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Search Results: 1 - 10 of 292127 matches for " physiological characteristic<br>盐胁迫 "
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Relationship between electrical impedance and physiological characteristics of wheat leaves in salt stress

LIU Xiao-hong,HUANG Ting-lin,WANG Guo-dong,ZHANG Gang,

浙江大学学报(农业与生命科学版) , 2010,
Abstract: A solution culture experiment was conducted to determine resistance and reactance of wheat leaves under NaCl stress,and the correlation between electrical impedance and physiological parameters such as protective enzyme(CAT,POD) activity,malondialdehyde(MDA),relative conductivity,moisture content and soluble sugar content was analyzed.The results show that,with increasing NaCl concentrations,extracellular resistance and relaxation time of wheat leaves increased first and then decreased,whereas intracellular...
Influence of Calcium on Alleviating NaCl-Induced Injury Effects in Arabidopsis thaliana Seedlings

ZHOU Fen,ZENG Chang-Li,

植物科学学报 , 2004,
Abstract: After sprayed with 5 mmol/L CaCl_2 solution, the seedlings of Arabidopsis thaliana were grown under 100 mmol/L NaCl stress. The decrease ranges of the chlorophyll content, the activities of superoxide dismutase(SOD), catalase(CAT)and peroxidase(POD)were less than those of the non-sprayed seedlings. The increase range of malondialdelehyde(MDA)content was lower than that of the non-sprayed seedlings. The results showed that spraying leaves with CaCl_2 solution could alleviate the salt injury effects induced by NaCl and improve the ability of various physiological activities in the A. thaliana leaves.
Effect of NaCl stress on physiological characteristics of seedlings of different pepper varieties

- , 2015,
Abstract: 【目的】测定NaCl胁迫下2种辣椒生理生化指标的变化,研究2个辣椒品种对盐胁迫响应的生理生化机制。【方法】以“强丰7301”和“秋艳”2个辣椒品种为材料,采用沙培法研究不同浓度NaCl(0(CK),50,100,150,200,250 mmol/L)胁迫对辣椒幼苗叶片丙二醛(MDA)、游离脯氨酸(Pro)含量和抗氧化酶(SOD、POD、CAT)活性的影响。【结果】当胁迫时间相同时,随着NaCl浓度的增加,2个辣椒品种幼苗叶片中的MDA和Pro含量总体呈上升趋势,抗氧化酶(SOD、POD、CAT)活性呈先升高后下降的趋势。【结论】高浓度(200,250 mmol/L)NaCl处理会使辣椒植株逐渐表现出盐害症状;在相同浓度NaCl处理下,“秋艳”的盐害程度较“强丰7301”重。
【Objective】To provide theoretical guidance for application of peppers,this experiment studied the physiological and biochemical mechanism of two pepper varieties under salt stress.【Method】Taking two pepper varieties (“Qiangfeng 7301” and “Qiuyan”) as materials and using sand cultivation method,this paper studied the effects of NaCl with different concentrations (0(CK),50,100,150,200,and 250 mmol/L) on contents of MDA and proline and activities of antioxidant enzymes (SOD,POD,and CAT) of seedlings.【Result】With the increase of NaCl concentration,the contents of MDA and proline in seedling leaves of both peppers increased,while the activities of antioxidant enzymes (SOD,POD,and CAT) increased initially and then decreased.【Conclusion】High salt concentrations(200 and 250 mmol/L) induced salt harm symptom of both pepper varieties.At same NaCl concentrations,“Qiuyan” had stronger salt harm degree than “Qiangfeng 7301”
Effects of waterlogging stress on the growth and physiological characteristics of male and female Populus cathayana seedlings

YANG Peng,XU Xiao,

植物生态学报 , 2012,
Abstract: Aims Although the influences of waterlogging disturbance on the physiology and growth characteristics of plants have been reported for many angiosperms, few studies were carried out in dioecious plants. Our objective was to explore the differences between the sexes of a dioecious species, Populus cathayana, in sex-related growth and physiological responses to waterlogging. Methods One-year-old male and female P. cathayana seedlings were grown in plastic pots in Nanchong, Sichuan Province, China and were subjected to two water regimes: control (common soil water content) and waterlogging (water level 4 cm above soil surface) for 40 days of growth. We investigated sexual differences in malondialdehyde (MDA) content, photosynthetic pigments, gas exchange characteristics, antioxidant enzyme and morphological indices at the end of the experiment. Important findings The waterlogging treatment significantly increased MDA content and number of stems with adventitious roots under water, as well as decreased net photosynthetic rate (Pn), chlorophyll content, super-oxide dismutase (SOD) activity, plant height, basal diameter, total leaf area, specific leaf area (SLA), root biomass, leaf biomass, stem biomass, total biomass and root/shoot ratio (R/S). Moreover, the waterlogging treatment significantly increased MDA content but decreased SOD activity, Pn, carotenoids (Caro) content, chlorophyll a/b ratio, SLA, root biomass and R/S in female plants, and males had higher stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr), more adventitious roots and greater plant height than females. The results indicated that morphological growth and physiological progress of the P. cathayana seedlings were seriously inhibited by the waterlogging treatment. Males may possess greater waterlogging resistance than females with higher photosynthetic capacity and number of adventitious roots maintaining plant growth under waterlogging stress.
Effects of hypergravity and salt-stress on the physiological and biochemical indices of mung bean seedlings

YANG Mei-Hong,GUO Chun-Rong,WANG Jin-Sheng,

中国生态农业学报 , 2007,
Abstract: Mung bean(Phaseolus radiatus)seeds in germination were treated with different hypergravities for different times,and 9g/kg NaCl solution was used to imitate the salt stress on mung beans tested in the experiment.The results show that germination rate and germination index decrease with hypergravity increasing.The roots activity,content of free proline and activity of superoxide dismutase(SOD)of seedlings under 3000×g treatment are significantly higher than those under 2000×g,and the difference between 4000×g and 3000×g is not significant except SOD.The contents of malondialdehyde (MDA)of seedlings of all treatments are lower than that of the control,that of 3000×g treatment is lower significantly than that of 2000×g,those of 4000×g and 3000×g are not different significantly.Under 2000×g and 3000×g hypergravity treatments,the roots activity,the content of free proline and SOD activity of mung bean seedlings increase with the time prolongation.The treatments of 4h and 3h are not different significantly,the content of MDA decreases with the time prolongation.It is concluded that the salt tolerance of mung bean seedlings is improved by hypergravity treatment of 3000×g for 4h.
南京林业大学学报(自然科学版) , 2015, DOI: 10.3969/j.issn.1000-2006.2015.06.011
Abstract: 为加快鹅耳枥在园林绿化中的应用,探究了鹅耳枥对盐胁迫的响应及其耐盐性,以2年生鹅耳枥幼苗为材料,研究6个盐分梯度(0、1、2、3、4、5 g/L)NaCl胁迫对鹅耳枥幼苗生长及生理生化特性的影响。结果表明:①盐胁迫抑制了鹅耳枥的生长,随着盐质量浓度的增大,苗高生长量、地径生长量、总干质量和相对含水量均逐渐下降; ②保护酶活性、可溶性糖含量和可溶性蛋白含量随着盐胁迫程度的增加先升高后降低; ③随着盐质量浓度的增大,叶片MDA含量、相对电导率和脯氨酸含量总体呈上升趋势,且在5 g/L盐质量浓度处理下均达到最大值。研究表明,鹅耳枥幼苗在低、中等盐含量(1~3 g/L)的环境中能够正常生长,而4~5 g/L盐胁迫时对其生长会造成损害。因此,鹅耳枥具有一定的耐盐能力,可在园林绿化中推广使用。
To explore the responses of Carpinus turczaniowii to salt stress and its salt tolerance, we studied the growth, physiological and biochemical changes of two year old C. turczaninowii seedlings stressed with six gradients of NaCl concentration(0,1,2,3,4,5 g/L). The results showed: ① The growth of C. turczaninowii was inhibited by salt stress, because the height growth,diameter growth,dry weight and relative water content of seedlings decreased with the increase of NaCl concentration. ②The protective enzymes(SOD and POD)activity, soluble sugar content and soluble protein content was increased first and then decreased; ③With the increase of salt stress, MDA content, relative conductivity and proline content increased, and reached a maximum under 5 g/L NaCl. We concluded that C. turczaninowii seedings can grow under low and moderate NaCl concentration(1-3 g/L), but its growth was inhibited under 4-5 g/L NaCl. It indicated that C. turczaninowii seedlings has certain ability of salt tolerance,and they can be used widely in the landscape
Effects of Exogenous 5-Aminolevulinic Acid on Physiological Characteristics and Secondary Metabolite Contents of Atropa belladonna L. Seedlings Under NaCl Stress

LU Ke-huan
,GUO Shuang,WEI Yue,ZHANG Cui-ping,WU Neng-biao

- , 2018, DOI: 10.13718/j.cnki.xdzk.2018.09.003
Abstract: 通过对颠茄幼苗生理特性及生物碱含量的研究,寻找提高颠茄在盐胁迫条件下的抗性能力以及提高生物碱含量的途径.采用100 mmol/L NaCl溶液和不同质量浓度5-氨基乙酰丙酸(5-ALA)溶液处理颠茄幼苗,对颠茄叶片的叶绿素含量、叶绿素荧光参数、可溶性蛋白含量、可溶性糖含量、游离脯氨酸含量、丙二醛(MDA)含量、抗氧化酶(SOD,POD)活性及莨菪碱、东莨菪碱含量进行测定.结果表明:叶面喷施5-ALA可显著(p>0.05)提高抗氧化酶活性及叶绿素含量、渗透调剂物质含量,降低盐胁迫对细胞质膜过氧化程度和PSⅡ的损伤程度,同时可提高盐胁迫下颠茄中东莨菪碱的产量,但是对莨菪碱产量的作用不明显.外源5-ALA可有效缓解盐胁迫对颠茄生长的抑制,提高其抗盐能力.
In a study reported herein, seedlings of Atropa belladonna L. were treated with NaCl solution at 100 mmol/L and 5-aminolevulinic acid (5-ALA) solution at different concentrations, and the contents of soluble sugar, free proline, malondialdehyde (MDA), hyoscyamine and scopolamine were measured, and the activities of antioxidant enzymes (SOD and POD) were determined so as to find an approach to alleviating salinity damage to A. belladonna and enhancing its alkaloid contents under NaCl stress The results showed that foliar spray of 5-ALA significantly (p>0.05) improved the activities of the antioxidant enzymes and increased the contents of chlorophyll and osmotic adjustment substances, and decreased the level of peroxidation of plasma membrane and the level of damage of PS Ⅱ. In addition, 5-ALA enhanced the scopolamine content of the seedlings under NaCl stress, but had little effect on hyoscyamine contents. In conclusion, exogenous 5-ALA can improve the resistance of A. belladonna seedlings to NaCl stress and effectively alleviate the inhibition of salt to the growth of A. belladonna plants
Physiological responses and tolerance accumulation characteristics of Tamarix ramosissima and Shepherdia argentea under cadmium stress

- , 2018,
Abstract: 【目的】研究镉胁迫对柽柳和银水牛果生长、叶片叶绿素含量、抗氧化酶活性的影响及2种植物对镉的耐受积累特征,为西部镉污染地区土壤修复提供理论依据。【方法】以柽柳和银水牛果两年生幼树为研究对象,通过向镉本底值为0.31 mg/kg的土壤添加外源镉(CdCl2·2.5H2O)的方式设置了CK(0 mg/kg)、T1(2 mg/kg)、T2(5 mg/kg)、T3(10 mg/kg)4个处理(镉添加量以纯镉计)。在试验进行至90 d 时,测定不同镉胁迫处理2种幼树功能叶叶绿素含量、株高、生物量、生理生化指标和镉含量。【结果】镉胁迫抑制了植物生长发育过程中叶绿素的合成,随镉添加量的增加,柽柳和银水牛果的叶绿素a、叶绿素b、总叶绿素含量均表现显著降低趋势,柽柳叶绿素a/b值显著降低,银水牛果叶绿素a/b值显著升高。柽柳和银水牛果的株高、生物量、耐性指数(Ti)均随土壤镉添加量的增加而下降。T1、T2、T3处理柽柳的Ti分别为67.14,51.21,35.21,均大于银水牛果的Ti(分别为58.25,45.48,27.08)。镉胁迫显著增加了柽柳和银水牛果叶片的MDA含量,同时启动了2种植物体内积极的抗氧化酶系统,SOD、POD、CAT、APX活性均在T2处理达到最大值。柽柳根部和茎部镉含量在T3处理达到最大值,分别为5.03和4.76 mg/kg,而叶镉含量在T2处理达到最大值(9.64 mg/kg);银水牛果根部、茎部、叶部镉含量在T3处理达到最大值,分别为2.58,1.44,0.50 mg/kg;银水牛果的转移系数为0.75~0.81,柽柳的转移系数为0.85~3.57。【结论】柽柳和银水牛果在土壤镉含量为5.31 mg/kg时具有较高的生长适应性和耐性,柽柳根部向地上部分转移镉的能力及地上部分积累镉的能力都远大于银水牛果,适用于镉污染区域的植物修复。
【Objective】This study investigated the response of Tamarix ramosissima and Shepherdia argentea seedlings to cadmium (Cd) to provide theoretical basis for repairing Cd pollution in western China.【Method】By adding exogenous Cd into soil with background value of 0.31 mg/kg,different Cd concentration treatments including CK (0 mg/kg),T1 (2 mg/kg),T2 (5 mg/kg),and T3 (10 mg/kg) were set up.The photosynthetic pigment contents,growth,biomass,physiological and biochemical indexes,and Cd concentrations in various parts of T.ramosissima and S.argentea seedlings were measured after 90 days.【Result】The contents of chlorophyll a,chlorophyll b and total chlorophyll in T.ramosissima and S.argentea decreased with the increase of Cd concentration,while chlorophyll a/b ratio of T.ramosissima decreased significantly,and chlorophyll a/b ratio of S.argentea increased significantly.The plant heights,biomass and tolerance indexes (Ti) of T.ramosissima and S.argentea decreased with increasing Cd content.The Ti values of T.ramosissima and S.argentea were 67.14,51.21,35.21 and 58.25,45.48,27.08 in three treatment groups,respectively.The synthesis of photosynthetic pigments during plant growth was inhibited by Cd stress.Malonaldehyde (MDA) contents of T.ramosissima and S.argentea significantly increased along with the increasing concentration of Cd and antioxidant enzyme activities of leaf of T.ramosissima and S.argentea presented same trends.Superoxide dismutase (SOD),peroxidase (POD),catalase (CAT) and ascorbate peroxidase (APX) activities raised first and then decreased with peak at T2.Cd contents in root and stem of T.ramosissima reached the peaks of 5.03 and 4.76 mg/kg at T3,and the highest Cd content in leaf was 9.64 mg/kg at T2.Cd contents in root,stem,and leaf of S.argentea reached the peaks
Effects of Salt-drought Intercross Stress on Physiological and Biochemical Characteristics of Ammodendron argenteum(Pall.)Kuntze Seedlings

ZHUANG Wei-Wei,LI Jin,CAO Man-Hang,FENG Wen-Juan,LI Ying-Ping,

植物科学学报 , 2010,
Abstract: Potted Ammodendron argenteum(Pall.) Kuntze seedlings were used to study the effects of salt-drought intercross stress on physiological and biochemical characteristics to supply the theoretical foundation for reprtroduction and cultivation.Results showed that root mass ratio,ratio of root and comb,soluble sugar content,Chl a/b,and carotenoid content increased significantly with intensified stress,and all remained at a high level under different severe stresses.In contrast,leaf mass ratio,root activity,relative water content,and chlorophyll content all decreased.Conversely,CAT activity first increased and then decreased with increasing intercross stress.Comprehensive analysis showed Ammodendron argenteum(Pall.) Kuntze seedlings had tolerance to intercross stress,which indicates that appropriate drought stress can increase seedling resistance to salt stress.
Studies on the physiological and biochemical characteristics of Guanximiyou pomelo plants under salt stress

MA Cui-Lan,LIU Xing-Hui,WANG Xiang-Ping,

中国生态农业学报 , 2007,
Abstract: Changes of physiological and biochemical characteristics of Citrus grandis Osbeck cv.Guanximiyou plants under salt stress were studied in hydroponics culture experiments.The results show that with the increase of salinity and treated time,the root vitality,relative water content(RWC),pH value of cell sap in leaves and the contents of photosynthetic pigments and amino acid decrease,but the macromolecule leakage value and the content of malondialdedyed(MDA)in leaves increase.There is a significant correlation between physiological and biochemical characteristics.The root vitality and the content of MDA in leaves are sensitive to salt stress and the decrease of root vitality may be the earliest response of Guanximiyou pomelo plants to the salt stress.
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