influenced driving performance, physiological indices and MWL. The drivers’ mental workload increased and driving performance decreased along with the increase of secondary task’s difficulty. physiological indices reflected drivers’ tension, which could be used as effective indices of monitoring drivers’ condition. Besides, experience also influenced driving performance. This study provided academic support for developing devices monitoring drivers’ physiological and psychological conditions.

关键词： Secondary Task Driving Performance physiological indices MWL

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physiological evaluation of nitrogen use efficiency of different apple cultivars under various nitrogen and water supply conditions

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Journal of Integrative Agriculture 2020年第3期19卷 709-720页

作者： WANG Qian LIU Chang-hai HUANG Dong DONG Qing-long LI Peng-min Steve van NOCKER MA Feng-wang State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple College of HorticultureNorthwest A&F UniversityYangling 712100P.R.China Department of Horticulture Michigan State UniversityEast LansingMI 48824USA

Nitrogen(N) deficiency is a common problem for apple(Malus×domestica) production in arid regions of China.However,N utilization efficiency(NUE) of different apple cultivars grown under low N conditions in arid regions has not been evaluated.In this study,NUE was assessed for one-year-old seedlings of six apple cultivars,Golden Delicious,Qinguan,Jonagold,Honeycrisp,Fuji and Pink Lady,grafted onto Malus hupehensis Rehd.rootstocks.Four treatments were used,including control water with control N(CWCN),limited water with control N(LWCN),control water with low N(CWLN) and limited water with low N(LWLN).Our results showed that growth indices such as biomass,plant height and stem diameter,and photosynthetic rate of all cultivars decreased in the order CWCN>CWLN>LWCN>LWLN.When subjected to LWLN treatment,Qinguan showed better growth and photosynthetic characters than other tested cultivars.Additionally,Qinguan and Pink Lady had higher NUE,while Honeycrisp and Jonagold had lower NUE,based on the determination of biomass,photosynthetic parameters,chlorophyll content,the maximal photochemical efficiency of PSII(Fv/Fm),15 N and N contents.

关键词： apple drought N deficiency physiological indices 15N-labeling NUE

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Land rehabilitation improves edaphic conditions and increases soil microbial biomass and abundance

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Soil Ecology Letters 2020年第2期2卷 145-156页

作者： Dong Liu Baorong Wang Parag Bhople Fayzmamad Davlatbekov Fuqiang Yu CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650224China SWFU-KIB CAS Joint Institute for Applied Mycology Kunming 650224China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China Department of Soil Biology and Plant Nutrition Faculty of Organic Agricultural SciencesUniversity of KasselNordbahnhofstr.1a37213 WitzenhausenGermany College of International Education Northwest A&F UniversityYangling 712100China

Rehabilitation of farmland improves the local eco-environmental conditions.But to what extent this transformation influences soil microbial properties is less known.In our study we compared variations in soil microbial attributes following changes in land-use types to understand the influence of altered soil properties on microbial biomass and their community structure using chloroform fumigation extraction method and phospholipid fatty acid(PLFA)analysis.For this purpose,3 agricultural(AL)(farmland,apple orchard and 2 years abandoned land)and 4 rehabilitated lands(RL)of various vegetations grassland,shrubland,mixed forest(Amorpha fruticosa and Pinus tabuliformis Carr.)and forest(Robinia pseudoacacia)were selected.Our results showed higher soil organic carbon(SOC)contents in RL soils(forest>mixed forest>grassland>shrub land)than that in AL soils.In RL soils,soil microbial biomass and abundance of group specific PLFA were significantly higher than those in AL soils.Under different land-use types,microbial community was bacteria dominated over fungi.The microbial physiological indices(G^(+)/G^(-),cyc/prec and S/M)indicated decreased environmental stress in RL soils in comparison with AL soils.In loess soils,SOC and total N correlated positively(p<0.05)with microbial biomass C,N and P and also with fungal and bacterial PLFA,indicating a positive microbial mediation in improving soil fertility.Taking together,our findings suggest that land rehabilitation,especially Robinia pseudoacacia planation,improves overall edaphic conditions and accelerates soil microbial biomass accumulation in local regions.

关键词： Land-use change Soil microbial carbon Chloroform fumigation extraction PLFA physiological indices

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NaCl胁迫对转甜菜碱醛脱氢酶基因美丽胡枝子生理的影响(英文)

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Agricultural Science & Technology 2008年第6期9卷 146-150页

作者：杨晓红陈晓阳隗晓丹王颖周伟李守菊北京林业大学林木花卉遗传育种教育部重点实验室北京农学院园林系华南农业大学林学院

[Objective] The aim of this study was to explore the effects of exogenous gene introduction on osmotic adjustment of plants.[Method] After pot culture with same time,the transgenic plants expressing betaine aldehyde dehydrogenase gene(BADH)and non-transgenic plants of Lespedeza formosa were treated with different concentrations(0,0.5%,1.0%,2.0%)of NaCl solution for 30 h and some physiological indices including proline,betaine,soluble sugar,malondialdehyde(MDA)contents and superoxide dismutase(SOD)activity were assayed.[Result] There was no significant difference on the indices mentioned above between transgenic plants and non-transgenic plants under the salt-free treatment.With the increase of NaCl concentration,the transgenic plants accumulated much higher level of proline,betaine,soluble sugar and lower level of MDA than non-transgenic plants.But the differences of SOD activity increase degrees between transgenic and non-transgenic plants were not significant.Performances of the three transgenic lines were different to some extent.[Conclusion] The introduction of exogenous BADH gene enhanced the osmotic adjustment ability of L.formosa,furthermore;different transgenic lines performed differently.

关键词： Lespedeza formosa BADH gene NaCl stress physiological indices

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