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【目的】研究不同红蓝光质比LED对红叶石楠试管苗生长和抗氧化酶活性的影响,为高品质红叶石楠试管苗的生产提供理论依据。【方法】以红叶石楠试管苗为材料,采用LED光源的红光R(主波长640nm)和蓝光B(主波长464nm)设计5种不同光质配比(100%R、80%R+20%B、70%R+30%B、60%R+40%B、100%B),以普通荧光灯为对照(CK),探究不同光质比对红叶石楠试管苗形态指标、叶绿素、类胡萝卜素、根系活力、可溶性总糖、蔗糖、可溶性蛋白及抗氧化酶活性的影响。【结果】(1)红叶石楠试管苗株高、地下部鲜质量和干质量、总鲜质量在100%R处理下达到最大值;叶数、叶长、叶幅、地上部干物率、总干物率和类胡萝卜素含量在100%B处理下达到最大值;而根数、地上部鲜质量、地上部干质量和总干质量、地下部干物率、叶绿素a、叶绿素b、叶绿素总含量及根系活力在70%R+30%B处理下达到最大值。(2)各处理试管苗的可溶性糖、蔗糖和可溶性蛋白含量均以70%R+30%B处理最高。(3)叶片POD和SOD活性以70%R+30%B处理最高,CAT活性以100%R处理最高,MDA含量以80%R+20%B处理最高。【结论】红蓝光比为7∶3时有利于提高红叶石楠试管苗叶绿素、可溶性总糖、蔗糖、可溶性蛋白含量和根系活力及抗氧化酶活性,进而有效促进红叶石楠试管苗的生长,可以作为红叶石楠植物离体培养的最佳光质比。 相似文献
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合肥市大气污染对植物叶绿素(a、b)含量比例的影响 总被引：9，自引：2，他引：9
研究了安徽省合肥市城市大气对该市的 5种常见城市绿化植物叶绿素 (a、b)含量比例的影响 ,结果表明 :污染严重的市中心叶绿素a/b值最高 ,无污染的对照区叶绿素a/b值最低 ;通过t测验等数据分析方法 ,测出了石楠、龙柏、海桐具有显著的抗污染能力 ;比较了 5种植物之间抗污染能力的大小 :石楠 >龙柏 >海桐 >紫叶李 >银杏 相似文献
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在闽西山区九龙江流域,以河岸缓冲带植物杂交狼尾草、红花檵木、红叶石楠为研究对象,分析茎、叶中碳、氮、磷的生态化学计量特征,以及植物对碳、氮、磷的累积量,对九龙江缓冲带不同植物碳氮磷化学计量特征进行研究.结果表明,杂交狼尾草、红花檵木、红叶石楠,单位面积地上部分总生物量分别为47.12、4.32、25.85 kg/m2,年际间增加量分别为58.21、2.59、6.02 kg/m2;不同植物及各营养器官C、N、P含量分布,均表现为碳含量>氮含量>磷含量,杂交狼尾草磷含量显著高于其余2种植物(P<0.05);杂交狼尾草叶片的C:N、C:P显著低于红花檵木和红叶石楠(P<0.05),杂交狼尾草对氮磷的利用效率不占优势;杂交狼尾草的碳氮磷累积增长率分别为201.88％、351.53％和569.45％,高于红花檵木与红叶石楠.该研究结果可为九龙江流域的面源污染治理以及河岸植物缓冲带的构建提供理论依据和实践参考. 相似文献
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近年来,红叶石楠在园林绿化及植物造景中发挥着重要的作用。阐述了红叶石楠的特征,介绍了红叶石楠片植、绿篱或幕墙、孤植、盆栽、行道树、绿地景观、点缀、作抗性植物等在园林绿化及造景中的应用方式,并对其前景进行展望,以期为红叶石楠的园林运用提供参考。 相似文献
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以红叶石楠"红罗宾"试管组培苗为材料,以普通荧光灯光源为对照(CK),研究100%R、80%R+20%B、70%R+30%B、50%R+50%B、100%B等5种红(R)、蓝(B)不同比例光质发光二极管(LED)光源对红叶石楠组培苗生长的影响。结果表明,LED光源为全红光(100%R)时红叶石楠组培苗的株高相对较高,为22.0 cm,整株干质量、鲜质量相对较大,分别为201.3、46.6 mg/株;LED光源为80%R+20%B时,红叶石楠组培苗的叶长相对较长,为24.9 mm;光源为70%R+30%B时,红叶石楠组培苗的叶宽、根数、根长、地上部干物率、叶绿素(SPAD值)、根系活力等指标值相对较大,分别为10.7 mm、3.6根、62.9 mm、25.53%、67.0、10.5 mg/(g·h),叶片下表皮气孔面积和开放程度优于其他处理;光源为传统的三基色荧光灯时,红叶石楠组培苗的叶片数相对较多,为13.9张。因此,LED红光、蓝光以70%R+30%B进行处理时有助于红叶石楠组培苗的生长。 相似文献
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研究了在自然低温下温室、荫棚、喷施蒸腾剂、喷防冻剂、地面覆盖等保护措施对5年生红叶石楠优良品种鲁宾斯（Photinia glabra Var.Rubens）越冬的影响。结果表明,在2006年极端温度-10.2℃时,红叶石楠受害等级达到2级可以基本过冬;随着时间的延长,不同栽培措施下红叶石楠的叶绿素含量先减后升,细胞相对质膜透性增大;温室的SOD酶活性先升后降,其他栽培措施红叶石楠的SOD酶活性呈升—降—升的趋势;温室、喷施蒸腾抑制剂的脯氨酸含量呈上升的趋势,而其他栽培措施红叶石楠的脯氨酸含量呈先升后降的趋势。方差分析表明,在越冬过程中,红叶石楠叶片叶绿素含量、细胞膜透性、SOD酶活性、脯氨酸含量不同时间、不同越冬保护措施之间的差异性均是极显著的。越冬保护效果从高到低的排序为温室、荫棚、地面覆盖、喷施防冻剂、喷施蒸腾剂、露地。 相似文献
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[目的]研究不同浓度H2O2处理对2种小麦幼苗叶绿素荧光和叶绿素的影响。[方法]以小麦品种宁春四号和西旱二号幼苗为材料,采用室内水培试验。[结果]对于宁春四号,200μmol／LH2O2处理使得初始荧光（FO）、最大荧光（Fm）、PSI处调节性能量耗散的量子产量Y（NPQ）、光化学淬灭（qP）和非光化学淬灭（NPQ）明显低于对照;不同浓度的H2O2处理使得幼苗叶片叶绿素a（Chla）、叶绿素b（Chlb）和叶绿素总量均显著降低。50、100和200μmol／LH3O2处理下西旱二号幼苗叶片Chla含量和F0显著降低,PSI的最大量子产量（Fv/Fm）、实际光化学反应效率（1,（II））、电子传递速率（ETR）、qP和ⅣPQ均增大,而Chlb和叶绿素总量无显著变化。[结论]与宁春4号相比,外源H2O2胁迫使西旱2号小麦幼苗叶片PSⅡ反应系统更开放,光合机构的损伤较严重。 相似文献
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香樟生理黄化的叶绿素年变化规律研究 总被引：1，自引：0，他引：1
通过对不同等级黄化香樟的研究,结果表明：黄化香樟中叶绿素总量与健康香樟叶绿素总量差异极显著。黄化香樟叶绿素含量老叶平均变化在0．901—1．299mg／g,新叶平均值在0．347—0．688mg／g,分别是健康香樟叶绿素总量的1／10—1／3,黄化程度越高叶绿素总量越低。黄化香樟叶绿素a／b比值偏大,是健康香樟比值的1．5—2．5倍,且随着黄化程度的加剧,叶绿素a／b比值变化幅度变大。因此,叶绿素含量的多少和叶绿素a／b比值的变化幅度大小可以表征香樟黄化的程度。 相似文献
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杂交棉高产生理机制研究 总被引：2，自引：1，他引：2
在相同密度和栽培管理条件下,研究了豫杂35、中棉29和中棉19 3个品种生长中后期主茎叶片光合特性及衰老特点,以期探讨杂交棉高产形成的生理机制。结果表明:杂交棉豫杂35和中棉29与常规棉中棉19相比,打顶后其主茎倒3叶片的叶绿素含量高,随叶片衰老下降的慢;叶片生长前期气孔导度大,生长后期叶片PSⅡ实际光化学效率(ФPSⅡ)大,从而使其叶片光合速率高,且随叶片衰老下降慢,在后期仍表现较强的光合速率。此外,3个品种叶片的光合效率的日变化趋势均呈单峰曲线,总体趋势是杂交棉品种的峰值较中棉19的高且下降的慢;最大光化学效率(Fv/Fm)和ФPSⅡ的日变化均表现为倒抛物线型,但是豫杂35和中棉29的日变化曲线表现在中午前下降的慢,中午谷值浅,中午后恢复上升的快,表现对强光利用能力高。杂交棉所表现的上述高光效特性,为其多结铃,增铃重,获得高产奠定了光合生理基础。 相似文献
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以川赤芍（Paeonia veitchii）为材料,研究了泰安地区夏季在露地栽培条件下不同程度遮光对川赤芍光合作用以及叶绿素荧光特性的影响。结果显示,自然光照下,川赤芍Pn在正午PAR达到最大时出现明显降低,即＂光合午休＂现象;Fv/Fm、Fm也降到日变化的最低值。进行遮光处理的两组川赤芍,Pn均未出现＂午休＂,Fv/Fm、Fm正午时下降幅度不大,日变化曲线相对平稳。尤其遮光30%组,Pn值一天中都保持较高水平,叶绿素总量及叶绿素b相对含量均高于其他两组。而遮光70%条件下,一天中Pn总是处于最低,叶绿素总量反而低于遮光30%条件下的川赤芍,且其叶片薄、黄绿色。综合比较,遮光30%利于川赤芍夏季生长。 相似文献
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[目的]比较分析辽宁省不同特性水稻(Oryza sativa L.)品种灌浆期叶绿素含量及荧光特性,为筛选及选育高光能利用率和耐光抑制的优良水稻品种提供科学依据。[方法]以辽粳9、辽优1106、东壮2号3个辽宁省水稻品种为材料,利用便携式叶绿素仪和调制荧光仪MINI-PAM测定自然条件下灌浆结实期叶绿素含量及荧光参数Ft、Fm'、Yield、ETR、qP的变化情况。[结果]在叶绿素含量上,辽粳9、东壮2号整个灌浆期始终保持较高的水平,但辽优1106灌浆中后期迅速下降。叶绿素荧光参数值总体上辽粳9、东壮2号灌浆各时期变化平缓,且趋于一致,辽粳9均略高于东壮2号;而辽优1106荧光参数中除Fm'和qP与上述2个品种变化趋势相同外,其他参数均表现出灌浆中后期急剧下降。[结论]杂交稻辽优1106和东壮2号中后期的光适应能力较弱,光能利用率急速下降;辽粳9对整个灌浆期的光适应能力及光合利用率最高。 相似文献
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[目的]研究苗期不同抗性大豆荧光参数和叶绿素含量对大豆花叶病毒(SMV)胁迫的响应。[方法]以感SMV品种合丰25和抗SMV品系牡304为材料,以东北地区SMVⅠ号株系为毒源,测定接种SMV后苗期不同抗性大豆荧光参数及叶绿素含量的变化。[结果]与对照相比,SMV胁迫下,除Fo和q N升高外,其他荧光参数均有所降低,抗SMV品种(系)的变化幅度较小。随着胁迫时间的推移,Fm、Fm’、ΦPSII和Fv/Fm逐渐降低,Fo和q N逐渐升高,q P先降低后升高,且抗SMV品系牡304和感SMV品种合丰25分别在6 d和12 d出现最低值。受SMV胁迫后,叶绿素a和叶绿素b含量的变化趋势相同,抗病品种(系)叶绿素含量的上升幅度大于感病品种(系),感病品种(系)叶绿素含量的降低率大于抗病品种(系)。[结论]苗期荧光参数以及叶绿素含量可作为鉴定大豆对SMV抗性的重要依据。 相似文献
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超级稻P88S/0389光合特性初探(英文) 总被引：2，自引：0，他引：2
[Objective] The aim of this study is to understand the high yield often photosynthetic mechanism of super hybrid rice P88S/0389.[Method] Chlorophyll and carotenoid contents were measured via the method of Wellburn and Lichtenthaler,and the photosynthetic rate and chlorophyll fluorescence parameters were measured using portable photosynthesis system.Through comparison of above measured indices between P88S/0389 and its parents,the photosynthetic characteristics were obtained.[Result] The pigment content of P88S/0389 lied between their parents,and detailedly was closer to its female parent at earlier growth stage and to its male parent at latter stage,respectively.The Pn,Fv/Fo,Fv/Fm and qP of the flag leaf of P88S/0389 were all higher than those of its parents,while the degradation rates of these parameters were slower than those of its parents.The qN of flag leaf was lower than those of its parents,and the increasing rate of qN of P88S/0389 was also slower than those of its parents,indicating the great heterosis of P88S/0389 to its parents in photosynthetic capacity.The data show that P88S/0389 is endowed with stronger capacities in light energy absorption,transformation and carbon fixation compared to its parents.[Conclusion] The light energy absorbed by hybrid mainly contributes to photochemical reaction,and little for heat dissipation.For ensuring high yield,the rice cultivars selected for production should synchronously possess higher photosynthetic rate and longer high value duration. 相似文献
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Preliminary Study on the Photosynthetic Characteristics of Super Hybrid Rice P88S/0389 总被引：2，自引：0，他引：2
ZHANG Ji-zhen MENG Wei-dong CAO Sai DENG Xiao-feng .Key Laboratory of Chinese Ministry of Education for Tropical Biological Resources Hainan University Public Experiment Center of Hainan University Center for Experimental Biotechnology of Hainan University Haikou .Research Institute of Foodstuff Crop HAAS Haikou .Biotechnology 《（《农业科学与技术》）编辑部》2008,(4)
[Objective] The aim of this study is to understand the high yield often photosynthetic mechanism of super hybrid rice P88S/0389.[Method] Chlorophyll and carotenoid contents were measured via the method of Wellburn and Lichtenthaler,and the photosynthetic rate and chlorophyll fluorescence parameters were measured using portable photosynthesis system.Through comparison of above measured indices between P88S/0389 and its parents,the photosynthetic characteristics were obtained.[Result] The pigment content of P88S/0389 lied between their parents,and detailedly was closer to its female parent at earlier growth stage and to its male parent at latter stage,respectively.The Pn,Fv/Fo,Fv/Fm and qP of the flag leaf of P88S/0389 were all higher than those of its parents,while the degradation rates of these parameters were slower than those of its parents.The qN of flag leaf was lower than those of its parents,and the increasing rate of qN of P88S/0389 was also slower than those of its parents,indicating the great heterosis of P88S/0389 to its parents in photosynthetic capacity.The data show that P88S/0389 is endowed with stronger capacities in light energy absorption,transformation and carbon fixation compared to its parents.[Conclusion] The light energy absorbed by hybrid mainly contributes to photochemical reaction,and little for heat dissipation.For ensuring high yield,the rice cultivars selected for production should synchronously possess higher photosynthetic rate and longer high value duration. 相似文献
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《（《农业科学与技术》）编辑部》2008,(4)
[Objective] The aim of this study is to understand the high yield often photosynthetic mechanism of super hybrid rice P88S/0389.[Method] Chlorophyll and carotenoid contents were measured via the method of Wellburn and Lichtenthaler,and the photosynthetic rate and chlorophyll fluorescence parameters were measured using portable photosynthesis system.Through comparison of above measured indices between P88S/0389 and its parents,the photosynthetic characteristics were obtained.[Result] The pigment content of P88S/0389 lied between their parents,and detailedly was closer to its female parent at earlier growth stage and to its male parent at latter stage,respectively.The Pn,Fv/Fo,Fv/Fm and qP of the flag leaf of P88S/0389 were all higher than those of its parents,while the degradation rates of these parameters were slower than those of its parents.The qN of flag leaf was lower than those of its parents,and the increasing rate of qN of P88S/0389 was also slower than those of its parents,indicating the great heterosis of P88S/0389 to its parents in photosynthetic capacity.The data show that P88S/0389 is endowed with stronger capacities in light energy absorption,transformation and carbon fixation compared to its parents.[Conclusion] The light energy absorbed by hybrid mainly contributes to photochemical reaction,and little for heat dissipation.For ensuring high yield,the rice cultivars selected for production should synchronously possess higher photosynthetic rate and longer high value duration. 相似文献