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   重度干旱 的翻译结果: 查询用时:0.222秒
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重度干旱
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  heavy drought
     The results showed that after treated with light drought,heavy drought and waterlogging for 40 days,the MDA content in corktree seedlings was significantly higher,being 2.49,2.37 and 4.12 times of the control,respectively,but after treated for 80 days,there was no significant difference among the three treatments.
     结果表明,处理40d以后,轻度干旱、重度干旱和水涝处理的叶片MDA含量始终显著高于对照,最高分别达对照的2.49、2.37和4.12倍,三者之间在处理80d以后MDA含量差异不显著.
短句来源
     In addition, The drought indices were classified according to the levels of cotton suffering from drought, namely when the soil water contents were 10% ̄15%, 10% and over 15% less than the suitable soil moisture in each growing stage of cotton, which were separately called as moderate, light and heavy drought.
     干旱指标以棉花受旱程度分等,当各生育阶段土壤水分比适宜土壤水分下限值低10%~15%时为中等干旱,小于10%时为轻度干旱,大于15%时为重度干旱
短句来源
     3.In drought experiment, C. roseus endogenous glutathione accumulates rapidly, but stomatal closure for long time and limits CO_2 assimilation and the excitation energy of photocativated chlorophy can not fix CO_2, and chloroplast ultrastructure destroyed, the plant agonal, the content of GSH descendes with the extend of treatment during heavy drought.
     3、在干旱实验中发现,重度干旱(RWC<25%)时,长春花内源GSH起始时迅速积累但随作用时间的延长,气孔长时间处于关闭状态,阻止CO_2吸入,光转化成的活跃化学能不能用于CO_2的固定,造成叶绿体超微结构的破坏,植物濒临死亡,GSH随作用时间延长迅速下降。
短句来源
     The free proline content had no obvious variation under waterlogging and in the control,but increased after 40 days of light and heavy drought while declined after 80 days of drought stresses,with the increment being higher under heavy drought than under light drought.
     水涝处理和对照的游离脯氨酸含量在处理期间没有明显变化,干旱处理的游离脯氨酸含量从处理后40d开始增加、80d后回落,重度干旱处理的增加幅度显著大于轻度干旱处理.
短句来源
     No regularity was found for the dynamic variations of SOD,POD and CAT activities,but they were significantly higher under heavy drought than under light drought,waterlogging,and the control.
     SOD、POD和CAT活性的变化趋势缺乏一致性,但重度干旱处理的黄檗幼苗,叶片的SOD、POD和CAT活性在处理期间始终显著高于轻度干旱、水涝处理和对照.
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  “重度干旱”译为未确定词的双语例句
     Spraying exogenous 80 mg/L GA3 solution can increase endogenous GA1/3 and GA1/3/ABA of sea-buckthorn with ABA content declining under serious water deficit, so sprout date and growth was promoted effectively.
     喷施80mg/L外源GA3溶液可有效提高重度干旱下苗木内源GA1/3,降低ABA含量,使GA1/3/ABA提高,促进苗木提早萌芽及萌芽后生长;
短句来源
     The growth of four tree species seedlings had been inhibited significantly under severe drought (40%-45% θ_f)).
     重度干旱(40% ~45% θf)对幼苗生长均有明显抑制作用。
短句来源
     In severe drought conditions, the activity of POD was higher than those of SOD and of CAT.
     重度干旱胁迫下POD活性高于SOD、CAT活性。
短句来源
     Under slight- and mid drought stress, foliar-spraying GB improved the UWL intensity by 35.27% and 43.95%, respectively, decreased H_2O_2 and MDA contents, increased SOD and POD activities, and promoted the accumulation of GB and Pro.
     SOD和POD活性随胁迫加重而升高,但至重度干旱时下降. 与单独干旱处理相比,叶片喷施甜菜碱显著提高了轻度和中度干旱胁迫叶片的UWL(分别提高35·27%和43·95%)、SOD和POD活性,降低了H2O2和MDA含量;
短句来源
     Observation through electron microscope revealed that plasma membrane and chloroplast membrane were injured seriously as the drought developed. At first, the plasma membrane and chloroplast membrane swelled (ΨL =-0.41MPa), then fractured and then almost disintergrated under serious drought condition (ΨL = -1.83MPa).
     电镜观察发现,干旱加强,质膜、叶绿体膜系统受损加重,起初(ψ_L=-0.41MPa)质膜,叶绿体被膜膨散,尔后断裂,重度干旱(ψ_L=-1.83MPa)几乎解体.
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  相似匹配句对
     In severe drought conditions, the activity of POD was higher than those of SOD and of CAT.
     重度干旱胁迫下POD活性高于SOD、CAT活性。
短句来源
     CAT and POD activities. In severe drought conditions,activities of POD were higher than those of SOD and CAT.
     重度干旱胁迫下POD活性高于SOD、CAT的活性。
短句来源
     Arid Climate Observing System
     干旱气候观测系统
短句来源
     Research On Drought Concept
     干旱概念探讨
短句来源
     severe: 3, which cannot be suffered.
     3重度,不能忍受。
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The effect of soil drought in early stage of grain development on the photosynthesis in various parts of wheat plant, cv. Xiannong 68-3, was investigated with a ~(14)CO_2 labeling technique, The results indicated that net photosynthesis of whole shoot was decreased by all the soil drought treatments, but different organs or parts of the plant respond differently. The upper parts were less affected than the lower parts, so the contribution proportion of upper parts to total photosynthesis increased gradually...

The effect of soil drought in early stage of grain development on the photosynthesis in various parts of wheat plant, cv. Xiannong 68-3, was investigated with a ~(14)CO_2 labeling technique, The results indicated that net photosynthesis of whole shoot was decreased by all the soil drought treatments, but different organs or parts of the plant respond differently. The upper parts were less affected than the lower parts, so the contribution proportion of upper parts to total photosynthesis increased gradually with aggravation of drought. One week after resumption of normal water supply, the photosynthetic rate of the middle and upper parts that had been subjected to mild or moderate drought attained or even surpassed that of the control, therefore the crop might compensate for some loss of the yield. The plant that had been subjected to heavy droughtwere not able to recover after being rewatered.

小麦开花后5~16天内给予不同程度的土壤干旱处理。无论轻、中或重度干旱均不同程度地释低了植株的净光合率,但不同器官或部位对干旱的反应不同,上部器官的光合受影响较小,故随着干旱的加重在全株光合中所占比例逐渐增加。恢复灌水后,曾受轻度及中度干旱的植株,中、上部器官的光合有补偿性增强,因而可能减轻产量的损失。

From 1988 to 1990, the ecological and physiological effects on root systems of wheat were studied under different soil water conditions. Results showed that the development of root systems could be inhibited by deficiency and oversupply of soil water. Drought might lead to the reduction of roots in the surface layer and the increase of the ratio of the roots in the deeper layer. When the relative soil water content was below 60%, the number of secondary roots of the individual plant decreased obviously. When...

From 1988 to 1990, the ecological and physiological effects on root systems of wheat were studied under different soil water conditions. Results showed that the development of root systems could be inhibited by deficiency and oversupply of soil water. Drought might lead to the reduction of roots in the surface layer and the increase of the ratio of the roots in the deeper layer. When the relative soil water content was below 60%, the number of secondary roots of the individual plant decreased obviously. When it was below 50%,the root system reduced significantly.Less activity of root systems resulted from the higher severity soil water stress, and the least activity wax found in the flowering period. The wound sap flow of the single plant was in extremely significant positive correlation with the content of soil water. However, there existed an extremely significant negative correlation between the root-top ratio and the soil water content. It was found that the 40% relative soil water content was the lower limit index for severe drought in the later growing stage of wheat.

1988~1990年的研究结果表明,土壤水分不足或过多,均抑制小麦根系的生长。干旱导致土壤表层根量减少,而深层根量所占比例增大。当土壤相对含水量低于60%时,单株次生根数明显减少;低于50%时,单株根量显著下降。根系活性随水分胁迫程度的加强而下降,其中以扬花期的下降幅度为最大。小麦单茎伤流量与土壤含水量呈极显著的正相关,而根冠比与土壤含水量则呈极显著的负相关。此外,研究还指出,40%的土壤相对含水量是小麦生育后期重度干旱的极限指标。

Soil drought during flowering period of maize resulted in decrease of SOD (superoxide dismutase) activities and increase of MDA (malonaldehyde) contents in leaf cells, acid phosphatase activities and soluble phosphotus contents elevated. There was significant negative correlationship between MDA and linolenic acid contents, and also between linoleic acid and linolenic acid contents. Compared with the changes of the index of unsaturated fatty acid, acid phosphatase activities changed in an opposite direction....

Soil drought during flowering period of maize resulted in decrease of SOD (superoxide dismutase) activities and increase of MDA (malonaldehyde) contents in leaf cells, acid phosphatase activities and soluble phosphotus contents elevated. There was significant negative correlationship between MDA and linolenic acid contents, and also between linoleic acid and linolenic acid contents. Compared with the changes of the index of unsaturated fatty acid, acid phosphatase activities changed in an opposite direction. Observation through electron microscope revealed that plasma membrane and chloroplast membrane were injured seriously as the drought developed. At first, the plasma membrane and chloroplast membrane swelled (ΨL =-0.41MPa), then fractured and then almost disintergrated under serious drought condition (ΨL = -1.83MPa). The chloroplast lamellae arranged disorderly as the drought developed, and the stroma lamellae was also sensitive to drought. The fat droplets in cells increased and became larger, indicating that more active oxygen started the lipid peroxidation and phosphatide densterification of membrane. It was inferred that the primary mechanism of membrane injury caused by actvie oxygen might be as follows. Moer active oxygen contents under drought condition started the lipid peroxidation of membrane which resulted in decrease of unsaturated fatty acid, enhanced dissolution of acid phosphatase binded to membrane causing lipid densterification of membrane and accelerating damage of membrane in structure and function.

玉米开花期土壤干旱可使叶细胞中的超氧物歧化酶(SOD)活性降低,丙二醛(MDA)含量增加;酸性磷酸酯酶活性增强,可溶性磷含量增加.随干旱加强,MDA含量增加与亚麻酸含量降低呈极显著负相关,亚油酸含量增加与亚麻酸含量降低呈极显著负相关,酸性磷酸酯酶活性与膜脂脂肪酸不饱和度的变化呈相反的趋势.电镜观察发现,干旱加强,质膜、叶绿体膜系统受损加重,起初(ψ_L=-0.41MPa)质膜,叶绿体被膜膨散,尔后断裂,重度干旱(ψ_L=-1.83MPa)几乎解体.叶绿体片层结构随干旱加强,排列混乱,且间质片层对干旱较敏感.同时,细胞内脂类小滴增多增大.表明干旱下增加的活性氧启动了膜脂过氧化和膜磷脂的脱酯化反应.推测活性氧伤害膜的“原初机制”可能是干旱下活性氧含量增加首先启动了膜脂过氧化,导致膜脂脂肪酸不饱和度降低,对为膜束缚的酸性磷酸酯酶起明显的增溶溶解,进而促进膜磷脂脱酯化反应,加速了膜结构与功能的破坏.

 
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