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Effects of Lanthanum on Redox Systems in Plasma Membranes of Casuarina equisetifolia Seedlings Under Acid Rain Stress 被引量:8
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作者 李裕红 严重玲 +3 位作者 刘景春 Mohammed Almasri 梁洁 张瑞锋 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第5期577-581,共5页
The effects of lanthanum on some redox system(PMRS) properties of the plasma membrane(PM) vesicles from Casuarina equisetifolia seedlings under artificial acid rain(pH 4.5)stress were studied. The results show tha... The effects of lanthanum on some redox system(PMRS) properties of the plasma membrane(PM) vesicles from Casuarina equisetifolia seedlings under artificial acid rain(pH 4.5)stress were studied. The results show that there are NADH oxidase and EDTA Fe 3+ reductase, and nitrate reductase in the seedling PM, and they have different responses to soaking seeds for 8 h in a series of LaCl 3 solution. The NADH oxidase activities and the Nitrate reductase activities can be stimulated when La 3+ concentrations is in the range of 50~200 mg·L -1 , but their activities are inhibited or fluctuate by the higher La 3+ concentrations. The EDTA Fe 3+ reductase activities can be stimulated by La 3+ concentrations in the range of 50~400 mg·L -1 . The research also revealed that La 3+ reduces the relative permeability of membranes and have the function in protecting membranes under acid rain stress by the way of inhibiting the leakage of electrolyte. 展开更多
关键词 ECOLOGY PM redox system LANTHANUM Casuarina equisetifolia acid rain stress rare earths
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Effects of La^(3+) on ATPase Activities of Plasma Membrane Vesicles Isolated from Casuarina Equisetifolia Seedlings under Acid Rain Stress 被引量:6
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作者 李裕红 严重玲 +3 位作者 刘景春 陈英华 胡俊 薛博 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第6期675-679,共5页
The effects of La^(3+) on the growth and the ATPases activities of plasma membrane(PM) vesicles isolated from Casuarina equisetifolia seedlings under artificial acid rain(pH 4.5) stress were studied. The results show ... The effects of La^(3+) on the growth and the ATPases activities of plasma membrane(PM) vesicles isolated from Casuarina equisetifolia seedlings under artificial acid rain(pH 4.5) stress were studied. The results show that the height, length of roots, fresh weight and PM H^+-ATPase activites of Casuarina equisetifolia seedlings increase by the treatments of soaking seeds in LaCl_3 solutions with lower concentrations, and those can reach their peak values by treating with 200 mg·L^(-1) La^(3+). However, in comparison with the CK, those are inhibited by the higher La^(3+) concentrations; PM Ca^(2+)-ATPase activity is inhibited with the treatments of La^(3+). The results also reveal that the H^+-ATPase activity and the growth of cell enlarge have a remarkable positive correlation, and La^(3+) activating H^+-ATPase can facilitate plant growth. La^(3+) also can alleviate cytosolic acidification of plant under acid rain stress and indirectly maintain the stability of intracellular environment. In order to resistant to acid rain and accelerate the growth of Casuarina equisetifolia, the suitable range of La^(3+) concentrations to soak seeds for 8 h is 50~200 mg·L^(-1). 展开更多
关键词 ECOLOGY PM ATPase LANTHANUM Casuarina equisetifolia acid rain stress rare earths
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Accumulation of Rare Earth Elements in Spinach and Soil under Condition of Using REE and Acid Rain Stress 被引量:4
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作者 严重玲 洪业汤 +3 位作者 林鹏 王世杰 李心清 梁洁 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第2期132-138,共7页
The content and distribution characteristics of REE in spinach and soil under using REE and acid rain stress were studied by pot experiments. The results show that the content of REE is 0 527~0 696 (μg·g -... The content and distribution characteristics of REE in spinach and soil under using REE and acid rain stress were studied by pot experiments. The results show that the content of REE is 0 527~0 696 (μg·g -1 ) in the above ground portion of spinach, 2 668~3 003 (μg·g -1 ) in the under ground portion of spinach and 229 09~250 30 (μg·g -1 ) in the soil. With the acidity of acid rain increasing, the leaching of REE in plants and soil is strengthened and the amount of REE reduces with decreasing of pH value. After REE are used, though plants show the selective absorption to Ce group elements (especially spraying on leaves), regardless under acid rain stress or using REE or not, the distribution model of REE in the above ground and under ground portion of plants is basically the same with the control. Plants also follow the Oddo Harkins rule of the REE of distribution abundance, light rare earth elements is enriched, the minus of Eu is abnormal and admeasure of Ce is a rich model. The results show that REE in plants mainly come from soil and are affected by it. 展开更多
关键词 rare earths acid rain stress SPINACH SOIL
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UV-Vis Spectroscopy Study on Interaction between Microperoxidase-11 and Pr Ion Under Acid Rain Stress 被引量:2
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作者 吉红念 黄晓华 +1 位作者 周青 陆天虹 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第5期541-546,共6页
Interaction between rare earth ion praseodymium (Pr(Ⅲ)) and MP11 with/without hydrogen ion (H +) in different media( aqueous, phosphate buffer, physiological condition) were studied by UV Vis spectroscopy. All the ... Interaction between rare earth ion praseodymium (Pr(Ⅲ)) and MP11 with/without hydrogen ion (H +) in different media( aqueous, phosphate buffer, physiological condition) were studied by UV Vis spectroscopy. All the results indicate that Pr(Ⅲ) interacts with MP11, increasing the non planarity of porphyrin periphery, leading MP11 to form two conformations when titrated by Pr(Ⅲ). Excessive Pr(Ⅲ) acts as a contaminant in living organism. H + and Pr(Ⅲ) have antagonistic effect on MP11, suggesting that at suitable concentration under physiological conditions, Pr(Ⅲ) can be used as biomodulator in protecting plants from acid rain stress or in rehabilitating the harm. 展开更多
关键词 rare earths PRASEODYMIUM MICROPEROXIDASE-11 UV-Vis spectroscopy acid rain stress antagonistic effect
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Response of peroxidase and catalase to acid rain stress during seed germination of rice,wheat,and rape 被引量:4
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作者 Lihong WANG Xiaohua HUANG Qing ZHOU 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2008年第3期364-369,共6页
Seed germination of plants with various acid-resis tance display different responses to acid rain.To understand the reason why such differences occur,the effects of sim ulated acid rain(pH 2.5-5.0)on the activities of... Seed germination of plants with various acid-resis tance display different responses to acid rain.To understand the reason why such differences occur,the effects of sim ulated acid rain(pH 2.5-5.0)on the activities of peroxidase(POD)and catalase(CAT)during sced ger-mination of rice(O.sativa),wheat(T.aestivurm),and rape(B.chinensis var.oleifera)were investigated.R cesults indi-cated that the maximum change in activities of CAT and POD by acid rain treatment with different acidity and time in relation to the referent treatment without acid rain,was in the order:rice(28.8%,31.7%)<wheat(34.7%,48.3%)<rape(79.3%,50.0%).The pH level for which the treatment with acid rain did not cause signif-cant difference(p<0.05)was in the order:rice(3.5)>wheat(4.0)>rape(5.0).Moreover,the change in activity of POD was higher than that of CAT,which showed that POD was more sensitive to acid rain stress than CAT.The difference in the ability of POD and CAT in removing free radicals was one reason why the germina-tion indexes of these three species behaved differently. 展开更多
关键词 acid rain stress RICE WHEAT RAPE germination peroxidase(POD) catalase(CAT)
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Biological effect of rare-earth elements on anti-oxidation enzymes in wheat under acid rain stress 被引量:5
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作者 Chongling Yan Yetang Hong +2 位作者 Xianke Yang Shunzhen Fu Shanyi Wu 《Chinese Science Bulletin》 SCIE EI CAS 1999年第2期146-149,共4页
Based on pot-culture experiments, the biological effect of rare-earth elements (REE) on antioxidation enzymes of wheat under acid rain stress was studied. The results show that both acid rain and REE can affect the ac... Based on pot-culture experiments, the biological effect of rare-earth elements (REE) on antioxidation enzymes of wheat under acid rain stress was studied. The results show that both acid rain and REE can affect the activity of anti-oxidation enzymes of wheat to different extents. Under the acid rain stress, anti-oxidation enzymes (CAT, SOD) of wheat showed single peak curve with the decrease of pH values. After REE were applled, variation of activities of anti-oxidation enzymes was relatively stable and the peak value of variation curve would move in the direction of increased acidity. Under low acidity of acid rain, REE could reduce the sensitivity of anti-oxidation enzymes of wheat to acid rain stress significantly and promote the resistance of anti-oxidation enzymes of wheat to acid rain. 展开更多
关键词 acid rain stress RARE-EARTH elements WHEAT ANTI-OXIDATION enzymes.
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Responses of antioxidant enzyme and photosynthesis in rape seedling to the combined stresses of acid rain and ultraviolet-B radiation 被引量:3
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作者 LIANG Chan-juan HUANG Xiao-hua +1 位作者 TAO Wen-yi ZHOU Qing 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第6期1038-1041,共4页
Effects of the simulated acid rain(AR) and ultraviolet-B(UV-B, 280-320 nm) radiation with a single or two ways simultaneously (AR + UV-B) on the antioxidant enzyme and photosynthesis of the rape seedlings were ... Effects of the simulated acid rain(AR) and ultraviolet-B(UV-B, 280-320 nm) radiation with a single or two ways simultaneously (AR + UV-B) on the antioxidant enzyme and photosynthesis of the rape seedlings were investigated by the hydroponic culture. The results of static experiment indicated that the tolerance of rape seedling to single stress(AR or UV-B) is stronger than that to dual stresses(AR + UV-B). Furthermore, the dual stresses had additive effect on catalase activity, and a synergistic effect on MDA content, net photosynthesis rate, water use efficiency as well as intercellular CO2 concentration. Meanwhile, it has an independent effect on chlorophyll content, stomatal conductance, and transpiration rate as well as membrane permeability. During 64 h restoration course, the dynamic change in the curves of physiological and biochemical indices were not identical, and none of them show a simple linear variation. According to the static and dynamic experiments, it was found that a responsive sequence of catalase activity, membrane permeability, MDA content and photosynthetic characteristics to the above-mentioned stresses was as follows: AR + UV-B 〉 UV-B 〉 AR. 展开更多
关键词 combined stresses elevated UV-B radiation simulated acid rain rape seedling CAT activity PHOTOSYNTHESIS
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三类抗性种子萌发对酸雨胁迫响应 被引量:50
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作者 周青 曾庆玲 +3 位作者 黄晓华 张光生 梁婵娟 王丽红 《生态学报》 CAS CSCD 北大核心 2004年第9期2029-2036,共8页
实验采用 p H2 .0、2 .5、3.0、3.5、4 .0、5 .0模拟酸雨处理培养皿中的水稻 (Oryza sativa)、小麦 (Triticum aestivum)、油菜(Brassica chinensis var. oleifera) 3类抗性种子 ,每皿 5 0粒 ,置恒温培养箱内萌发 (2 5℃ ) ,每天更换 1... 实验采用 p H2 .0、2 .5、3.0、3.5、4 .0、5 .0模拟酸雨处理培养皿中的水稻 (Oryza sativa)、小麦 (Triticum aestivum)、油菜(Brassica chinensis var. oleifera) 3类抗性种子 ,每皿 5 0粒 ,置恒温培养箱内萌发 (2 5℃ ) ,每天更换 1次酸雨 ,处理与对照均 3次重复。定时测定酸雨胁迫强度、胁迫时间对种子发芽率、发芽势、发芽指数、活力指数、异状发芽率 ,吸水值、呼吸速率、贮藏物质运转效率、贮藏物质消耗率、根长抑制指数与芽长抑制指数的影响。结果表明 ,当酸雨胁迫强度 p H=2 .0~ 2 .5时 ,因胁迫强度过高 ,3类抗性种子皆不萌发 ;胁迫强度 p H≥ 3.0时 ,3类抗性种子 5项萌发指标的变幅是水稻 <小麦 <油菜 ;酸雨伤害阈值是水稻 (p H3.0~ 3.5 ) <小麦 (p H3.5~ 4 .0 ) <油菜 (p H4 .0~ 5 .0 ) ;当胁迫强度 (p H)≥ 2 .5时 ,3类抗性种子 6项生理指标的变幅是水稻 <小麦 <油菜 ,其生理反应阈值 (p H≥ 2 .0 ) <萌发反应阈值 (p H≥ 3.0 ) ;3类抗性种子贮藏物质消耗率、贮藏物质运转率 ,根长抑制指数及芽长抑制指数对酸雨胁迫时间的响应 (组间达到差异显著水平 )时间是 :水稻 (7d、7d,3d、3d)≥小麦 (6 d、6 d,3d、3d)≥油菜 (3d、4 d,3d、3d) ;3类抗性种子对酸雨胁迫强度与胁迫时间的耐受性差异 ( 展开更多
关键词 酸雨胁迫 水稻 小麦 油菜 萌发
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酸雨胁迫对亚热带典型树种幼苗生长与光合作用的影响 被引量:35
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作者 金清 江洪 +2 位作者 余树全 金静 王艳红 《生态学报》 CAS CSCD 北大核心 2009年第6期3322-3327,共6页
通过对酸雨胁迫下中国亚热带典型针叶树和阔叶树,马尾松(Pinus massoniana Lamb.)、杉木(Cunninghamia lanceolata(Lamb.)Hook.)、甜槠(Castanopsis eyrei(Champ.)Tutch.)、苦槠(Castanopsis sclerophylla(Lindl.)Schott.)幼苗的光合生... 通过对酸雨胁迫下中国亚热带典型针叶树和阔叶树,马尾松(Pinus massoniana Lamb.)、杉木(Cunninghamia lanceolata(Lamb.)Hook.)、甜槠(Castanopsis eyrei(Champ.)Tutch.)、苦槠(Castanopsis sclerophylla(Lindl.)Schott.)幼苗的光合生理研究,试图判断日益严重的酸雨是否会对中国亚热带森林产生影响,以便更好地对已退化的森林进行恢复。试验结果表明:在酸雨胁迫下,甜槠和杉木幼苗的高生长受到的影响不显著,而对马尾松幼苗的高生长有一定的促进作用;在pH4.0时,酸雨胁迫对甜槠、杉木和马尾松幼苗的地径生长有一定的促进;在不同酸雨处理下,苦槠、甜槠和马尾松幼苗的最大净光合速率随着酸雨浓度的增加而下降,说明这3种植物幼苗的光合能力受到影响,特别是阔叶树幼苗,苦槠和甜槠幼苗的最大净光合速率分别下降了30%和25%。 展开更多
关键词 酸雨胁迫 生长量 光合生理 针叶树幼苗 阔叶树幼苗
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水稻、小麦和油菜种子萌发POD与CAT对酸雨胁迫的响应 被引量:39
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作者 王丽红 黄晓华 周青 《环境科学》 EI CAS CSCD 北大核心 2005年第6期123-125,共3页
研究了pH 2.5~5.0模拟酸雨对水稻(O.sativa)、小麦(T.aestivum)和油菜(B.chinensis var.oleifera)种子萌发过程中POD、CAT活性影响.静态与动态实验结果表明,酸雨胁迫下,3类种子萌发时CAT与POD活性的变化幅度是水稻(28.8%,31.7%)<小麦(... 研究了pH 2.5~5.0模拟酸雨对水稻(O.sativa)、小麦(T.aestivum)和油菜(B.chinensis var.oleifera)种子萌发过程中POD、CAT活性影响.静态与动态实验结果表明,酸雨胁迫下,3类种子萌发时CAT与POD活性的变化幅度是水稻(28.8%,31.7%)<小麦(34.7%,48.3%)<油菜(79.3%,50.0%);CAT与POD与CK达到差异显著水平(p<0.05)的胁迫强度是水稻(pH3.5)>小麦(pH4.0)>油菜(pH5.0),说明保护酶抗酸雨能力是水稻>小麦>油菜.相同胁迫强度下,水稻、小麦和油菜种子CAT变幅<POD,说明前者对酸雨胁迫敏感性大于后者.保护酶应激清除自由基反应能力的差异是决定3类种子萌发指标趋异的又一深层原因. 展开更多
关键词 酸雨胁迫 水稻 小麦 油菜 萌发 POD CAT
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铈对酸雨胁迫下大麦种子萌发的影响 被引量:20
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作者 周青 黄晓华 +2 位作者 叶亚新 张一 弋小红 《中国稀土学报》 CAS CSCD 北大核心 2000年第3期262-264,共3页
研究了铈对酸雨胁迫大麦种子萌发的影响。随着酸雨pH值的增加 ,大麦发芽势、发芽率、幼苗地下与地上部干重及叶绿素含量递减 ,根系质膜透性递增 ;酸雨对铈浸种的大麦种子胁迫作用减轻 ,表明铈有缓解酸雨胁迫种子萌发的作用。
关键词 大麦 种子萌发 酸雨 胁迫效应 作物监测
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酸雨胁迫对木荷叶片气体交换和叶绿素荧光参数的影响 被引量:26
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作者 殷秀敏 伊力塔 +2 位作者 余树全 江洪 刘美华 《生态环境学报》 CSCD 北大核心 2010年第7期1556-1562,共7页
通过盆栽试验,研究了3种不同pH值(2.5、4.0、5.6)的模拟酸雨溶液对2年生木荷(Schima superba)幼苗叶片气体交换和荧光参数的影响。结果表明:在不同酸雨处理下,净光合速率和气孔导度日变化均呈"双峰"型,最大净光合速率和最高... 通过盆栽试验,研究了3种不同pH值(2.5、4.0、5.6)的模拟酸雨溶液对2年生木荷(Schima superba)幼苗叶片气体交换和荧光参数的影响。结果表明:在不同酸雨处理下,净光合速率和气孔导度日变化均呈"双峰"型,最大净光合速率和最高表观量子效率(AQE)变化趋势依次是pH4.0>pH5.6>pH2.5,说明pH4.0处理对木荷光合作用有促进作用;在不同酸雨处理下,PSⅡ原初光能转换效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)和相对叶绿素含量均呈现出pH4.0>pH5.6>pH2.5的变化趋势,pH4.0酸雨处理下表现出最高值,说明适度降低酸雨pH值(pH4.0)并不会对木荷的光合系统活性造成损伤,反而有促进作用,表明木荷对酸雨有较强的适应能力。 展开更多
关键词 木荷 酸雨胁迫 光合特性 气体交换 叶绿素荧光参数
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外源抗坏血酸对酸雨胁迫油菜幼苗的缓解效应 被引量:8
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作者 周琴 张佩 +3 位作者 曹春信 张国正 江海东 濮梅娟 《农业环境科学学报》 CAS CSCD 北大核心 2010年第8期1437-1442,共6页
为探讨抗坏血酸(AsA)对酸雨胁迫油菜毒害效应的缓解效果,以苏油1号为供试材料,采用盆栽土培的方法研究了不同浓度的外源AsA处理对pH2.5酸雨胁迫下油菜幼苗生长的影响。结果表明,pH2.5酸雨显著抑制了油菜幼苗的生长,喷施外源AsA后,一定... 为探讨抗坏血酸(AsA)对酸雨胁迫油菜毒害效应的缓解效果,以苏油1号为供试材料,采用盆栽土培的方法研究了不同浓度的外源AsA处理对pH2.5酸雨胁迫下油菜幼苗生长的影响。结果表明,pH2.5酸雨显著抑制了油菜幼苗的生长,喷施外源AsA后,一定浓度范围的AsA可明显缓解油菜的酸雨胁迫,生物量、叶片色素含量、抗氧化酶活性等显著高于酸雨胁迫的油菜,丙二醛(MDA)含量和相对电导率显著低于酸雨处理油菜。但随着AsA喷施浓度的增加,缓解效应下降,生物量、叶绿素含量等下降,而MDA和电导率上升。可见适宜浓度的外源AsA对酸雨胁迫下的油菜幼苗具有一定的缓解效应,但浓度过高则产生促氧化作用,在试验中以4.0 mmol.L-1的效果最佳。 展开更多
关键词 油菜幼苗 抗坏血酸 缓解 酸雨 胁迫
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酸雨胁迫下镧对冬小麦种子萌发的影响 被引量:14
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作者 高利利 张晨 +1 位作者 邱琳 周青 《麦类作物学报》 CAS CSCD 北大核心 2008年第1期129-133,共5页
为了探索酸雨胁迫下稀土元素镧对冬小麦种子萌发的影响,采用pH值分别为2.0、2.5、3.0、3.5、4.0、4.5、5.0的模拟酸雨条件和稀土元素镧(10mg/L)处理培养皿中的冬小麦(Triticum aestlvum L.)种子,置于常温状态下萌发,测... 为了探索酸雨胁迫下稀土元素镧对冬小麦种子萌发的影响,采用pH值分别为2.0、2.5、3.0、3.5、4.0、4.5、5.0的模拟酸雨条件和稀土元素镧(10mg/L)处理培养皿中的冬小麦(Triticum aestlvum L.)种子,置于常温状态下萌发,测定不同酸雨胁迫强度下镧对种子发芽率、发芽势、发芽指数、活力指数、过氧化物酶(POD)活性及丙二醛(MDA)含量的影响。结果表明,高强度酸雨(PH2.0)胁迫下,经镧处理及未经处理的冬小麦种子的发芽率、发芽势、发芽指数、活力指数都为0,POD活性较对照显著降低,MDA含量达到最高。随着酸雨胁迫强度逐渐减弱(pH≥2.5),POD活性逐渐升高,MDA含量逐渐降低,说明经镧处理后,酸雨胁迫强度过高时(pH2.0),冬小麦种子萌发完全受到抑制,镧对种子的防护作用没有明显表现出来;在pH为2.5~5.0的酸雨强度下,镧对种子的萌发具有一定的防护效应,减轻了酸雨对萌发期间种子的伤害程度,增强了种子抗酸雨的能力。 展开更多
关键词 冬小麦 酸雨胁迫 萌发 POD
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UV-B辐射与酸雨复合胁迫对油菜幼苗生长的影响 被引量:23
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作者 梁婵娟 周青 +3 位作者 沈东兴 曾庆玲 张光生 黄晓华 《农业环境科学学报》 CAS CSCD 北大核心 2004年第2期231-234,共4页
采用水培实验方法研究了紫外辐射(UV-B,280~320nm)与酸雨(AR)单一和复合胁迫对油菜幼苗生长的影响。实验表明,单一胁迫与复合胁迫对油菜幼苗生长有不同程度的抑制作用。在单一紫外辐射胁迫下(T1,T2),地上部分的降幅为11.8%~44.8%、21... 采用水培实验方法研究了紫外辐射(UV-B,280~320nm)与酸雨(AR)单一和复合胁迫对油菜幼苗生长的影响。实验表明,单一胁迫与复合胁迫对油菜幼苗生长有不同程度的抑制作用。在单一紫外辐射胁迫下(T1,T2),地上部分的降幅为11.8%~44.8%、21.7%~50.4%,地下部分的降幅为2.7%~34.7%、2.8%~42.8%。单一酸雨胁迫下(AR1,AR2),降幅依次为6.2%~17.7%、3.7%~10.9%,1.6%~23.7%、0.6%~10.9%。复合胁迫下降幅明显低于单一胁迫,地上部分的降幅为24.7%~50.5%(AR1+T1)、18.5%~49.2%(AR2+T1)、32.3%~67.9%(AR1+T2)、24.4%~66.5%(AR2+T2)。地下部分的降幅依次为3.6%~46.2%、3.5%~43.1%、4.0%~52.9%、3.7%~49.7%。 展开更多
关键词 UV-B辐射 酸雨 复合胁迫 油菜 幼苗生长 生态生理学 水培实验
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不同水稻品种种子萌发对酸雨胁迫的响应 被引量:18
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作者 陶丽华 杨国栋 周青 《农业环境科学学报》 CAS CSCD 北大核心 2006年第3期566-569,共4页
采用室内试验方法,研究了pH2.0、2.5、3.0、3.5、4.0、5.0模拟酸雨对徐稻3号、镇稻9424、新品5356等3个品种水稻种子萌发的影响。结果表明,3个品种的发芽(率)势、发芽(活力)指数随胁迫强度增加(pH5.0 ̄3.0),呈先增后减的变化;pH2.5时仅... 采用室内试验方法,研究了pH2.0、2.5、3.0、3.5、4.0、5.0模拟酸雨对徐稻3号、镇稻9424、新品5356等3个品种水稻种子萌发的影响。结果表明,3个品种的发芽(率)势、发芽(活力)指数随胁迫强度增加(pH5.0 ̄3.0),呈先增后减的变化;pH2.5时仅有异状发芽,pH2.0时不发芽。3者的发芽(率)势、发芽(活力)指数等均与胁迫时间(1 ̄7d)呈显著负相关(异状发芽率呈正相关)。综合分析认为,酸雨对3个水稻品种的伤害阈限为pH2.5 ̄pH3.0,胁时为2 ̄4d,3个水稻品种对酸雨抗性存在一定差异,即徐稻3号与镇稻9424的抗酸雨能力略强于新品5356。 展开更多
关键词 酸雨胁迫 抗性 水稻 种子萌发
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镧对酸雨胁迫下高粱种子萌发及POD活性和MDA含量的影响 被引量:19
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作者 邱琳 王娜 周青 《中国生态农业学报》 CAS CSCD 北大核心 2009年第2期343-347,共5页
本文以高粱"熊杂9号"为对象,采用模拟酸雨伤害的常规种子实验方法,研究稀土镧对酸雨胁迫下高粱种子萌发及过氧化物酶(POD)活性和丙二醛(MDA)含量的影响。结果显示,12mg·L01La(Ⅲ)浸种后,可明显缓解酸雨对高粱种子萌发的... 本文以高粱"熊杂9号"为对象,采用模拟酸雨伤害的常规种子实验方法,研究稀土镧对酸雨胁迫下高粱种子萌发及过氧化物酶(POD)活性和丙二醛(MDA)含量的影响。结果显示,12mg·L01La(Ⅲ)浸种后,可明显缓解酸雨对高粱种子萌发的抑制作用,高粱种子发芽率、发芽势、发芽指数和活力指数较未处理组升高,而异状发芽率降低,pH2.5时变化幅度最明显。pH2.0时由于酸雨使种子内部结构严重破坏,La(Ⅲ)的加入已无法缓解酸雨引发的伤害。La(Ⅲ)处理组MDA含量和POD活性均低于未处理组。上述结果表明,La(Ⅲ)可通过调节POD活性减轻酸雨胁迫引发的膜脂过氧化,缓解酸雨对种子萌发的抑制作用。 展开更多
关键词 酸雨胁迫 高粱种子 过氧化物酶 丙二醛 萌发
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酸雨胁迫对毛竹叶片光合速率和叶绿素荧光参数的影响 被引量:11
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作者 王玉魁 郭慧媛 +3 位作者 阎艳霞 张汝民 高岩 温国胜 《生态环境学报》 CSCD 北大核心 2015年第9期1425-1433,共9页
为探讨酸雨胁迫下毛竹(Phyllostachys pubescens)色素含量变化及其对光合速率和叶绿素荧光动力学参数的影响,试验模拟酸雨(SO42-∶NO3-=4∶1摩尔比),设定p H 2.5、4.0、5.6和6.9(CK),对毛竹3年生盆栽实苗进行处理,测定了叶片色素含量、... 为探讨酸雨胁迫下毛竹(Phyllostachys pubescens)色素含量变化及其对光合速率和叶绿素荧光动力学参数的影响,试验模拟酸雨(SO42-∶NO3-=4∶1摩尔比),设定p H 2.5、4.0、5.6和6.9(CK),对毛竹3年生盆栽实苗进行处理,测定了叶片色素含量、净光合速率(Pn)、叶绿素荧光动力学参数并进行分析。结果表明:p H 5.6酸雨处理增加了毛竹叶片中叶绿素a(Chl a)和类胡萝卜素(Car)含量,使得光合速率(Pn)升高;p H 4.0和p H 2.5处理使Chl a、Car、Chl a+b、Chl a/b降低,Pn下降;随着处理时间延长影响效果越明显,75 d时Pn与对照(CK)相比差异极显著。p H 4.0和p H 2.5处理使荧光诱导动力学曲线的IPJ点荧光强度出现不同程度降低,处理75 d时初始荧光(F0)降低11.73%和17.59%,峰值P点荧光(Fp)降低25.46%和31.41%,反应中心密度(RC/CSo)降低22.94%和26.22%,实际量子产额(Yield)下降20.41%和35.31%、光化学淬灭系数(q P)下降15.48%和19.42%,表观光合电子传递速率(ETR)下降22.02%和25.14%,非光化学淬灭系数(q N)上升23.16%和33.46%。p H 5.6处理使荧光强度升高,F0和Fp分别比CK增加30%和18.57%,q P和ETR上升8.38%和13.53%,q N下降17.65%。酸雨胁迫使毛竹叶片天线色素吸收能量(ABS/RC)、捕获能量(TRo/RC)和热耗散能量(DIo/RC)升高;以吸收光能为基础的性能指数(PIABS)、最大光化学效率(φPo)、电子传递量子产额(φEo)、电子传递效率(ψo)和电子传递能量(ETo/RC)降低。轻度酸雨处理促进毛竹叶片光合色素合成并提高Pn,重度酸雨胁迫下光合色素含量降低,Pn下降。荧光诱导动力学曲线OJIP曲线及JIP-test分析可作为快速检测毛竹在酸雨胁迫条件下生理响应机制的方法。 展开更多
关键词 酸雨胁迫 光合速率 叶绿素 荧光参数 毛竹
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酸雨胁迫下乡土植物根际土壤的化学行为 被引量:7
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作者 周光益 田大伦 +3 位作者 杨乐苏 王旭 邱治军 刘敏 《林业科学》 EI CAS CSCD 北大核心 2009年第11期161-166,共6页
A short-term exposure experiment of 19 native plant species was carried out from May 2006 to August 2008 at two sites with different stresses of acid rain pollution(HP:Guangzhou Petrochemical Factory in Huangpu repre... A short-term exposure experiment of 19 native plant species was carried out from May 2006 to August 2008 at two sites with different stresses of acid rain pollution(HP:Guangzhou Petrochemical Factory in Huangpu represents a contaminated area;LXH:Liuxihe National Forest Park represents a relative clean area).Total 76 soil samples,collected from rhizospheres of those tested plants and the nearby bulk soil,were analyzed to investigate chemical behaviors of rhizosphere soil under the different acid rain pollution.Meanwhile,soil samples of rhizosphere of Schima superba and the nearby bulk soil under a longer-term pollution were also collected and analyzed for further confirmation.The results showed:(1)Soil major ions(H+,Al 3+,Cl-,NO3-,SO4 2-,K+,NH4+)contents in the serious acid rain stress area were higher than that in the relative clean area and the serious acid rain stress induced an increase in leaching Ca 2+,however promoted Ca 2+ transfer from bulk soil to rhizosphere soil.(2)The nutrient content of rhizosphere soil was in general higher than that of bulk soil.(3)There were antagonistic actions and negative correlations between Ca 2+(as well as organic matter)and Al 3+ in rhizosphere soil.(4)Acid rain significantly caused Al release,the ratio of exchangeable Al and exchangeable Ca(Al/Ca)of the soil in serious acid rain pollution area was larger than that in the relative clean area.(5)There was a close correlation between Al 3+ and organic acid in the soil,which suggested that the plant roots would excrete more organic acid with the enhancing acid stress for complexing Al 3+ in the root sphere to lessen the toxicity of aluminum. 展开更多
关键词 酸雨胁迫 根际土壤 化学行为
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不同演替阶段典型树种幼苗对酸胁迫响应的高光谱监测 被引量:5
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作者 程苗苗 江洪 +6 位作者 陈健 余树全 宋晓东 王彬 谢小赞 郭徵 江子山 《生态学报》 CAS CSCD 北大核心 2009年第11期5953-5962,共10页
通过在为期2a的可控酸雨试验下对处于不同演替阶段的典型树种幼苗的高光谱测定,得到不同梯度酸雨下各树种的叶片光谱反应曲线及相应叶片的生理生化参量。对测定的3种树种的叶片叶绿素含量及一阶导数光谱进行分析,发现随着酸雨浓度的增加... 通过在为期2a的可控酸雨试验下对处于不同演替阶段的典型树种幼苗的高光谱测定,得到不同梯度酸雨下各树种的叶片光谱反应曲线及相应叶片的生理生化参量。对测定的3种树种的叶片叶绿素含量及一阶导数光谱进行分析,发现随着酸雨浓度的增加,处于演替前期的先锋树种马尾松的幼苗叶绿素含量呈现增加趋势,而处于演替中、后期的木荷和青冈幼苗叶绿素含量则呈现减少趋势;随着试验时间的推移,马尾松的红边位置呈现"红移"趋势,其中pH2.5处理下的"红移"趋势较明显;而木荷和青冈的红边位置则呈现不同程度的"蓝移"趋势。较长时期高浓度酸胁迫对先锋树种马尾松的幼苗生长有一定促进作用,而对演替中期和后期树种木荷和青冈幼苗生长则主要表现为抑制作用。 展开更多
关键词 亚热带树种 演替 酸胁迫 高光谱 红边
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