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游离态多胺
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  free polyamines
     The contents of MDA,H2O2 were obviously enhanced,but at the same time the contents of soluble sugar,amino acid,free polyamines and heat-stable protein were all dramatically increased.
     低氧胁迫下幼苗MDA、H2O2含量显著增加,但是幼苗体内可溶性糖、氨基酸、游离态多胺和热稳定蛋白含量也显著提高。
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     Compared with the control, the growth and yield of grafted muskmelon under treatment showed significant difference. The free polyamines were dominant forms among 3 polyamines, accounted about 2/3 to total polyamines. All the 3 polyamines were decreased in roots and leaves after 35 d under NaCl 150 mmol/L stress.
     150mmol/L的NaCl胁迫35d嫁接伽师甜瓜植株叶片和根系中的3种形态多胺都有不同程度的下降,其中游离态多胺下降幅度最大;
短句来源
     PAO activity in roots was increased at first and then decreased under NaCl stress, while in leaves the activities changed in opposite direction, which suggests that PAO might regulate the free polyamines content, therefore, the contents of the soluble and insoluble conjugated polyamines were affected.
     游离态多胺中,亚精胺和精胺(Spd+Spm)的含量变化与相应部位PAO的活性变化趋势相反,表明PAO在盐胁迫下可能调节了游离态多胺的含量从而影响高氯酸可溶结合态与高氯酸不溶结合态多胺的含量。
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  free polyamine
     Both conjugated Put/PAs and conjugated (Spd+Spm)/Put values had a similar changing trend to free polyamine.
     结合态多胺的Put/PAs值和(Spd+Spm)/Put值变化趋势与游离态多胺一致;
短句来源
     In the tomato fruit stored at 1 C, free polyamine (f-PAs) level increased, conjugated polyamine (c-PAs) level stablized, and bound polyamine (b~PAs) increased in 1 month then decreased.
     4.热处理抑制果实内源游离态多胺(f-PAs)的累积,成倍增加结合态多胺(c-PAs)水平,对束缚态多胺(b-PAs)总量无影响,显著增加内源亚精胺(Spd)和精胺(Spm)的总量。
短句来源
     Compared with NaCl treated plants, P5CS activity was increased remarkably by ABA+ NaCl, however, no significant change in ProDH activity was observed (Fig.2). Furthermore, ODC activity was increased very significantly, PAO and TGase activities were also rose apparently (Fig.4), leading to sinificant increases in Pro and free polyamine contents (Fig.3, Table 1). Besides these changes, the (Spd+PAx)/Put and the total conjugated polyamine levels rose remarkably.
     与NaCl处理相比 ,ABA +NaCl处理后碱蓬植株P5CS活性显著上升 ,ProDH活性变化不明显 ,ODC活性极显著上升 ,PAO和转谷酰胺酶 (TGase)活性上升 ,从而使Pro和游离多胺含量均显著上升 ,游离态多胺 (Spd +PAx) /Put提高 ,结合态多胺总量上升。
短句来源
     PAO activities in roots was increased at first and then decreased under NaCl stress, while in leaves the activities changed in opposite direction (Fig.4). It has been noted that the sum of free Spd and Spm (Spd+Spm) content is reversely correlated with PAO activity changes (Fig.2), which suggests that PAO might regulate the free polyamine content, therefore, the contents of the soluble and insoluble conjugated polyamines were affected.
     游离态多胺中,亚精胺和精胺(Spd+Spm)的含量变化与相应部位PAO的活性变化趋势相反,表明PAO在盐胁迫下可能调节了游离态多胺的含量从而影响高氯酸可溶结合态与高氯酸不溶结合态多胺的含量。
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  “游离态多胺”译为未确定词的双语例句
     The Study of Relationship Between Free PAs and Resistance of Tobacco to TMV
     烟草叶片游离态多胺与抗TMV关系探讨
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     3. The polyamine contents of some fruits and traditional Chinese medicine is determined.
     3.对水果和某些植物药材中的多胺含量进行了测定,结果显示,所测水果多胺含量中,游离态多胺比例很大(>70%)。
短句来源
     And hot water treatment might delay chilling injury and decay of tomato fruit through a mechanism that involved Spd, Spm and conjugated polyamine levels.
     以上结果推测热处理通过增加番茄SPd和sPm含量,促进游离态多胺向结合态多胺转变,和提高杭氧化酶的活性,来保持细胞膜的稳定,减轻番茄冷害.
短句来源
     However, the mechanism is still not well established in the relationships between polyamine forms (free, PCA soluble and PCA insoluble) and salt tolerance, moreover, whether polyamine participate the stress signaling remains unclear.
     植物体内的多胺分为游离态多胺、高氯酸(PCA)可溶和PCA不溶性结合态多胺,在盐胁迫下这三种状态的多胺及其在信号转导中的作用与抗盐性的关系还不清楚。
短句来源
     The ratio of (free-Spd+free-Spm)/free-Put in 'Lubachun No.
     表明黄瓜幼苗中较高的游离态Spd、游离态Spm含量和较低的游离态Put含量,以及游离态多胺向结合态、束缚态多胺的转化可能有利于增强幼苗的低氧逆境适应能力。
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  free polyamines
Accumulation and ethylene-dependent translocation of free polyamines was studied in various organs, the phloem and xylem exudates of common ice plants (Mesembryanthemum crystallinum L.).
      
We studied the effects of chloride salinity (300 and 500 mM NaCl) on the content of free polyamines (PAs) from putrescine (Put) family in Mesembryanthemum crystallinum L.
      
A dynamics of stress-dependent accumulation of Na+ and Cl- ions, proline, and free polyamines and also activities of antioxidant enzymes, superoxide oxidase (SOD) and free, ion-bound, and covalently bound guaiacol-dependent peroxidases was studied.
      
Free polyamines (putrescine>amp;gt;spermidine) increased during the first 24 h of yeast growth, with a second peak at 42 h, and also during the first 12 h of mycelium-to-yeast transition (spermidine>amp;gt;putrescine).
      
The increase in free polyamines corresponds to bud emergence in yeast growth and to the mycelium-to-yeast transition ofP.
      
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  free polyamine
Changes in free polyamine titers and expression of polyamine biosynthetic genes during growth of peach in vitro callus
      
Spermidine was always the main bound polyamine, and putrescine, the main free polyamine.
      
Actively growing roots had putrescine conjugates as their major polyamines, and spermidine was the most abundant free polyamine.
      
OGs did not alter free polyamine concentrations, but caused a moderate increase of conjugated ones, and exhibited an early inhibitory effect on polyamine biosynthetic gene expression.
      
Changes in free polyamine level and di- and polyamine oxidase activity in cucumber roots under allelochemical stress conditions
      
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Effects of ABA 50 μmol/L and NaCl 400 mmol/L on the content and metabolism of polyamines and Pro in the seedlings of Suaeda glauca Bunge were investigated. The results showed that ABA treatment induced increases in activity of P5CS (Fig.2), ODC and PAO activity (Fig.4), Pro and free polyamine contents increased (Fig.3, Table 1). Moreover, accumulation of Pro and polyamine was more significant under the treatment of NaCl + ABA (Fig.3, Table 1). Compared with NaCl treated plants, P5CS activity was increased...

Effects of ABA 50 μmol/L and NaCl 400 mmol/L on the content and metabolism of polyamines and Pro in the seedlings of Suaeda glauca Bunge were investigated. The results showed that ABA treatment induced increases in activity of P5CS (Fig.2), ODC and PAO activity (Fig.4), Pro and free polyamine contents increased (Fig.3, Table 1). Moreover, accumulation of Pro and polyamine was more significant under the treatment of NaCl + ABA (Fig.3, Table 1). Compared with NaCl treated plants, P5CS activity was increased remarkably by ABA+ NaCl, however, no significant change in ProDH activity was observed (Fig.2). Furthermore, ODC activity was increased very significantly, PAO and TGase activities were also rose apparently (Fig.4), leading to sinificant increases in Pro and free polyamine contents (Fig.3, Table 1). Besides these changes, the (Spd+PAx)/Put and the total conjugated polyamine levels rose remarkably. The promoting effects of ABA + NaCl on Pro and polyamine biosynthesis in Suaeda glauca were consistent with the stimulating effects on the plant growth rate.

比较了 5 0 μmol/L的ABA和 4 0 0mmol/L的NaCl对碱蓬植株内脯氨酸 (Pro)和多胺 (PAs)含量和代谢关键酶活性的影响。结果表明 :ABA处理能诱导碱蓬植株吡咯啉 5 羧酸合成酶 (P5CS)、鸟氨酸脱羧酶(ODC)、多胺氧化酶 (PAO)和脯氨酸脱氢酶 (ProDH)活性上升 ,Pro和游离多胺含量增加。ABA +NaCl处理促进碱蓬植株体内Pro和PA的积累。与NaCl处理相比 ,ABA +NaCl处理后碱蓬植株P5CS活性显著上升 ,ProDH活性变化不明显 ,ODC活性极显著上升 ,PAO和转谷酰胺酶 (TGase)活性上升 ,从而使Pro和游离多胺含量均显著上升 ,游离态多胺 (Spd +PAx) /Put提高 ,结合态多胺总量上升。ABA +NaCl处理对碱蓬植株体内Pro和PAs合成的促进与其对生长速率的促进效应相一致

Plant growth rate (GR), contents of free polyamines (fPAs) and bound polyamines (bPAs) and activities of some key enzymes involved in polyamine (PA) metabolism in the roots of two barley ( Hordeum vulgare L.) cultivars differing in salt sensitivity were investigated with 0-300 mmol/L NaCl treatments. With 0-200 mmol/L NaCl treatments, activities of arginine decarboxylase (ADC) and transglutaminase (TGase) and PA oxidase (PAO) in the roots of barley seedlings all increased, while TGase and PAO activities decreased...

Plant growth rate (GR), contents of free polyamines (fPAs) and bound polyamines (bPAs) and activities of some key enzymes involved in polyamine (PA) metabolism in the roots of two barley ( Hordeum vulgare L.) cultivars differing in salt sensitivity were investigated with 0-300 mmol/L NaCl treatments. With 0-200 mmol/L NaCl treatments, activities of arginine decarboxylase (ADC) and transglutaminase (TGase) and PA oxidase (PAO) in the roots of barley seedlings all increased, while TGase and PAO activities decreased slightly at 300 mmol/L NaCl. As a result, free Put (fPut) content increased continuously with increasing concentrations of NaCl, while levels of free Spd (fSpd) and an unknown PA (fPAx) and bPAs (bPut, bSpd and bPAx), as well as (fSpd+fPAx)/fPut ratio rose at 50-200 mmol/L NaCl and reduced at 300 mmol/L NaCl. However, no significant change in the tetra_amine spermine (Spm) content was observed. Statistical analysis showed that GR was very significantly positively correlated with (fSpd+fPAx)/fPut ratios and the contents of bPAs, whereas a significant inverse correlation existed between GR and the ratios of fPA contents to bPA levels. These results showed that, under salt stress, the balance between fSpd, fPAx and fPut levels and an equipoise between fPA and bPA contents in roots were important to salt tolerance of barley seedlings.

研究了 0~ 30 0mmol/LNaCl对大麦 (HordeumvulgareL .)幼苗生长速率、根系游离和结合态多胺含量以及多胺生物合成关键酶活性的影响。结果表明 ,在 0~ 2 0 0mmol/LNaCl处理下精氨酸脱羧酶 (ADC)、多胺氧化酶 (PAO)以及转谷酰胺酶 (TGase)活性明显提高 ,而在 30 0mmol/LNaCl处理下活性下降。与之对应 ,游离腐胺 (Put)含量随处理盐浓度的提高一直呈上升趋势 ,亚精胺 (Spd)和在根系内检测到的未知多胺 (PAx)在低浓度盐处理时含量上升 ,随盐浓度的提高含量下降。盐处理前后精胺 (Spm)含量变化不明显。低浓度盐处理时游离态 (Spd +PAx) /Put上升 ,随盐浓度的提高比值明显下降。结合态Put、Spd和PAx含量以及结合态多胺总量均在低浓度盐处理时上升 ,随盐浓度的提高含量明显下降。统计分析显示 ,大麦相对生长速率与游离态 (Spd +PAx) /Put和结合态多胺含量间均呈极显著正相关关系 ,与游离态多胺和结合态多胺的比值间均呈显著负相关关系 ,上述结果说明盐胁迫下大麦体内游离态Spd、PAx与Put以及结合态形...

研究了 0~ 30 0mmol/LNaCl对大麦 (HordeumvulgareL .)幼苗生长速率、根系游离和结合态多胺含量以及多胺生物合成关键酶活性的影响。结果表明 ,在 0~ 2 0 0mmol/LNaCl处理下精氨酸脱羧酶 (ADC)、多胺氧化酶 (PAO)以及转谷酰胺酶 (TGase)活性明显提高 ,而在 30 0mmol/LNaCl处理下活性下降。与之对应 ,游离腐胺 (Put)含量随处理盐浓度的提高一直呈上升趋势 ,亚精胺 (Spd)和在根系内检测到的未知多胺 (PAx)在低浓度盐处理时含量上升 ,随盐浓度的提高含量下降。盐处理前后精胺 (Spm)含量变化不明显。低浓度盐处理时游离态 (Spd +PAx) /Put上升 ,随盐浓度的提高比值明显下降。结合态Put、Spd和PAx含量以及结合态多胺总量均在低浓度盐处理时上升 ,随盐浓度的提高含量明显下降。统计分析显示 ,大麦相对生长速率与游离态 (Spd +PAx) /Put和结合态多胺含量间均呈极显著正相关关系 ,与游离态多胺和结合态多胺的比值间均呈显著负相关关系 ,上述结果说明盐胁迫下大麦体内游离态Spd、PAx与Put以及结合态形式之间的平衡与大麦耐盐性关系密切 ,游离态Put向Spd、PAx以及结合态形式转化均有利于大麦耐盐性的提高。

The three polyamines (Put, Spd and Spm) and their different forms (free, perchioric acid soluble and insoluble conjugated) together with polyamine oxidase (PAO) activities were measured in barley (Hordeum vulgare L. KP7) seedlings under salt stress. The results showed that the free polyamines were dominant forms among three polyamines, account about 2/3 total polyamines (Fig.l). All three polyamines decreased in roots and leaves after 8 d under NaCl 200 mmol/L stress. The free polyamine content decreased dramatically...

The three polyamines (Put, Spd and Spm) and their different forms (free, perchioric acid soluble and insoluble conjugated) together with polyamine oxidase (PAO) activities were measured in barley (Hordeum vulgare L. KP7) seedlings under salt stress. The results showed that the free polyamines were dominant forms among three polyamines, account about 2/3 total polyamines (Fig.l). All three polyamines decreased in roots and leaves after 8 d under NaCl 200 mmol/L stress. The free polyamine content decreased dramatically as well as soluble conjugated polyamine content, while the insoluble ones changed little. Different concentration salt stress increased markedly the ratios of (Spd+Spm)/Put and decreased significantly the total polyamine content in roots and leaves (Table 1). PAO activities in roots was increased at first and then decreased under NaCl stress, while in leaves the activities changed in opposite direction (Fig.4). It has been noted that the sum of free Spd and Spm (Spd+Spm) content is reversely correlated with PAO activity changes (Fig.2), which suggests that PAO might regulate the free polyamine content, therefore, the contents of the soluble and insoluble conjugated polyamines were affected.

200 mmol/L的NaCl胁迫8d大麦幼苗叶片和根系中的三种形态多胺都有不同程度地下降,其中游离态多胺含量的下降幅度最大;高氯酸不溶性结合态多胺含量变化较小。根系中PAO的活性先上升后下降,而叶片中PAO的活性先下降后上升。游离态多胺中,亚精胺和精胺(Spd+Spm)的含量变化与相应部位PAO的活性变化趋势相反,表明PAO在盐胁迫下可能调节了游离态多胺的含量从而影响高氯酸可溶结合态与高氯酸不溶结合态多胺的含量。

 
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