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叶绿素荧光非光化学猝灭
相关语句
  non-photochemical quenching of chlorophyll fluorescence
     Diurnal and Seasonal Variations of Non-photochemical Quenching of Chlorophyll Fluorescence in Sweet Viburnum Leaves
     珊瑚树叶片叶绿素荧光非光化学猝灭的日变化和季节变化
短句来源
     DETECTING THE FORMATION AND COMPONENTS OF NON- PHOTOCHEMICAL QUENCHING OF CHLOROPHYLL FLUORESCENCE IN DUNALIELLA SALINA 1009
     盐藻叶绿素荧光非光化学猝灭产生的条件和主要组分的检测
短句来源
  non photochemical quenching of chlorophyll fluorescence
     It also decreased the photochemical efficiency (ΔF/Fm′) of PS II under actinic light, electron transport rate (ETR) and ATP content per unit leaf area but increased the intercellular CO 2 concentration and non photochemical quenching of chlorophyll fluorescence (NPQ).
     同时 ,光系统Ⅱ光化学效率(ΔF/Fm′)、电子传递速率 (ETR)和单位叶面积ATP含量均降低 ,而胞间二氧化碳浓度 (Ci)和叶绿素荧光非光化学猝灭 (NPQ)增加。
短句来源
  “叶绿素荧光非光化学猝灭”译为未确定词的双语例句
     In addition, data of middle relaxing component of non-photochemical fluorescence quenching (qm) and time required PSII maximal photochemical efficiency (Fv/Fm) recovery revealed that state transition-dependent and PSII cyclic reparation-dependent energy dissipation were stronger in ABA-treated maize seedlings than control under strong light.
     另外,叶绿素荧光非光化学猝灭的中间组分(qm)增强,光抑制后Fv/Fm的恢复能力提高,这表明ABA处理高提高了强光下玉米幼苗的光系统状态转换能力和PSⅡ循环修复作用。
短句来源
     Diurnal and seasonal changes innon-photochemical quenching of chlorophyll fluorescence in sweet viburnumwere observed with a modulated fluorimeter,in order to explore the regularities of the radiationless energy dissipation under natural conditions. On cleardays, non-photochemical quenching(qE) and its slowly-relaxing component(qE-slow) rose with an increase of sunlight intensity, and reached their maxima at noon, then declined with the decrease of sunlight intensity.
     用脉冲调制荧光仪观测了珊瑚树叶片叶绿素荧光非光化学猝灭(qE)的日变化和季节变化后发现:在晴天,qE及其慢弛豫组分(qE-slow)随着光强的增加而升高,中午达最高值,之后随光强的减弱而下降;
短句来源
     The gradual increase of the SOD, POD and CAT activities, as well as that of the ratio of P r (photo_respiration rate) to P r+P n and non_photochemical quenching of chlorophyll fluorescence (NPQ) indicates that those mechanisms related to the changes of these parameters may play an important role in protecting rice leaves from oxidative damage under high nocturnal temperature stress.
     而SOD、POD和CAT活性升高 ,光呼吸速率 (Pr)与Pr+Pn 的比值、叶绿素荧光非光化学猝灭 (NPQ)逐渐增加对水稻叶片是一种保护作用。
短句来源
  相似匹配句对
     Diurnal and Seasonal Variations of Non-photochemical Quenching of Chlorophyll Fluorescence in Sweet Viburnum Leaves
     珊瑚树叶片叶绿素荧光光化学猝灭的日变化和季节变化
短句来源
     DETECTING THE FORMATION AND COMPONENTS OF NON- PHOTOCHEMICAL QUENCHING OF CHLOROPHYLL FLUORESCENCE IN DUNALIELLA SALINA 1009
     盐藻叶绿素荧光光化学猝灭产生的条件和主要组分的检测
短句来源
     Non photochemical Quenching of Chlorophyll Fluorescence in Soybean and Sweet Viburnum Leaves
     珊瑚树和大豆叶片叶绿素荧光光化学猝灭
短句来源
     In order to observe the responses of non photochemical chlorophyll fluorescence quenching (qN) as well as the change courses and components of qN to drought and shade stresses, these parameters were measured in different treatments.
     为了了解玉米叶绿素光化学荧光猝灭 (q N)对干旱和遮光逆境的反应 ,我们研究了 q N的主要叶绿素荧光参数。
短句来源
     Chlorophyll Fluorescence Quenching Induced by Superoxide Anion
     超氧阴离子诱导的叶绿素荧光猝灭
短句来源
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  non-photochemical quenching of chlorophyll fluorescence
Simultaneously, the non-photochemical quenching of chlorophyll fluorescence increased obviously after water stress for 24 h.
      
Relationship between photosynthesis and non-photochemical quenching of chlorophyll fluorescence in two red algae with different
      
Non-photochemical quenching of chlorophyll fluorescence increased slightly in barley and increased to high values below 20 ° C in maize.
      
At the same time, non-photochemical quenching of chlorophyll fluorescence had increased and did not return to control values during the first week of recovery.
      
Increased control of photosystem II activity in the SO2-inhibited state was also indicated by increased light scattering and by increased non-photochemical quenching of chlorophyll fluorescence.
      
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Diurnal and seasonal changes innon-photochemical quenching of chlorophyll fluorescence in sweet viburnumwere observed with a modulated fluorimeter,in order to explore the regularities of the radiationless energy dissipation under natural conditions. On cleardays, non-photochemical quenching(qE) and its slowly-relaxing component(qE-slow) rose with an increase of sunlight intensity, and reached their maxima at noon, then declined with the decrease of sunlight intensity. On cloudydays, however, the changes of qE...

Diurnal and seasonal changes innon-photochemical quenching of chlorophyll fluorescence in sweet viburnumwere observed with a modulated fluorimeter,in order to explore the regularities of the radiationless energy dissipation under natural conditions. On cleardays, non-photochemical quenching(qE) and its slowly-relaxing component(qE-slow) rose with an increase of sunlight intensity, and reached their maxima at noon, then declined with the decrease of sunlight intensity. On cloudydays, however, the changes of qE andqE slow were not significant. The qE andqE-slow measured in winter were higherthan those measured in spring and autumn. The qE and qE-solw measured atboth high and low temperatures werehigher than those measured at optimumtemperature. These results indicate thatthe predominant factors causing the diurnal and seasonal changes in non-photochemical quenching of chlorophyllfluorescence in sweet viburnum aresunlight intensity and air temperature,respectively.

用脉冲调制荧光仪观测了珊瑚树叶片叶绿素荧光非光化学猝灭(qE)的日变化和季节变化后发现:在晴天,qE及其慢弛豫组分(qE-slow)随着光强的增加而升高,中午达最高值,之后随光强的减弱而下降;阴天时,这两个指标的日变化不明显。在不同季节,相同日时间和同一光照强度下测定珊瑚树叶片的qE和qE-slow,两个指标在冬季明显高于春、秋两季;在短时间(1d)内改变强光下的叶片周围的温度,叶片的qE和qE-slow在高温和低温下均高于过温下测定的结果。

Diurnal variations in values of the three components, the fast phase (qN f), the middle phase (qN m ), and the slow phase (qN s), of non photochemical quenching of chlorophyll fluorescence and light absorbance at 505 nm in soybean and sweet viburnum leaves were observed by using a portable PAM 2000 fluorometer and a spectrophotometer (754 Model). The results are as follows: (1) qN f and qN s increased gradually in leaves of both species as sunlight intensity rose in the morning. At midday qN s was much...

Diurnal variations in values of the three components, the fast phase (qN f), the middle phase (qN m ), and the slow phase (qN s), of non photochemical quenching of chlorophyll fluorescence and light absorbance at 505 nm in soybean and sweet viburnum leaves were observed by using a portable PAM 2000 fluorometer and a spectrophotometer (754 Model). The results are as follows: (1) qN f and qN s increased gradually in leaves of both species as sunlight intensity rose in the morning. At midday qN s was much higher than qN f in sweet viburnum leaf, while in soybean leaf the two parameters were at almost the same level. Among the three components of non photochemical quenching of chlorophyll fluorescence in leaves of the two species, qN m was always at a very low level in the whole day except in the early morning and late afternoon, although it also changed with light intensity (Figs.1, 2). (2) At midday the level of the original fluorescence (Fo) reached its minimum and maximum of the diurnal course for sweet viburnum and soybean leaves, respectively (Figs.1, 2). (3) Light absorbance change at 505 nm caused by illumination with a saturating light (1 300 μmol photons m -2 s -1 ) for 75 minutes was much stronger in sweet viburnum leaf than in soybean leaf (Fig.3). (4) In sweet viburnum leaf the diurnal variation pattern of light absorbance at 505 nm, expressed as A 505 / A 652 , was similar to those of both qN s and photon flux density of sunlight with a peak value at midday (Fig.4). (5) qN s was more severely inhibited by DTT(dithiothreitol), an inhibitor of the xanthophyll cycle, in sweet viburnum leaf (57%) than in soybean leaf (23%) (Fig.5). Based on the above results it is concluded that in comparison with the thermal dissipation processes related to the xanthophyll cycle, inactivation of PSⅡ reaction center, and the proton gradient across thylakoid membrane, state transition is not likely an important mechanism in protecting the photosynthetic apparatus against photodamage under natural conditions. The xanthophyll cycle dependent thermal dissipation process is the predominant protective mechanism in sweet viburnum leaf but not in soybean leaf. The slow component of non photochemical quenching of chlorophyll fluorescence (qN s) is closely linked to the xanthophyll cycle in sweet viburnum leaves.

用PAM2000 型荧光仪和754 型分光光度计观测了珊瑚树和大豆叶片叶绿素荧光的非光化学猝灭快、中和慢3 个组分(qNf,qNm 与qNs) 和505 nm 光吸收的日变化。主要结果如下:(1) 中午,珊瑚树叶片的qNs 比qNf 大得多,而大豆叶片的这两个参数却几乎处于同一水平。它们的qNm 虽然也随光强变化,但与qNs 和qNf 相比,除早晨和傍晚以外全天的水平都是最低的。(2) 珊瑚树叶片的初始荧光水平(Fo) 中午最低,而大豆叶片的Fo 中午最高。(3) 饱和光照射引起的珊瑚树叶片505 nm 光吸收的增加比大豆叶片大得多。(4) 珊瑚树叶片505 nm 光吸收的日变化方式与qNs 的相类似。(5) 叶黄素循环的抑制剂DTT对珊瑚树叶片qNs 的抑制(57 % ) 比对大豆叶片qNs 的抑制(23 % ) 严重。

The net photosynthetic rate (P n), the apparent quantum yield (AQY), the photochemical efficiency of PSⅡ(F v/F m), the quantum yield of PSⅡ electron transport (Ф PSⅡ ) and the coefficient of photochemical quenching (q p) were decreased in rice (Oryza sativa L.) leaves under high nocturnal temperature (42±1) ℃ stress, but the relative reduction state of PSⅡ (1-q p) was increased. With the increment of stress time, the chlorophyll content and the binding degree of chlorophyll_protein complex declined...

The net photosynthetic rate (P n), the apparent quantum yield (AQY), the photochemical efficiency of PSⅡ(F v/F m), the quantum yield of PSⅡ electron transport (Ф PSⅡ ) and the coefficient of photochemical quenching (q p) were decreased in rice (Oryza sativa L.) leaves under high nocturnal temperature (42±1) ℃ stress, but the relative reduction state of PSⅡ (1-q p) was increased. With the increment of stress time, the chlorophyll content and the binding degree of chlorophyll_protein complex declined gradually, the O -· 2(superoxide radical) production rate and H 2O 2 content in leaves elevated. The activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) increased for 2-3 days under high temperature stress yet decreased afterwards. The results showed that the photosynthetic efficiency declined in rice leaves under high nocturnal temperature stress with concurrent emergence of the symptom of oxidative damage. The gradual increase of the SOD, POD and CAT activities, as well as that of the ratio of P r (photo_respiration rate) to P r+P n and non_photochemical quenching of chlorophyll fluorescence (NPQ) indicates that those mechanisms related to the changes of these parameters may play an important role in protecting rice leaves from oxidative damage under high nocturnal temperature stress.

夜间高温 (42± 1)℃胁迫后水稻 (OryzasativaL .)叶片的净光合速率 (Pn)下降 ,表观量子效率 (AQY)、PSⅡ原初光能转化效率 (Fv/Fm)、PSⅡ线性电子传递的量子效率 (ФPSⅡ)、光化学猝灭系数 (qp)下降 ,PSⅡ的相对还原状态 (1-qp)升高。随着夜间高温胁迫时间的延长 ,叶绿素_蛋白复合体的结合度和叶绿素含量逐渐降低 ,叶片中O-·2的生成速率和H2 O2 的含量增加 ;清除活性氧的酶类超氧物歧化酶 (SOD)、过氧化物酶 (POD)和过氧化氢酶 (CAT)在2 - 3d内的夜间高温胁迫下活性升高 ,随着胁迫时间的增加则活性下降。结果表明 :夜间高温胁迫引起水稻叶片光合效率下降 ,出现氧化伤害症状 ;而SOD、POD和CAT活性升高 ,光呼吸速率 (Pr)与Pr+Pn 的比值、叶绿素荧光非光化学猝灭 (NPQ)逐渐增加对水稻叶片是一种保护作用。

 
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