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Effect of Exogenous Melatonin on Seed Germination and Seedling Growth in Melon(Cucumis melo L.) Under salt Stress

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Horticultural Plant Journal 2019年第2期5卷 79-87页

作者： José Luis Casta?ares Carlos Alberto Bouzo Plant Physiology Laboratory Department of Basic Sciences Universidad Nacional de Luján Laboratory of Research in Physiology and Plant Molecular Biology Facultad de Ciencias Agrarias Universidad Nacional del Litoral

An investigation was carried out to evaluate the effect of different application forms and concentrations of melatonin on germination and initial growth of melon plants in several different salinity conditions. We evaluated germination percentage and growth of seedlings and measured total chlorophyll content, relative electrolyte leakage, peroxidase activity, root viability, proline concentration, relative water content,Na^+/K^+ratio in green parts and K^+leakage from roots. Seed germination percentage under salt stress increased with treatments of 10 and50 μmol·L^(-1) melatonin. Seed treatment and plant watering with melatonin at 50 μmol·L^(-1) improved growth parameters and plants showed higher chlorophyll content as well as better biochemical parameters than non-treated plants. Results suggest that melatonin can alleviate the effect of salt stress during seed germination and first stages of plant development.

关键词： melon melatonin salt stress germination antioxidation

Techno-economic review on storage of petroleum products in abandoned underground salt mines:A case study on underground salt mines of Sardareh region,Garmsar,Iran

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International Journal of Mining Science and Technology 2013年第6期23卷 931-936页

作者： H.Mohammadi M.Noroozi M.Eftekhari Department of Mining Engineering Shahrood BranchIslamic Azad University Faculty of Mining Engineering.Petroleum and Geophysics Shahrood University of Technology Department of Mining Engineering.South Tehran Branch Islamic Azad University

During the past few decades,along with creation of new needs,large spaces of underground mines(especially abandoned mines)have found new applications,e.g.,storage of petroleum *** of empty spaces of these mines as hydrocarbons storage facilities decreases the costs of construction of underground spaces,which can be very expensive and *** the other hand,crude oil and other hydrocarbons nowadays are one of the most important factors affecting political and a major part of the domestic economy is achieved through ***,in this paper,a feasibility study has been performed on the application of underground salt mines near the city of Garmsar on the southern edge of Alborz mountains and on the north of the central desert of *** studies of documentaries,field observations and considering technical,geometrical and defensive criterion,the most suitable abandoned underground mine for reutilization as a storage facility is selected and presented.

关键词： Abandoned mines salt Storage Hydrocarbons Garmsar

Effects of Exogenous Trehalose on the Metabolism of Sugar and Abscisic Acid in Tomato Seedlings Under salt Stress

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Transactions of Tianjin University 2019年第5期25卷 451-471页

作者： Yanchun Feng Xiuyu Chen Yulong He Xiaohong Kou Zhaohui Xue School of Chemical Engineering and Technology Tianjin University

salt stress a ects the growth and development of plants, which results in a decrease in crop quality and yield. In this study, we used tomato seedlings treated with salt and trehalose as experimental materials and analyzed them using the technique for order preference by similarity to ideal solution analysis to select the optimal trehalose concentration for treatment. We also determined the contents of sugar and abscisic acid (ABA) and detected the expression of genes involved in the metabolism of sugar and ABA by quantitative real-time PCR. Results showed that the optimal trehalose concentration was 2 mmol/L for tomato seedlings under salt stress. Exogenous trehalose decreased the starch content and increased the soluble sugar con- tent by a ecting the expression of genes related to the metabolism of starch and soluble sugar. Exogenous trehalose altered the accumulation and distribution of sugar by inducing the upregulation of sugar transporter genes. Furthermore, trehalose increased the ABA content to induce salt stress response by regulating the expression of genes related to the synthesis and metabolism of ABA. In conclusion, trehalose can e ectively alleviate salt stress and enhance salt tolerance of tomato. These ndings provide a novel perspective and a better resource to investigate the salt tolerance mechanism and a new method for alleviating salt stress in tomato.

关键词： Tomato Trehalose salt stress Sugar metabolism Sugar transporter Abscisic acid

Overexpression of a tobacco small G protein gene NtRop1 causes salt sensitivity and hydrogen peroxide production in transgenic plants

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Science China(Life Sciences) 2008年第5期51卷 383-390页

作者： CAO YangRong1,2, LI ZhiGang1,2, CHEN Tao1,2, ZHANG ZhiGang1, ZHANG JinSong1 & CHEN ShouYi1 1 National Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China 2 Graduate School of Chinese Academy of Sciences, Beijing 100039, China 1. National Key Lab of Plant Genomics Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China 2. Graduate School of Chinese Academy of Sciences Beijing 100039 China

The small GTPases of Rop/Rho family is central regulators of important cellular processes in plants. Tobacco small G protein gene NtRop1 has been isolated; however, its roles in stress responses were unknown. In the present study, the genomic sequence of NtRop1 was cloned, which has seven exons and six introns, similar to the Rop gene structure from Arabidopsis. The NtRop1 gene was constitutively expressed in the different organs whereas the other six Rop genes from tobacco had differential expression patterns. The expression of the NtRop1 gene was moderately induced by methyl viologen, NaCl, and ACC treatments, but slightly inhibited by ABA treatment, with no significant induction by NAA treatment. The transgenic Arabidopsis plants overexpressing the NtRop1 showed increased salt sensitivity as can be seen from the reduced root growth and elevated relative electrolyte leakage. The hydrogen peroxide production was also promoted in the NtRop1-trangenic plants in comparison with wild type plants. These results imply that the NtRop1 may confer salt sensitivity through activation of H2O2 production during plant response to salt stress.

关键词： small G protein NtRop1 salt sensitive hydrogen peroxide

A Study of Impacts of Global Sea Level Rise on salt Water Intrusion Into the Changjiang Estuary

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Science China Chemistry 1993年第11期36卷 1391-1401页

作者：杨桂山朱季文 Nanjing Institute of Geography & Limnology Academia Sinica Nanjing 210008 PRC

Using the methods of empirical correlation and numerical analogue computation of the longitudinal distribution of two-dimensional chlorinity and combined with the actual situation of water supply in the Changjiang Estuary, a calculation and analysis have been made in this paper of the impacts of sea level rise of 0.5—1.0 m in the Changjiang Estuary in the next century on the probabilities of hourly chlorinity of more than 100×10^(-6), 200×10^(-6) and 250×10^(-6) during the dry season st Wusong station and on the intrusion distance of the isohalines of 1×10^(-3) and 5×10^(-3) during the ebb tide stand of the dry season in the South Branch as well as on the longitudinal distribution of the chlorinity of the South Branch in the most unfavorable situation with the minimum monthly mean discharge during the special dry year.

关键词： global sea level rise salt water intrusion ehlorinity isohaline.

Increasing Fatty Acids in Rice Root Improves Silence of Rice Seedling to salt Stress

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Rice science 2019年第6期26卷 339-342页

作者： LIU Ling CHEN Jin TAN Yanning ZHOU Tianshun OUYANG Ning ZENG Jia YUAN Dingyang DUAN Meijuan Long Ping Branch Graduate School of Hunan University College of Bioscience and Biotechnology Hunan Agricultural University Hunan Academy of Agricultural Sciences State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research Center College of Agronomic Hunan Agricultural University

salt stress is one of the major abiotic stresses around the world, and salt salinity is one of the major constrains affecting rice production (Tu et al, 2014;Reddy et al, 2017). According to the statistics, more than one billion hectares of the land in the major continents are affected by salinity (Fageria et al, 2012;Zhou et al, 2018). Rice is a salt sensitive crop, considered more sensitive to salt stress during early stage (Hasanuzzaman et al, 2009). Understanding the method to improve plant salt tolerance is a potential way to enhance agriculture productivity in the future (Jing and Zhang, 2017). Polyunsaturated fatty acid (PUFA) on plasma membrane plays important roles in salt tolerance through enhancing the activity of Na^+/H^+ transporters (López-Pérez et al, 2009).

关键词： Fatty Acids in Rice Root Rice Seedling salt

Transformation of japonica rice with RHL gene and salt tolerance of the transgenic rice plant

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Chinese Science Bulletin 2002年第12期47卷 998-1002页

作者： Rongtian Li Zhongming Zhang Qifa Zhang Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Peoples R China

Overexpression of the yeast HAL2 gene increases salt tolerance of yeast and plant. Rice HAL2-like (RHL) gene was introduced into a japonica rice cultivar HJ19 with Agrobacterium tumefaciens-mediated transformation. Transgenic plants in R0 generation were selected on the principle of GUS-positive, RHL gene PCR-positive and normal growth. Hygromycin-resistant plants of some transgenic lines in R1 generation increased salt tolerance during the seedling and booting stage, being less damaged in the cy-tomembrane and stronger in leaf tissue viability under salt stress during booting period. Southern analysis of transgenic lines tolerant to salt in R1 generation showed that the RHL gene expression cassette had been successfully integrated into rice genome. Moreover, gene engineering breeding methodology and really salt-tolerant rice cultivar were discussed.

关键词： japonica rice RHL gene salt tolerance transformation.

A Deformation Breakdown Criterion of Hydrofracturing in Rock salt

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Chinese Science Bulletin 1993年第18期38卷 1552-1556页

作者：阳友奎肖长富邱贤德吴刚马建春 Resource and Environment Engineering College Chongqing University Chongqing 630044 PRC

Since it was used as a stimulating technique of oil or gas wells to raise productivity and recovery ratio in the late 1940s, the hydrofracturing technique has become an extensively adopted method of in-situ stress measurements at the great depth, because it does not require large-scale excavating but only drilling and injecting fluid with high pressure to crack rock around the borehole. Furthermore, along with the development of the solution cavity for storage in rock salt and the solution mining of rock salt deposits, geotechnical engineering circles pay more and more attention the in situ stress field of

关键词： rock salt hydraulic fracture deformation breakdown criterion.

The effect of salt stress on the chlorophyll level of the main sand-binding plants in the shelterbelt along the Tarim Desert Highway

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Chinese Science Bulletin 2008年第S2期53卷 109-111页

作者： XU XinWen XU HaiLiang WANG YanLing WANG XiaoJing QIU YongZhi XU Bo Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China Institute of Environmental Engineering Xinjiang Agricultural UniversityUrumqi 830052China Tarim Branch PetroChina Company LimitedKorla 841000China

Based on the fact that only high saline water irrigated to the shelterbelt along the Tarim Desert Highway, the experiment about three species with six degree of salinity was carried out to analyze the relation between chlorophyll content and salt stress. The results show that: (1) the chlorophyll content of tree species decreases with aggravating the salt stress, which explains that salt stress can affect chlorophyll accumulation of three plants; (2) from chlorophyll content with different salinity, the chlorophyll content of three shrubs also has twice obvious decrease, which indicates that some plants adapt to salt stress. We divided salt resistance of the plant into three grades, namely the slight salt resistance, the heavy salt resistance and the extreme salt resistance; and (3) according to the experimental results, the salt stress of each plant was divided, which can provide theoretical guidance for constructing the shelterbelt along the Tarim Desert Highway.

关键词： artificial shelterbelt sand-binding plants salt stress chlorophyll